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9cef6668 | 1 | # |
6845f129 | 2 | # SQUID Web Proxy Cache http://www.squid-cache.org/ |
9cef6668 | 3 | # ---------------------------------------------------------- |
4 | # | |
2b6662ba | 5 | # Squid is the result of efforts by numerous individuals from |
6 | # the Internet community; see the CONTRIBUTORS file for full | |
7 | # details. Many organizations have provided support for Squid's | |
8 | # development; see the SPONSORS file for full details. Squid is | |
9 | # Copyrighted (C) 2000 by the Regents of the University of | |
10 | # California; see the COPYRIGHT file for full details. Squid | |
11 | # incorporates software developed and/or copyrighted by other | |
12 | # sources; see the CREDITS file for full details. | |
9cef6668 | 13 | # |
14 | # This program is free software; you can redistribute it and/or modify | |
15 | # it under the terms of the GNU General Public License as published by | |
16 | # the Free Software Foundation; either version 2 of the License, or | |
17 | # (at your option) any later version. | |
96d88dcb | 18 | # |
9cef6668 | 19 | # This program is distributed in the hope that it will be useful, |
20 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | # GNU General Public License for more details. | |
96d88dcb | 23 | # |
9cef6668 | 24 | # You should have received a copy of the GNU General Public License |
25 | # along with this program; if not, write to the Free Software | |
26 | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. | |
27 | # | |
28 | ||
0f74202c | 29 | COMMENT_START |
cccac0a2 | 30 | WELCOME TO SQUID @VERSION@ |
31 | ---------------------------- | |
3a278cb8 | 32 | |
cccac0a2 | 33 | This is the default Squid configuration file. You may wish |
34 | to look at the Squid home page (http://www.squid-cache.org/) | |
35 | for the FAQ and other documentation. | |
3a278cb8 | 36 | |
cccac0a2 | 37 | The default Squid config file shows what the defaults for |
38 | various options happen to be. If you don't need to change the | |
39 | default, you shouldn't uncomment the line. Doing so may cause | |
40 | run-time problems. In some cases "none" refers to no default | |
41 | setting at all, while in other cases it refers to a valid | |
42 | option - the comments for that keyword indicate if this is the | |
43 | case. | |
debd9a31 | 44 | |
cccac0a2 | 45 | COMMENT_END |
3a278cb8 | 46 | |
592a09dc | 47 | COMMENT_START |
48 | Configuration options can be included using the "include" directive. | |
49 | Include takes a list of files to include. Quoting and wildcards is | |
50 | supported. | |
51 | ||
52 | For example, | |
53 | ||
54 | include /path/to/included/file/squid.acl.config | |
55 | ||
56 | Includes can be nested up to a hard-coded depth of 16 levels. | |
57 | This arbitrary restriction is to prevent recursive include references | |
58 | from causing Squid entering an infinite loop whilst trying to load | |
59 | configuration files. | |
60 | COMMENT_END | |
61 | ||
5473c134 | 62 | COMMENT_START |
41bd17a4 | 63 | OPTIONS FOR AUTHENTICATION |
5473c134 | 64 | ----------------------------------------------------------------------------- |
65 | COMMENT_END | |
66 | ||
41bd17a4 | 67 | NAME: auth_param |
68 | TYPE: authparam | |
69 | LOC: Config.authConfiguration | |
cccac0a2 | 70 | DEFAULT: none |
71 | DOC_START | |
41bd17a4 | 72 | This is used to define parameters for the various authentication |
73 | schemes supported by Squid. | |
cccac0a2 | 74 | |
41bd17a4 | 75 | format: auth_param scheme parameter [setting] |
cccac0a2 | 76 | |
41bd17a4 | 77 | The order in which authentication schemes are presented to the client is |
78 | dependent on the order the scheme first appears in config file. IE | |
79 | has a bug (it's not RFC 2617 compliant) in that it will use the basic | |
80 | scheme if basic is the first entry presented, even if more secure | |
81 | schemes are presented. For now use the order in the recommended | |
82 | settings section below. If other browsers have difficulties (don't | |
83 | recognize the schemes offered even if you are using basic) either | |
84 | put basic first, or disable the other schemes (by commenting out their | |
85 | program entry). | |
cccac0a2 | 86 | |
41bd17a4 | 87 | Once an authentication scheme is fully configured, it can only be |
88 | shutdown by shutting squid down and restarting. Changes can be made on | |
89 | the fly and activated with a reconfigure. I.E. You can change to a | |
90 | different helper, but not unconfigure the helper completely. | |
cccac0a2 | 91 | |
41bd17a4 | 92 | Please note that while this directive defines how Squid processes |
93 | authentication it does not automatically activate authentication. | |
94 | To use authentication you must in addition make use of ACLs based | |
95 | on login name in http_access (proxy_auth, proxy_auth_regex or | |
96 | external with %LOGIN used in the format tag). The browser will be | |
97 | challenged for authentication on the first such acl encountered | |
98 | in http_access processing and will also be re-challenged for new | |
99 | login credentials if the request is being denied by a proxy_auth | |
100 | type acl. | |
cccac0a2 | 101 | |
41bd17a4 | 102 | WARNING: authentication can't be used in a transparently intercepting |
103 | proxy as the client then thinks it is talking to an origin server and | |
104 | not the proxy. This is a limitation of bending the TCP/IP protocol to | |
105 | transparently intercepting port 80, not a limitation in Squid. | |
b3567eb5 FC |
106 | Ports flagged 'transparent', 'intercept', or 'tproxy' have |
107 | authentication disabled. | |
cccac0a2 | 108 | |
41bd17a4 | 109 | === Parameters for the basic scheme follow. === |
cccac0a2 | 110 | |
41bd17a4 | 111 | "program" cmdline |
112 | Specify the command for the external authenticator. Such a program | |
113 | reads a line containing "username password" and replies "OK" or | |
114 | "ERR" in an endless loop. "ERR" responses may optionally be followed | |
115 | by a error description available as %m in the returned error page. | |
b3567eb5 FC |
116 | If you use an authenticator, make sure you have 1 acl of type |
117 | proxy_auth. | |
cccac0a2 | 118 | |
41bd17a4 | 119 | By default, the basic authentication scheme is not used unless a |
120 | program is specified. | |
cccac0a2 | 121 | |
41bd17a4 | 122 | If you want to use the traditional NCSA proxy authentication, set |
123 | this line to something like | |
307b83b7 | 124 | |
41bd17a4 | 125 | auth_param basic program @DEFAULT_PREFIX@/libexec/ncsa_auth @DEFAULT_PREFIX@/etc/passwd |
9e7dbc51 | 126 | |
d2a89ac1 AJ |
127 | "utf8" on|off |
128 | HTTP uses iso-latin-1 as characterset, while some authentication | |
129 | backends such as LDAP expects UTF-8. If this is set to on Squid will | |
130 | translate the HTTP iso-latin-1 charset to UTF-8 before sending the | |
131 | username & password to the helper. | |
132 | ||
41bd17a4 | 133 | "children" numberofchildren |
134 | The number of authenticator processes to spawn. If you start too few | |
135 | Squid will have to wait for them to process a backlog of credential | |
136 | verifications, slowing it down. When password verifications are | |
137 | done via a (slow) network you are likely to need lots of | |
138 | authenticator processes. | |
139 | auth_param basic children 5 | |
9e7dbc51 | 140 | |
41bd17a4 | 141 | "concurrency" concurrency |
142 | The number of concurrent requests the helper can process. | |
143 | The default of 0 is used for helpers who only supports | |
144 | one request at a time. Setting this changes the protocol used to | |
145 | include a channel number first on the request/response line, allowing | |
146 | multiple requests to be sent to the same helper in parallell without | |
147 | wating for the response. | |
148 | Must not be set unless it's known the helper supports this. | |
149 | auth_param basic concurrency 0 | |
0fdafae7 | 150 | |
41bd17a4 | 151 | "realm" realmstring |
152 | Specifies the realm name which is to be reported to the | |
153 | client for the basic proxy authentication scheme (part of | |
154 | the text the user will see when prompted their username and | |
155 | password). There is no default. | |
156 | auth_param basic realm Squid proxy-caching web server | |
d1b63fc8 | 157 | |
41bd17a4 | 158 | "credentialsttl" timetolive |
159 | Specifies how long squid assumes an externally validated | |
160 | username:password pair is valid for - in other words how | |
161 | often the helper program is called for that user. Set this | |
162 | low to force revalidation with short lived passwords. Note | |
163 | setting this high does not impact your susceptibility | |
164 | to replay attacks unless you are using an one-time password | |
165 | system (such as SecureID). If you are using such a system, | |
166 | you will be vulnerable to replay attacks unless you also | |
167 | use the max_user_ip ACL in an http_access rule. | |
cccac0a2 | 168 | |
41bd17a4 | 169 | "casesensitive" on|off |
170 | Specifies if usernames are case sensitive. Most user databases are | |
171 | case insensitive allowing the same username to be spelled using both | |
172 | lower and upper case letters, but some are case sensitive. This | |
173 | makes a big difference for user_max_ip ACL processing and similar. | |
174 | auth_param basic casesensitive off | |
cccac0a2 | 175 | |
41bd17a4 | 176 | === Parameters for the digest scheme follow === |
cccac0a2 | 177 | |
41bd17a4 | 178 | "program" cmdline |
179 | Specify the command for the external authenticator. Such | |
180 | a program reads a line containing "username":"realm" and | |
181 | replies with the appropriate H(A1) value hex encoded or | |
182 | ERR if the user (or his H(A1) hash) does not exists. | |
183 | See rfc 2616 for the definition of H(A1). | |
184 | "ERR" responses may optionally be followed by a error description | |
185 | available as %m in the returned error page. | |
cccac0a2 | 186 | |
41bd17a4 | 187 | By default, the digest authentication scheme is not used unless a |
188 | program is specified. | |
b8c0c06d | 189 | |
41bd17a4 | 190 | If you want to use a digest authenticator, set this line to |
191 | something like | |
cccac0a2 | 192 | |
7ce93108 | 193 | auth_param digest program @DEFAULT_PREFIX@/bin/digest_pw_auth @DEFAULT_PREFIX@/etc/digpass |
cccac0a2 | 194 | |
d2a89ac1 AJ |
195 | "utf8" on|off |
196 | HTTP uses iso-latin-1 as characterset, while some authentication | |
197 | backends such as LDAP expects UTF-8. If this is set to on Squid will | |
198 | translate the HTTP iso-latin-1 charset to UTF-8 before sending the | |
199 | username & password to the helper. | |
200 | ||
41bd17a4 | 201 | "children" numberofchildren |
202 | The number of authenticator processes to spawn (no default). | |
203 | If you start too few Squid will have to wait for them to | |
204 | process a backlog of H(A1) calculations, slowing it down. | |
205 | When the H(A1) calculations are done via a (slow) network | |
206 | you are likely to need lots of authenticator processes. | |
207 | auth_param digest children 5 | |
cccac0a2 | 208 | |
41bd17a4 | 209 | "realm" realmstring |
210 | Specifies the realm name which is to be reported to the | |
211 | client for the digest proxy authentication scheme (part of | |
212 | the text the user will see when prompted their username and | |
213 | password). There is no default. | |
214 | auth_param digest realm Squid proxy-caching web server | |
cccac0a2 | 215 | |
41bd17a4 | 216 | "nonce_garbage_interval" timeinterval |
217 | Specifies the interval that nonces that have been issued | |
218 | to client_agent's are checked for validity. | |
cccac0a2 | 219 | |
41bd17a4 | 220 | "nonce_max_duration" timeinterval |
221 | Specifies the maximum length of time a given nonce will be | |
222 | valid for. | |
cccac0a2 | 223 | |
41bd17a4 | 224 | "nonce_max_count" number |
225 | Specifies the maximum number of times a given nonce can be | |
226 | used. | |
cccac0a2 | 227 | |
41bd17a4 | 228 | "nonce_strictness" on|off |
229 | Determines if squid requires strict increment-by-1 behavior | |
230 | for nonce counts, or just incrementing (off - for use when | |
231 | useragents generate nonce counts that occasionally miss 1 | |
232 | (ie, 1,2,4,6)). Default off. | |
cccac0a2 | 233 | |
41bd17a4 | 234 | "check_nonce_count" on|off |
235 | This directive if set to off can disable the nonce count check | |
236 | completely to work around buggy digest qop implementations in | |
237 | certain mainstream browser versions. Default on to check the | |
238 | nonce count to protect from authentication replay attacks. | |
cccac0a2 | 239 | |
41bd17a4 | 240 | "post_workaround" on|off |
241 | This is a workaround to certain buggy browsers who sends | |
242 | an incorrect request digest in POST requests when reusing | |
243 | the same nonce as acquired earlier on a GET request. | |
cccac0a2 | 244 | |
41bd17a4 | 245 | === NTLM scheme options follow === |
cccac0a2 | 246 | |
41bd17a4 | 247 | "program" cmdline |
248 | Specify the command for the external NTLM authenticator. | |
249 | Such a program reads exchanged NTLMSSP packets with | |
250 | the browser via Squid until authentication is completed. | |
251 | If you use an NTLM authenticator, make sure you have 1 acl | |
252 | of type proxy_auth. By default, the NTLM authenticator_program | |
253 | is not used. | |
cccac0a2 | 254 | |
41bd17a4 | 255 | auth_param ntlm program @DEFAULT_PREFIX@/bin/ntlm_auth |
cccac0a2 | 256 | |
41bd17a4 | 257 | "children" numberofchildren |
258 | The number of authenticator processes to spawn (no default). | |
259 | If you start too few Squid will have to wait for them to | |
260 | process a backlog of credential verifications, slowing it | |
261 | down. When credential verifications are done via a (slow) | |
262 | network you are likely to need lots of authenticator | |
263 | processes. | |
cccac0a2 | 264 | |
41bd17a4 | 265 | auth_param ntlm children 5 |
cccac0a2 | 266 | |
41bd17a4 | 267 | "keep_alive" on|off |
268 | If you experience problems with PUT/POST requests when using the | |
269 | Negotiate authentication scheme then you can try setting this to | |
270 | off. This will cause Squid to forcibly close the connection on | |
271 | the initial requests where the browser asks which schemes are | |
272 | supported by the proxy. | |
cccac0a2 | 273 | |
41bd17a4 | 274 | auth_param ntlm keep_alive on |
cccac0a2 | 275 | |
41bd17a4 | 276 | === Options for configuring the NEGOTIATE auth-scheme follow === |
cccac0a2 | 277 | |
41bd17a4 | 278 | "program" cmdline |
279 | Specify the command for the external Negotiate authenticator. | |
280 | This protocol is used in Microsoft Active-Directory enabled setups with | |
281 | the Microsoft Internet Explorer or Mozilla Firefox browsers. | |
282 | Its main purpose is to exchange credentials with the Squid proxy | |
283 | using the Kerberos mechanisms. | |
b3567eb5 FC |
284 | If you use a Negotiate authenticator, make sure you have at least |
285 | one acl of type proxy_auth active. By default, the negotiate | |
286 | authenticator_program is not used. | |
41bd17a4 | 287 | The only supported program for this role is the ntlm_auth |
288 | program distributed as part of Samba, version 4 or later. | |
cccac0a2 | 289 | |
41bd17a4 | 290 | auth_param negotiate program @DEFAULT_PREFIX@/bin/ntlm_auth --helper-protocol=gss-spnego |
cccac0a2 | 291 | |
41bd17a4 | 292 | "children" numberofchildren |
293 | The number of authenticator processes to spawn (no default). | |
294 | If you start too few Squid will have to wait for them to | |
295 | process a backlog of credential verifications, slowing it | |
296 | down. When crendential verifications are done via a (slow) | |
297 | network you are likely to need lots of authenticator | |
298 | processes. | |
299 | auth_param negotiate children 5 | |
d3803853 | 300 | |
41bd17a4 | 301 | "keep_alive" on|off |
302 | If you experience problems with PUT/POST requests when using the | |
303 | Negotiate authentication scheme then you can try setting this to | |
304 | off. This will cause Squid to forcibly close the connection on | |
305 | the initial requests where the browser asks which schemes are | |
306 | supported by the proxy. | |
527ee50d | 307 | |
41bd17a4 | 308 | auth_param negotiate keep_alive on |
cccac0a2 | 309 | |
41bd17a4 | 310 | NOCOMMENT_START |
311 | #Recommended minimum configuration per scheme: | |
312 | #auth_param negotiate program <uncomment and complete this line to activate> | |
313 | #auth_param negotiate children 5 | |
314 | #auth_param negotiate keep_alive on | |
315 | #auth_param ntlm program <uncomment and complete this line to activate> | |
316 | #auth_param ntlm children 5 | |
317 | #auth_param ntlm keep_alive on | |
318 | #auth_param digest program <uncomment and complete this line> | |
319 | #auth_param digest children 5 | |
320 | #auth_param digest realm Squid proxy-caching web server | |
321 | #auth_param digest nonce_garbage_interval 5 minutes | |
322 | #auth_param digest nonce_max_duration 30 minutes | |
323 | #auth_param digest nonce_max_count 50 | |
324 | #auth_param basic program <uncomment and complete this line> | |
325 | #auth_param basic children 5 | |
326 | #auth_param basic realm Squid proxy-caching web server | |
327 | #auth_param basic credentialsttl 2 hours | |
328 | NOCOMMENT_END | |
329 | DOC_END | |
cccac0a2 | 330 | |
41bd17a4 | 331 | NAME: authenticate_cache_garbage_interval |
332 | TYPE: time_t | |
333 | DEFAULT: 1 hour | |
334 | LOC: Config.authenticateGCInterval | |
335 | DOC_START | |
336 | The time period between garbage collection across the username cache. | |
337 | This is a tradeoff between memory utilization (long intervals - say | |
338 | 2 days) and CPU (short intervals - say 1 minute). Only change if you | |
339 | have good reason to. | |
340 | DOC_END | |
cccac0a2 | 341 | |
41bd17a4 | 342 | NAME: authenticate_ttl |
343 | TYPE: time_t | |
344 | DEFAULT: 1 hour | |
345 | LOC: Config.authenticateTTL | |
346 | DOC_START | |
347 | The time a user & their credentials stay in the logged in | |
348 | user cache since their last request. When the garbage | |
349 | interval passes, all user credentials that have passed their | |
350 | TTL are removed from memory. | |
351 | DOC_END | |
cccac0a2 | 352 | |
41bd17a4 | 353 | NAME: authenticate_ip_ttl |
354 | TYPE: time_t | |
355 | LOC: Config.authenticateIpTTL | |
356 | DEFAULT: 0 seconds | |
357 | DOC_START | |
358 | If you use proxy authentication and the 'max_user_ip' ACL, | |
359 | this directive controls how long Squid remembers the IP | |
360 | addresses associated with each user. Use a small value | |
361 | (e.g., 60 seconds) if your users might change addresses | |
362 | quickly, as is the case with dialups. You might be safe | |
363 | using a larger value (e.g., 2 hours) in a corporate LAN | |
364 | environment with relatively static address assignments. | |
365 | DOC_END | |
cccac0a2 | 366 | |
3d1e3e43 | 367 | COMMENT_START |
368 | ACCESS CONTROLS | |
369 | ----------------------------------------------------------------------------- | |
370 | COMMENT_END | |
371 | ||
41bd17a4 | 372 | NAME: external_acl_type |
373 | TYPE: externalAclHelper | |
374 | LOC: Config.externalAclHelperList | |
cccac0a2 | 375 | DEFAULT: none |
cccac0a2 | 376 | DOC_START |
41bd17a4 | 377 | This option defines external acl classes using a helper program |
378 | to look up the status | |
cccac0a2 | 379 | |
41bd17a4 | 380 | external_acl_type name [options] FORMAT.. /path/to/helper [helper arguments..] |
cccac0a2 | 381 | |
41bd17a4 | 382 | Options: |
cccac0a2 | 383 | |
41bd17a4 | 384 | ttl=n TTL in seconds for cached results (defaults to 3600 |
385 | for 1 hour) | |
386 | negative_ttl=n | |
387 | TTL for cached negative lookups (default same | |
388 | as ttl) | |
389 | children=n Number of acl helper processes spawn to service | |
390 | external acl lookups of this type. (default 5) | |
391 | concurrency=n concurrency level per process. Only used with helpers | |
392 | capable of processing more than one query at a time. | |
393 | cache=n result cache size, 0 is unbounded (default) | |
394 | grace=n Percentage remaining of TTL where a refresh of a | |
395 | cached entry should be initiated without needing to | |
396 | wait for a new reply. (default 0 for no grace period) | |
397 | protocol=2.5 Compatibility mode for Squid-2.5 external acl helpers | |
cc192b50 | 398 | ipv4 / ipv6 IP-mode used to communicate to this helper. |
399 | For compatability with older configurations and helpers | |
1de68cc1 | 400 | the default is 'ipv4'. |
cccac0a2 | 401 | |
41bd17a4 | 402 | FORMAT specifications |
cccac0a2 | 403 | |
41bd17a4 | 404 | %LOGIN Authenticated user login name |
405 | %EXT_USER Username from external acl | |
406 | %IDENT Ident user name | |
407 | %SRC Client IP | |
408 | %SRCPORT Client source port | |
409 | %URI Requested URI | |
410 | %DST Requested host | |
411 | %PROTO Requested protocol | |
412 | %PORT Requested port | |
413 | %PATH Requested URL path | |
414 | %METHOD Request method | |
415 | %MYADDR Squid interface address | |
416 | %MYPORT Squid http_port number | |
417 | %PATH Requested URL-path (including query-string if any) | |
418 | %USER_CERT SSL User certificate in PEM format | |
419 | %USER_CERTCHAIN SSL User certificate chain in PEM format | |
420 | %USER_CERT_xx SSL User certificate subject attribute xx | |
421 | %USER_CA_xx SSL User certificate issuer attribute xx | |
7b0ca1e8 | 422 | |
c68c9682 | 423 | %>{Header} HTTP request header "Header" |
7b0ca1e8 | 424 | %>{Hdr:member} |
c68c9682 | 425 | HTTP request header "Hdr" list member "member" |
7b0ca1e8 | 426 | %>{Hdr:;member} |
41bd17a4 | 427 | HTTP request header list member using ; as |
428 | list separator. ; can be any non-alphanumeric | |
429 | character. | |
cccac0a2 | 430 | |
c68c9682 | 431 | %<{Header} HTTP reply header "Header" |
7b0ca1e8 | 432 | %<{Hdr:member} |
c68c9682 | 433 | HTTP reply header "Hdr" list member "member" |
7b0ca1e8 AJ |
434 | %<{Hdr:;member} |
435 | HTTP reply header list member using ; as | |
436 | list separator. ; can be any non-alphanumeric | |
437 | character. | |
438 | ||
41bd17a4 | 439 | In addition to the above, any string specified in the referencing |
440 | acl will also be included in the helper request line, after the | |
441 | specified formats (see the "acl external" directive) | |
cccac0a2 | 442 | |
41bd17a4 | 443 | The helper receives lines per the above format specification, |
444 | and returns lines starting with OK or ERR indicating the validity | |
445 | of the request and optionally followed by additional keywords with | |
446 | more details. | |
cccac0a2 | 447 | |
41bd17a4 | 448 | General result syntax: |
cccac0a2 | 449 | |
41bd17a4 | 450 | OK/ERR keyword=value ... |
cccac0a2 | 451 | |
41bd17a4 | 452 | Defined keywords: |
cccac0a2 | 453 | |
41bd17a4 | 454 | user= The users name (login) |
455 | password= The users password (for login= cache_peer option) | |
456 | message= Message describing the reason. Available as %o | |
457 | in error pages | |
458 | tag= Apply a tag to a request (for both ERR and OK results) | |
459 | Only sets a tag, does not alter existing tags. | |
460 | log= String to be logged in access.log. Available as | |
461 | %ea in logformat specifications | |
934b03fc | 462 | |
41bd17a4 | 463 | If protocol=3.0 (the default) then URL escaping is used to protect |
464 | each value in both requests and responses. | |
6a566b9c | 465 | |
41bd17a4 | 466 | If using protocol=2.5 then all values need to be enclosed in quotes |
467 | if they may contain whitespace, or the whitespace escaped using \. | |
468 | And quotes or \ characters within the keyword value must be \ escaped. | |
1e5562e3 | 469 | |
41bd17a4 | 470 | When using the concurrency= option the protocol is changed by |
471 | introducing a query channel tag infront of the request/response. | |
472 | The query channel tag is a number between 0 and concurrency-1. | |
cccac0a2 | 473 | DOC_END |
474 | ||
41bd17a4 | 475 | NAME: acl |
476 | TYPE: acl | |
477 | LOC: Config.aclList | |
1f5bd0a4 | 478 | DEFAULT: all src all |
cccac0a2 | 479 | DOC_START |
41bd17a4 | 480 | Defining an Access List |
cccac0a2 | 481 | |
375eeb3b AJ |
482 | Every access list definition must begin with an aclname and acltype, |
483 | followed by either type-specific arguments or a quoted filename that | |
484 | they are read from. | |
cccac0a2 | 485 | |
375eeb3b AJ |
486 | acl aclname acltype argument ... |
487 | acl aclname acltype "file" ... | |
cccac0a2 | 488 | |
375eeb3b | 489 | When using "file", the file should contain one item per line. |
cccac0a2 | 490 | |
41bd17a4 | 491 | By default, regular expressions are CASE-SENSITIVE. To make |
492 | them case-insensitive, use the -i option. | |
cccac0a2 | 493 | |
b3567eb5 FC |
494 | Some acl types require suspending the current request in order |
495 | to access some external data source. | |
496 | Those which do are marked with the tag [slow], those which | |
497 | don't are marked as [fast]. | |
498 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl | |
499 | for further information | |
e988aa40 AJ |
500 | |
501 | ***** ACL TYPES AVAILABLE ***** | |
502 | ||
b3567eb5 FC |
503 | acl aclname src ip-address/netmask ... # clients IP address [fast] |
504 | acl aclname src addr1-addr2/netmask ... # range of addresses [fast] | |
505 | acl aclname dst ip-address/netmask ... # URL host's IP address [slow] | |
506 | acl aclname myip ip-address/netmask ... # local socket IP address [fast] | |
cccac0a2 | 507 | |
41bd17a4 | 508 | acl aclname arp mac-address ... (xx:xx:xx:xx:xx:xx notation) |
509 | # The arp ACL requires the special configure option --enable-arp-acl. | |
510 | # Furthermore, the ARP ACL code is not portable to all operating systems. | |
b3567eb5 FC |
511 | # It works on Linux, Solaris, Windows, FreeBSD, and some |
512 | # other *BSD variants. | |
513 | # [fast] | |
41bd17a4 | 514 | # |
515 | # NOTE: Squid can only determine the MAC address for clients that are on | |
b3567eb5 FC |
516 | # the same subnet. If the client is on a different subnet, |
517 | # then Squid cannot find out its MAC address. | |
518 | ||
519 | acl aclname srcdomain .foo.com ... | |
520 | # reverse lookup, from client IP [slow] | |
521 | acl aclname dstdomain .foo.com ... | |
522 | # Destination server from URL [slow] | |
523 | acl aclname srcdom_regex [-i] \.foo\.com ... | |
524 | # regex matching client name [slow] | |
525 | acl aclname dstdom_regex [-i] \.foo\.com ... | |
526 | # regex matching server [slow] | |
527 | # | |
41bd17a4 | 528 | # For dstdomain and dstdom_regex a reverse lookup is tried if a IP |
529 | # based URL is used and no match is found. The name "none" is used | |
530 | # if the reverse lookup fails. | |
9bc73deb | 531 | |
375eeb3b AJ |
532 | acl aclname src_as number ... |
533 | acl aclname dst_as number ... | |
b3567eb5 | 534 | # [fast] |
e988aa40 AJ |
535 | # Except for access control, AS numbers can be used for |
536 | # routing of requests to specific caches. Here's an | |
537 | # example for routing all requests for AS#1241 and only | |
538 | # those to mycache.mydomain.net: | |
539 | # acl asexample dst_as 1241 | |
540 | # cache_peer_access mycache.mydomain.net allow asexample | |
541 | # cache_peer_access mycache_mydomain.net deny all | |
7f7db318 | 542 | |
6db78a1a | 543 | acl aclname peername myPeer ... |
b3567eb5 | 544 | # [fast] |
6db78a1a AJ |
545 | # match against a named cache_peer entry |
546 | # set unique name= on cache_peer lines for reliable use. | |
547 | ||
375eeb3b | 548 | acl aclname time [day-abbrevs] [h1:m1-h2:m2] |
b3567eb5 | 549 | # [fast] |
375eeb3b AJ |
550 | # day-abbrevs: |
551 | # S - Sunday | |
552 | # M - Monday | |
553 | # T - Tuesday | |
554 | # W - Wednesday | |
555 | # H - Thursday | |
556 | # F - Friday | |
557 | # A - Saturday | |
558 | # h1:m1 must be less than h2:m2 | |
559 | ||
b3567eb5 FC |
560 | acl aclname url_regex [-i] ^http:// ... |
561 | # regex matching on whole URL [fast] | |
562 | acl aclname urlpath_regex [-i] \.gif$ ... | |
563 | # regex matching on URL path [fast] | |
e988aa40 | 564 | |
b3567eb5 FC |
565 | acl aclname port 80 70 21 0-1024... # destination TCP port [fast] |
566 | # ranges are alloed | |
567 | acl aclname myport 3128 ... # local socket TCP port [fast] | |
568 | acl aclname myportname 3128 ... # http(s)_port name [fast] | |
e988aa40 | 569 | |
b3567eb5 FC |
570 | acl aclname proto HTTP FTP ... # request protocol [fast] |
571 | ||
572 | acl aclname method GET POST ... # HTTP request method [fast] | |
e988aa40 | 573 | |
b3567eb5 FC |
574 | acl aclname http_status 200 301 500- 400-403 ... |
575 | # status code in reply [fast] | |
e988aa40 | 576 | |
375eeb3b | 577 | acl aclname browser [-i] regexp ... |
b3567eb5 | 578 | # pattern match on User-Agent header (see also req_header below) [fast] |
e988aa40 | 579 | |
375eeb3b | 580 | acl aclname referer_regex [-i] regexp ... |
b3567eb5 | 581 | # pattern match on Referer header [fast] |
41bd17a4 | 582 | # Referer is highly unreliable, so use with care |
e988aa40 | 583 | |
375eeb3b | 584 | acl aclname ident username ... |
41bd17a4 | 585 | acl aclname ident_regex [-i] pattern ... |
b3567eb5 | 586 | # string match on ident output [slow] |
41bd17a4 | 587 | # use REQUIRED to accept any non-null ident. |
cf5cc17e | 588 | |
41bd17a4 | 589 | acl aclname proxy_auth [-i] username ... |
590 | acl aclname proxy_auth_regex [-i] pattern ... | |
b3567eb5 FC |
591 | # perform http authentication challenge to the client and match against |
592 | # supplied credentials [slow] | |
593 | # | |
594 | # takes a list of allowed usernames. | |
41bd17a4 | 595 | # use REQUIRED to accept any valid username. |
596 | # | |
b3567eb5 FC |
597 | # Will use proxy authentication in forward-proxy scenarios, and plain |
598 | # http authenticaiton in reverse-proxy scenarios | |
599 | # | |
41bd17a4 | 600 | # NOTE: when a Proxy-Authentication header is sent but it is not |
601 | # needed during ACL checking the username is NOT logged | |
602 | # in access.log. | |
603 | # | |
604 | # NOTE: proxy_auth requires a EXTERNAL authentication program | |
605 | # to check username/password combinations (see | |
606 | # auth_param directive). | |
607 | # | |
e988aa40 AJ |
608 | # NOTE: proxy_auth can't be used in a transparent/intercepting proxy |
609 | # as the browser needs to be configured for using a proxy in order | |
41bd17a4 | 610 | # to respond to proxy authentication. |
8e8d4f30 | 611 | |
41bd17a4 | 612 | acl aclname snmp_community string ... |
b3567eb5 | 613 | # A community string to limit access to your SNMP Agent [fast] |
41bd17a4 | 614 | # Example: |
615 | # | |
616 | # acl snmppublic snmp_community public | |
934b03fc | 617 | |
41bd17a4 | 618 | acl aclname maxconn number |
619 | # This will be matched when the client's IP address has | |
b3567eb5 | 620 | # more than <number> HTTP connections established. [fast] |
1e5562e3 | 621 | |
41bd17a4 | 622 | acl aclname max_user_ip [-s] number |
623 | # This will be matched when the user attempts to log in from more | |
624 | # than <number> different ip addresses. The authenticate_ip_ttl | |
b3567eb5 | 625 | # parameter controls the timeout on the ip entries. [fast] |
41bd17a4 | 626 | # If -s is specified the limit is strict, denying browsing |
627 | # from any further IP addresses until the ttl has expired. Without | |
628 | # -s Squid will just annoy the user by "randomly" denying requests. | |
629 | # (the counter is reset each time the limit is reached and a | |
630 | # request is denied) | |
631 | # NOTE: in acceleration mode or where there is mesh of child proxies, | |
632 | # clients may appear to come from multiple addresses if they are | |
633 | # going through proxy farms, so a limit of 1 may cause user problems. | |
cccac0a2 | 634 | |
375eeb3b | 635 | acl aclname req_mime_type [-i] mime-type ... |
41bd17a4 | 636 | # regex match against the mime type of the request generated |
637 | # by the client. Can be used to detect file upload or some | |
b3567eb5 | 638 | # types HTTP tunneling requests [fast] |
41bd17a4 | 639 | # NOTE: This does NOT match the reply. You cannot use this |
640 | # to match the returned file type. | |
cccac0a2 | 641 | |
41bd17a4 | 642 | acl aclname req_header header-name [-i] any\.regex\.here |
643 | # regex match against any of the known request headers. May be | |
644 | # thought of as a superset of "browser", "referer" and "mime-type" | |
b3567eb5 | 645 | # ACL [fast] |
cccac0a2 | 646 | |
375eeb3b | 647 | acl aclname rep_mime_type [-i] mime-type ... |
41bd17a4 | 648 | # regex match against the mime type of the reply received by |
649 | # squid. Can be used to detect file download or some | |
b3567eb5 | 650 | # types HTTP tunneling requests. [fast] |
41bd17a4 | 651 | # NOTE: This has no effect in http_access rules. It only has |
652 | # effect in rules that affect the reply data stream such as | |
653 | # http_reply_access. | |
cccac0a2 | 654 | |
41bd17a4 | 655 | acl aclname rep_header header-name [-i] any\.regex\.here |
656 | # regex match against any of the known reply headers. May be | |
657 | # thought of as a superset of "browser", "referer" and "mime-type" | |
b3567eb5 | 658 | # ACLs [fast] |
cccac0a2 | 659 | |
375eeb3b | 660 | acl aclname external class_name [arguments...] |
41bd17a4 | 661 | # external ACL lookup via a helper class defined by the |
b3567eb5 | 662 | # external_acl_type directive [slow] |
cccac0a2 | 663 | |
41bd17a4 | 664 | acl aclname user_cert attribute values... |
665 | # match against attributes in a user SSL certificate | |
b3567eb5 | 666 | # attribute is one of DN/C/O/CN/L/ST [fast] |
cccac0a2 | 667 | |
41bd17a4 | 668 | acl aclname ca_cert attribute values... |
669 | # match against attributes a users issuing CA SSL certificate | |
b3567eb5 | 670 | # attribute is one of DN/C/O/CN/L/ST [fast] |
cccac0a2 | 671 | |
41bd17a4 | 672 | acl aclname ext_user username ... |
673 | acl aclname ext_user_regex [-i] pattern ... | |
b3567eb5 | 674 | # string match on username returned by external acl helper [slow] |
41bd17a4 | 675 | # use REQUIRED to accept any non-null user name. |
b3567eb5 | 676 | |
0ab50441 | 677 | acl aclname tag tagvalue ... |
b3567eb5 | 678 | # string match on tag returned by external acl helper [slow] |
cccac0a2 | 679 | |
41bd17a4 | 680 | Examples: |
681 | acl macaddress arp 09:00:2b:23:45:67 | |
682 | acl myexample dst_as 1241 | |
683 | acl password proxy_auth REQUIRED | |
684 | acl fileupload req_mime_type -i ^multipart/form-data$ | |
685 | acl javascript rep_mime_type -i ^application/x-javascript$ | |
cccac0a2 | 686 | |
41bd17a4 | 687 | NOCOMMENT_START |
688 | #Recommended minimum configuration: | |
41bd17a4 | 689 | acl manager proto cache_object |
ee776778 | 690 | acl localhost src 127.0.0.1/32 |
41bd17a4 | 691 | acl to_localhost dst 127.0.0.0/8 |
ee776778 | 692 | # |
693 | # Example rule allowing access from your local networks. | |
694 | # Adapt to list your (internal) IP networks from where browsing | |
695 | # should be allowed | |
696 | acl localnet src 10.0.0.0/8 # RFC1918 possible internal network | |
697 | acl localnet src 172.16.0.0/12 # RFC1918 possible internal network | |
698 | acl localnet src 192.168.0.0/16 # RFC1918 possible internal network | |
699 | # | |
41bd17a4 | 700 | acl SSL_ports port 443 |
701 | acl Safe_ports port 80 # http | |
702 | acl Safe_ports port 21 # ftp | |
703 | acl Safe_ports port 443 # https | |
704 | acl Safe_ports port 70 # gopher | |
705 | acl Safe_ports port 210 # wais | |
706 | acl Safe_ports port 1025-65535 # unregistered ports | |
707 | acl Safe_ports port 280 # http-mgmt | |
708 | acl Safe_ports port 488 # gss-http | |
709 | acl Safe_ports port 591 # filemaker | |
710 | acl Safe_ports port 777 # multiling http | |
711 | acl CONNECT method CONNECT | |
712 | NOCOMMENT_END | |
713 | DOC_END | |
cccac0a2 | 714 | |
3d674977 AJ |
715 | NAME: follow_x_forwarded_for |
716 | TYPE: acl_access | |
717 | IFDEF: FOLLOW_X_FORWARDED_FOR | |
718 | LOC: Config.accessList.followXFF | |
719 | DEFAULT: none | |
720 | DEFAULT_IF_NONE: deny all | |
721 | DOC_START | |
722 | Allowing or Denying the X-Forwarded-For header to be followed to | |
723 | find the original source of a request. | |
724 | ||
725 | Requests may pass through a chain of several other proxies | |
726 | before reaching us. The X-Forwarded-For header will contain a | |
727 | comma-separated list of the IP addresses in the chain, with the | |
728 | rightmost address being the most recent. | |
729 | ||
730 | If a request reaches us from a source that is allowed by this | |
731 | configuration item, then we consult the X-Forwarded-For header | |
732 | to see where that host received the request from. If the | |
733 | X-Forwarded-For header contains multiple addresses, and if | |
734 | acl_uses_indirect_client is on, then we continue backtracking | |
735 | until we reach an address for which we are not allowed to | |
736 | follow the X-Forwarded-For header, or until we reach the first | |
737 | address in the list. (If acl_uses_indirect_client is off, then | |
738 | it's impossible to backtrack through more than one level of | |
739 | X-Forwarded-For addresses.) | |
740 | ||
741 | The end result of this process is an IP address that we will | |
742 | refer to as the indirect client address. This address may | |
743 | be treated as the client address for access control, delay | |
744 | pools and logging, depending on the acl_uses_indirect_client, | |
745 | delay_pool_uses_indirect_client and log_uses_indirect_client | |
746 | options. | |
747 | ||
b3567eb5 FC |
748 | This clause only supports fast acl types. |
749 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
750 | ||
3d674977 AJ |
751 | SECURITY CONSIDERATIONS: |
752 | ||
753 | Any host for which we follow the X-Forwarded-For header | |
754 | can place incorrect information in the header, and Squid | |
755 | will use the incorrect information as if it were the | |
756 | source address of the request. This may enable remote | |
757 | hosts to bypass any access control restrictions that are | |
758 | based on the client's source addresses. | |
759 | ||
760 | For example: | |
761 | ||
762 | acl localhost src 127.0.0.1 | |
763 | acl my_other_proxy srcdomain .proxy.example.com | |
764 | follow_x_forwarded_for allow localhost | |
765 | follow_x_forwarded_for allow my_other_proxy | |
766 | DOC_END | |
767 | ||
768 | NAME: acl_uses_indirect_client | |
769 | COMMENT: on|off | |
770 | TYPE: onoff | |
771 | IFDEF: FOLLOW_X_FORWARDED_FOR | |
772 | DEFAULT: on | |
773 | LOC: Config.onoff.acl_uses_indirect_client | |
774 | DOC_START | |
775 | Controls whether the indirect client address | |
776 | (see follow_x_forwarded_for) is used instead of the | |
777 | direct client address in acl matching. | |
778 | DOC_END | |
779 | ||
780 | NAME: delay_pool_uses_indirect_client | |
781 | COMMENT: on|off | |
782 | TYPE: onoff | |
97a616ca | 783 | IFDEF: FOLLOW_X_FORWARDED_FOR DELAY_POOLS |
3d674977 AJ |
784 | DEFAULT: on |
785 | LOC: Config.onoff.delay_pool_uses_indirect_client | |
786 | DOC_START | |
787 | Controls whether the indirect client address | |
788 | (see follow_x_forwarded_for) is used instead of the | |
789 | direct client address in delay pools. | |
790 | DOC_END | |
791 | ||
792 | NAME: log_uses_indirect_client | |
793 | COMMENT: on|off | |
794 | TYPE: onoff | |
795 | IFDEF: FOLLOW_X_FORWARDED_FOR | |
796 | DEFAULT: on | |
797 | LOC: Config.onoff.log_uses_indirect_client | |
798 | DOC_START | |
799 | Controls whether the indirect client address | |
800 | (see follow_x_forwarded_for) is used instead of the | |
801 | direct client address in the access log. | |
802 | DOC_END | |
803 | ||
41bd17a4 | 804 | NAME: http_access |
805 | TYPE: acl_access | |
806 | LOC: Config.accessList.http | |
807 | DEFAULT: none | |
808 | DEFAULT_IF_NONE: deny all | |
809 | DOC_START | |
810 | Allowing or Denying access based on defined access lists | |
cccac0a2 | 811 | |
41bd17a4 | 812 | Access to the HTTP port: |
813 | http_access allow|deny [!]aclname ... | |
cccac0a2 | 814 | |
41bd17a4 | 815 | NOTE on default values: |
cccac0a2 | 816 | |
41bd17a4 | 817 | If there are no "access" lines present, the default is to deny |
818 | the request. | |
cccac0a2 | 819 | |
41bd17a4 | 820 | If none of the "access" lines cause a match, the default is the |
821 | opposite of the last line in the list. If the last line was | |
822 | deny, the default is allow. Conversely, if the last line | |
823 | is allow, the default will be deny. For these reasons, it is a | |
824 | good idea to have an "deny all" or "allow all" entry at the end | |
825 | of your access lists to avoid potential confusion. | |
cccac0a2 | 826 | |
b3567eb5 FC |
827 | This clause supports both fast and slow acl types. |
828 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
829 | ||
41bd17a4 | 830 | NOCOMMENT_START |
831 | #Recommended minimum configuration: | |
832 | # | |
833 | # Only allow cachemgr access from localhost | |
834 | http_access allow manager localhost | |
835 | http_access deny manager | |
836 | # Deny requests to unknown ports | |
837 | http_access deny !Safe_ports | |
838 | # Deny CONNECT to other than SSL ports | |
839 | http_access deny CONNECT !SSL_ports | |
840 | # | |
841 | # We strongly recommend the following be uncommented to protect innocent | |
842 | # web applications running on the proxy server who think the only | |
843 | # one who can access services on "localhost" is a local user | |
844 | #http_access deny to_localhost | |
845 | # | |
846 | # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS | |
c8f4eac4 | 847 | |
ee776778 | 848 | # Example rule allowing access from your local networks. |
849 | # Adapt localnet in the ACL section to list your (internal) IP networks | |
850 | # from where browsing should be allowed | |
851 | http_access allow localnet | |
afb33856 | 852 | http_access allow localhost |
7d90757b | 853 | |
41bd17a4 | 854 | # And finally deny all other access to this proxy |
855 | http_access deny all | |
856 | NOCOMMENT_END | |
857 | DOC_END | |
7d90757b | 858 | |
41bd17a4 | 859 | NAME: http_reply_access |
860 | TYPE: acl_access | |
861 | LOC: Config.accessList.reply | |
862 | DEFAULT: none | |
863 | DOC_START | |
864 | Allow replies to client requests. This is complementary to http_access. | |
cccac0a2 | 865 | |
41bd17a4 | 866 | http_reply_access allow|deny [!] aclname ... |
cccac0a2 | 867 | |
41bd17a4 | 868 | NOTE: if there are no access lines present, the default is to allow |
869 | all replies | |
1a224843 | 870 | |
41bd17a4 | 871 | If none of the access lines cause a match the opposite of the |
872 | last line will apply. Thus it is good practice to end the rules | |
873 | with an "allow all" or "deny all" entry. | |
b3567eb5 FC |
874 | |
875 | This clause supports both fast and slow acl types. | |
876 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
cccac0a2 | 877 | DOC_END |
878 | ||
41bd17a4 | 879 | NAME: icp_access |
880 | TYPE: acl_access | |
881 | LOC: Config.accessList.icp | |
882 | DEFAULT: none | |
883 | DEFAULT_IF_NONE: deny all | |
5473c134 | 884 | DOC_START |
41bd17a4 | 885 | Allowing or Denying access to the ICP port based on defined |
886 | access lists | |
5473c134 | 887 | |
41bd17a4 | 888 | icp_access allow|deny [!]aclname ... |
5473c134 | 889 | |
41bd17a4 | 890 | See http_access for details |
891 | ||
b3567eb5 FC |
892 | This clause only supports fast acl types. |
893 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
41bd17a4 | 894 | NOCOMMENT_START |
ee776778 | 895 | #Allow ICP queries from local networks only |
df2eec10 AJ |
896 | #icp_access allow localnet |
897 | #icp_access deny all | |
41bd17a4 | 898 | NOCOMMENT_END |
5473c134 | 899 | DOC_END |
900 | ||
41bd17a4 | 901 | NAME: htcp_access |
902 | IFDEF: USE_HTCP | |
903 | TYPE: acl_access | |
904 | LOC: Config.accessList.htcp | |
905 | DEFAULT: none | |
906 | DEFAULT_IF_NONE: deny all | |
5473c134 | 907 | DOC_START |
41bd17a4 | 908 | Allowing or Denying access to the HTCP port based on defined |
909 | access lists | |
5473c134 | 910 | |
41bd17a4 | 911 | htcp_access allow|deny [!]aclname ... |
5473c134 | 912 | |
41bd17a4 | 913 | See http_access for details |
5473c134 | 914 | |
0b48417e | 915 | NOTE: The default if no htcp_access lines are present is to |
916 | deny all traffic. This default may cause problems with peers | |
917 | using the htcp or htcp-oldsquid options. | |
918 | ||
b3567eb5 FC |
919 | This clause only supports fast acl types. |
920 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
ee776778 | 921 | NOCOMMENT_START |
922 | #Allow HTCP queries from local networks only | |
df2eec10 AJ |
923 | #htcp_access allow localnet |
924 | #htcp_access deny all | |
ee776778 | 925 | NOCOMMENT_END |
41bd17a4 | 926 | DOC_END |
5473c134 | 927 | |
41bd17a4 | 928 | NAME: htcp_clr_access |
929 | IFDEF: USE_HTCP | |
930 | TYPE: acl_access | |
931 | LOC: Config.accessList.htcp_clr | |
932 | DEFAULT: none | |
933 | DEFAULT_IF_NONE: deny all | |
934 | DOC_START | |
935 | Allowing or Denying access to purge content using HTCP based | |
936 | on defined access lists | |
5473c134 | 937 | |
41bd17a4 | 938 | htcp_clr_access allow|deny [!]aclname ... |
5473c134 | 939 | |
41bd17a4 | 940 | See http_access for details |
5473c134 | 941 | |
b3567eb5 FC |
942 | This clause only supports fast acl types. |
943 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
41bd17a4 | 944 | #Allow HTCP CLR requests from trusted peers |
945 | acl htcp_clr_peer src 172.16.1.2 | |
946 | htcp_clr_access allow htcp_clr_peer | |
5473c134 | 947 | DOC_END |
948 | ||
41bd17a4 | 949 | NAME: miss_access |
950 | TYPE: acl_access | |
951 | LOC: Config.accessList.miss | |
df2eec10 | 952 | DEFAULT: allow all |
5473c134 | 953 | DOC_START |
41bd17a4 | 954 | Use to force your neighbors to use you as a sibling instead of |
955 | a parent. For example: | |
5473c134 | 956 | |
41bd17a4 | 957 | acl localclients src 172.16.0.0/16 |
958 | miss_access allow localclients | |
959 | miss_access deny !localclients | |
5473c134 | 960 | |
41bd17a4 | 961 | This means only your local clients are allowed to fetch |
962 | MISSES and all other clients can only fetch HITS. | |
5473c134 | 963 | |
41bd17a4 | 964 | By default, allow all clients who passed the http_access rules |
965 | to fetch MISSES from us. | |
b3567eb5 FC |
966 | |
967 | This clause only supports fast acl types. | |
968 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
41bd17a4 | 969 | DOC_END |
970 | ||
971 | NAME: ident_lookup_access | |
972 | TYPE: acl_access | |
973 | IFDEF: USE_IDENT | |
974 | DEFAULT: none | |
975 | DEFAULT_IF_NONE: deny all | |
4daaf3cb | 976 | LOC: Ident::TheConfig.identLookup |
5473c134 | 977 | DOC_START |
41bd17a4 | 978 | A list of ACL elements which, if matched, cause an ident |
979 | (RFC 931) lookup to be performed for this request. For | |
980 | example, you might choose to always perform ident lookups | |
981 | for your main multi-user Unix boxes, but not for your Macs | |
982 | and PCs. By default, ident lookups are not performed for | |
983 | any requests. | |
5473c134 | 984 | |
41bd17a4 | 985 | To enable ident lookups for specific client addresses, you |
986 | can follow this example: | |
5473c134 | 987 | |
4daaf3cb | 988 | acl ident_aware_hosts src 198.168.1.0/24 |
41bd17a4 | 989 | ident_lookup_access allow ident_aware_hosts |
990 | ident_lookup_access deny all | |
5473c134 | 991 | |
4daaf3cb | 992 | Only src type ACL checks are fully supported. A srcdomain |
41bd17a4 | 993 | ACL might work at times, but it will not always provide |
994 | the correct result. | |
b3567eb5 FC |
995 | |
996 | This clause only supports fast acl types. | |
997 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
41bd17a4 | 998 | DOC_END |
5473c134 | 999 | |
5b0f5383 | 1000 | NAME: reply_body_max_size |
1001 | COMMENT: size [acl acl...] | |
1002 | TYPE: acl_b_size_t | |
1003 | DEFAULT: none | |
1004 | LOC: Config.ReplyBodySize | |
1005 | DOC_START | |
1006 | This option specifies the maximum size of a reply body. It can be | |
1007 | used to prevent users from downloading very large files, such as | |
1008 | MP3's and movies. When the reply headers are received, the | |
1009 | reply_body_max_size lines are processed, and the first line where | |
1010 | all (if any) listed ACLs are true is used as the maximum body size | |
1011 | for this reply. | |
1012 | ||
1013 | This size is checked twice. First when we get the reply headers, | |
1014 | we check the content-length value. If the content length value exists | |
1015 | and is larger than the allowed size, the request is denied and the | |
1016 | user receives an error message that says "the request or reply | |
1017 | is too large." If there is no content-length, and the reply | |
1018 | size exceeds this limit, the client's connection is just closed | |
1019 | and they will receive a partial reply. | |
1020 | ||
1021 | WARNING: downstream caches probably can not detect a partial reply | |
1022 | if there is no content-length header, so they will cache | |
1023 | partial responses and give them out as hits. You should NOT | |
1024 | use this option if you have downstream caches. | |
1025 | ||
1026 | WARNING: A maximum size smaller than the size of squid's error messages | |
1027 | will cause an infinite loop and crash squid. Ensure that the smallest | |
1028 | non-zero value you use is greater that the maximum header size plus | |
1029 | the size of your largest error page. | |
1030 | ||
1031 | If you set this parameter none (the default), there will be | |
1032 | no limit imposed. | |
3bc32f2f AJ |
1033 | |
1034 | Configuration Format is: | |
1035 | reply_body_max_size SIZE UNITS [acl ...] | |
1036 | ie. | |
1037 | reply_body_max_size 10 MB | |
1038 | ||
5b0f5383 | 1039 | DOC_END |
1040 | ||
1041 | COMMENT_START | |
1042 | NETWORK OPTIONS | |
1043 | ----------------------------------------------------------------------------- | |
1044 | COMMENT_END | |
1045 | ||
1046 | NAME: http_port ascii_port | |
1047 | TYPE: http_port_list | |
1048 | DEFAULT: none | |
1049 | LOC: Config.Sockaddr.http | |
1050 | DOC_START | |
1051 | Usage: port [options] | |
1052 | hostname:port [options] | |
1053 | 1.2.3.4:port [options] | |
1054 | ||
1055 | The socket addresses where Squid will listen for HTTP client | |
1056 | requests. You may specify multiple socket addresses. | |
1057 | There are three forms: port alone, hostname with port, and | |
1058 | IP address with port. If you specify a hostname or IP | |
1059 | address, Squid binds the socket to that specific | |
1060 | address. This replaces the old 'tcp_incoming_address' | |
1061 | option. Most likely, you do not need to bind to a specific | |
1062 | address, so you can use the port number alone. | |
1063 | ||
1064 | If you are running Squid in accelerator mode, you | |
1065 | probably want to listen on port 80 also, or instead. | |
1066 | ||
1067 | The -a command line option may be used to specify additional | |
1068 | port(s) where Squid listens for proxy request. Such ports will | |
1069 | be plain proxy ports with no options. | |
1070 | ||
1071 | You may specify multiple socket addresses on multiple lines. | |
1072 | ||
1073 | Options: | |
1074 | ||
e77bdb4e | 1075 | intercept Support for IP-Layer interception of |
5b0f5383 | 1076 | outgoing requests without browser settings. |
13b5cd0c | 1077 | NP: disables authentication and IPv6 on the port. |
5b0f5383 | 1078 | |
1079 | tproxy Support Linux TPROXY for spoofing outgoing | |
1080 | connections using the client IP address. | |
13b5cd0c | 1081 | NP: disables authentication and IPv6 on the port. |
5b0f5383 | 1082 | |
1083 | accel Accelerator mode. Also needs at least one of | |
1084 | vhost / vport / defaultsite. | |
1085 | ||
7f7bdd96 AJ |
1086 | allow-direct Allow direct forwarding in accelerator mode. Normally |
1087 | accelerated requests are denied direct forwarding as if | |
1088 | never_direct was used. | |
1089 | ||
5b0f5383 | 1090 | defaultsite=domainname |
1091 | What to use for the Host: header if it is not present | |
1092 | in a request. Determines what site (not origin server) | |
1093 | accelerators should consider the default. | |
1094 | Implies accel. | |
1095 | ||
1096 | vhost Accelerator mode using Host header for virtual | |
1097 | domain support. Implies accel. | |
1098 | ||
1099 | vport Accelerator with IP based virtual host support. | |
1100 | Implies accel. | |
1101 | ||
1102 | vport=NN As above, but uses specified port number rather | |
1103 | than the http_port number. Implies accel. | |
1104 | ||
1105 | protocol= Protocol to reconstruct accelerated requests with. | |
1106 | Defaults to http. | |
1107 | ||
b3567eb5 FC |
1108 | connection-auth[=on|off] |
1109 | use connection-auth=off to tell Squid to prevent | |
1110 | forwarding Microsoft connection oriented authentication | |
d67acb4e AJ |
1111 | (NTLM, Negotiate and Kerberos) |
1112 | ||
5b0f5383 | 1113 | disable-pmtu-discovery= |
1114 | Control Path-MTU discovery usage: | |
1115 | off lets OS decide on what to do (default). | |
1116 | transparent disable PMTU discovery when transparent | |
1117 | support is enabled. | |
1118 | always disable always PMTU discovery. | |
1119 | ||
1120 | In many setups of transparently intercepting proxies | |
1121 | Path-MTU discovery can not work on traffic towards the | |
1122 | clients. This is the case when the intercepting device | |
1123 | does not fully track connections and fails to forward | |
1124 | ICMP must fragment messages to the cache server. If you | |
1125 | have such setup and experience that certain clients | |
1126 | sporadically hang or never complete requests set | |
1127 | disable-pmtu-discovery option to 'transparent'. | |
1128 | ||
b3567eb5 | 1129 | sslBump Intercept each CONNECT request matching ssl_bump ACL, |
4c9da963 | 1130 | establish secure connection with the client and with |
1131 | the server, decrypt HTTP messages as they pass through | |
1132 | Squid, and treat them as unencrypted HTTP messages, | |
1133 | becoming the man-in-the-middle. | |
1134 | ||
1135 | When this option is enabled, additional options become | |
1136 | available to specify SSL-related properties of the | |
1137 | client-side connection: cert, key, version, cipher, | |
1138 | options, clientca, cafile, capath, crlfile, dhparams, | |
1139 | sslflags, and sslcontext. See the https_port directive | |
1140 | for more information on these options. | |
1141 | ||
1142 | The ssl_bump option is required to fully enable | |
1143 | the SslBump feature. | |
1144 | ||
81b6e9a7 | 1145 | name= Specifies a internal name for the port. Defaults to |
1146 | the port specification (port or addr:port) | |
1147 | ||
68924b6d | 1148 | tcpkeepalive[=idle,interval,timeout] |
b2130d58 | 1149 | Enable TCP keepalive probes of idle connections |
1150 | idle is the initial time before TCP starts probing | |
1151 | the connection, interval how often to probe, and | |
1152 | timeout the time before giving up. | |
1153 | ||
5b0f5383 | 1154 | If you run Squid on a dual-homed machine with an internal |
1155 | and an external interface we recommend you to specify the | |
1156 | internal address:port in http_port. This way Squid will only be | |
1157 | visible on the internal address. | |
1158 | ||
1159 | NOCOMMENT_START | |
1160 | # Squid normally listens to port 3128 | |
1161 | http_port @DEFAULT_HTTP_PORT@ | |
1162 | NOCOMMENT_END | |
1163 | DOC_END | |
1164 | ||
1165 | NAME: https_port | |
1166 | IFDEF: USE_SSL | |
1167 | TYPE: https_port_list | |
1168 | DEFAULT: none | |
1169 | LOC: Config.Sockaddr.https | |
1170 | DOC_START | |
1171 | Usage: [ip:]port cert=certificate.pem [key=key.pem] [options...] | |
1172 | ||
1173 | The socket address where Squid will listen for HTTPS client | |
1174 | requests. | |
1175 | ||
1176 | This is really only useful for situations where you are running | |
1177 | squid in accelerator mode and you want to do the SSL work at the | |
1178 | accelerator level. | |
1179 | ||
1180 | You may specify multiple socket addresses on multiple lines, | |
1181 | each with their own SSL certificate and/or options. | |
1182 | ||
1183 | Options: | |
1184 | ||
1185 | accel Accelerator mode. Also needs at least one of | |
1186 | defaultsite or vhost. | |
1187 | ||
1188 | defaultsite= The name of the https site presented on | |
1189 | this port. Implies accel. | |
1190 | ||
1191 | vhost Accelerator mode using Host header for virtual | |
1192 | domain support. Requires a wildcard certificate | |
1193 | or other certificate valid for more than one domain. | |
1194 | Implies accel. | |
1195 | ||
1196 | protocol= Protocol to reconstruct accelerated requests with. | |
1197 | Defaults to https. | |
1198 | ||
1199 | cert= Path to SSL certificate (PEM format). | |
1200 | ||
1201 | key= Path to SSL private key file (PEM format) | |
1202 | if not specified, the certificate file is | |
1203 | assumed to be a combined certificate and | |
1204 | key file. | |
1205 | ||
1206 | version= The version of SSL/TLS supported | |
1207 | 1 automatic (default) | |
1208 | 2 SSLv2 only | |
1209 | 3 SSLv3 only | |
1210 | 4 TLSv1 only | |
1211 | ||
1212 | cipher= Colon separated list of supported ciphers. | |
1213 | ||
1214 | options= Various SSL engine options. The most important | |
1215 | being: | |
1216 | NO_SSLv2 Disallow the use of SSLv2 | |
1217 | NO_SSLv3 Disallow the use of SSLv3 | |
1218 | NO_TLSv1 Disallow the use of TLSv1 | |
1219 | SINGLE_DH_USE Always create a new key when using | |
1220 | temporary/ephemeral DH key exchanges | |
1221 | See src/ssl_support.c or OpenSSL SSL_CTX_set_options | |
1222 | documentation for a complete list of options. | |
1223 | ||
1224 | clientca= File containing the list of CAs to use when | |
1225 | requesting a client certificate. | |
1226 | ||
1227 | cafile= File containing additional CA certificates to | |
1228 | use when verifying client certificates. If unset | |
1229 | clientca will be used. | |
1230 | ||
1231 | capath= Directory containing additional CA certificates | |
1232 | and CRL lists to use when verifying client certificates. | |
1233 | ||
1234 | crlfile= File of additional CRL lists to use when verifying | |
1235 | the client certificate, in addition to CRLs stored in | |
1236 | the capath. Implies VERIFY_CRL flag below. | |
1237 | ||
1238 | dhparams= File containing DH parameters for temporary/ephemeral | |
1239 | DH key exchanges. | |
1240 | ||
1241 | sslflags= Various flags modifying the use of SSL: | |
1242 | DELAYED_AUTH | |
1243 | Don't request client certificates | |
1244 | immediately, but wait until acl processing | |
1245 | requires a certificate (not yet implemented). | |
1246 | NO_DEFAULT_CA | |
1247 | Don't use the default CA lists built in | |
1248 | to OpenSSL. | |
1249 | NO_SESSION_REUSE | |
1250 | Don't allow for session reuse. Each connection | |
1251 | will result in a new SSL session. | |
1252 | VERIFY_CRL | |
1253 | Verify CRL lists when accepting client | |
1254 | certificates. | |
1255 | VERIFY_CRL_ALL | |
1256 | Verify CRL lists for all certificates in the | |
1257 | client certificate chain. | |
1258 | ||
1259 | sslcontext= SSL session ID context identifier. | |
1260 | ||
1261 | vport Accelerator with IP based virtual host support. | |
1262 | ||
1263 | vport=NN As above, but uses specified port number rather | |
1264 | than the https_port number. Implies accel. | |
1265 | ||
81b6e9a7 | 1266 | name= Specifies a internal name for the port. Defaults to |
1267 | the port specification (port or addr:port) | |
1268 | ||
5b0f5383 | 1269 | DOC_END |
1270 | ||
41bd17a4 | 1271 | NAME: tcp_outgoing_tos tcp_outgoing_ds tcp_outgoing_dscp |
1272 | TYPE: acl_tos | |
5473c134 | 1273 | DEFAULT: none |
41bd17a4 | 1274 | LOC: Config.accessList.outgoing_tos |
5473c134 | 1275 | DOC_START |
41bd17a4 | 1276 | Allows you to select a TOS/Diffserv value to mark outgoing |
1277 | connections with, based on the username or source address | |
1278 | making the request. | |
5473c134 | 1279 | |
41bd17a4 | 1280 | tcp_outgoing_tos ds-field [!]aclname ... |
cccac0a2 | 1281 | |
41bd17a4 | 1282 | Example where normal_service_net uses the TOS value 0x00 |
7def7206 | 1283 | and good_service_net uses 0x20 |
cccac0a2 | 1284 | |
41bd17a4 | 1285 | acl normal_service_net src 10.0.0.0/255.255.255.0 |
1286 | acl good_service_net src 10.0.1.0/255.255.255.0 | |
2c73de90 | 1287 | tcp_outgoing_tos 0x00 normal_service_net |
41bd17a4 | 1288 | tcp_outgoing_tos 0x20 good_service_net |
fa38076e | 1289 | |
41bd17a4 | 1290 | TOS/DSCP values really only have local significance - so you should |
575cb927 AJ |
1291 | know what you're specifying. For more information, see RFC2474, |
1292 | RFC2475, and RFC3260. | |
cccac0a2 | 1293 | |
41bd17a4 | 1294 | The TOS/DSCP byte must be exactly that - a octet value 0 - 255, or |
1295 | "default" to use whatever default your host has. Note that in | |
1296 | practice often only values 0 - 63 is usable as the two highest bits | |
1297 | have been redefined for use by ECN (RFC3168). | |
cccac0a2 | 1298 | |
41bd17a4 | 1299 | Processing proceeds in the order specified, and stops at first fully |
1300 | matching line. | |
cccac0a2 | 1301 | |
41bd17a4 | 1302 | Note: The use of this directive using client dependent ACLs is |
1303 | incompatible with the use of server side persistent connections. To | |
1304 | ensure correct results it is best to set server_persisten_connections | |
1305 | to off when using this directive in such configurations. | |
cccac0a2 | 1306 | DOC_END |
1307 | ||
41bd17a4 | 1308 | NAME: clientside_tos |
1309 | TYPE: acl_tos | |
cccac0a2 | 1310 | DEFAULT: none |
41bd17a4 | 1311 | LOC: Config.accessList.clientside_tos |
cccac0a2 | 1312 | DOC_START |
41bd17a4 | 1313 | Allows you to select a TOS/Diffserv value to mark client-side |
1314 | connections with, based on the username or source address | |
1315 | making the request. | |
1316 | DOC_END | |
cccac0a2 | 1317 | |
575cb927 AJ |
1318 | NAME: qos_flows |
1319 | TYPE: QosConfig | |
7172612f | 1320 | IFDEF: USE_ZPH_QOS |
575cb927 AJ |
1321 | DEFAULT: none |
1322 | LOC: Config.zph | |
7172612f | 1323 | DOC_START |
575cb927 AJ |
1324 | Allows you to select a TOS/DSCP value to mark outgoing |
1325 | connections with, based on where the reply was sourced. | |
7172612f | 1326 | |
575cb927 AJ |
1327 | TOS values really only have local significance - so you should |
1328 | know what you're specifying. For more information, see RFC2474, | |
1329 | RFC2475, and RFC3260. | |
7172612f | 1330 | |
575cb927 AJ |
1331 | The TOS/DSCP byte must be exactly that - octet value 0x00-0xFF. |
1332 | Note that in practice often only values up to 0x3F are usable | |
1333 | as the two highest bits have been redefined for use by ECN | |
1334 | (RFC3168). | |
7172612f | 1335 | |
575cb927 AJ |
1336 | This setting is configured by setting the source TOS values: |
1337 | ||
1338 | local-hit=0xFF Value to mark local cache hits. | |
1339 | ||
1340 | sibling-hit=0xFF Value to mark hits from sibling peers. | |
1341 | ||
1342 | parent-hit=0xFF Value to mark hits from parent peers. | |
1343 | ||
1344 | ||
2201bec6 AJ |
1345 | NOTE: 'miss' preserve feature is only possible on Linux at this time. |
1346 | ||
575cb927 AJ |
1347 | For the following to work correctly, you will need to patch your |
1348 | linux kernel with the TOS preserving ZPH patch. | |
1349 | The kernel patch can be downloaded from http://zph.bratcheda.org | |
1350 | ||
575cb927 AJ |
1351 | disable-preserve-miss |
1352 | If set, any HTTP response towards clients will | |
1353 | have the TOS value of the response comming from the | |
1354 | remote server masked with the value of miss-mask. | |
1355 | ||
1356 | miss-mask=0xFF | |
1357 | Allows you to mask certain bits in the TOS received from the | |
1358 | remote server, before copying the value to the TOS sent | |
1359 | towards clients. | |
1360 | Default: 0xFF (TOS from server is not changed). | |
7172612f | 1361 | |
7172612f AJ |
1362 | DOC_END |
1363 | ||
41bd17a4 | 1364 | NAME: tcp_outgoing_address |
1365 | TYPE: acl_address | |
1366 | DEFAULT: none | |
1367 | LOC: Config.accessList.outgoing_address | |
1368 | DOC_START | |
1369 | Allows you to map requests to different outgoing IP addresses | |
1370 | based on the username or source address of the user making | |
1371 | the request. | |
7f7db318 | 1372 | |
41bd17a4 | 1373 | tcp_outgoing_address ipaddr [[!]aclname] ... |
c33aa074 | 1374 | |
41bd17a4 | 1375 | Example where requests from 10.0.0.0/24 will be forwarded |
1376 | with source address 10.1.0.1, 10.0.2.0/24 forwarded with | |
1377 | source address 10.1.0.2 and the rest will be forwarded with | |
1378 | source address 10.1.0.3. | |
9197cd13 | 1379 | |
17148b2f | 1380 | acl normal_service_net src 10.0.0.0/24 |
1381 | acl good_service_net src 10.0.2.0/24 | |
1382 | tcp_outgoing_address 10.1.0.1 normal_service_net | |
1383 | tcp_outgoing_address 10.1.0.2 good_service_net | |
1384 | tcp_outgoing_address 10.1.0.3 | |
9197cd13 | 1385 | |
41bd17a4 | 1386 | Processing proceeds in the order specified, and stops at first fully |
1387 | matching line. | |
cccac0a2 | 1388 | |
41bd17a4 | 1389 | Note: The use of this directive using client dependent ACLs is |
1390 | incompatible with the use of server side persistent connections. To | |
1391 | ensure correct results it is best to set server_persistent_connections | |
1392 | to off when using this directive in such configurations. | |
cc192b50 | 1393 | |
1394 | ||
1395 | IPv6 Magic: | |
1396 | ||
b3567eb5 FC |
1397 | Squid is built with a capability of bridging the IPv4 and IPv6 |
1398 | internets. | |
cc192b50 | 1399 | tcp_outgoing_address as exampled above breaks this bridging by forcing |
1400 | all outbound traffic through a certain IPv4 which may be on the wrong | |
1401 | side of the IPv4/IPv6 boundary. | |
1402 | ||
1403 | To operate with tcp_outgoing_address and keep the bridging benefits | |
1404 | an additional ACL needs to be used which ensures the IPv6-bound traffic | |
1405 | is never forced or permitted out the IPv4 interface. | |
1406 | ||
1407 | acl to_ipv6 dst ipv6 | |
1408 | tcp_outgoing_address 2002::c001 good_service_net to_ipv6 | |
17148b2f | 1409 | tcp_outgoing_address 10.1.0.2 good_service_net !to_ipv6 |
cc192b50 | 1410 | |
1411 | tcp_outgoing_address 2002::beef normal_service_net to_ipv6 | |
17148b2f | 1412 | tcp_outgoing_address 10.1.0.1 normal_service_net !to_ipv6 |
cc192b50 | 1413 | |
1414 | tcp_outgoing_address 2002::1 to_ipv6 | |
17148b2f | 1415 | tcp_outgoing_address 10.1.0.3 !to_ipv6 |
6db78a1a AJ |
1416 | |
1417 | WARNING: | |
1418 | 'dst ipv6' bases its selection assuming DIRECT access. | |
1419 | If peers are used the peername ACL are needed to select outgoing | |
1420 | address which can link to the peer. | |
1421 | ||
cccac0a2 | 1422 | DOC_END |
1423 | ||
41bd17a4 | 1424 | COMMENT_START |
1425 | SSL OPTIONS | |
1426 | ----------------------------------------------------------------------------- | |
1427 | COMMENT_END | |
1428 | ||
1429 | NAME: ssl_unclean_shutdown | |
1430 | IFDEF: USE_SSL | |
cccac0a2 | 1431 | TYPE: onoff |
1432 | DEFAULT: off | |
41bd17a4 | 1433 | LOC: Config.SSL.unclean_shutdown |
cccac0a2 | 1434 | DOC_START |
41bd17a4 | 1435 | Some browsers (especially MSIE) bugs out on SSL shutdown |
1436 | messages. | |
cccac0a2 | 1437 | DOC_END |
1438 | ||
41bd17a4 | 1439 | NAME: ssl_engine |
1440 | IFDEF: USE_SSL | |
cccac0a2 | 1441 | TYPE: string |
41bd17a4 | 1442 | LOC: Config.SSL.ssl_engine |
1443 | DEFAULT: none | |
cccac0a2 | 1444 | DOC_START |
41bd17a4 | 1445 | The OpenSSL engine to use. You will need to set this if you |
1446 | would like to use hardware SSL acceleration for example. | |
cccac0a2 | 1447 | DOC_END |
1448 | ||
41bd17a4 | 1449 | NAME: sslproxy_client_certificate |
1450 | IFDEF: USE_SSL | |
cccac0a2 | 1451 | DEFAULT: none |
41bd17a4 | 1452 | LOC: Config.ssl_client.cert |
1453 | TYPE: string | |
cccac0a2 | 1454 | DOC_START |
41bd17a4 | 1455 | Client SSL Certificate to use when proxying https:// URLs |
cccac0a2 | 1456 | DOC_END |
1457 | ||
41bd17a4 | 1458 | NAME: sslproxy_client_key |
1459 | IFDEF: USE_SSL | |
cccac0a2 | 1460 | DEFAULT: none |
41bd17a4 | 1461 | LOC: Config.ssl_client.key |
1462 | TYPE: string | |
cccac0a2 | 1463 | DOC_START |
41bd17a4 | 1464 | Client SSL Key to use when proxying https:// URLs |
cccac0a2 | 1465 | DOC_END |
1466 | ||
41bd17a4 | 1467 | NAME: sslproxy_version |
1468 | IFDEF: USE_SSL | |
1469 | DEFAULT: 1 | |
1470 | LOC: Config.ssl_client.version | |
1471 | TYPE: int | |
cccac0a2 | 1472 | DOC_START |
41bd17a4 | 1473 | SSL version level to use when proxying https:// URLs |
cccac0a2 | 1474 | DOC_END |
1475 | ||
41bd17a4 | 1476 | NAME: sslproxy_options |
1477 | IFDEF: USE_SSL | |
1478 | DEFAULT: none | |
1479 | LOC: Config.ssl_client.options | |
1480 | TYPE: string | |
cccac0a2 | 1481 | DOC_START |
41bd17a4 | 1482 | SSL engine options to use when proxying https:// URLs |
cccac0a2 | 1483 | DOC_END |
1484 | ||
41bd17a4 | 1485 | NAME: sslproxy_cipher |
1486 | IFDEF: USE_SSL | |
1487 | DEFAULT: none | |
1488 | LOC: Config.ssl_client.cipher | |
1489 | TYPE: string | |
cccac0a2 | 1490 | DOC_START |
41bd17a4 | 1491 | SSL cipher list to use when proxying https:// URLs |
cccac0a2 | 1492 | DOC_END |
1493 | ||
41bd17a4 | 1494 | NAME: sslproxy_cafile |
1495 | IFDEF: USE_SSL | |
1496 | DEFAULT: none | |
1497 | LOC: Config.ssl_client.cafile | |
1498 | TYPE: string | |
cccac0a2 | 1499 | DOC_START |
41bd17a4 | 1500 | file containing CA certificates to use when verifying server |
1501 | certificates while proxying https:// URLs | |
cccac0a2 | 1502 | DOC_END |
0976f8db | 1503 | |
41bd17a4 | 1504 | NAME: sslproxy_capath |
1505 | IFDEF: USE_SSL | |
5473c134 | 1506 | DEFAULT: none |
41bd17a4 | 1507 | LOC: Config.ssl_client.capath |
1508 | TYPE: string | |
5473c134 | 1509 | DOC_START |
41bd17a4 | 1510 | directory containing CA certificates to use when verifying |
1511 | server certificates while proxying https:// URLs | |
5473c134 | 1512 | DOC_END |
1513 | ||
4c9da963 | 1514 | NAME: ssl_bump |
1515 | IFDEF: USE_SSL | |
1516 | TYPE: acl_access | |
1517 | LOC: Config.accessList.ssl_bump | |
1518 | DEFAULT: none | |
1519 | DOC_START | |
1520 | This ACL controls which CONNECT requests to an http_port | |
1521 | marked with an sslBump flag are actually "bumped". Please | |
1522 | see the sslBump flag of an http_port option for more details | |
1523 | about decoding proxied SSL connections. | |
1524 | ||
1525 | By default, no requests are bumped. | |
1526 | ||
1527 | See also: http_port sslBump | |
1528 | ||
b3567eb5 FC |
1529 | This clause only supports fast acl types. |
1530 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
4c9da963 | 1531 | NOCOMMENT_START |
1532 | # Example: Bump all requests except those originating from localhost and | |
1533 | # those going to webax.com or example.com sites. | |
1534 | # | |
1535 | # acl localhost src 127.0.0.1/32 | |
1536 | # acl broken_sites dstdomain .webax.com | |
1537 | # acl broken_sites dstdomain .example.com | |
1538 | # ssl_bump deny localhost | |
1539 | # ssl_bump deny broken_sites | |
1540 | # ssl_bump allow all | |
1541 | NOCOMMENT_END | |
1542 | DOC_END | |
1543 | ||
41bd17a4 | 1544 | NAME: sslproxy_flags |
1545 | IFDEF: USE_SSL | |
1546 | DEFAULT: none | |
1547 | LOC: Config.ssl_client.flags | |
1548 | TYPE: string | |
5473c134 | 1549 | DOC_START |
41bd17a4 | 1550 | Various flags modifying the use of SSL while proxying https:// URLs: |
4c9da963 | 1551 | DONT_VERIFY_PEER Accept certificates that fail verification. |
1552 | For refined control, see sslproxy_cert_error. | |
41bd17a4 | 1553 | NO_DEFAULT_CA Don't use the default CA list built in |
1554 | to OpenSSL. | |
5473c134 | 1555 | DOC_END |
1556 | ||
4c9da963 | 1557 | |
1558 | NAME: sslproxy_cert_error | |
1559 | IFDEF: USE_SSL | |
1560 | DEFAULT: none | |
1561 | LOC: Config.ssl_client.cert_error | |
1562 | TYPE: acl_access | |
1563 | DOC_START | |
1564 | Use this ACL to bypass server certificate validation errors. | |
1565 | ||
1566 | For example, the following lines will bypass all validation errors | |
1567 | when talking to servers located at 172.16.0.0/16. All other | |
1568 | validation errors will result in ERR_SECURE_CONNECT_FAIL error. | |
1569 | ||
1570 | acl BrokenServersAtTrustedIP dst 172.16.0.0/16 | |
1571 | sslproxy_cert_error allow BrokenServersAtTrustedIP | |
1572 | sslproxy_cert_error deny all | |
1573 | ||
b3567eb5 FC |
1574 | This clause only supports fast acl types. |
1575 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
1576 | Using slow acl types may result in server crashes | |
4c9da963 | 1577 | |
1578 | Without this option, all server certificate validation errors | |
1579 | terminate the transaction. Bypassing validation errors is dangerous | |
1580 | because an error usually implies that the server cannot be trusted and | |
1581 | the connection may be insecure. | |
1582 | ||
1583 | See also: sslproxy_flags and DONT_VERIFY_PEER. | |
1584 | ||
1585 | NOCOMMENT_START | |
1586 | #Default setting: | |
1587 | # sslproxy_cert_error deny all | |
1588 | NOCOMMENT_END | |
1589 | DOC_END | |
1590 | ||
1591 | ||
1592 | ||
41bd17a4 | 1593 | NAME: sslpassword_program |
1594 | IFDEF: USE_SSL | |
1595 | DEFAULT: none | |
1596 | LOC: Config.Program.ssl_password | |
1597 | TYPE: string | |
5473c134 | 1598 | DOC_START |
41bd17a4 | 1599 | Specify a program used for entering SSL key passphrases |
1600 | when using encrypted SSL certificate keys. If not specified | |
1601 | keys must either be unencrypted, or Squid started with the -N | |
1602 | option to allow it to query interactively for the passphrase. | |
5473c134 | 1603 | DOC_END |
1604 | ||
cccac0a2 | 1605 | COMMENT_START |
41bd17a4 | 1606 | OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM |
cccac0a2 | 1607 | ----------------------------------------------------------------------------- |
1608 | COMMENT_END | |
1609 | ||
41bd17a4 | 1610 | NAME: cache_peer |
1611 | TYPE: peer | |
1612 | DEFAULT: none | |
1613 | LOC: Config.peers | |
cccac0a2 | 1614 | DOC_START |
41bd17a4 | 1615 | To specify other caches in a hierarchy, use the format: |
cccac0a2 | 1616 | |
41bd17a4 | 1617 | cache_peer hostname type http-port icp-port [options] |
cccac0a2 | 1618 | |
41bd17a4 | 1619 | For example, |
cccac0a2 | 1620 | |
41bd17a4 | 1621 | # proxy icp |
1622 | # hostname type port port options | |
1623 | # -------------------- -------- ----- ----- ----------- | |
1624 | cache_peer parent.foo.net parent 3128 3130 proxy-only default | |
1625 | cache_peer sib1.foo.net sibling 3128 3130 proxy-only | |
1626 | cache_peer sib2.foo.net sibling 3128 3130 proxy-only | |
cccac0a2 | 1627 | |
41bd17a4 | 1628 | type: either 'parent', 'sibling', or 'multicast'. |
d5277f40 | 1629 | |
41bd17a4 | 1630 | proxy-port: The port number where the cache listens for proxy |
1631 | requests. | |
8d6275c0 | 1632 | |
41bd17a4 | 1633 | icp-port: Used for querying neighbor caches about |
1634 | objects. To have a non-ICP neighbor | |
df2eec10 | 1635 | specify '0' for the ICP port. |
41bd17a4 | 1636 | NOTE: Also requires icp_port option enabled to send/receive |
1637 | requests via this method. | |
a78278e2 | 1638 | |
41bd17a4 | 1639 | options: proxy-only |
1640 | weight=n | |
1641 | basetime=n | |
1642 | ttl=n | |
1643 | no-query | |
1644 | background-ping | |
1645 | default | |
1646 | round-robin | |
1647 | weighted-round-robin | |
1648 | carp | |
f7e1d9ce HN |
1649 | userhash |
1650 | sourcehash | |
41bd17a4 | 1651 | multicast-responder |
1652 | closest-only | |
1653 | no-digest | |
1654 | no-netdb-exchange | |
1655 | no-delay | |
1656 | login=user:password | PASS | *:password | |
1657 | connect-timeout=nn | |
ff9970cc | 1658 | connect-fail-limit=nn |
41bd17a4 | 1659 | digest-url=url |
1660 | allow-miss | |
1661 | max-conn=n | |
1662 | htcp | |
1663 | htcp-oldsquid | |
4f4fa815 BR |
1664 | htcp-no-clr |
1665 | htcp-no-purge-clr | |
1666 | htcp-only-clr | |
1667 | htcp-forward-clr | |
41bd17a4 | 1668 | originserver |
1669 | name=xxx | |
1670 | forceddomain=name | |
1671 | ssl | |
1672 | sslcert=/path/to/ssl/certificate | |
1673 | sslkey=/path/to/ssl/key | |
1674 | sslversion=1|2|3|4 | |
1675 | sslcipher=... | |
1676 | ssloptions=... | |
1677 | front-end-https[=on|auto] | |
b3567eb5 | 1678 | connection-auth[=on|off|auto] |
cccac0a2 | 1679 | |
41bd17a4 | 1680 | use 'proxy-only' to specify objects fetched |
1681 | from this cache should not be saved locally. | |
cccac0a2 | 1682 | |
41bd17a4 | 1683 | use 'weight=n' to affect the selection of a peer |
1684 | during any weighted peer-selection mechanisms. | |
1685 | The weight must be an integer; default is 1, | |
1686 | larger weights are favored more. | |
1687 | This option does not affect parent selection if a peering | |
1688 | protocol is not in use. | |
cccac0a2 | 1689 | |
41bd17a4 | 1690 | use 'basetime=n' to specify a base amount to |
1691 | be subtracted from round trip times of parents. | |
1692 | It is subtracted before division by weight in calculating | |
1693 | which parent to fectch from. If the rtt is less than the | |
1694 | base time the rtt is set to a minimal value. | |
cccac0a2 | 1695 | |
41bd17a4 | 1696 | use 'ttl=n' to specify a IP multicast TTL to use |
1697 | when sending an ICP queries to this address. | |
1698 | Only useful when sending to a multicast group. | |
1699 | Because we don't accept ICP replies from random | |
1700 | hosts, you must configure other group members as | |
1701 | peers with the 'multicast-responder' option below. | |
5473c134 | 1702 | |
41bd17a4 | 1703 | use 'no-query' to NOT send ICP queries to this |
1704 | neighbor. | |
5473c134 | 1705 | |
41bd17a4 | 1706 | use 'background-ping' to only send ICP queries to this |
1707 | neighbor infrequently. This is used to keep the neighbor | |
1708 | round trip time updated and is usually used in | |
1709 | conjunction with weighted-round-robin. | |
cccac0a2 | 1710 | |
41bd17a4 | 1711 | use 'default' if this is a parent cache which can |
1712 | be used as a "last-resort" if a peer cannot be located | |
1713 | by any of the peer-selection mechanisms. | |
1714 | If specified more than once, only the first is used. | |
cccac0a2 | 1715 | |
41bd17a4 | 1716 | use 'round-robin' to define a set of parents which |
1717 | should be used in a round-robin fashion in the | |
1718 | absence of any ICP queries. | |
cccac0a2 | 1719 | |
41bd17a4 | 1720 | use 'weighted-round-robin' to define a set of parents |
1721 | which should be used in a round-robin fashion with the | |
1722 | frequency of each parent being based on the round trip | |
1723 | time. Closer parents are used more often. | |
1724 | Usually used for background-ping parents. | |
cccac0a2 | 1725 | |
41bd17a4 | 1726 | use 'carp' to define a set of parents which should |
1727 | be used as a CARP array. The requests will be | |
1728 | distributed among the parents based on the CARP load | |
382db7eb | 1729 | balancing hash function based on their weight. |
cccac0a2 | 1730 | |
b3567eb5 FC |
1731 | use 'userhash' to load-balance amongst a set of parents |
1732 | based on the client proxy_auth or ident username. | |
f7e1d9ce | 1733 | |
b3567eb5 FC |
1734 | use 'sourcehash' to load-balance amongst a set of parents |
1735 | based on the client source ip. | |
f7e1d9ce | 1736 | |
41bd17a4 | 1737 | 'multicast-responder' indicates the named peer |
1738 | is a member of a multicast group. ICP queries will | |
1739 | not be sent directly to the peer, but ICP replies | |
1740 | will be accepted from it. | |
cccac0a2 | 1741 | |
41bd17a4 | 1742 | 'closest-only' indicates that, for ICP_OP_MISS |
1743 | replies, we'll only forward CLOSEST_PARENT_MISSes | |
1744 | and never FIRST_PARENT_MISSes. | |
cccac0a2 | 1745 | |
41bd17a4 | 1746 | use 'no-digest' to NOT request cache digests from |
1747 | this neighbor. | |
cccac0a2 | 1748 | |
41bd17a4 | 1749 | 'no-netdb-exchange' disables requesting ICMP |
1750 | RTT database (NetDB) from the neighbor. | |
cccac0a2 | 1751 | |
41bd17a4 | 1752 | use 'no-delay' to prevent access to this neighbor |
1753 | from influencing the delay pools. | |
7d90757b | 1754 | |
41bd17a4 | 1755 | use 'login=user:password' if this is a personal/workgroup |
1756 | proxy and your parent requires proxy authentication. | |
1757 | Note: The string can include URL escapes (i.e. %20 for | |
1758 | spaces). This also means % must be written as %%. | |
7d90757b | 1759 | |
41bd17a4 | 1760 | use 'login=PASS' if users must authenticate against |
1761 | the upstream proxy or in the case of a reverse proxy | |
1762 | configuration, the origin web server. This will pass | |
1763 | the users credentials as they are to the peer. | |
1764 | This only works for the Basic HTTP authentication scheme. | |
1765 | Note: To combine this with proxy_auth both proxies must | |
1766 | share the same user database as HTTP only allows for | |
1767 | a single login (one for proxy, one for origin server). | |
1768 | Also be warned this will expose your users proxy | |
1769 | password to the peer. USE WITH CAUTION | |
7d90757b | 1770 | |
41bd17a4 | 1771 | use 'login=*:password' to pass the username to the |
1772 | upstream cache, but with a fixed password. This is meant | |
1773 | to be used when the peer is in another administrative | |
1774 | domain, but it is still needed to identify each user. | |
1775 | The star can optionally be followed by some extra | |
1776 | information which is added to the username. This can | |
1777 | be used to identify this proxy to the peer, similar to | |
1778 | the login=username:password option above. | |
cccac0a2 | 1779 | |
41bd17a4 | 1780 | use 'connect-timeout=nn' to specify a peer |
1781 | specific connect timeout (also see the | |
1782 | peer_connect_timeout directive) | |
7f7db318 | 1783 | |
ff9970cc AJ |
1784 | use 'connect-fail-limit=nn' to specify how many times |
1785 | connecting to a peer must fail before it is marked as | |
1786 | down. Default is 10. | |
1787 | ||
41bd17a4 | 1788 | use 'digest-url=url' to tell Squid to fetch the cache |
1789 | digest (if digests are enabled) for this host from | |
1790 | the specified URL rather than the Squid default | |
1791 | location. | |
cccac0a2 | 1792 | |
41bd17a4 | 1793 | use 'allow-miss' to disable Squid's use of only-if-cached |
1794 | when forwarding requests to siblings. This is primarily | |
1795 | useful when icp_hit_stale is used by the sibling. To | |
1796 | extensive use of this option may result in forwarding | |
1797 | loops, and you should avoid having two-way peerings | |
1798 | with this option. (for example to deny peer usage on | |
1799 | requests from peer by denying cache_peer_access if the | |
1800 | source is a peer) | |
cccac0a2 | 1801 | |
41bd17a4 | 1802 | use 'max-conn=n' to limit the amount of connections Squid |
1803 | may open to this peer. | |
cccac0a2 | 1804 | |
41bd17a4 | 1805 | use 'htcp' to send HTCP, instead of ICP, queries |
1806 | to the neighbor. You probably also want to | |
1807 | set the "icp port" to 4827 instead of 3130. | |
0b48417e | 1808 | You MUST also set htcp_access expicitly. The default of |
1809 | deny all will prevent peer traffic. | |
cccac0a2 | 1810 | |
41bd17a4 | 1811 | use 'htcp-oldsquid' to send HTCP to old Squid versions |
0b48417e | 1812 | You MUST also set htcp_access expicitly. The default of |
1813 | deny all will prevent peer traffic. | |
cccac0a2 | 1814 | |
4f4fa815 BR |
1815 | use 'htcp-no-clr' to send HTCP to the neighbor but without |
1816 | sending any CLR requests. This cannot be used with | |
1817 | htcp-only-clr. | |
1818 | ||
1819 | use 'htcp-no-purge-clr' to send HTCP to the neighbor | |
1820 | including CLRs but only when they do not result from | |
1821 | PURGE requests. | |
1822 | ||
1823 | use 'htcp-only-clr' to send HTCP to the neighbor but ONLY | |
1824 | CLR requests. This cannot be used with htcp-no-clr. | |
1825 | ||
1826 | use 'htcp-forward-clr' to forward any HTCP CLR requests | |
1827 | this proxy receives to the peer. | |
1828 | ||
41bd17a4 | 1829 | 'originserver' causes this parent peer to be contacted as |
1830 | a origin server. Meant to be used in accelerator setups. | |
cccac0a2 | 1831 | |
41bd17a4 | 1832 | use 'name=xxx' if you have multiple peers on the same |
1833 | host but different ports. This name can be used to | |
1834 | differentiate the peers in cache_peer_access and similar | |
6db78a1a | 1835 | directives. Including the peername ACL type. |
cccac0a2 | 1836 | |
41bd17a4 | 1837 | use 'forceddomain=name' to forcibly set the Host header |
1838 | of requests forwarded to this peer. Useful in accelerator | |
1839 | setups where the server (peer) expects a certain domain | |
1840 | name and using redirectors to feed this domain name | |
1841 | is not feasible. | |
64658378 | 1842 | |
41bd17a4 | 1843 | use 'ssl' to indicate connections to this peer should |
1844 | be SSL/TLS encrypted. | |
cccac0a2 | 1845 | |
41bd17a4 | 1846 | use 'sslcert=/path/to/ssl/certificate' to specify a client |
1847 | SSL certificate to use when connecting to this peer. | |
4c9fa5d5 | 1848 | |
41bd17a4 | 1849 | use 'sslkey=/path/to/ssl/key' to specify the private SSL |
1850 | key corresponding to sslcert above. If 'sslkey' is not | |
1851 | specified 'sslcert' is assumed to reference a | |
1852 | combined file containing both the certificate and the key. | |
4c9fa5d5 | 1853 | |
41bd17a4 | 1854 | use sslversion=1|2|3|4 to specify the SSL version to use |
1855 | when connecting to this peer | |
1856 | 1 = automatic (default) | |
1857 | 2 = SSL v2 only | |
1858 | 3 = SSL v3 only | |
1859 | 4 = TLS v1 only | |
cccac0a2 | 1860 | |
41bd17a4 | 1861 | use sslcipher=... to specify the list of valid SSL ciphers |
1862 | to use when connecting to this peer. | |
cccac0a2 | 1863 | |
41bd17a4 | 1864 | use ssloptions=... to specify various SSL engine options: |
1865 | NO_SSLv2 Disallow the use of SSLv2 | |
1866 | NO_SSLv3 Disallow the use of SSLv3 | |
1867 | NO_TLSv1 Disallow the use of TLSv1 | |
1868 | See src/ssl_support.c or the OpenSSL documentation for | |
1869 | a more complete list. | |
cccac0a2 | 1870 | |
41bd17a4 | 1871 | use sslcafile=... to specify a file containing |
1872 | additional CA certificates to use when verifying the | |
1873 | peer certificate. | |
cccac0a2 | 1874 | |
41bd17a4 | 1875 | use sslcapath=... to specify a directory containing |
1876 | additional CA certificates to use when verifying the | |
1877 | peer certificate. | |
cccac0a2 | 1878 | |
41bd17a4 | 1879 | use sslcrlfile=... to specify a certificate revocation |
1880 | list file to use when verifying the peer certificate. | |
1881 | ||
1882 | use sslflags=... to specify various flags modifying the | |
1883 | SSL implementation: | |
1884 | DONT_VERIFY_PEER | |
1885 | Accept certificates even if they fail to | |
1886 | verify. | |
1887 | NO_DEFAULT_CA | |
1888 | Don't use the default CA list built in | |
1889 | to OpenSSL. | |
1890 | DONT_VERIFY_DOMAIN | |
1891 | Don't verify the peer certificate | |
1892 | matches the server name | |
cccac0a2 | 1893 | |
41bd17a4 | 1894 | use ssldomain= to specify the peer name as advertised |
1895 | in it's certificate. Used for verifying the correctness | |
1896 | of the received peer certificate. If not specified the | |
1897 | peer hostname will be used. | |
cccac0a2 | 1898 | |
41bd17a4 | 1899 | use front-end-https to enable the "Front-End-Https: On" |
1900 | header needed when using Squid as a SSL frontend in front | |
1901 | of Microsoft OWA. See MS KB document Q307347 for details | |
1902 | on this header. If set to auto the header will | |
1903 | only be added if the request is forwarded as a https:// | |
1904 | URL. | |
b3567eb5 FC |
1905 | |
1906 | use connection-auth=off to tell Squid that this peer does | |
1907 | not support Microsoft connection oriented authentication, | |
1908 | and any such challenges received from there should be | |
1909 | ignored. Default is auto to automatically determine the | |
1910 | status of the peer. | |
41bd17a4 | 1911 | DOC_END |
cccac0a2 | 1912 | |
41bd17a4 | 1913 | NAME: cache_peer_domain cache_host_domain |
1914 | TYPE: hostdomain | |
1915 | DEFAULT: none | |
1916 | LOC: none | |
1917 | DOC_START | |
1918 | Use to limit the domains for which a neighbor cache will be | |
1919 | queried. Usage: | |
cccac0a2 | 1920 | |
41bd17a4 | 1921 | cache_peer_domain cache-host domain [domain ...] |
1922 | cache_peer_domain cache-host !domain | |
cccac0a2 | 1923 | |
41bd17a4 | 1924 | For example, specifying |
cccac0a2 | 1925 | |
41bd17a4 | 1926 | cache_peer_domain parent.foo.net .edu |
cccac0a2 | 1927 | |
41bd17a4 | 1928 | has the effect such that UDP query packets are sent to |
1929 | 'bigserver' only when the requested object exists on a | |
1930 | server in the .edu domain. Prefixing the domainname | |
1931 | with '!' means the cache will be queried for objects | |
1932 | NOT in that domain. | |
cccac0a2 | 1933 | |
41bd17a4 | 1934 | NOTE: * Any number of domains may be given for a cache-host, |
1935 | either on the same or separate lines. | |
1936 | * When multiple domains are given for a particular | |
1937 | cache-host, the first matched domain is applied. | |
1938 | * Cache hosts with no domain restrictions are queried | |
1939 | for all requests. | |
1940 | * There are no defaults. | |
1941 | * There is also a 'cache_peer_access' tag in the ACL | |
1942 | section. | |
1943 | DOC_END | |
dd9b1776 | 1944 | |
41bd17a4 | 1945 | NAME: cache_peer_access |
1946 | TYPE: peer_access | |
1947 | DEFAULT: none | |
1948 | LOC: none | |
1949 | DOC_START | |
1950 | Similar to 'cache_peer_domain' but provides more flexibility by | |
1951 | using ACL elements. | |
cccac0a2 | 1952 | |
41bd17a4 | 1953 | cache_peer_access cache-host allow|deny [!]aclname ... |
dd9b1776 | 1954 | |
41bd17a4 | 1955 | The syntax is identical to 'http_access' and the other lists of |
1956 | ACL elements. See the comments for 'http_access' below, or | |
1957 | the Squid FAQ (http://www.squid-cache.org/FAQ/FAQ-10.html). | |
1958 | DOC_END | |
dd9b1776 | 1959 | |
41bd17a4 | 1960 | NAME: neighbor_type_domain |
1961 | TYPE: hostdomaintype | |
1962 | DEFAULT: none | |
1963 | LOC: none | |
1964 | DOC_START | |
1965 | usage: neighbor_type_domain neighbor parent|sibling domain domain ... | |
cccac0a2 | 1966 | |
41bd17a4 | 1967 | Modifying the neighbor type for specific domains is now |
1968 | possible. You can treat some domains differently than the the | |
1969 | default neighbor type specified on the 'cache_peer' line. | |
1970 | Normally it should only be necessary to list domains which | |
1971 | should be treated differently because the default neighbor type | |
1972 | applies for hostnames which do not match domains listed here. | |
6bf4f823 | 1973 | |
41bd17a4 | 1974 | EXAMPLE: |
dbe3992d | 1975 | cache_peer cache.foo.org parent 3128 3130 |
41bd17a4 | 1976 | neighbor_type_domain cache.foo.org sibling .com .net |
1977 | neighbor_type_domain cache.foo.org sibling .au .de | |
1978 | DOC_END | |
6bf4f823 | 1979 | |
41bd17a4 | 1980 | NAME: dead_peer_timeout |
1981 | COMMENT: (seconds) | |
1982 | DEFAULT: 10 seconds | |
1983 | TYPE: time_t | |
1984 | LOC: Config.Timeout.deadPeer | |
1985 | DOC_START | |
1986 | This controls how long Squid waits to declare a peer cache | |
1987 | as "dead." If there are no ICP replies received in this | |
1988 | amount of time, Squid will declare the peer dead and not | |
1989 | expect to receive any further ICP replies. However, it | |
1990 | continues to send ICP queries, and will mark the peer as | |
1991 | alive upon receipt of the first subsequent ICP reply. | |
699acd19 | 1992 | |
41bd17a4 | 1993 | This timeout also affects when Squid expects to receive ICP |
1994 | replies from peers. If more than 'dead_peer' seconds have | |
1995 | passed since the last ICP reply was received, Squid will not | |
1996 | expect to receive an ICP reply on the next query. Thus, if | |
1997 | your time between requests is greater than this timeout, you | |
1998 | will see a lot of requests sent DIRECT to origin servers | |
1999 | instead of to your parents. | |
2000 | DOC_END | |
cccac0a2 | 2001 | |
437823b4 AJ |
2002 | NAME: forward_max_tries |
2003 | DEFAULT: 10 | |
2004 | TYPE: int | |
2005 | LOC: Config.forward_max_tries | |
2006 | DOC_START | |
2007 | Controls how many different forward paths Squid will try | |
2008 | before giving up. See also forward_timeout. | |
2009 | DOC_END | |
2010 | ||
41bd17a4 | 2011 | NAME: hierarchy_stoplist |
2012 | TYPE: wordlist | |
2013 | DEFAULT: none | |
2014 | LOC: Config.hierarchy_stoplist | |
2015 | DOC_START | |
2016 | A list of words which, if found in a URL, cause the object to | |
2017 | be handled directly by this cache. In other words, use this | |
2018 | to not query neighbor caches for certain objects. You may | |
2019 | list this option multiple times. | |
2020 | Note: never_direct overrides this option. | |
cccac0a2 | 2021 | NOCOMMENT_START |
41bd17a4 | 2022 | #We recommend you to use at least the following line. |
2023 | hierarchy_stoplist cgi-bin ? | |
6b698a21 | 2024 | NOCOMMENT_END |
2025 | DOC_END | |
0976f8db | 2026 | |
41bd17a4 | 2027 | COMMENT_START |
2028 | MEMORY CACHE OPTIONS | |
2029 | ----------------------------------------------------------------------------- | |
2030 | COMMENT_END | |
2031 | ||
2032 | NAME: cache_mem | |
2033 | COMMENT: (bytes) | |
2034 | TYPE: b_size_t | |
df2eec10 | 2035 | DEFAULT: 256 MB |
41bd17a4 | 2036 | LOC: Config.memMaxSize |
6b698a21 | 2037 | DOC_START |
41bd17a4 | 2038 | NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS SIZE. |
2039 | IT ONLY PLACES A LIMIT ON HOW MUCH ADDITIONAL MEMORY SQUID WILL | |
2040 | USE AS A MEMORY CACHE OF OBJECTS. SQUID USES MEMORY FOR OTHER | |
2041 | THINGS AS WELL. SEE THE SQUID FAQ SECTION 8 FOR DETAILS. | |
2042 | ||
2043 | 'cache_mem' specifies the ideal amount of memory to be used | |
2044 | for: | |
2045 | * In-Transit objects | |
2046 | * Hot Objects | |
2047 | * Negative-Cached objects | |
2048 | ||
2049 | Data for these objects are stored in 4 KB blocks. This | |
2050 | parameter specifies the ideal upper limit on the total size of | |
2051 | 4 KB blocks allocated. In-Transit objects take the highest | |
2052 | priority. | |
2053 | ||
2054 | In-transit objects have priority over the others. When | |
2055 | additional space is needed for incoming data, negative-cached | |
2056 | and hot objects will be released. In other words, the | |
2057 | negative-cached and hot objects will fill up any unused space | |
2058 | not needed for in-transit objects. | |
2059 | ||
2060 | If circumstances require, this limit will be exceeded. | |
2061 | Specifically, if your incoming request rate requires more than | |
2062 | 'cache_mem' of memory to hold in-transit objects, Squid will | |
2063 | exceed this limit to satisfy the new requests. When the load | |
2064 | decreases, blocks will be freed until the high-water mark is | |
2065 | reached. Thereafter, blocks will be used to store hot | |
2066 | objects. | |
6b698a21 | 2067 | DOC_END |
0976f8db | 2068 | |
41bd17a4 | 2069 | NAME: maximum_object_size_in_memory |
2070 | COMMENT: (bytes) | |
2071 | TYPE: b_size_t | |
df2eec10 | 2072 | DEFAULT: 512 KB |
41bd17a4 | 2073 | LOC: Config.Store.maxInMemObjSize |
6b698a21 | 2074 | DOC_START |
41bd17a4 | 2075 | Objects greater than this size will not be attempted to kept in |
2076 | the memory cache. This should be set high enough to keep objects | |
2077 | accessed frequently in memory to improve performance whilst low | |
2078 | enough to keep larger objects from hoarding cache_mem. | |
6b698a21 | 2079 | DOC_END |
0976f8db | 2080 | |
41bd17a4 | 2081 | NAME: memory_replacement_policy |
2082 | TYPE: removalpolicy | |
2083 | LOC: Config.memPolicy | |
2084 | DEFAULT: lru | |
6b698a21 | 2085 | DOC_START |
41bd17a4 | 2086 | The memory replacement policy parameter determines which |
2087 | objects are purged from memory when memory space is needed. | |
7f7db318 | 2088 | |
41bd17a4 | 2089 | See cache_replacement_policy for details. |
2090 | DOC_END | |
6b698a21 | 2091 | |
41bd17a4 | 2092 | COMMENT_START |
2093 | DISK CACHE OPTIONS | |
2094 | ----------------------------------------------------------------------------- | |
2095 | COMMENT_END | |
6b698a21 | 2096 | |
41bd17a4 | 2097 | NAME: cache_replacement_policy |
2098 | TYPE: removalpolicy | |
2099 | LOC: Config.replPolicy | |
2100 | DEFAULT: lru | |
2101 | DOC_START | |
2102 | The cache replacement policy parameter determines which | |
2103 | objects are evicted (replaced) when disk space is needed. | |
6b698a21 | 2104 | |
41bd17a4 | 2105 | lru : Squid's original list based LRU policy |
2106 | heap GDSF : Greedy-Dual Size Frequency | |
2107 | heap LFUDA: Least Frequently Used with Dynamic Aging | |
2108 | heap LRU : LRU policy implemented using a heap | |
6b698a21 | 2109 | |
41bd17a4 | 2110 | Applies to any cache_dir lines listed below this. |
7f7db318 | 2111 | |
41bd17a4 | 2112 | The LRU policies keeps recently referenced objects. |
0976f8db | 2113 | |
41bd17a4 | 2114 | The heap GDSF policy optimizes object hit rate by keeping smaller |
2115 | popular objects in cache so it has a better chance of getting a | |
2116 | hit. It achieves a lower byte hit rate than LFUDA though since | |
2117 | it evicts larger (possibly popular) objects. | |
0976f8db | 2118 | |
41bd17a4 | 2119 | The heap LFUDA policy keeps popular objects in cache regardless of |
2120 | their size and thus optimizes byte hit rate at the expense of | |
2121 | hit rate since one large, popular object will prevent many | |
2122 | smaller, slightly less popular objects from being cached. | |
0976f8db | 2123 | |
41bd17a4 | 2124 | Both policies utilize a dynamic aging mechanism that prevents |
2125 | cache pollution that can otherwise occur with frequency-based | |
2126 | replacement policies. | |
7d90757b | 2127 | |
41bd17a4 | 2128 | NOTE: if using the LFUDA replacement policy you should increase |
2129 | the value of maximum_object_size above its default of 4096 KB to | |
2130 | to maximize the potential byte hit rate improvement of LFUDA. | |
dc1af3cf | 2131 | |
41bd17a4 | 2132 | For more information about the GDSF and LFUDA cache replacement |
2133 | policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html | |
2134 | and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html. | |
6b698a21 | 2135 | DOC_END |
0976f8db | 2136 | |
41bd17a4 | 2137 | NAME: cache_dir |
2138 | TYPE: cachedir | |
2139 | DEFAULT: none | |
41bd17a4 | 2140 | LOC: Config.cacheSwap |
6b698a21 | 2141 | DOC_START |
41bd17a4 | 2142 | Usage: |
0976f8db | 2143 | |
41bd17a4 | 2144 | cache_dir Type Directory-Name Fs-specific-data [options] |
0976f8db | 2145 | |
41bd17a4 | 2146 | You can specify multiple cache_dir lines to spread the |
2147 | cache among different disk partitions. | |
0976f8db | 2148 | |
41bd17a4 | 2149 | Type specifies the kind of storage system to use. Only "ufs" |
2150 | is built by default. To enable any of the other storage systems | |
2151 | see the --enable-storeio configure option. | |
0976f8db | 2152 | |
41bd17a4 | 2153 | 'Directory' is a top-level directory where cache swap |
2154 | files will be stored. If you want to use an entire disk | |
2155 | for caching, this can be the mount-point directory. | |
2156 | The directory must exist and be writable by the Squid | |
2157 | process. Squid will NOT create this directory for you. | |
0976f8db | 2158 | |
41bd17a4 | 2159 | The ufs store type: |
0976f8db | 2160 | |
41bd17a4 | 2161 | "ufs" is the old well-known Squid storage format that has always |
2162 | been there. | |
0976f8db | 2163 | |
41bd17a4 | 2164 | cache_dir ufs Directory-Name Mbytes L1 L2 [options] |
0976f8db | 2165 | |
41bd17a4 | 2166 | 'Mbytes' is the amount of disk space (MB) to use under this |
2167 | directory. The default is 100 MB. Change this to suit your | |
2168 | configuration. Do NOT put the size of your disk drive here. | |
2169 | Instead, if you want Squid to use the entire disk drive, | |
2170 | subtract 20% and use that value. | |
0976f8db | 2171 | |
41bd17a4 | 2172 | 'Level-1' is the number of first-level subdirectories which |
2173 | will be created under the 'Directory'. The default is 16. | |
0976f8db | 2174 | |
41bd17a4 | 2175 | 'Level-2' is the number of second-level subdirectories which |
2176 | will be created under each first-level directory. The default | |
2177 | is 256. | |
0976f8db | 2178 | |
41bd17a4 | 2179 | The aufs store type: |
7f7db318 | 2180 | |
41bd17a4 | 2181 | "aufs" uses the same storage format as "ufs", utilizing |
2182 | POSIX-threads to avoid blocking the main Squid process on | |
2183 | disk-I/O. This was formerly known in Squid as async-io. | |
38f9c547 | 2184 | |
41bd17a4 | 2185 | cache_dir aufs Directory-Name Mbytes L1 L2 [options] |
38f9c547 | 2186 | |
41bd17a4 | 2187 | see argument descriptions under ufs above |
38f9c547 | 2188 | |
41bd17a4 | 2189 | The diskd store type: |
38f9c547 | 2190 | |
41bd17a4 | 2191 | "diskd" uses the same storage format as "ufs", utilizing a |
2192 | separate process to avoid blocking the main Squid process on | |
2193 | disk-I/O. | |
4c3ef9b2 | 2194 | |
41bd17a4 | 2195 | cache_dir diskd Directory-Name Mbytes L1 L2 [options] [Q1=n] [Q2=n] |
0976f8db | 2196 | |
41bd17a4 | 2197 | see argument descriptions under ufs above |
0976f8db | 2198 | |
41bd17a4 | 2199 | Q1 specifies the number of unacknowledged I/O requests when Squid |
2200 | stops opening new files. If this many messages are in the queues, | |
2201 | Squid won't open new files. Default is 64 | |
0976f8db | 2202 | |
41bd17a4 | 2203 | Q2 specifies the number of unacknowledged messages when Squid |
2204 | starts blocking. If this many messages are in the queues, | |
2205 | Squid blocks until it receives some replies. Default is 72 | |
0976f8db | 2206 | |
41bd17a4 | 2207 | When Q1 < Q2 (the default), the cache directory is optimized |
2208 | for lower response time at the expense of a decrease in hit | |
2209 | ratio. If Q1 > Q2, the cache directory is optimized for | |
2210 | higher hit ratio at the expense of an increase in response | |
2211 | time. | |
0976f8db | 2212 | |
41bd17a4 | 2213 | The coss store type: |
0976f8db | 2214 | |
db263d62 AJ |
2215 | NP: COSS filesystem in Squid-3 has been deemed too unstable for |
2216 | production use and has thus been removed from this release. | |
2217 | We hope that it can be made usable again soon. | |
2218 | ||
41bd17a4 | 2219 | block-size=n defines the "block size" for COSS cache_dir's. |
2220 | Squid uses file numbers as block numbers. Since file numbers | |
2221 | are limited to 24 bits, the block size determines the maximum | |
2222 | size of the COSS partition. The default is 512 bytes, which | |
2223 | leads to a maximum cache_dir size of 512<<24, or 8 GB. Note | |
2224 | you should not change the coss block size after Squid | |
2225 | has written some objects to the cache_dir. | |
0976f8db | 2226 | |
41bd17a4 | 2227 | The coss file store has changed from 2.5. Now it uses a file |
2228 | called 'stripe' in the directory names in the config - and | |
2229 | this will be created by squid -z. | |
0976f8db | 2230 | |
41bd17a4 | 2231 | Common options: |
0976f8db | 2232 | |
41bd17a4 | 2233 | no-store, no new objects should be stored to this cache_dir |
0976f8db | 2234 | |
41bd17a4 | 2235 | max-size=n, refers to the max object size this storedir supports. |
2236 | It is used to initially choose the storedir to dump the object. | |
2237 | Note: To make optimal use of the max-size limits you should order | |
2238 | the cache_dir lines with the smallest max-size value first and the | |
2239 | ones with no max-size specification last. | |
0976f8db | 2240 | |
41bd17a4 | 2241 | Note for coss, max-size must be less than COSS_MEMBUF_SZ, |
2242 | which can be changed with the --with-coss-membuf-size=N configure | |
2243 | option. | |
bebc043b | 2244 | NOCOMMENT_START |
df2eec10 | 2245 | # cache_dir ufs @DEFAULT_SWAP_DIR@ 100 16 256 |
bebc043b | 2246 | NOCOMMENT_END |
6b698a21 | 2247 | DOC_END |
0976f8db | 2248 | |
41bd17a4 | 2249 | NAME: store_dir_select_algorithm |
2250 | TYPE: string | |
2251 | LOC: Config.store_dir_select_algorithm | |
2252 | DEFAULT: least-load | |
6b698a21 | 2253 | DOC_START |
41bd17a4 | 2254 | Set this to 'round-robin' as an alternative. |
6b698a21 | 2255 | DOC_END |
0976f8db | 2256 | |
41bd17a4 | 2257 | NAME: max_open_disk_fds |
2258 | TYPE: int | |
2259 | LOC: Config.max_open_disk_fds | |
2260 | DEFAULT: 0 | |
6b698a21 | 2261 | DOC_START |
41bd17a4 | 2262 | To avoid having disk as the I/O bottleneck Squid can optionally |
2263 | bypass the on-disk cache if more than this amount of disk file | |
2264 | descriptors are open. | |
2265 | ||
2266 | A value of 0 indicates no limit. | |
6b698a21 | 2267 | DOC_END |
0976f8db | 2268 | |
41bd17a4 | 2269 | NAME: minimum_object_size |
6b698a21 | 2270 | COMMENT: (bytes) |
47f6e231 | 2271 | TYPE: b_int64_t |
6b698a21 | 2272 | DEFAULT: 0 KB |
41bd17a4 | 2273 | LOC: Config.Store.minObjectSize |
6b698a21 | 2274 | DOC_START |
41bd17a4 | 2275 | Objects smaller than this size will NOT be saved on disk. The |
2276 | value is specified in kilobytes, and the default is 0 KB, which | |
2277 | means there is no minimum. | |
6b698a21 | 2278 | DOC_END |
0976f8db | 2279 | |
41bd17a4 | 2280 | NAME: maximum_object_size |
2281 | COMMENT: (bytes) | |
2282 | TYPE: b_int64_t | |
2283 | DEFAULT: 4096 KB | |
2284 | LOC: Config.Store.maxObjectSize | |
777831e0 | 2285 | DOC_START |
41bd17a4 | 2286 | Objects larger than this size will NOT be saved on disk. The |
2287 | value is specified in kilobytes, and the default is 4MB. If | |
2288 | you wish to get a high BYTES hit ratio, you should probably | |
2289 | increase this (one 32 MB object hit counts for 3200 10KB | |
2290 | hits). If you wish to increase speed more than your want to | |
2291 | save bandwidth you should leave this low. | |
777831e0 | 2292 | |
41bd17a4 | 2293 | NOTE: if using the LFUDA replacement policy you should increase |
2294 | this value to maximize the byte hit rate improvement of LFUDA! | |
2295 | See replacement_policy below for a discussion of this policy. | |
6b698a21 | 2296 | DOC_END |
0976f8db | 2297 | |
41bd17a4 | 2298 | NAME: cache_swap_low |
2299 | COMMENT: (percent, 0-100) | |
5473c134 | 2300 | TYPE: int |
41bd17a4 | 2301 | DEFAULT: 90 |
2302 | LOC: Config.Swap.lowWaterMark | |
2303 | DOC_NONE | |
2304 | ||
2305 | NAME: cache_swap_high | |
2306 | COMMENT: (percent, 0-100) | |
2307 | TYPE: int | |
2308 | DEFAULT: 95 | |
2309 | LOC: Config.Swap.highWaterMark | |
6b698a21 | 2310 | DOC_START |
41bd17a4 | 2311 | |
2312 | The low- and high-water marks for cache object replacement. | |
2313 | Replacement begins when the swap (disk) usage is above the | |
2314 | low-water mark and attempts to maintain utilization near the | |
2315 | low-water mark. As swap utilization gets close to high-water | |
2316 | mark object eviction becomes more aggressive. If utilization is | |
2317 | close to the low-water mark less replacement is done each time. | |
2318 | ||
2319 | Defaults are 90% and 95%. If you have a large cache, 5% could be | |
2320 | hundreds of MB. If this is the case you may wish to set these | |
2321 | numbers closer together. | |
6b698a21 | 2322 | DOC_END |
0976f8db | 2323 | |
5473c134 | 2324 | COMMENT_START |
41bd17a4 | 2325 | LOGFILE OPTIONS |
5473c134 | 2326 | ----------------------------------------------------------------------------- |
2327 | COMMENT_END | |
0976f8db | 2328 | |
41bd17a4 | 2329 | NAME: logformat |
2330 | TYPE: logformat | |
2331 | LOC: Config.Log.logformats | |
5473c134 | 2332 | DEFAULT: none |
6b698a21 | 2333 | DOC_START |
41bd17a4 | 2334 | Usage: |
0976f8db | 2335 | |
41bd17a4 | 2336 | logformat <name> <format specification> |
0976f8db | 2337 | |
41bd17a4 | 2338 | Defines an access log format. |
6b698a21 | 2339 | |
41bd17a4 | 2340 | The <format specification> is a string with embedded % format codes |
5473c134 | 2341 | |
41bd17a4 | 2342 | % format codes all follow the same basic structure where all but |
2343 | the formatcode is optional. Output strings are automatically escaped | |
2344 | as required according to their context and the output format | |
2345 | modifiers are usually not needed, but can be specified if an explicit | |
2346 | output format is desired. | |
6b698a21 | 2347 | |
41bd17a4 | 2348 | % ["|[|'|#] [-] [[0]width] [{argument}] formatcode |
0976f8db | 2349 | |
41bd17a4 | 2350 | " output in quoted string format |
2351 | [ output in squid text log format as used by log_mime_hdrs | |
2352 | # output in URL quoted format | |
2353 | ' output as-is | |
5473c134 | 2354 | |
41bd17a4 | 2355 | - left aligned |
2356 | width field width. If starting with 0 the | |
2357 | output is zero padded | |
2358 | {arg} argument such as header name etc | |
5473c134 | 2359 | |
41bd17a4 | 2360 | Format codes: |
5473c134 | 2361 | |
3ff65596 | 2362 | % a literal % character |
41bd17a4 | 2363 | >a Client source IP address |
2364 | >A Client FQDN | |
2365 | >p Client source port | |
2366 | <A Server IP address or peer name | |
2367 | la Local IP address (http_port) | |
2368 | lp Local port number (http_port) | |
2369 | ts Seconds since epoch | |
2370 | tu subsecond time (milliseconds) | |
2371 | tl Local time. Optional strftime format argument | |
3ff65596 | 2372 | default %d/%b/%Y:%H:%M:%S %z |
41bd17a4 | 2373 | tg GMT time. Optional strftime format argument |
3ff65596 | 2374 | default %d/%b/%Y:%H:%M:%S %z |
41bd17a4 | 2375 | tr Response time (milliseconds) |
3ff65596 AR |
2376 | dt Total time spent making DNS lookups (milliseconds) |
2377 | ||
2378 | HTTP cache related format codes: | |
2379 | ||
2380 | [http::]>h Request header. Optional header name argument | |
2381 | on the format header[:[separator]element] | |
2382 | [http::]<h Reply header. Optional header name argument | |
2383 | as for >h | |
2384 | [http::]un User name | |
2385 | [http::]ul User name from authentication | |
2386 | [http::]ui User name from ident | |
2387 | [http::]us User name from SSL | |
2388 | [http::]ue User name from external acl helper | |
2389 | [http::]>Hs HTTP status code sent to the client | |
2390 | [http::]<Hs HTTP status code received from the next hop | |
2391 | [http::]Ss Squid request status (TCP_MISS etc) | |
2392 | [http::]Sh Squid hierarchy status (DEFAULT_PARENT etc) | |
2393 | [http::]mt MIME content type | |
2394 | [http::]rm Request method (GET/POST etc) | |
2395 | [http::]ru Request URL | |
2396 | [http::]rp Request URL-Path excluding hostname | |
2397 | [http::]rv Request protocol version | |
2398 | [http::]et Tag returned by external acl | |
2399 | [http::]ea Log string returned by external acl | |
2400 | [http::]<st Sent reply size including HTTP headers | |
2401 | [http::]>st Received request size including HTTP headers. In the | |
2402 | case of chunked requests the chunked encoding metadata | |
2403 | are not included | |
2404 | [http::]>sh Received HTTP request headers size | |
2405 | [http::]<sh Sent HTTP reply headers size | |
2406 | [http::]st Request+Reply size including HTTP headers | |
2407 | [http::]<sH Reply high offset sent | |
2408 | [http::]<sS Upstream object size | |
2409 | [http::]<pt Peer response time in milliseconds. The timer starts | |
2410 | when the last request byte is sent to the next hop | |
2411 | and stops when the last response byte is received. | |
2412 | [http::]<tt Total server-side time in milliseconds. The timer | |
2413 | starts with the first connect request (or write I/O) | |
2414 | sent to the first selected peer. The timer stops | |
2415 | with the last I/O with the last peer. | |
2416 | ||
2417 | If ICAP is enabled, the following two codes become available (as | |
2418 | well as ICAP log codes documented with the icap_log option): | |
2419 | ||
2420 | icap::tt Total ICAP processing time for the HTTP | |
2421 | transaction. The timer ticks when ICAP | |
2422 | ACLs are checked and when ICAP | |
2423 | transaction is in progress. | |
2424 | ||
2425 | icap::<last_h The header of the last ICAP response | |
2426 | related to the HTTP transaction. Like | |
2427 | <h, accepts an optional header name | |
2428 | argument. Will not change semantics | |
2429 | when multiple ICAP transactions per HTTP | |
2430 | transaction are supported. | |
2431 | ||
2432 | If adaptation is enabled the following two codes become available: | |
2433 | ||
2434 | adapt::sum_trs Summed adaptation transaction response | |
2435 | times recorded as a comma-separated list in | |
2436 | the order of transaction start time. Each time | |
2437 | value is recorded as an integer number, | |
2438 | representing response time of one or more | |
2439 | adaptation (ICAP or eCAP) transaction in | |
2440 | milliseconds. When a failed transaction is | |
2441 | being retried or repeated, its time is not | |
2442 | logged individually but added to the | |
2443 | replacement (next) transaction. See also: | |
2444 | adapt::all_trs. | |
2445 | ||
2446 | adapt::all_trs All adaptation transaction response times. | |
2447 | Same as adaptation_strs but response times of | |
2448 | individual transactions are never added | |
2449 | together. Instead, all transaction response | |
2450 | times are recorded individually. | |
2451 | ||
2452 | You can prefix adapt::*_trs format codes with adaptation | |
2453 | service name in curly braces to record response time(s) specific | |
2454 | to that service. For example: %{my_service}adapt::sum_trs | |
5473c134 | 2455 | |
7d9acc3c AJ |
2456 | The default formats available (which do not need re-defining) are: |
2457 | ||
3ff65596 AR |
2458 | logformat squid %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %un %Sh/%<A %mt |
2459 | logformat squidmime %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %un %Sh/%<A %mt [%>h] [%<h] | |
2460 | logformat common %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %>Hs %<st %Ss:%Sh | |
2461 | logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %>Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh | |
5473c134 | 2462 | DOC_END |
2463 | ||
41bd17a4 | 2464 | NAME: access_log cache_access_log |
2465 | TYPE: access_log | |
2466 | LOC: Config.Log.accesslogs | |
02424612 | 2467 | DEFAULT: none |
01ddaf65 | 2468 | DEFAULT_IF_NONE: @DEFAULT_ACCESS_LOG@ squid |
5473c134 | 2469 | DOC_START |
41bd17a4 | 2470 | These files log client request activities. Has a line every HTTP or |
2471 | ICP request. The format is: | |
2472 | access_log <filepath> [<logformat name> [acl acl ...]] | |
2473 | access_log none [acl acl ...]] | |
5473c134 | 2474 | |
41bd17a4 | 2475 | Will log to the specified file using the specified format (which |
2476 | must be defined in a logformat directive) those entries which match | |
2477 | ALL the acl's specified (which must be defined in acl clauses). | |
2478 | If no acl is specified, all requests will be logged to this file. | |
5473c134 | 2479 | |
41bd17a4 | 2480 | To disable logging of a request use the filepath "none", in which case |
2481 | a logformat name should not be specified. | |
5473c134 | 2482 | |
41bd17a4 | 2483 | To log the request via syslog specify a filepath of "syslog": |
5473c134 | 2484 | |
41bd17a4 | 2485 | access_log syslog[:facility.priority] [format [acl1 [acl2 ....]]] |
2486 | where facility could be any of: | |
2487 | authpriv, daemon, local0 .. local7 or user. | |
5473c134 | 2488 | |
41bd17a4 | 2489 | And priority could be any of: |
2490 | err, warning, notice, info, debug. | |
df2eec10 AJ |
2491 | |
2492 | Default: | |
2493 | access_log @DEFAULT_ACCESS_LOG@ squid | |
41bd17a4 | 2494 | DOC_END |
5473c134 | 2495 | |
3ff65596 AR |
2496 | NAME: icap_log |
2497 | TYPE: access_log | |
2498 | IFDEF: ICAP_CLIENT | |
2499 | LOC: Config.Log.icaplogs | |
2500 | DEFAULT: none | |
2501 | DOC_START | |
2502 | ICAP log files record ICAP transaction summaries, one line per | |
2503 | transaction. | |
2504 | ||
2505 | The icap_log option format is: | |
2506 | icap_log <filepath> [<logformat name> [acl acl ...]] | |
2507 | icap_log none [acl acl ...]] | |
2508 | ||
2509 | Please see access_log option documentation for details. The two | |
2510 | kinds of logs share the overall configuration approach and many | |
2511 | features. | |
2512 | ||
2513 | ICAP processing of a single HTTP message or transaction may | |
2514 | require multiple ICAP transactions. In such cases, multiple | |
2515 | ICAP transaction log lines will correspond to a single access | |
2516 | log line. | |
2517 | ||
2518 | ICAP log uses logformat codes that make sense for an ICAP | |
2519 | transaction. Header-related codes are applied to the HTTP header | |
2520 | embedded in an ICAP server response, with the following caveats: | |
2521 | For REQMOD, there is no HTTP response header unless the ICAP | |
2522 | server performed request satisfaction. For RESPMOD, the HTTP | |
2523 | request header is the header sent to the ICAP server. For | |
2524 | OPTIONS, there are no HTTP headers. | |
2525 | ||
2526 | The following format codes are also available for ICAP logs: | |
2527 | ||
2528 | icap::<A ICAP server IP address. Similar to <A. | |
2529 | ||
2530 | icap::<service_name ICAP service name from the icap_service | |
2531 | option in Squid configuration file. | |
2532 | ||
2533 | icap::ru ICAP Request-URI. Similar to ru. | |
2534 | ||
2535 | icap::rm ICAP request method (REQMOD, RESPMOD, or | |
2536 | OPTIONS). Similar to existing rm. | |
2537 | ||
2538 | icap::>st Bytes sent to the ICAP server (TCP payload | |
2539 | only; i.e., what Squid writes to the socket). | |
2540 | ||
2541 | icap::<st Bytes received from the ICAP server (TCP | |
2542 | payload only; i.e., what Squid reads from | |
2543 | the socket). | |
2544 | ||
2545 | icap::tr Transaction response time (in | |
2546 | milliseconds). The timer starts when | |
2547 | the ICAP transaction is created and | |
2548 | stops when the transaction is completed. | |
2549 | Similar to tr. | |
2550 | ||
2551 | icap::tio Transaction I/O time (in milliseconds). The | |
2552 | timer starts when the first ICAP request | |
2553 | byte is scheduled for sending. The timers | |
2554 | stops when the last byte of the ICAP response | |
2555 | is received. | |
2556 | ||
2557 | icap::to Transaction outcome: ICAP_ERR* for all | |
2558 | transaction errors, ICAP_OPT for OPTION | |
2559 | transactions, ICAP_ECHO for 204 | |
2560 | responses, ICAP_MOD for message | |
2561 | modification, and ICAP_SAT for request | |
2562 | satisfaction. Similar to Ss. | |
2563 | ||
2564 | icap::Hs ICAP response status code. Similar to Hs. | |
2565 | ||
2566 | icap::>h ICAP request header(s). Similar to >h. | |
2567 | ||
2568 | icap::<h ICAP response header(s). Similar to <h. | |
2569 | ||
2570 | The default ICAP log format, which can be used without an explicit | |
2571 | definition, is called icap_squid: | |
2572 | ||
2573 | logformat icap_squid %ts.%03tu %6icap::tr %>a %icap::to/%03icap::Hs %icap::<size %icap::rm %icap::ru% %un -/%icap::<A - | |
2574 | ||
2575 | See also: logformat, log_icap, and %icap::<last_h | |
2576 | DOC_END | |
2577 | ||
5b0f5383 | 2578 | NAME: log_access |
2579 | TYPE: acl_access | |
2580 | LOC: Config.accessList.log | |
2581 | DEFAULT: none | |
2582 | COMMENT: allow|deny acl acl... | |
2583 | DOC_START | |
2584 | This options allows you to control which requests gets logged | |
2585 | to access.log (see access_log directive). Requests denied for | |
2586 | logging will also not be accounted for in performance counters. | |
b3567eb5 FC |
2587 | |
2588 | This clause only supports fast acl types. | |
2589 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
5b0f5383 | 2590 | DOC_END |
2591 | ||
3ff65596 AR |
2592 | NAME: log_icap |
2593 | TYPE: acl_access | |
2594 | IFDEF: ICAP_CLIENT | |
2595 | LOC: Config.accessList.icap | |
2596 | DEFAULT: none | |
2597 | DOC_START | |
2598 | This options allows you to control which requests get logged | |
2599 | to icap.log. See the icap_log directive for ICAP log details. | |
2600 | DOC_END | |
2601 | ||
41bd17a4 | 2602 | NAME: cache_store_log |
2603 | TYPE: string | |
df2eec10 | 2604 | DEFAULT: none |
41bd17a4 | 2605 | LOC: Config.Log.store |
2606 | DOC_START | |
2607 | Logs the activities of the storage manager. Shows which | |
2608 | objects are ejected from the cache, and which objects are | |
df2eec10 AJ |
2609 | saved and for how long. To disable, enter "none" or remove the line. |
2610 | There are not really utilities to analyze this data, so you can safely | |
41bd17a4 | 2611 | disable it. |
df2eec10 AJ |
2612 | NOCOMMENT_START |
2613 | # cache_store_log @DEFAULT_STORE_LOG@ | |
2614 | NOCOMMENT_END | |
5473c134 | 2615 | DOC_END |
2616 | ||
41bd17a4 | 2617 | NAME: cache_swap_state cache_swap_log |
2618 | TYPE: string | |
2619 | LOC: Config.Log.swap | |
5473c134 | 2620 | DEFAULT: none |
2621 | DOC_START | |
41bd17a4 | 2622 | Location for the cache "swap.state" file. This index file holds |
2623 | the metadata of objects saved on disk. It is used to rebuild | |
2624 | the cache during startup. Normally this file resides in each | |
2625 | 'cache_dir' directory, but you may specify an alternate | |
2626 | pathname here. Note you must give a full filename, not just | |
2627 | a directory. Since this is the index for the whole object | |
2628 | list you CANNOT periodically rotate it! | |
5473c134 | 2629 | |
41bd17a4 | 2630 | If %s can be used in the file name it will be replaced with a |
2631 | a representation of the cache_dir name where each / is replaced | |
2632 | with '.'. This is needed to allow adding/removing cache_dir | |
2633 | lines when cache_swap_log is being used. | |
5473c134 | 2634 | |
41bd17a4 | 2635 | If have more than one 'cache_dir', and %s is not used in the name |
2636 | these swap logs will have names such as: | |
5473c134 | 2637 | |
41bd17a4 | 2638 | cache_swap_log.00 |
2639 | cache_swap_log.01 | |
2640 | cache_swap_log.02 | |
5473c134 | 2641 | |
41bd17a4 | 2642 | The numbered extension (which is added automatically) |
2643 | corresponds to the order of the 'cache_dir' lines in this | |
2644 | configuration file. If you change the order of the 'cache_dir' | |
2645 | lines in this file, these index files will NOT correspond to | |
2646 | the correct 'cache_dir' entry (unless you manually rename | |
2647 | them). We recommend you do NOT use this option. It is | |
2648 | better to keep these index files in each 'cache_dir' directory. | |
5473c134 | 2649 | DOC_END |
2650 | ||
41bd17a4 | 2651 | NAME: logfile_rotate |
2652 | TYPE: int | |
2653 | DEFAULT: 10 | |
2654 | LOC: Config.Log.rotateNumber | |
5473c134 | 2655 | DOC_START |
41bd17a4 | 2656 | Specifies the number of logfile rotations to make when you |
2657 | type 'squid -k rotate'. The default is 10, which will rotate | |
2658 | with extensions 0 through 9. Setting logfile_rotate to 0 will | |
2659 | disable the file name rotation, but the logfiles are still closed | |
2660 | and re-opened. This will enable you to rename the logfiles | |
2661 | yourself just before sending the rotate signal. | |
5473c134 | 2662 | |
41bd17a4 | 2663 | Note, the 'squid -k rotate' command normally sends a USR1 |
2664 | signal to the running squid process. In certain situations | |
2665 | (e.g. on Linux with Async I/O), USR1 is used for other | |
2666 | purposes, so -k rotate uses another signal. It is best to get | |
2667 | in the habit of using 'squid -k rotate' instead of 'kill -USR1 | |
2668 | <pid>'. | |
62493678 AJ |
2669 | |
2670 | Note, from Squid-3.1 this option has no effect on the cache.log, | |
2671 | that log can be rotated separately by using debug_options | |
41bd17a4 | 2672 | DOC_END |
5473c134 | 2673 | |
41bd17a4 | 2674 | NAME: emulate_httpd_log |
2675 | COMMENT: on|off | |
2676 | TYPE: onoff | |
2677 | DEFAULT: off | |
2678 | LOC: Config.onoff.common_log | |
2679 | DOC_START | |
2680 | The Cache can emulate the log file format which many 'httpd' | |
2681 | programs use. To disable/enable this emulation, set | |
2682 | emulate_httpd_log to 'off' or 'on'. The default | |
2683 | is to use the native log format since it includes useful | |
2684 | information Squid-specific log analyzers use. | |
5473c134 | 2685 | DOC_END |
2686 | ||
41bd17a4 | 2687 | NAME: log_ip_on_direct |
2688 | COMMENT: on|off | |
2689 | TYPE: onoff | |
5473c134 | 2690 | DEFAULT: on |
41bd17a4 | 2691 | LOC: Config.onoff.log_ip_on_direct |
5473c134 | 2692 | DOC_START |
41bd17a4 | 2693 | Log the destination IP address in the hierarchy log tag when going |
2694 | direct. Earlier Squid versions logged the hostname here. If you | |
2695 | prefer the old way set this to off. | |
2696 | DOC_END | |
5473c134 | 2697 | |
41bd17a4 | 2698 | NAME: mime_table |
2699 | TYPE: string | |
2700 | DEFAULT: @DEFAULT_MIME_TABLE@ | |
2701 | LOC: Config.mimeTablePathname | |
2702 | DOC_START | |
2703 | Pathname to Squid's MIME table. You shouldn't need to change | |
2704 | this, but the default file contains examples and formatting | |
2705 | information if you do. | |
5473c134 | 2706 | DOC_END |
2707 | ||
41bd17a4 | 2708 | NAME: log_mime_hdrs |
2709 | COMMENT: on|off | |
2710 | TYPE: onoff | |
2711 | LOC: Config.onoff.log_mime_hdrs | |
2712 | DEFAULT: off | |
2713 | DOC_START | |
2714 | The Cache can record both the request and the response MIME | |
2715 | headers for each HTTP transaction. The headers are encoded | |
2716 | safely and will appear as two bracketed fields at the end of | |
2717 | the access log (for either the native or httpd-emulated log | |
2718 | formats). To enable this logging set log_mime_hdrs to 'on'. | |
2719 | DOC_END | |
5473c134 | 2720 | |
41bd17a4 | 2721 | NAME: useragent_log |
2722 | TYPE: string | |
2723 | LOC: Config.Log.useragent | |
2724 | DEFAULT: none | |
2725 | IFDEF: USE_USERAGENT_LOG | |
5473c134 | 2726 | DOC_START |
41bd17a4 | 2727 | Squid will write the User-Agent field from HTTP requests |
2728 | to the filename specified here. By default useragent_log | |
2729 | is disabled. | |
5473c134 | 2730 | DOC_END |
2731 | ||
41bd17a4 | 2732 | NAME: referer_log referrer_log |
2733 | TYPE: string | |
2734 | LOC: Config.Log.referer | |
2735 | DEFAULT: none | |
2736 | IFDEF: USE_REFERER_LOG | |
5473c134 | 2737 | DOC_START |
41bd17a4 | 2738 | Squid will write the Referer field from HTTP requests to the |
2739 | filename specified here. By default referer_log is disabled. | |
2740 | Note that "referer" is actually a misspelling of "referrer" | |
2741 | however the misspelt version has been accepted into the HTTP RFCs | |
2742 | and we accept both. | |
5473c134 | 2743 | DOC_END |
2744 | ||
41bd17a4 | 2745 | NAME: pid_filename |
2746 | TYPE: string | |
2747 | DEFAULT: @DEFAULT_PID_FILE@ | |
2748 | LOC: Config.pidFilename | |
5473c134 | 2749 | DOC_START |
41bd17a4 | 2750 | A filename to write the process-id to. To disable, enter "none". |
5473c134 | 2751 | DOC_END |
2752 | ||
41bd17a4 | 2753 | NAME: log_fqdn |
2754 | COMMENT: on|off | |
2755 | TYPE: onoff | |
2756 | DEFAULT: off | |
2757 | LOC: Config.onoff.log_fqdn | |
5473c134 | 2758 | DOC_START |
41bd17a4 | 2759 | Turn this on if you wish to log fully qualified domain names |
2760 | in the access.log. To do this Squid does a DNS lookup of all | |
2761 | IP's connecting to it. This can (in some situations) increase | |
2762 | latency, which makes your cache seem slower for interactive | |
2763 | browsing. | |
5473c134 | 2764 | DOC_END |
2765 | ||
41bd17a4 | 2766 | NAME: client_netmask |
2767 | TYPE: address | |
2768 | LOC: Config.Addrs.client_netmask | |
2769 | DEFAULT: 255.255.255.255 | |
5473c134 | 2770 | DOC_START |
41bd17a4 | 2771 | A netmask for client addresses in logfiles and cachemgr output. |
2772 | Change this to protect the privacy of your cache clients. | |
2773 | A netmask of 255.255.255.0 will log all IP's in that range with | |
2774 | the last digit set to '0'. | |
5473c134 | 2775 | DOC_END |
2776 | ||
41bd17a4 | 2777 | NAME: forward_log |
2778 | IFDEF: WIP_FWD_LOG | |
2779 | TYPE: string | |
2780 | DEFAULT: none | |
2781 | LOC: Config.Log.forward | |
5473c134 | 2782 | DOC_START |
41bd17a4 | 2783 | Logs the server-side requests. |
5473c134 | 2784 | |
41bd17a4 | 2785 | This is currently work in progress. |
5473c134 | 2786 | DOC_END |
2787 | ||
41bd17a4 | 2788 | NAME: strip_query_terms |
5473c134 | 2789 | TYPE: onoff |
41bd17a4 | 2790 | LOC: Config.onoff.strip_query_terms |
5473c134 | 2791 | DEFAULT: on |
2792 | DOC_START | |
41bd17a4 | 2793 | By default, Squid strips query terms from requested URLs before |
2794 | logging. This protects your user's privacy. | |
5473c134 | 2795 | DOC_END |
2796 | ||
41bd17a4 | 2797 | NAME: buffered_logs |
2798 | COMMENT: on|off | |
2799 | TYPE: onoff | |
2800 | DEFAULT: off | |
2801 | LOC: Config.onoff.buffered_logs | |
5473c134 | 2802 | DOC_START |
41bd17a4 | 2803 | cache.log log file is written with stdio functions, and as such |
2804 | it can be buffered or unbuffered. By default it will be unbuffered. | |
2805 | Buffering it can speed up the writing slightly (though you are | |
2806 | unlikely to need to worry unless you run with tons of debugging | |
2807 | enabled in which case performance will suffer badly anyway..). | |
6b698a21 | 2808 | DOC_END |
0976f8db | 2809 | |
2b753521 | 2810 | NAME: netdb_filename |
2811 | TYPE: string | |
2812 | DEFAULT: @DEFAULT_NETDB_FILE@ | |
2813 | LOC: Config.netdbFilename | |
fb6a61d1 | 2814 | IFDEF: USE_ICMP |
2b753521 | 2815 | DOC_START |
2816 | A filename where Squid stores it's netdb state between restarts. | |
2817 | To disable, enter "none". | |
2818 | DOC_END | |
2819 | ||
62493678 AJ |
2820 | COMMENT_START |
2821 | OPTIONS FOR TROUBLESHOOTING | |
2822 | ----------------------------------------------------------------------------- | |
2823 | COMMENT_END | |
2824 | ||
2825 | NAME: cache_log | |
2826 | TYPE: string | |
2827 | DEFAULT: none | |
2828 | DEFAULT_IF_NONE: @DEFAULT_CACHE_LOG@ | |
2829 | LOC: Debug::cache_log | |
2830 | DOC_START | |
2831 | Cache logging file. This is where general information about | |
2832 | your cache's behavior goes. You can increase the amount of data | |
2833 | logged to this file and how often its rotated with "debug_options" | |
2834 | DOC_END | |
2835 | ||
2836 | NAME: debug_options | |
2837 | TYPE: eol | |
47df1aa7 | 2838 | DEFAULT: ALL,1 |
62493678 AJ |
2839 | LOC: Debug::debugOptions |
2840 | DOC_START | |
2841 | Logging options are set as section,level where each source file | |
2842 | is assigned a unique section. Lower levels result in less | |
2843 | output, Full debugging (level 9) can result in a very large | |
2844 | log file, so be careful. | |
2845 | ||
2846 | The magic word "ALL" sets debugging levels for all sections. | |
2847 | We recommend normally running with "ALL,1". | |
2848 | ||
47df1aa7 AJ |
2849 | The rotate=N option can be used to keep more or less of these logs |
2850 | than would otherwise be kept by logfile_rotate. | |
62493678 AJ |
2851 | For most uses a single log should be enough to monitor current |
2852 | events affecting Squid. | |
2853 | DOC_END | |
2854 | ||
2855 | NAME: coredump_dir | |
2856 | TYPE: string | |
2857 | LOC: Config.coredump_dir | |
2858 | DEFAULT: none | |
2859 | DEFAULT_IF_NONE: none | |
2860 | DOC_START | |
2861 | By default Squid leaves core files in the directory from where | |
2862 | it was started. If you set 'coredump_dir' to a directory | |
2863 | that exists, Squid will chdir() to that directory at startup | |
2864 | and coredump files will be left there. | |
2865 | ||
2866 | NOCOMMENT_START | |
2867 | # Leave coredumps in the first cache dir | |
2868 | coredump_dir @DEFAULT_SWAP_DIR@ | |
2869 | NOCOMMENT_END | |
2870 | DOC_END | |
2871 | ||
2872 | ||
41bd17a4 | 2873 | COMMENT_START |
2874 | OPTIONS FOR FTP GATEWAYING | |
2875 | ----------------------------------------------------------------------------- | |
2876 | COMMENT_END | |
2877 | ||
2878 | NAME: ftp_user | |
2879 | TYPE: string | |
2880 | DEFAULT: Squid@ | |
2881 | LOC: Config.Ftp.anon_user | |
6b698a21 | 2882 | DOC_START |
41bd17a4 | 2883 | If you want the anonymous login password to be more informative |
2884 | (and enable the use of picky ftp servers), set this to something | |
2885 | reasonable for your domain, like wwwuser@somewhere.net | |
7f7db318 | 2886 | |
41bd17a4 | 2887 | The reason why this is domainless by default is the |
2888 | request can be made on the behalf of a user in any domain, | |
2889 | depending on how the cache is used. | |
2890 | Some ftp server also validate the email address is valid | |
2891 | (for example perl.com). | |
6b698a21 | 2892 | DOC_END |
0976f8db | 2893 | |
41bd17a4 | 2894 | NAME: ftp_list_width |
2895 | TYPE: size_t | |
2896 | DEFAULT: 32 | |
2897 | LOC: Config.Ftp.list_width | |
6b698a21 | 2898 | DOC_START |
41bd17a4 | 2899 | Sets the width of ftp listings. This should be set to fit in |
2900 | the width of a standard browser. Setting this too small | |
2901 | can cut off long filenames when browsing ftp sites. | |
6b698a21 | 2902 | DOC_END |
9e7dbc51 | 2903 | |
41bd17a4 | 2904 | NAME: ftp_passive |
2905 | TYPE: onoff | |
2906 | DEFAULT: on | |
2907 | LOC: Config.Ftp.passive | |
6b698a21 | 2908 | DOC_START |
41bd17a4 | 2909 | If your firewall does not allow Squid to use passive |
2910 | connections, turn off this option. | |
a689bd4e | 2911 | |
2912 | Use of ftp_epsv_all option requires this to be ON. | |
2913 | DOC_END | |
2914 | ||
2915 | NAME: ftp_epsv_all | |
2916 | TYPE: onoff | |
2917 | DEFAULT: off | |
2918 | LOC: Config.Ftp.epsv_all | |
2919 | DOC_START | |
2920 | FTP Protocol extensions permit the use of a special "EPSV ALL" command. | |
2921 | ||
2922 | NATs may be able to put the connection on a "fast path" through the | |
2923 | translator, as the EPRT command will never be used and therefore, | |
2924 | translation of the data portion of the segments will never be needed. | |
2925 | ||
b3567eb5 FC |
2926 | When a client only expects to do two-way FTP transfers this may be |
2927 | useful. | |
a689bd4e | 2928 | If squid finds that it must do a three-way FTP transfer after issuing |
2929 | an EPSV ALL command, the FTP session will fail. | |
2930 | ||
2931 | If you have any doubts about this option do not use it. | |
2932 | Squid will nicely attempt all other connection methods. | |
2933 | ||
51ee534d AJ |
2934 | Requires ftp_passive to be ON (default) for any effect. |
2935 | DOC_END | |
2936 | ||
2937 | NAME: ftp_epsv | |
2938 | TYPE: onoff | |
2939 | DEFAULT: on | |
2940 | LOC: Config.Ftp.epsv | |
2941 | DOC_START | |
2942 | FTP Protocol extensions permit the use of a special "EPSV" command. | |
2943 | ||
2944 | NATs may be able to put the connection on a "fast path" through the | |
b3567eb5 FC |
2945 | translator using EPSV, as the EPRT command will never be used |
2946 | and therefore, translation of the data portion of the segments | |
2947 | will never be needed. | |
51ee534d AJ |
2948 | |
2949 | Turning this OFF will prevent EPSV being attempted. | |
2950 | WARNING: Doing so will convert Squid back to the old behavior with all | |
2951 | the related problems with external NAT devices/layers. | |
2952 | ||
2953 | Requires ftp_passive to be ON (default) for any effect. | |
41bd17a4 | 2954 | DOC_END |
9e7dbc51 | 2955 | |
41bd17a4 | 2956 | NAME: ftp_sanitycheck |
2957 | TYPE: onoff | |
2958 | DEFAULT: on | |
2959 | LOC: Config.Ftp.sanitycheck | |
2960 | DOC_START | |
2961 | For security and data integrity reasons Squid by default performs | |
2962 | sanity checks of the addresses of FTP data connections ensure the | |
2963 | data connection is to the requested server. If you need to allow | |
2964 | FTP connections to servers using another IP address for the data | |
2965 | connection turn this off. | |
2966 | DOC_END | |
9e7dbc51 | 2967 | |
41bd17a4 | 2968 | NAME: ftp_telnet_protocol |
2969 | TYPE: onoff | |
2970 | DEFAULT: on | |
2971 | LOC: Config.Ftp.telnet | |
2972 | DOC_START | |
2973 | The FTP protocol is officially defined to use the telnet protocol | |
2974 | as transport channel for the control connection. However, many | |
2975 | implementations are broken and does not respect this aspect of | |
2976 | the FTP protocol. | |
2977 | ||
2978 | If you have trouble accessing files with ASCII code 255 in the | |
2979 | path or similar problems involving this ASCII code you can | |
2980 | try setting this directive to off. If that helps, report to the | |
2981 | operator of the FTP server in question that their FTP server | |
2982 | is broken and does not follow the FTP standard. | |
2983 | DOC_END | |
2984 | ||
2985 | COMMENT_START | |
2986 | OPTIONS FOR EXTERNAL SUPPORT PROGRAMS | |
2987 | ----------------------------------------------------------------------------- | |
2988 | COMMENT_END | |
2989 | ||
2990 | NAME: diskd_program | |
2991 | TYPE: string | |
2992 | DEFAULT: @DEFAULT_DISKD@ | |
2993 | LOC: Config.Program.diskd | |
2994 | DOC_START | |
2995 | Specify the location of the diskd executable. | |
2996 | Note this is only useful if you have compiled in | |
2997 | diskd as one of the store io modules. | |
2998 | DOC_END | |
2999 | ||
3000 | NAME: unlinkd_program | |
3001 | IFDEF: USE_UNLINKD | |
3002 | TYPE: string | |
3003 | DEFAULT: @DEFAULT_UNLINKD@ | |
3004 | LOC: Config.Program.unlinkd | |
3005 | DOC_START | |
3006 | Specify the location of the executable for file deletion process. | |
3007 | DOC_END | |
3008 | ||
3009 | NAME: pinger_program | |
3010 | TYPE: string | |
3011 | DEFAULT: @DEFAULT_PINGER@ | |
cc192b50 | 3012 | LOC: Config.pinger.program |
41bd17a4 | 3013 | IFDEF: USE_ICMP |
3014 | DOC_START | |
3015 | Specify the location of the executable for the pinger process. | |
3016 | DOC_END | |
3017 | ||
cc192b50 | 3018 | NAME: pinger_enable |
3019 | TYPE: onoff | |
3020 | DEFAULT: on | |
3021 | LOC: Config.pinger.enable | |
3022 | IFDEF: USE_ICMP | |
3023 | DOC_START | |
3024 | Control whether the pinger is active at run-time. | |
b3567eb5 FC |
3025 | Enables turning ICMP pinger on and off with a simple |
3026 | squid -k reconfigure. | |
cc192b50 | 3027 | DOC_END |
3028 | ||
3029 | ||
41bd17a4 | 3030 | COMMENT_START |
3031 | OPTIONS FOR URL REWRITING | |
3032 | ----------------------------------------------------------------------------- | |
3033 | COMMENT_END | |
3034 | ||
3035 | NAME: url_rewrite_program redirect_program | |
3036 | TYPE: wordlist | |
3037 | LOC: Config.Program.redirect | |
3038 | DEFAULT: none | |
3039 | DOC_START | |
3040 | Specify the location of the executable for the URL rewriter. | |
3041 | Since they can perform almost any function there isn't one included. | |
3042 | ||
3043 | For each requested URL rewriter will receive on line with the format | |
3044 | ||
c71adec1 | 3045 | URL <SP> client_ip "/" fqdn <SP> user <SP> method [<SP> kvpairs]<NL> |
3046 | ||
3047 | In the future, the rewriter interface will be extended with | |
3048 | key=value pairs ("kvpairs" shown above). Rewriter programs | |
3049 | should be prepared to receive and possibly ignore additional | |
3050 | whitespace-separated tokens on each input line. | |
41bd17a4 | 3051 | |
3052 | And the rewriter may return a rewritten URL. The other components of | |
3053 | the request line does not need to be returned (ignored if they are). | |
3054 | ||
3055 | The rewriter can also indicate that a client-side redirect should | |
3056 | be performed to the new URL. This is done by prefixing the returned | |
3057 | URL with "301:" (moved permanently) or 302: (moved temporarily). | |
3058 | ||
3059 | By default, a URL rewriter is not used. | |
3060 | DOC_END | |
3061 | ||
3062 | NAME: url_rewrite_children redirect_children | |
3063 | TYPE: int | |
3064 | DEFAULT: 5 | |
3065 | LOC: Config.redirectChildren | |
3066 | DOC_START | |
3067 | The number of redirector processes to spawn. If you start | |
3068 | too few Squid will have to wait for them to process a backlog of | |
3069 | URLs, slowing it down. If you start too many they will use RAM | |
3070 | and other system resources. | |
3071 | DOC_END | |
3072 | ||
3073 | NAME: url_rewrite_concurrency redirect_concurrency | |
3074 | TYPE: int | |
3075 | DEFAULT: 0 | |
3076 | LOC: Config.redirectConcurrency | |
3077 | DOC_START | |
3078 | The number of requests each redirector helper can handle in | |
3079 | parallel. Defaults to 0 which indicates the redirector | |
3080 | is a old-style single threaded redirector. | |
6a171502 AJ |
3081 | |
3082 | When this directive is set to a value >= 1 then the protocol | |
3083 | used to communicate with the helper is modified to include | |
3084 | a request ID in front of the request/response. The request | |
3085 | ID from the request must be echoed back with the response | |
3086 | to that request. | |
41bd17a4 | 3087 | DOC_END |
3088 | ||
3089 | NAME: url_rewrite_host_header redirect_rewrites_host_header | |
3090 | TYPE: onoff | |
3091 | DEFAULT: on | |
3092 | LOC: Config.onoff.redir_rewrites_host | |
3093 | DOC_START | |
3094 | By default Squid rewrites any Host: header in redirected | |
3095 | requests. If you are running an accelerator this may | |
3096 | not be a wanted effect of a redirector. | |
3097 | ||
3098 | WARNING: Entries are cached on the result of the URL rewriting | |
3099 | process, so be careful if you have domain-virtual hosts. | |
3100 | DOC_END | |
3101 | ||
3102 | NAME: url_rewrite_access redirector_access | |
3103 | TYPE: acl_access | |
3104 | DEFAULT: none | |
3105 | LOC: Config.accessList.redirector | |
3106 | DOC_START | |
3107 | If defined, this access list specifies which requests are | |
3108 | sent to the redirector processes. By default all requests | |
3109 | are sent. | |
b3567eb5 FC |
3110 | |
3111 | This clause supports both fast and slow acl types. | |
3112 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
41bd17a4 | 3113 | DOC_END |
3114 | ||
3115 | NAME: url_rewrite_bypass redirector_bypass | |
3116 | TYPE: onoff | |
3117 | LOC: Config.onoff.redirector_bypass | |
3118 | DEFAULT: off | |
3119 | DOC_START | |
3120 | When this is 'on', a request will not go through the | |
3121 | redirector if all redirectors are busy. If this is 'off' | |
3122 | and the redirector queue grows too large, Squid will exit | |
3123 | with a FATAL error and ask you to increase the number of | |
3124 | redirectors. You should only enable this if the redirectors | |
3125 | are not critical to your caching system. If you use | |
3126 | redirectors for access control, and you enable this option, | |
3127 | users may have access to pages they should not | |
3128 | be allowed to request. | |
3129 | DOC_END | |
3130 | ||
3131 | COMMENT_START | |
3132 | OPTIONS FOR TUNING THE CACHE | |
3133 | ----------------------------------------------------------------------------- | |
3134 | COMMENT_END | |
3135 | ||
f04b37d8 | 3136 | NAME: cache no_cache |
3137 | TYPE: acl_access | |
3138 | DEFAULT: none | |
3139 | LOC: Config.accessList.noCache | |
41bd17a4 | 3140 | DOC_START |
240887f0 | 3141 | A list of ACL elements which, if matched and denied, cause the request to |
f04b37d8 | 3142 | not be satisfied from the cache and the reply to not be cached. |
3143 | In other words, use this to force certain objects to never be cached. | |
41bd17a4 | 3144 | |
240887f0 | 3145 | You must use the words 'allow' or 'deny' to indicate whether items |
3146 | matching the ACL should be allowed or denied into the cache. | |
f04b37d8 | 3147 | |
240887f0 | 3148 | Default is to allow all to be cached. |
b3567eb5 FC |
3149 | |
3150 | This clause supports both fast and slow acl types. | |
3151 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
41bd17a4 | 3152 | DOC_END |
3153 | ||
3154 | NAME: refresh_pattern | |
3155 | TYPE: refreshpattern | |
3156 | LOC: Config.Refresh | |
3157 | DEFAULT: none | |
3158 | DOC_START | |
3159 | usage: refresh_pattern [-i] regex min percent max [options] | |
9e7dbc51 | 3160 | |
6b698a21 | 3161 | By default, regular expressions are CASE-SENSITIVE. To make |
3162 | them case-insensitive, use the -i option. | |
9e7dbc51 | 3163 | |
41bd17a4 | 3164 | 'Min' is the time (in minutes) an object without an explicit |
3165 | expiry time should be considered fresh. The recommended | |
3166 | value is 0, any higher values may cause dynamic applications | |
3167 | to be erroneously cached unless the application designer | |
3168 | has taken the appropriate actions. | |
9e7dbc51 | 3169 | |
41bd17a4 | 3170 | 'Percent' is a percentage of the objects age (time since last |
3171 | modification age) an object without explicit expiry time | |
3172 | will be considered fresh. | |
5b807763 | 3173 | |
41bd17a4 | 3174 | 'Max' is an upper limit on how long objects without an explicit |
3175 | expiry time will be considered fresh. | |
9e7dbc51 | 3176 | |
41bd17a4 | 3177 | options: override-expire |
3178 | override-lastmod | |
3179 | reload-into-ims | |
3180 | ignore-reload | |
3181 | ignore-no-cache | |
3182 | ignore-no-store | |
4ca08219 | 3183 | ignore-must-revalidate |
41bd17a4 | 3184 | ignore-private |
3185 | ignore-auth | |
3186 | refresh-ims | |
a0ec9f68 | 3187 | |
41bd17a4 | 3188 | override-expire enforces min age even if the server |
9b2ad080 HN |
3189 | sent an explicit expiry time (e.g., with the |
3190 | Expires: header or Cache-Control: max-age). Doing this | |
3191 | VIOLATES the HTTP standard. Enabling this feature | |
3192 | could make you liable for problems which it causes. | |
6468fe10 | 3193 | |
04925576 AJ |
3194 | Note: override-expire does not enforce staleness - it only extends |
3195 | freshness / min. If the server returns a Expires time which | |
3196 | is longer than your max time, Squid will still consider | |
3197 | the object fresh for that period of time. | |
3198 | ||
41bd17a4 | 3199 | override-lastmod enforces min age even on objects |
3200 | that were modified recently. | |
934b03fc | 3201 | |
41bd17a4 | 3202 | reload-into-ims changes client no-cache or ``reload'' |
3203 | to If-Modified-Since requests. Doing this VIOLATES the | |
3204 | HTTP standard. Enabling this feature could make you | |
3205 | liable for problems which it causes. | |
dba79ac5 | 3206 | |
41bd17a4 | 3207 | ignore-reload ignores a client no-cache or ``reload'' |
3208 | header. Doing this VIOLATES the HTTP standard. Enabling | |
3209 | this feature could make you liable for problems which | |
3210 | it causes. | |
9bc73deb | 3211 | |
41bd17a4 | 3212 | ignore-no-cache ignores any ``Pragma: no-cache'' and |
3213 | ``Cache-control: no-cache'' headers received from a server. | |
3214 | The HTTP RFC never allows the use of this (Pragma) header | |
3215 | from a server, only a client, though plenty of servers | |
3216 | send it anyway. | |
3217 | ||
3218 | ignore-no-store ignores any ``Cache-control: no-store'' | |
3219 | headers received from a server. Doing this VIOLATES | |
3220 | the HTTP standard. Enabling this feature could make you | |
3221 | liable for problems which it causes. | |
3222 | ||
4ca08219 AJ |
3223 | ignore-must-revalidate ignores any ``Cache-Control: must-revalidate`` |
3224 | headers received from a server. Doing this VIOLATES | |
3225 | the HTTP standard. Enabling this feature could make you | |
3226 | liable for problems which it causes. | |
3227 | ||
41bd17a4 | 3228 | ignore-private ignores any ``Cache-control: private'' |
3229 | headers received from a server. Doing this VIOLATES | |
3230 | the HTTP standard. Enabling this feature could make you | |
3231 | liable for problems which it causes. | |
3232 | ||
3233 | ignore-auth caches responses to requests with authorization, | |
3234 | as if the originserver had sent ``Cache-control: public'' | |
3235 | in the response header. Doing this VIOLATES the HTTP standard. | |
3236 | Enabling this feature could make you liable for problems which | |
3237 | it causes. | |
3238 | ||
3239 | refresh-ims causes squid to contact the origin server | |
3240 | when a client issues an If-Modified-Since request. This | |
3241 | ensures that the client will receive an updated version | |
3242 | if one is available. | |
3243 | ||
3244 | Basically a cached object is: | |
3245 | ||
3246 | FRESH if expires < now, else STALE | |
3247 | STALE if age > max | |
3248 | FRESH if lm-factor < percent, else STALE | |
3249 | FRESH if age < min | |
3250 | else STALE | |
3251 | ||
3252 | The refresh_pattern lines are checked in the order listed here. | |
3253 | The first entry which matches is used. If none of the entries | |
3254 | match the default will be used. | |
3255 | ||
3256 | Note, you must uncomment all the default lines if you want | |
3257 | to change one. The default setting is only active if none is | |
3258 | used. | |
3259 | ||
3260 | Suggested default: | |
3261 | NOCOMMENT_START | |
3262 | refresh_pattern ^ftp: 1440 20% 10080 | |
3263 | refresh_pattern ^gopher: 1440 0% 1440 | |
89db45fa | 3264 | refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 |
41bd17a4 | 3265 | refresh_pattern . 0 20% 4320 |
3266 | NOCOMMENT_END | |
3267 | DOC_END | |
3268 | ||
3269 | NAME: quick_abort_min | |
3270 | COMMENT: (KB) | |
3271 | TYPE: kb_int64_t | |
3272 | DEFAULT: 16 KB | |
3273 | LOC: Config.quickAbort.min | |
3274 | DOC_NONE | |
3275 | ||
3276 | NAME: quick_abort_max | |
3277 | COMMENT: (KB) | |
3278 | TYPE: kb_int64_t | |
3279 | DEFAULT: 16 KB | |
3280 | LOC: Config.quickAbort.max | |
3281 | DOC_NONE | |
3282 | ||
3283 | NAME: quick_abort_pct | |
3284 | COMMENT: (percent) | |
3285 | TYPE: int | |
3286 | DEFAULT: 95 | |
3287 | LOC: Config.quickAbort.pct | |
3288 | DOC_START | |
3289 | The cache by default continues downloading aborted requests | |
3290 | which are almost completed (less than 16 KB remaining). This | |
3291 | may be undesirable on slow (e.g. SLIP) links and/or very busy | |
3292 | caches. Impatient users may tie up file descriptors and | |
3293 | bandwidth by repeatedly requesting and immediately aborting | |
3294 | downloads. | |
3295 | ||
3296 | When the user aborts a request, Squid will check the | |
3297 | quick_abort values to the amount of data transfered until | |
3298 | then. | |
3299 | ||
3300 | If the transfer has less than 'quick_abort_min' KB remaining, | |
3301 | it will finish the retrieval. | |
3302 | ||
3303 | If the transfer has more than 'quick_abort_max' KB remaining, | |
3304 | it will abort the retrieval. | |
3305 | ||
3306 | If more than 'quick_abort_pct' of the transfer has completed, | |
3307 | it will finish the retrieval. | |
3308 | ||
3309 | If you do not want any retrieval to continue after the client | |
3310 | has aborted, set both 'quick_abort_min' and 'quick_abort_max' | |
3311 | to '0 KB'. | |
3312 | ||
3313 | If you want retrievals to always continue if they are being | |
3314 | cached set 'quick_abort_min' to '-1 KB'. | |
3315 | DOC_END | |
60d096f4 | 3316 | |
41bd17a4 | 3317 | NAME: read_ahead_gap |
3318 | COMMENT: buffer-size | |
3319 | TYPE: b_int64_t | |
3320 | LOC: Config.readAheadGap | |
3321 | DEFAULT: 16 KB | |
3322 | DOC_START | |
3323 | The amount of data the cache will buffer ahead of what has been | |
3324 | sent to the client when retrieving an object from another server. | |
3325 | DOC_END | |
53e738c6 | 3326 | |
41bd17a4 | 3327 | NAME: negative_ttl |
ac9cc053 | 3328 | IFDEF: HTTP_VIOLATIONS |
41bd17a4 | 3329 | COMMENT: time-units |
3330 | TYPE: time_t | |
3331 | LOC: Config.negativeTtl | |
ac9cc053 | 3332 | DEFAULT: 0 seconds |
41bd17a4 | 3333 | DOC_START |
ac9cc053 AJ |
3334 | Set the Default Time-to-Live (TTL) for failed requests. |
3335 | Certain types of failures (such as "connection refused" and | |
3336 | "404 Not Found") are able to be negatively-cached for a short time. | |
3337 | Modern web servers should provide Expires: header, however if they | |
3338 | do not this can provide a minimum TTL. | |
3339 | The default is not to cache errors with unknown expiry details. | |
3340 | ||
3341 | Note that this is different from negative caching of DNS lookups. | |
39956c7c AJ |
3342 | |
3343 | WARNING: Doing this VIOLATES the HTTP standard. Enabling | |
3344 | this feature could make you liable for problems which it | |
3345 | causes. | |
41bd17a4 | 3346 | DOC_END |
53e738c6 | 3347 | |
41bd17a4 | 3348 | NAME: positive_dns_ttl |
3349 | COMMENT: time-units | |
3350 | TYPE: time_t | |
3351 | LOC: Config.positiveDnsTtl | |
3352 | DEFAULT: 6 hours | |
3353 | DOC_START | |
3354 | Upper limit on how long Squid will cache positive DNS responses. | |
3355 | Default is 6 hours (360 minutes). This directive must be set | |
3356 | larger than negative_dns_ttl. | |
3357 | DOC_END | |
c4ab8329 | 3358 | |
41bd17a4 | 3359 | NAME: negative_dns_ttl |
3360 | COMMENT: time-units | |
3361 | TYPE: time_t | |
3362 | LOC: Config.negativeDnsTtl | |
3363 | DEFAULT: 1 minutes | |
3364 | DOC_START | |
3365 | Time-to-Live (TTL) for negative caching of failed DNS lookups. | |
3366 | This also sets the lower cache limit on positive lookups. | |
3367 | Minimum value is 1 second, and it is not recommendable to go | |
3368 | much below 10 seconds. | |
3369 | DOC_END | |
7df0bfd7 | 3370 | |
41bd17a4 | 3371 | NAME: range_offset_limit |
3372 | COMMENT: (bytes) | |
3373 | TYPE: b_int64_t | |
3374 | LOC: Config.rangeOffsetLimit | |
3375 | DEFAULT: 0 KB | |
3376 | DOC_START | |
3377 | Sets a upper limit on how far into the the file a Range request | |
3378 | may be to cause Squid to prefetch the whole file. If beyond this | |
3379 | limit Squid forwards the Range request as it is and the result | |
3380 | is NOT cached. | |
c4ab8329 | 3381 | |
41bd17a4 | 3382 | This is to stop a far ahead range request (lets say start at 17MB) |
3383 | from making Squid fetch the whole object up to that point before | |
3384 | sending anything to the client. | |
a7ad6e4e | 3385 | |
ab275c7b AJ |
3386 | A value of 0 causes Squid to never fetch more than the |
3387 | client requested. (default) | |
3388 | ||
41bd17a4 | 3389 | A value of -1 causes Squid to always fetch the object from the |
3390 | beginning so it may cache the result. (2.0 style) | |
a7ad6e4e | 3391 | |
ab275c7b AJ |
3392 | NP: Using -1 here will override any quick_abort settings that may |
3393 | otherwise apply to the range request. The range request will | |
3394 | be fully fetched from start to finish regardless of the client | |
3395 | actions. This affects bandwidth usage. | |
41bd17a4 | 3396 | DOC_END |
d95b862f | 3397 | |
41bd17a4 | 3398 | NAME: minimum_expiry_time |
3399 | COMMENT: (seconds) | |
3400 | TYPE: time_t | |
3401 | LOC: Config.minimum_expiry_time | |
3402 | DEFAULT: 60 seconds | |
3403 | DOC_START | |
3404 | The minimum caching time according to (Expires - Date) | |
3405 | Headers Squid honors if the object can't be revalidated | |
649fa918 | 3406 | defaults to 60 seconds. In reverse proxy environments it |
41bd17a4 | 3407 | might be desirable to honor shorter object lifetimes. It |
3408 | is most likely better to make your server return a | |
3409 | meaningful Last-Modified header however. In ESI environments | |
3410 | where page fragments often have short lifetimes, this will | |
3411 | often be best set to 0. | |
3412 | DOC_END | |
c68e9c6b | 3413 | |
41bd17a4 | 3414 | NAME: store_avg_object_size |
3415 | COMMENT: (kbytes) | |
3e62bd58 | 3416 | TYPE: kb_int64_t |
41bd17a4 | 3417 | DEFAULT: 13 KB |
3418 | LOC: Config.Store.avgObjectSize | |
3419 | DOC_START | |
3420 | Average object size, used to estimate number of objects your | |
3421 | cache can hold. The default is 13 KB. | |
cccac0a2 | 3422 | DOC_END |
3423 | ||
41bd17a4 | 3424 | NAME: store_objects_per_bucket |
3425 | TYPE: int | |
3426 | DEFAULT: 20 | |
3427 | LOC: Config.Store.objectsPerBucket | |
3428 | DOC_START | |
3429 | Target number of objects per bucket in the store hash table. | |
3430 | Lowering this value increases the total number of buckets and | |
3431 | also the storage maintenance rate. The default is 20. | |
3432 | DOC_END | |
3433 | ||
3434 | COMMENT_START | |
3435 | HTTP OPTIONS | |
3436 | ----------------------------------------------------------------------------- | |
3437 | COMMENT_END | |
3438 | ||
f04b37d8 | 3439 | NAME: request_header_max_size |
3440 | COMMENT: (KB) | |
3441 | TYPE: b_size_t | |
df2eec10 | 3442 | DEFAULT: 64 KB |
f04b37d8 | 3443 | LOC: Config.maxRequestHeaderSize |
3444 | DOC_START | |
3445 | This specifies the maximum size for HTTP headers in a request. | |
3446 | Request headers are usually relatively small (about 512 bytes). | |
3447 | Placing a limit on the request header size will catch certain | |
3448 | bugs (for example with persistent connections) and possibly | |
3449 | buffer-overflow or denial-of-service attacks. | |
3450 | DOC_END | |
3451 | ||
3452 | NAME: reply_header_max_size | |
3453 | COMMENT: (KB) | |
3454 | TYPE: b_size_t | |
df2eec10 | 3455 | DEFAULT: 64 KB |
f04b37d8 | 3456 | LOC: Config.maxReplyHeaderSize |
3457 | DOC_START | |
3458 | This specifies the maximum size for HTTP headers in a reply. | |
3459 | Reply headers are usually relatively small (about 512 bytes). | |
3460 | Placing a limit on the reply header size will catch certain | |
3461 | bugs (for example with persistent connections) and possibly | |
3462 | buffer-overflow or denial-of-service attacks. | |
3463 | DOC_END | |
3464 | ||
3465 | NAME: request_body_max_size | |
3466 | COMMENT: (bytes) | |
3467 | TYPE: b_int64_t | |
3468 | DEFAULT: 0 KB | |
3469 | LOC: Config.maxRequestBodySize | |
3470 | DOC_START | |
3471 | This specifies the maximum size for an HTTP request body. | |
3472 | In other words, the maximum size of a PUT/POST request. | |
3473 | A user who attempts to send a request with a body larger | |
3474 | than this limit receives an "Invalid Request" error message. | |
3475 | If you set this parameter to a zero (the default), there will | |
3476 | be no limit imposed. | |
3477 | DOC_END | |
3478 | ||
3ff65596 AR |
3479 | NAME: chunked_request_body_max_size |
3480 | COMMENT: (bytes) | |
3481 | TYPE: b_int64_t | |
3482 | DEFAULT: 64 KB | |
3483 | LOC: Config.maxChunkedRequestBodySize | |
3484 | DOC_START | |
3485 | A broken or confused HTTP/1.1 client may send a chunked HTTP | |
3486 | request to Squid. Squid does not have full support for that | |
3487 | feature yet. To cope with such requests, Squid buffers the | |
3488 | entire request and then dechunks request body to create a | |
3489 | plain HTTP/1.0 request with a known content length. The plain | |
3490 | request is then used by the rest of Squid code as usual. | |
3491 | ||
3492 | The option value specifies the maximum size of the buffer used | |
3493 | to hold the request before the conversion. If the chunked | |
3494 | request size exceeds the specified limit, the conversion | |
3495 | fails, and the client receives an "unsupported request" error, | |
3496 | as if dechunking was disabled. | |
3497 | ||
3498 | Dechunking is enabled by default. To disable conversion of | |
3499 | chunked requests, set the maximum to zero. | |
3500 | ||
3501 | Request dechunking feature and this option in particular are a | |
3502 | temporary hack. When chunking requests and responses are fully | |
3503 | supported, there will be no need to buffer a chunked request. | |
3504 | DOC_END | |
3505 | ||
41bd17a4 | 3506 | NAME: broken_posts |
aa49962c | 3507 | IFDEF: HTTP_VIOLATIONS |
cccac0a2 | 3508 | TYPE: acl_access |
cccac0a2 | 3509 | DEFAULT: none |
41bd17a4 | 3510 | LOC: Config.accessList.brokenPosts |
cccac0a2 | 3511 | DOC_START |
41bd17a4 | 3512 | A list of ACL elements which, if matched, causes Squid to send |
3513 | an extra CRLF pair after the body of a PUT/POST request. | |
cccac0a2 | 3514 | |
41bd17a4 | 3515 | Some HTTP servers has broken implementations of PUT/POST, |
3516 | and rely on an extra CRLF pair sent by some WWW clients. | |
cccac0a2 | 3517 | |
41bd17a4 | 3518 | Quote from RFC2616 section 4.1 on this matter: |
cccac0a2 | 3519 | |
41bd17a4 | 3520 | Note: certain buggy HTTP/1.0 client implementations generate an |
3521 | extra CRLF's after a POST request. To restate what is explicitly | |
3522 | forbidden by the BNF, an HTTP/1.1 client must not preface or follow | |
3523 | a request with an extra CRLF. | |
cccac0a2 | 3524 | |
b3567eb5 FC |
3525 | This clause only supports fast acl types. |
3526 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
3527 | ||
41bd17a4 | 3528 | Example: |
3529 | acl buggy_server url_regex ^http://.... | |
3530 | broken_posts allow buggy_server | |
3531 | DOC_END | |
cccac0a2 | 3532 | |
41bd17a4 | 3533 | NAME: via |
3534 | IFDEF: HTTP_VIOLATIONS | |
3535 | COMMENT: on|off | |
3536 | TYPE: onoff | |
3537 | DEFAULT: on | |
3538 | LOC: Config.onoff.via | |
3539 | DOC_START | |
3540 | If set (default), Squid will include a Via header in requests and | |
3541 | replies as required by RFC2616. | |
3542 | DOC_END | |
4cc6eb12 | 3543 | |
41bd17a4 | 3544 | NAME: ie_refresh |
3545 | COMMENT: on|off | |
3546 | TYPE: onoff | |
3547 | LOC: Config.onoff.ie_refresh | |
3548 | DEFAULT: off | |
3549 | DOC_START | |
3550 | Microsoft Internet Explorer up until version 5.5 Service | |
3551 | Pack 1 has an issue with transparent proxies, wherein it | |
3552 | is impossible to force a refresh. Turning this on provides | |
3553 | a partial fix to the problem, by causing all IMS-REFRESH | |
3554 | requests from older IE versions to check the origin server | |
3555 | for fresh content. This reduces hit ratio by some amount | |
3556 | (~10% in my experience), but allows users to actually get | |
3557 | fresh content when they want it. Note because Squid | |
3558 | cannot tell if the user is using 5.5 or 5.5SP1, the behavior | |
3559 | of 5.5 is unchanged from old versions of Squid (i.e. a | |
3560 | forced refresh is impossible). Newer versions of IE will, | |
3561 | hopefully, continue to have the new behavior and will be | |
3562 | handled based on that assumption. This option defaults to | |
3563 | the old Squid behavior, which is better for hit ratios but | |
3564 | worse for clients using IE, if they need to be able to | |
3565 | force fresh content. | |
3566 | DOC_END | |
b9d7fe3e | 3567 | |
41bd17a4 | 3568 | NAME: vary_ignore_expire |
3569 | COMMENT: on|off | |
3570 | TYPE: onoff | |
3571 | LOC: Config.onoff.vary_ignore_expire | |
3572 | DEFAULT: off | |
3573 | DOC_START | |
3574 | Many HTTP servers supporting Vary gives such objects | |
3575 | immediate expiry time with no cache-control header | |
3576 | when requested by a HTTP/1.0 client. This option | |
3577 | enables Squid to ignore such expiry times until | |
3578 | HTTP/1.1 is fully implemented. | |
7e73cd78 AJ |
3579 | |
3580 | WARNING: If turned on this may eventually cause some | |
3581 | varying objects not intended for caching to get cached. | |
cccac0a2 | 3582 | DOC_END |
c4ab8329 | 3583 | |
41bd17a4 | 3584 | NAME: request_entities |
3585 | TYPE: onoff | |
3586 | LOC: Config.onoff.request_entities | |
3587 | DEFAULT: off | |
3588 | DOC_START | |
3589 | Squid defaults to deny GET and HEAD requests with request entities, | |
3590 | as the meaning of such requests are undefined in the HTTP standard | |
3591 | even if not explicitly forbidden. | |
0976f8db | 3592 | |
41bd17a4 | 3593 | Set this directive to on if you have clients which insists |
3594 | on sending request entities in GET or HEAD requests. But be warned | |
3595 | that there is server software (both proxies and web servers) which | |
3596 | can fail to properly process this kind of request which may make you | |
3597 | vulnerable to cache pollution attacks if enabled. | |
cccac0a2 | 3598 | DOC_END |
6b53c392 | 3599 | |
41bd17a4 | 3600 | NAME: request_header_access |
3601 | IFDEF: HTTP_VIOLATIONS | |
3602 | TYPE: http_header_access[] | |
3603 | LOC: Config.request_header_access | |
cccac0a2 | 3604 | DEFAULT: none |
cccac0a2 | 3605 | DOC_START |
41bd17a4 | 3606 | Usage: request_header_access header_name allow|deny [!]aclname ... |
0976f8db | 3607 | |
41bd17a4 | 3608 | WARNING: Doing this VIOLATES the HTTP standard. Enabling |
3609 | this feature could make you liable for problems which it | |
3610 | causes. | |
0976f8db | 3611 | |
41bd17a4 | 3612 | This option replaces the old 'anonymize_headers' and the |
3613 | older 'http_anonymizer' option with something that is much | |
3614 | more configurable. This new method creates a list of ACLs | |
3615 | for each header, allowing you very fine-tuned header | |
3616 | mangling. | |
934b03fc | 3617 | |
41bd17a4 | 3618 | This option only applies to request headers, i.e., from the |
3619 | client to the server. | |
5401aa8d | 3620 | |
41bd17a4 | 3621 | You can only specify known headers for the header name. |
3622 | Other headers are reclassified as 'Other'. You can also | |
3623 | refer to all the headers with 'All'. | |
5401aa8d | 3624 | |
41bd17a4 | 3625 | For example, to achieve the same behavior as the old |
3626 | 'http_anonymizer standard' option, you should use: | |
5401aa8d | 3627 | |
41bd17a4 | 3628 | request_header_access From deny all |
3629 | request_header_access Referer deny all | |
3630 | request_header_access Server deny all | |
3631 | request_header_access User-Agent deny all | |
3632 | request_header_access WWW-Authenticate deny all | |
3633 | request_header_access Link deny all | |
5401aa8d | 3634 | |
41bd17a4 | 3635 | Or, to reproduce the old 'http_anonymizer paranoid' feature |
3636 | you should use: | |
5401aa8d | 3637 | |
41bd17a4 | 3638 | request_header_access Allow allow all |
3639 | request_header_access Authorization allow all | |
3640 | request_header_access WWW-Authenticate allow all | |
3641 | request_header_access Proxy-Authorization allow all | |
3642 | request_header_access Proxy-Authenticate allow all | |
3643 | request_header_access Cache-Control allow all | |
3644 | request_header_access Content-Encoding allow all | |
3645 | request_header_access Content-Length allow all | |
3646 | request_header_access Content-Type allow all | |
3647 | request_header_access Date allow all | |
3648 | request_header_access Expires allow all | |
3649 | request_header_access Host allow all | |
3650 | request_header_access If-Modified-Since allow all | |
3651 | request_header_access Last-Modified allow all | |
3652 | request_header_access Location allow all | |
3653 | request_header_access Pragma allow all | |
3654 | request_header_access Accept allow all | |
3655 | request_header_access Accept-Charset allow all | |
3656 | request_header_access Accept-Encoding allow all | |
3657 | request_header_access Accept-Language allow all | |
3658 | request_header_access Content-Language allow all | |
3659 | request_header_access Mime-Version allow all | |
3660 | request_header_access Retry-After allow all | |
3661 | request_header_access Title allow all | |
3662 | request_header_access Connection allow all | |
3663 | request_header_access Proxy-Connection allow all | |
3664 | request_header_access All deny all | |
5401aa8d | 3665 | |
41bd17a4 | 3666 | although many of those are HTTP reply headers, and so should be |
3667 | controlled with the reply_header_access directive. | |
5401aa8d | 3668 | |
41bd17a4 | 3669 | By default, all headers are allowed (no anonymizing is |
3670 | performed). | |
5401aa8d | 3671 | DOC_END |
3672 | ||
41bd17a4 | 3673 | NAME: reply_header_access |
3674 | IFDEF: HTTP_VIOLATIONS | |
3675 | TYPE: http_header_access[] | |
3676 | LOC: Config.reply_header_access | |
cccac0a2 | 3677 | DEFAULT: none |
3678 | DOC_START | |
41bd17a4 | 3679 | Usage: reply_header_access header_name allow|deny [!]aclname ... |
934b03fc | 3680 | |
41bd17a4 | 3681 | WARNING: Doing this VIOLATES the HTTP standard. Enabling |
3682 | this feature could make you liable for problems which it | |
3683 | causes. | |
934b03fc | 3684 | |
41bd17a4 | 3685 | This option only applies to reply headers, i.e., from the |
3686 | server to the client. | |
934b03fc | 3687 | |
41bd17a4 | 3688 | This is the same as request_header_access, but in the other |
3689 | direction. | |
6b53c392 | 3690 | |
41bd17a4 | 3691 | This option replaces the old 'anonymize_headers' and the |
3692 | older 'http_anonymizer' option with something that is much | |
3693 | more configurable. This new method creates a list of ACLs | |
3694 | for each header, allowing you very fine-tuned header | |
3695 | mangling. | |
cccac0a2 | 3696 | |
41bd17a4 | 3697 | You can only specify known headers for the header name. |
3698 | Other headers are reclassified as 'Other'. You can also | |
3699 | refer to all the headers with 'All'. | |
cccac0a2 | 3700 | |
41bd17a4 | 3701 | For example, to achieve the same behavior as the old |
3702 | 'http_anonymizer standard' option, you should use: | |
cccac0a2 | 3703 | |
41bd17a4 | 3704 | reply_header_access From deny all |
3705 | reply_header_access Referer deny all | |
3706 | reply_header_access Server deny all | |
3707 | reply_header_access User-Agent deny all | |
3708 | reply_header_access WWW-Authenticate deny all | |
3709 | reply_header_access Link deny all | |
cccac0a2 | 3710 | |
41bd17a4 | 3711 | Or, to reproduce the old 'http_anonymizer paranoid' feature |
3712 | you should use: | |
cccac0a2 | 3713 | |
41bd17a4 | 3714 | reply_header_access Allow allow all |
3715 | reply_header_access Authorization allow all | |
3716 | reply_header_access WWW-Authenticate allow all | |
3717 | reply_header_access Proxy-Authorization allow all | |
3718 | reply_header_access Proxy-Authenticate allow all | |
3719 | reply_header_access Cache-Control allow all | |
3720 | reply_header_access Content-Encoding allow all | |
3721 | reply_header_access Content-Length allow all | |
3722 | reply_header_access Content-Type allow all | |
3723 | reply_header_access Date allow all | |
3724 | reply_header_access Expires allow all | |
3725 | reply_header_access Host allow all | |
3726 | reply_header_access If-Modified-Since allow all | |
3727 | reply_header_access Last-Modified allow all | |
3728 | reply_header_access Location allow all | |
3729 | reply_header_access Pragma allow all | |
3730 | reply_header_access Accept allow all | |
3731 | reply_header_access Accept-Charset allow all | |
3732 | reply_header_access Accept-Encoding allow all | |
3733 | reply_header_access Accept-Language allow all | |
3734 | reply_header_access Content-Language allow all | |
3735 | reply_header_access Mime-Version allow all | |
3736 | reply_header_access Retry-After allow all | |
3737 | reply_header_access Title allow all | |
3738 | reply_header_access Connection allow all | |
3739 | reply_header_access Proxy-Connection allow all | |
3740 | reply_header_access All deny all | |
cccac0a2 | 3741 | |
41bd17a4 | 3742 | although the HTTP request headers won't be usefully controlled |
3743 | by this directive -- see request_header_access for details. | |
cccac0a2 | 3744 | |
41bd17a4 | 3745 | By default, all headers are allowed (no anonymizing is |
3746 | performed). | |
cccac0a2 | 3747 | DOC_END |
3748 | ||
41bd17a4 | 3749 | NAME: header_replace |
3750 | IFDEF: HTTP_VIOLATIONS | |
3751 | TYPE: http_header_replace[] | |
3752 | LOC: Config.request_header_access | |
cccac0a2 | 3753 | DEFAULT: none |
41bd17a4 | 3754 | DOC_START |
3755 | Usage: header_replace header_name message | |
3756 | Example: header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit) | |
cccac0a2 | 3757 | |
41bd17a4 | 3758 | This option allows you to change the contents of headers |
3759 | denied with header_access above, by replacing them with | |
3760 | some fixed string. This replaces the old fake_user_agent | |
3761 | option. | |
cccac0a2 | 3762 | |
41bd17a4 | 3763 | This only applies to request headers, not reply headers. |
cccac0a2 | 3764 | |
41bd17a4 | 3765 | By default, headers are removed if denied. |
3766 | DOC_END | |
cccac0a2 | 3767 | |
41bd17a4 | 3768 | NAME: relaxed_header_parser |
3769 | COMMENT: on|off|warn | |
3770 | TYPE: tristate | |
3771 | LOC: Config.onoff.relaxed_header_parser | |
3772 | DEFAULT: on | |
3773 | DOC_START | |
3774 | In the default "on" setting Squid accepts certain forms | |
3775 | of non-compliant HTTP messages where it is unambiguous | |
3776 | what the sending application intended even if the message | |
3777 | is not correctly formatted. The messages is then normalized | |
3778 | to the correct form when forwarded by Squid. | |
cccac0a2 | 3779 | |
41bd17a4 | 3780 | If set to "warn" then a warning will be emitted in cache.log |
3781 | each time such HTTP error is encountered. | |
cccac0a2 | 3782 | |
41bd17a4 | 3783 | If set to "off" then such HTTP errors will cause the request |
3784 | or response to be rejected. | |
3785 | DOC_END | |
7d90757b | 3786 | |
41bd17a4 | 3787 | COMMENT_START |
3788 | TIMEOUTS | |
3789 | ----------------------------------------------------------------------------- | |
3790 | COMMENT_END | |
3791 | ||
3792 | NAME: forward_timeout | |
3793 | COMMENT: time-units | |
3794 | TYPE: time_t | |
3795 | LOC: Config.Timeout.forward | |
3796 | DEFAULT: 4 minutes | |
3797 | DOC_START | |
3798 | This parameter specifies how long Squid should at most attempt in | |
3799 | finding a forwarding path for the request before giving up. | |
cccac0a2 | 3800 | DOC_END |
3801 | ||
41bd17a4 | 3802 | NAME: connect_timeout |
3803 | COMMENT: time-units | |
3804 | TYPE: time_t | |
3805 | LOC: Config.Timeout.connect | |
3806 | DEFAULT: 1 minute | |
057f5854 | 3807 | DOC_START |
41bd17a4 | 3808 | This parameter specifies how long to wait for the TCP connect to |
3809 | the requested server or peer to complete before Squid should | |
3810 | attempt to find another path where to forward the request. | |
057f5854 | 3811 | DOC_END |
3812 | ||
41bd17a4 | 3813 | NAME: peer_connect_timeout |
3814 | COMMENT: time-units | |
3815 | TYPE: time_t | |
3816 | LOC: Config.Timeout.peer_connect | |
3817 | DEFAULT: 30 seconds | |
cccac0a2 | 3818 | DOC_START |
41bd17a4 | 3819 | This parameter specifies how long to wait for a pending TCP |
3820 | connection to a peer cache. The default is 30 seconds. You | |
3821 | may also set different timeout values for individual neighbors | |
3822 | with the 'connect-timeout' option on a 'cache_peer' line. | |
3823 | DOC_END | |
7f7db318 | 3824 | |
41bd17a4 | 3825 | NAME: read_timeout |
3826 | COMMENT: time-units | |
3827 | TYPE: time_t | |
3828 | LOC: Config.Timeout.read | |
3829 | DEFAULT: 15 minutes | |
3830 | DOC_START | |
3831 | The read_timeout is applied on server-side connections. After | |
3832 | each successful read(), the timeout will be extended by this | |
3833 | amount. If no data is read again after this amount of time, | |
3834 | the request is aborted and logged with ERR_READ_TIMEOUT. The | |
3835 | default is 15 minutes. | |
3836 | DOC_END | |
cccac0a2 | 3837 | |
41bd17a4 | 3838 | NAME: request_timeout |
3839 | TYPE: time_t | |
3840 | LOC: Config.Timeout.request | |
3841 | DEFAULT: 5 minutes | |
3842 | DOC_START | |
3843 | How long to wait for an HTTP request after initial | |
3844 | connection establishment. | |
3845 | DOC_END | |
cccac0a2 | 3846 | |
41bd17a4 | 3847 | NAME: persistent_request_timeout |
3848 | TYPE: time_t | |
3849 | LOC: Config.Timeout.persistent_request | |
3850 | DEFAULT: 2 minutes | |
3851 | DOC_START | |
3852 | How long to wait for the next HTTP request on a persistent | |
3853 | connection after the previous request completes. | |
3854 | DOC_END | |
cccac0a2 | 3855 | |
41bd17a4 | 3856 | NAME: client_lifetime |
3857 | COMMENT: time-units | |
3858 | TYPE: time_t | |
3859 | LOC: Config.Timeout.lifetime | |
3860 | DEFAULT: 1 day | |
3861 | DOC_START | |
3862 | The maximum amount of time a client (browser) is allowed to | |
3863 | remain connected to the cache process. This protects the Cache | |
3864 | from having a lot of sockets (and hence file descriptors) tied up | |
3865 | in a CLOSE_WAIT state from remote clients that go away without | |
3866 | properly shutting down (either because of a network failure or | |
3867 | because of a poor client implementation). The default is one | |
3868 | day, 1440 minutes. | |
7d90757b | 3869 | |
41bd17a4 | 3870 | NOTE: The default value is intended to be much larger than any |
3871 | client would ever need to be connected to your cache. You | |
3872 | should probably change client_lifetime only as a last resort. | |
3873 | If you seem to have many client connections tying up | |
3874 | filedescriptors, we recommend first tuning the read_timeout, | |
3875 | request_timeout, persistent_request_timeout and quick_abort values. | |
cccac0a2 | 3876 | DOC_END |
3877 | ||
41bd17a4 | 3878 | NAME: half_closed_clients |
3879 | TYPE: onoff | |
3880 | LOC: Config.onoff.half_closed_clients | |
0c2f5c4f | 3881 | DEFAULT: off |
4eb368f9 | 3882 | DOC_START |
41bd17a4 | 3883 | Some clients may shutdown the sending side of their TCP |
3884 | connections, while leaving their receiving sides open. Sometimes, | |
3885 | Squid can not tell the difference between a half-closed and a | |
0c2f5c4f AJ |
3886 | fully-closed TCP connection. |
3887 | ||
3888 | By default, Squid will immediately close client connections when | |
3889 | read(2) returns "no more data to read." | |
3890 | ||
abdf1651 | 3891 | Change this option to 'on' and Squid will keep open connections |
0c2f5c4f AJ |
3892 | until a read(2) or write(2) on the socket returns an error. |
3893 | This may show some benefits for reverse proxies. But if not | |
3894 | it is recommended to leave OFF. | |
4eb368f9 | 3895 | DOC_END |
3896 | ||
41bd17a4 | 3897 | NAME: pconn_timeout |
3898 | TYPE: time_t | |
3899 | LOC: Config.Timeout.pconn | |
3900 | DEFAULT: 1 minute | |
cccac0a2 | 3901 | DOC_START |
41bd17a4 | 3902 | Timeout for idle persistent connections to servers and other |
3903 | proxies. | |
3904 | DOC_END | |
cccac0a2 | 3905 | |
41bd17a4 | 3906 | NAME: ident_timeout |
3907 | TYPE: time_t | |
3908 | IFDEF: USE_IDENT | |
4daaf3cb | 3909 | LOC: Ident::TheConfig.timeout |
41bd17a4 | 3910 | DEFAULT: 10 seconds |
3911 | DOC_START | |
3912 | Maximum time to wait for IDENT lookups to complete. | |
cccac0a2 | 3913 | |
41bd17a4 | 3914 | If this is too high, and you enabled IDENT lookups from untrusted |
3915 | users, you might be susceptible to denial-of-service by having | |
3916 | many ident requests going at once. | |
cccac0a2 | 3917 | DOC_END |
3918 | ||
41bd17a4 | 3919 | NAME: shutdown_lifetime |
3920 | COMMENT: time-units | |
3921 | TYPE: time_t | |
3922 | LOC: Config.shutdownLifetime | |
3923 | DEFAULT: 30 seconds | |
cccac0a2 | 3924 | DOC_START |
41bd17a4 | 3925 | When SIGTERM or SIGHUP is received, the cache is put into |
3926 | "shutdown pending" mode until all active sockets are closed. | |
3927 | This value is the lifetime to set for all open descriptors | |
3928 | during shutdown mode. Any active clients after this many | |
3929 | seconds will receive a 'timeout' message. | |
cccac0a2 | 3930 | DOC_END |
0976f8db | 3931 | |
cccac0a2 | 3932 | COMMENT_START |
3933 | ADMINISTRATIVE PARAMETERS | |
3934 | ----------------------------------------------------------------------------- | |
3935 | COMMENT_END | |
3936 | ||
3937 | NAME: cache_mgr | |
3938 | TYPE: string | |
3939 | DEFAULT: webmaster | |
3940 | LOC: Config.adminEmail | |
3941 | DOC_START | |
3942 | Email-address of local cache manager who will receive | |
3943 | mail if the cache dies. The default is "webmaster." | |
3944 | DOC_END | |
3945 | ||
abacf776 | 3946 | NAME: mail_from |
3947 | TYPE: string | |
3948 | DEFAULT: none | |
3949 | LOC: Config.EmailFrom | |
3950 | DOC_START | |
3951 | From: email-address for mail sent when the cache dies. | |
3952 | The default is to use 'appname@unique_hostname'. | |
b8c0c06d | 3953 | Default appname value is "squid", can be changed into |
abacf776 | 3954 | src/globals.h before building squid. |
3955 | DOC_END | |
3956 | ||
d084bf20 | 3957 | NAME: mail_program |
3958 | TYPE: eol | |
3959 | DEFAULT: mail | |
3960 | LOC: Config.EmailProgram | |
3961 | DOC_START | |
3962 | Email program used to send mail if the cache dies. | |
846a5e31 | 3963 | The default is "mail". The specified program must comply |
d084bf20 | 3964 | with the standard Unix mail syntax: |
846a5e31 | 3965 | mail-program recipient < mailfile |
3966 | ||
d084bf20 | 3967 | Optional command line options can be specified. |
3968 | DOC_END | |
3969 | ||
cccac0a2 | 3970 | NAME: cache_effective_user |
3971 | TYPE: string | |
5483d916 | 3972 | DEFAULT: @DEFAULT_CACHE_EFFECTIVE_USER@ |
cccac0a2 | 3973 | LOC: Config.effectiveUser |
e3d74828 | 3974 | DOC_START |
3975 | If you start Squid as root, it will change its effective/real | |
3976 | UID/GID to the user specified below. The default is to change | |
5483d916 | 3977 | to UID of @DEFAULT_CACHE_EFFECTIVE_USER@. |
64e288bd | 3978 | see also; cache_effective_group |
e3d74828 | 3979 | DOC_END |
3980 | ||
cccac0a2 | 3981 | NAME: cache_effective_group |
3982 | TYPE: string | |
3983 | DEFAULT: none | |
3984 | LOC: Config.effectiveGroup | |
3985 | DOC_START | |
64e288bd | 3986 | Squid sets the GID to the effective user's default group ID |
3987 | (taken from the password file) and supplementary group list | |
3988 | from the groups membership. | |
3989 | ||
e3d74828 | 3990 | If you want Squid to run with a specific GID regardless of |
3991 | the group memberships of the effective user then set this | |
3992 | to the group (or GID) you want Squid to run as. When set | |
64e288bd | 3993 | all other group privileges of the effective user are ignored |
e3d74828 | 3994 | and only this GID is effective. If Squid is not started as |
64e288bd | 3995 | root the user starting Squid MUST be member of the specified |
e3d74828 | 3996 | group. |
64e288bd | 3997 | |
3998 | This option is not recommended by the Squid Team. | |
3999 | Our preference is for administrators to configure a secure | |
4000 | user account for squid with UID/GID matching system policies. | |
cccac0a2 | 4001 | DOC_END |
4002 | ||
d3caee79 | 4003 | NAME: httpd_suppress_version_string |
4004 | COMMENT: on|off | |
4005 | TYPE: onoff | |
4006 | DEFAULT: off | |
4007 | LOC: Config.onoff.httpd_suppress_version_string | |
4008 | DOC_START | |
4009 | Suppress Squid version string info in HTTP headers and HTML error pages. | |
4010 | DOC_END | |
4011 | ||
cccac0a2 | 4012 | NAME: visible_hostname |
4013 | TYPE: string | |
4014 | LOC: Config.visibleHostname | |
4015 | DEFAULT: none | |
4016 | DOC_START | |
4017 | If you want to present a special hostname in error messages, etc, | |
7f7db318 | 4018 | define this. Otherwise, the return value of gethostname() |
cccac0a2 | 4019 | will be used. If you have multiple caches in a cluster and |
4020 | get errors about IP-forwarding you must set them to have individual | |
4021 | names with this setting. | |
4022 | DOC_END | |
4023 | ||
cccac0a2 | 4024 | NAME: unique_hostname |
4025 | TYPE: string | |
4026 | LOC: Config.uniqueHostname | |
4027 | DEFAULT: none | |
4028 | DOC_START | |
4029 | If you want to have multiple machines with the same | |
7f7db318 | 4030 | 'visible_hostname' you must give each machine a different |
4031 | 'unique_hostname' so forwarding loops can be detected. | |
cccac0a2 | 4032 | DOC_END |
4033 | ||
cccac0a2 | 4034 | NAME: hostname_aliases |
4035 | TYPE: wordlist | |
4036 | LOC: Config.hostnameAliases | |
4037 | DEFAULT: none | |
4038 | DOC_START | |
7f7db318 | 4039 | A list of other DNS names your cache has. |
cccac0a2 | 4040 | DOC_END |
0976f8db | 4041 | |
c642c141 AJ |
4042 | NAME: umask |
4043 | TYPE: int | |
4044 | LOC: Config.umask | |
4045 | DEFAULT: 027 | |
4046 | DOC_START | |
4047 | Minimum umask which should be enforced while the proxy | |
4048 | is running, in addition to the umask set at startup. | |
4049 | ||
4050 | For a traditional octal representation of umasks, start | |
4051 | your value with 0. | |
4052 | DOC_END | |
4053 | ||
cccac0a2 | 4054 | COMMENT_START |
4055 | OPTIONS FOR THE CACHE REGISTRATION SERVICE | |
4056 | ----------------------------------------------------------------------------- | |
4057 | ||
4058 | This section contains parameters for the (optional) cache | |
4059 | announcement service. This service is provided to help | |
4060 | cache administrators locate one another in order to join or | |
4061 | create cache hierarchies. | |
4062 | ||
4063 | An 'announcement' message is sent (via UDP) to the registration | |
4064 | service by Squid. By default, the announcement message is NOT | |
4065 | SENT unless you enable it with 'announce_period' below. | |
4066 | ||
4067 | The announcement message includes your hostname, plus the | |
4068 | following information from this configuration file: | |
4069 | ||
4070 | http_port | |
4071 | icp_port | |
4072 | cache_mgr | |
4073 | ||
4074 | All current information is processed regularly and made | |
4075 | available on the Web at http://www.ircache.net/Cache/Tracker/. | |
4076 | COMMENT_END | |
4077 | ||
4078 | NAME: announce_period | |
4079 | TYPE: time_t | |
4080 | LOC: Config.Announce.period | |
4081 | DEFAULT: 0 | |
4082 | DOC_START | |
4083 | This is how frequently to send cache announcements. The | |
4084 | default is `0' which disables sending the announcement | |
4085 | messages. | |
4086 | ||
4087 | To enable announcing your cache, just uncomment the line | |
4088 | below. | |
4089 | ||
4090 | NOCOMMENT_START | |
9e7dbc51 | 4091 | #To enable announcing your cache, just uncomment the line below. |
4092 | #announce_period 1 day | |
cccac0a2 | 4093 | NOCOMMENT_END |
4094 | DOC_END | |
4095 | ||
cccac0a2 | 4096 | NAME: announce_host |
4097 | TYPE: string | |
4098 | DEFAULT: tracker.ircache.net | |
4099 | LOC: Config.Announce.host | |
4100 | DOC_NONE | |
4101 | ||
4102 | NAME: announce_file | |
4103 | TYPE: string | |
4104 | DEFAULT: none | |
4105 | LOC: Config.Announce.file | |
4106 | DOC_NONE | |
4107 | ||
4108 | NAME: announce_port | |
4109 | TYPE: ushort | |
4110 | DEFAULT: 3131 | |
4111 | LOC: Config.Announce.port | |
4112 | DOC_START | |
4113 | announce_host and announce_port set the hostname and port | |
4114 | number where the registration message will be sent. | |
4115 | ||
4116 | Hostname will default to 'tracker.ircache.net' and port will | |
4117 | default default to 3131. If the 'filename' argument is given, | |
4118 | the contents of that file will be included in the announce | |
4119 | message. | |
4120 | DOC_END | |
4121 | ||
8d6275c0 | 4122 | COMMENT_START |
4123 | HTTPD-ACCELERATOR OPTIONS | |
4124 | ----------------------------------------------------------------------------- | |
4125 | COMMENT_END | |
4126 | ||
cccac0a2 | 4127 | NAME: httpd_accel_surrogate_id |
f41735ea | 4128 | IFDEF: USE_SQUID_ESI |
cccac0a2 | 4129 | TYPE: string |
4130 | LOC: Config.Accel.surrogate_id | |
4131 | DEFAULT: unset-id | |
4132 | DOC_START | |
4133 | Surrogates (http://www.esi.org/architecture_spec_1.0.html) | |
4134 | need an identification token to allow control targeting. Because | |
4135 | a farm of surrogates may all perform the same tasks, they may share | |
4136 | an identification token. | |
4137 | DOC_END | |
4138 | ||
4139 | NAME: http_accel_surrogate_remote | |
f41735ea | 4140 | IFDEF: USE_SQUID_ESI |
cccac0a2 | 4141 | COMMENT: on|off |
4142 | TYPE: onoff | |
4143 | DEFAULT: off | |
4144 | LOC: Config.onoff.surrogate_is_remote | |
4145 | DOC_START | |
4146 | Remote surrogates (such as those in a CDN) honour Surrogate-Control: no-store-remote. | |
4147 | Set this to on to have squid behave as a remote surrogate. | |
4148 | DOC_END | |
4149 | ||
4150 | NAME: esi_parser | |
f41735ea | 4151 | IFDEF: USE_SQUID_ESI |
964b44c3 | 4152 | COMMENT: libxml2|expat|custom |
cccac0a2 | 4153 | TYPE: string |
4154 | LOC: ESIParser::Type | |
4155 | DEFAULT: custom | |
4156 | DOC_START | |
4157 | ESI markup is not strictly XML compatible. The custom ESI parser | |
4158 | will give higher performance, but cannot handle non ASCII character | |
4159 | encodings. | |
4160 | DOC_END | |
0976f8db | 4161 | |
9edd9041 | 4162 | COMMENT_START |
8d6275c0 | 4163 | DELAY POOL PARAMETERS |
9edd9041 | 4164 | ----------------------------------------------------------------------------- |
4165 | COMMENT_END | |
4166 | ||
4167 | NAME: delay_pools | |
4168 | TYPE: delay_pool_count | |
4169 | DEFAULT: 0 | |
4170 | IFDEF: DELAY_POOLS | |
4171 | LOC: Config.Delay | |
4172 | DOC_START | |
4173 | This represents the number of delay pools to be used. For example, | |
4174 | if you have one class 2 delay pool and one class 3 delays pool, you | |
4175 | have a total of 2 delay pools. | |
4176 | DOC_END | |
4177 | ||
4178 | NAME: delay_class | |
4179 | TYPE: delay_pool_class | |
4180 | DEFAULT: none | |
4181 | IFDEF: DELAY_POOLS | |
4182 | LOC: Config.Delay | |
4183 | DOC_START | |
4184 | This defines the class of each delay pool. There must be exactly one | |
4185 | delay_class line for each delay pool. For example, to define two | |
4186 | delay pools, one of class 2 and one of class 3, the settings above | |
4187 | and here would be: | |
4188 | ||
b1fb3348 AJ |
4189 | Example: |
4190 | delay_pools 4 # 4 delay pools | |
4191 | delay_class 1 2 # pool 1 is a class 2 pool | |
4192 | delay_class 2 3 # pool 2 is a class 3 pool | |
4193 | delay_class 3 4 # pool 3 is a class 4 pool | |
4194 | delay_class 4 5 # pool 4 is a class 5 pool | |
9edd9041 | 4195 | |
4196 | The delay pool classes are: | |
4197 | ||
4198 | class 1 Everything is limited by a single aggregate | |
4199 | bucket. | |
4200 | ||
4201 | class 2 Everything is limited by a single aggregate | |
4202 | bucket as well as an "individual" bucket chosen | |
b1fb3348 | 4203 | from bits 25 through 32 of the IPv4 address. |
9edd9041 | 4204 | |
4205 | class 3 Everything is limited by a single aggregate | |
4206 | bucket as well as a "network" bucket chosen | |
4207 | from bits 17 through 24 of the IP address and a | |
4208 | "individual" bucket chosen from bits 17 through | |
b1fb3348 | 4209 | 32 of the IPv4 address. |
9edd9041 | 4210 | |
4211 | class 4 Everything in a class 3 delay pool, with an | |
4212 | additional limit on a per user basis. This | |
4213 | only takes effect if the username is established | |
4214 | in advance - by forcing authentication in your | |
4215 | http_access rules. | |
4216 | ||
4217 | class 5 Requests are grouped according their tag (see | |
4218 | external_acl's tag= reply). | |
4219 | ||
4220 | NOTE: If an IP address is a.b.c.d | |
4221 | -> bits 25 through 32 are "d" | |
4222 | -> bits 17 through 24 are "c" | |
4223 | -> bits 17 through 32 are "c * 256 + d" | |
b1fb3348 AJ |
4224 | |
4225 | NOTE-2: Due to the use of bitmasks in class 2,3,4 pools they only apply to | |
4226 | IPv4 traffic. Class 1 and 5 pools may be used with IPv6 traffic. | |
9edd9041 | 4227 | DOC_END |
4228 | ||
4229 | NAME: delay_access | |
4230 | TYPE: delay_pool_access | |
4231 | DEFAULT: none | |
4232 | IFDEF: DELAY_POOLS | |
4233 | LOC: Config.Delay | |
4234 | DOC_START | |
4235 | This is used to determine which delay pool a request falls into. | |
4236 | ||
4237 | delay_access is sorted per pool and the matching starts with pool 1, | |
4238 | then pool 2, ..., and finally pool N. The first delay pool where the | |
4239 | request is allowed is selected for the request. If it does not allow | |
4240 | the request to any pool then the request is not delayed (default). | |
4241 | ||
4242 | For example, if you want some_big_clients in delay | |
4243 | pool 1 and lotsa_little_clients in delay pool 2: | |
4244 | ||
4245 | Example: | |
4246 | delay_access 1 allow some_big_clients | |
4247 | delay_access 1 deny all | |
4248 | delay_access 2 allow lotsa_little_clients | |
4249 | delay_access 2 deny all | |
4250 | delay_access 3 allow authenticated_clients | |
4251 | DOC_END | |
4252 | ||
4253 | NAME: delay_parameters | |
4254 | TYPE: delay_pool_rates | |
4255 | DEFAULT: none | |
4256 | IFDEF: DELAY_POOLS | |
4257 | LOC: Config.Delay | |
4258 | DOC_START | |
4259 | This defines the parameters for a delay pool. Each delay pool has | |
4260 | a number of "buckets" associated with it, as explained in the | |
4261 | description of delay_class. For a class 1 delay pool, the syntax is: | |
4262 | ||
4263 | delay_parameters pool aggregate | |
4264 | ||
4265 | For a class 2 delay pool: | |
4266 | ||
4267 | delay_parameters pool aggregate individual | |
4268 | ||
4269 | For a class 3 delay pool: | |
4270 | ||
4271 | delay_parameters pool aggregate network individual | |
4272 | ||
4273 | For a class 4 delay pool: | |
4274 | ||
4275 | delay_parameters pool aggregate network individual user | |
4276 | ||
4277 | For a class 5 delay pool: | |
4278 | ||
4279 | delay_parameters pool tag | |
4280 | ||
4281 | The variables here are: | |
4282 | ||
4283 | pool a pool number - ie, a number between 1 and the | |
4284 | number specified in delay_pools as used in | |
4285 | delay_class lines. | |
4286 | ||
4287 | aggregate the "delay parameters" for the aggregate bucket | |
4288 | (class 1, 2, 3). | |
4289 | ||
4290 | individual the "delay parameters" for the individual | |
4291 | buckets (class 2, 3). | |
4292 | ||
4293 | network the "delay parameters" for the network buckets | |
4294 | (class 3). | |
4295 | ||
4296 | user the delay parameters for the user buckets | |
4297 | (class 4). | |
4298 | ||
4299 | tag the delay parameters for the tag buckets | |
4300 | (class 5). | |
4301 | ||
4302 | A pair of delay parameters is written restore/maximum, where restore is | |
4303 | the number of bytes (not bits - modem and network speeds are usually | |
4304 | quoted in bits) per second placed into the bucket, and maximum is the | |
4305 | maximum number of bytes which can be in the bucket at any time. | |
4306 | ||
4307 | For example, if delay pool number 1 is a class 2 delay pool as in the | |
4308 | above example, and is being used to strictly limit each host to 64kbps | |
4309 | (plus overheads), with no overall limit, the line is: | |
4310 | ||
4311 | delay_parameters 1 -1/-1 8000/8000 | |
4312 | ||
4313 | Note that the figure -1 is used to represent "unlimited". | |
4314 | ||
4315 | And, if delay pool number 2 is a class 3 delay pool as in the above | |
4316 | example, and you want to limit it to a total of 256kbps (strict limit) | |
4317 | with each 8-bit network permitted 64kbps (strict limit) and each | |
4318 | individual host permitted 4800bps with a bucket maximum size of 64kb | |
4319 | to permit a decent web page to be downloaded at a decent speed | |
4320 | (if the network is not being limited due to overuse) but slow down | |
4321 | large downloads more significantly: | |
4322 | ||
4323 | delay_parameters 2 32000/32000 8000/8000 600/8000 | |
4324 | ||
4325 | There must be one delay_parameters line for each delay pool. | |
4326 | ||
4327 | Finally, for a class 4 delay pool as in the example - each user will | |
4328 | be limited to 128Kb no matter how many workstations they are logged into.: | |
4329 | ||
4330 | delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000 | |
4331 | DOC_END | |
4332 | ||
4333 | NAME: delay_initial_bucket_level | |
4334 | COMMENT: (percent, 0-100) | |
4335 | TYPE: ushort | |
4336 | DEFAULT: 50 | |
4337 | IFDEF: DELAY_POOLS | |
4338 | LOC: Config.Delay.initial | |
4339 | DOC_START | |
4340 | The initial bucket percentage is used to determine how much is put | |
4341 | in each bucket when squid starts, is reconfigured, or first notices | |
4342 | a host accessing it (in class 2 and class 3, individual hosts and | |
4343 | networks only have buckets associated with them once they have been | |
4344 | "seen" by squid). | |
4345 | DOC_END | |
4346 | ||
cccac0a2 | 4347 | COMMENT_START |
8d6275c0 | 4348 | WCCPv1 AND WCCPv2 CONFIGURATION OPTIONS |
cccac0a2 | 4349 | ----------------------------------------------------------------------------- |
4350 | COMMENT_END | |
4351 | ||
8d6275c0 | 4352 | NAME: wccp_router |
4353 | TYPE: address | |
4354 | LOC: Config.Wccp.router | |
4355 | DEFAULT: 0.0.0.0 | |
4356 | IFDEF: USE_WCCP | |
e313ab0a AJ |
4357 | DOC_START |
4358 | Use this option to define your WCCP ``home'' router for | |
4359 | Squid. | |
4360 | ||
4361 | wccp_router supports a single WCCP(v1) router | |
4362 | ||
4363 | wccp2_router supports multiple WCCPv2 routers | |
4364 | ||
4365 | only one of the two may be used at the same time and defines | |
4366 | which version of WCCP to use. | |
4367 | DOC_END | |
df2eec10 | 4368 | |
8d6275c0 | 4369 | NAME: wccp2_router |
9fb4efad | 4370 | TYPE: IpAddress_list |
8d6275c0 | 4371 | LOC: Config.Wccp2.router |
cccac0a2 | 4372 | DEFAULT: none |
8d6275c0 | 4373 | IFDEF: USE_WCCPv2 |
cccac0a2 | 4374 | DOC_START |
8d6275c0 | 4375 | Use this option to define your WCCP ``home'' router for |
4376 | Squid. | |
cccac0a2 | 4377 | |
8d6275c0 | 4378 | wccp_router supports a single WCCP(v1) router |
cccac0a2 | 4379 | |
8d6275c0 | 4380 | wccp2_router supports multiple WCCPv2 routers |
cccac0a2 | 4381 | |
8d6275c0 | 4382 | only one of the two may be used at the same time and defines |
4383 | which version of WCCP to use. | |
4384 | DOC_END | |
4385 | ||
4386 | NAME: wccp_version | |
cccac0a2 | 4387 | TYPE: int |
8d6275c0 | 4388 | LOC: Config.Wccp.version |
4389 | DEFAULT: 4 | |
4390 | IFDEF: USE_WCCP | |
cccac0a2 | 4391 | DOC_START |
8d6275c0 | 4392 | This directive is only relevant if you need to set up WCCP(v1) |
4393 | to some very old and end-of-life Cisco routers. In all other | |
4394 | setups it must be left unset or at the default setting. | |
4395 | It defines an internal version in the WCCP(v1) protocol, | |
4396 | with version 4 being the officially documented protocol. | |
cccac0a2 | 4397 | |
8d6275c0 | 4398 | According to some users, Cisco IOS 11.2 and earlier only |
4399 | support WCCP version 3. If you're using that or an earlier | |
4400 | version of IOS, you may need to change this value to 3, otherwise | |
4401 | do not specify this parameter. | |
cccac0a2 | 4402 | DOC_END |
4403 | ||
8d6275c0 | 4404 | NAME: wccp2_rebuild_wait |
4405 | TYPE: onoff | |
4406 | LOC: Config.Wccp2.rebuildwait | |
4407 | DEFAULT: on | |
4408 | IFDEF: USE_WCCPv2 | |
4409 | DOC_START | |
4410 | If this is enabled Squid will wait for the cache dir rebuild to finish | |
4411 | before sending the first wccp2 HereIAm packet | |
4412 | DOC_END | |
cccac0a2 | 4413 | |
8d6275c0 | 4414 | NAME: wccp2_forwarding_method |
e313ab0a | 4415 | TYPE: wccp2_method |
8d6275c0 | 4416 | LOC: Config.Wccp2.forwarding_method |
451c4786 | 4417 | DEFAULT: gre |
8d6275c0 | 4418 | IFDEF: USE_WCCPv2 |
cccac0a2 | 4419 | DOC_START |
699acd19 | 4420 | WCCP2 allows the setting of forwarding methods between the |
8d6275c0 | 4421 | router/switch and the cache. Valid values are as follows: |
cccac0a2 | 4422 | |
451c4786 AJ |
4423 | gre - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) |
4424 | l2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) | |
cccac0a2 | 4425 | |
8d6275c0 | 4426 | Currently (as of IOS 12.4) cisco routers only support GRE. |
4427 | Cisco switches only support the L2 redirect assignment method. | |
cccac0a2 | 4428 | DOC_END |
4429 | ||
8d6275c0 | 4430 | NAME: wccp2_return_method |
e313ab0a | 4431 | TYPE: wccp2_method |
8d6275c0 | 4432 | LOC: Config.Wccp2.return_method |
451c4786 | 4433 | DEFAULT: gre |
8d6275c0 | 4434 | IFDEF: USE_WCCPv2 |
cccac0a2 | 4435 | DOC_START |
699acd19 | 4436 | WCCP2 allows the setting of return methods between the |
8d6275c0 | 4437 | router/switch and the cache for packets that the cache |
4438 | decides not to handle. Valid values are as follows: | |
cccac0a2 | 4439 | |
451c4786 AJ |
4440 | gre - GRE encapsulation (forward the packet in a GRE/WCCP tunnel) |
4441 | l2 - L2 redirect (forward the packet using Layer 2/MAC rewriting) | |
cccac0a2 | 4442 | |
8d6275c0 | 4443 | Currently (as of IOS 12.4) cisco routers only support GRE. |
4444 | Cisco switches only support the L2 redirect assignment. | |
cccac0a2 | 4445 | |
699acd19 | 4446 | If the "ip wccp redirect exclude in" command has been |
8d6275c0 | 4447 | enabled on the cache interface, then it is still safe for |
4448 | the proxy server to use a l2 redirect method even if this | |
4449 | option is set to GRE. | |
cccac0a2 | 4450 | DOC_END |
4451 | ||
8d6275c0 | 4452 | NAME: wccp2_assignment_method |
451c4786 | 4453 | TYPE: wccp2_amethod |
8d6275c0 | 4454 | LOC: Config.Wccp2.assignment_method |
451c4786 | 4455 | DEFAULT: hash |
8d6275c0 | 4456 | IFDEF: USE_WCCPv2 |
cccac0a2 | 4457 | DOC_START |
8d6275c0 | 4458 | WCCP2 allows the setting of methods to assign the WCCP hash |
4459 | Valid values are as follows: | |
cccac0a2 | 4460 | |
451c4786 AJ |
4461 | hash - Hash assignment |
4462 | mask - Mask assignment | |
cccac0a2 | 4463 | |
8d6275c0 | 4464 | As a general rule, cisco routers support the hash assignment method |
4465 | and cisco switches support the mask assignment method. | |
4466 | DOC_END | |
cccac0a2 | 4467 | |
8d6275c0 | 4468 | NAME: wccp2_service |
4469 | TYPE: wccp2_service | |
4470 | LOC: Config.Wccp2.info | |
4471 | DEFAULT: none | |
4472 | DEFAULT_IF_NONE: standard 0 | |
4473 | IFDEF: USE_WCCPv2 | |
4474 | DOC_START | |
4475 | WCCP2 allows for multiple traffic services. There are two | |
4476 | types: "standard" and "dynamic". The standard type defines | |
4477 | one service id - http (id 0). The dynamic service ids can be from | |
4478 | 51 to 255 inclusive. In order to use a dynamic service id | |
4479 | one must define the type of traffic to be redirected; this is done | |
4480 | using the wccp2_service_info option. | |
4481 | ||
4482 | The "standard" type does not require a wccp2_service_info option, | |
4483 | just specifying the service id will suffice. | |
4484 | ||
4485 | MD5 service authentication can be enabled by adding | |
4486 | "password=<password>" to the end of this service declaration. | |
4487 | ||
4488 | Examples: | |
4489 | ||
4490 | wccp2_service standard 0 # for the 'web-cache' standard service | |
4491 | wccp2_service dynamic 80 # a dynamic service type which will be | |
4492 | # fleshed out with subsequent options. | |
4493 | wccp2_service standard 0 password=foo | |
8d6275c0 | 4494 | DOC_END |
4495 | ||
4496 | NAME: wccp2_service_info | |
4497 | TYPE: wccp2_service_info | |
4498 | LOC: Config.Wccp2.info | |
4499 | DEFAULT: none | |
4500 | IFDEF: USE_WCCPv2 | |
4501 | DOC_START | |
4502 | Dynamic WCCPv2 services require further information to define the | |
4503 | traffic you wish to have diverted. | |
4504 | ||
4505 | The format is: | |
4506 | ||
4507 | wccp2_service_info <id> protocol=<protocol> flags=<flag>,<flag>.. | |
4508 | priority=<priority> ports=<port>,<port>.. | |
4509 | ||
4510 | The relevant WCCPv2 flags: | |
4511 | + src_ip_hash, dst_ip_hash | |
005fe566 | 4512 | + source_port_hash, dst_port_hash |
8d6275c0 | 4513 | + src_ip_alt_hash, dst_ip_alt_hash |
4514 | + src_port_alt_hash, dst_port_alt_hash | |
4515 | + ports_source | |
4516 | ||
4517 | The port list can be one to eight entries. | |
4518 | ||
4519 | Example: | |
4520 | ||
4521 | wccp2_service_info 80 protocol=tcp flags=src_ip_hash,ports_source | |
4522 | priority=240 ports=80 | |
4523 | ||
4524 | Note: the service id must have been defined by a previous | |
4525 | 'wccp2_service dynamic <id>' entry. | |
4526 | DOC_END | |
4527 | ||
4528 | NAME: wccp2_weight | |
4529 | TYPE: int | |
4530 | LOC: Config.Wccp2.weight | |
4531 | DEFAULT: 10000 | |
4532 | IFDEF: USE_WCCPv2 | |
4533 | DOC_START | |
4534 | Each cache server gets assigned a set of the destination | |
4535 | hash proportional to their weight. | |
4536 | DOC_END | |
4537 | ||
4538 | NAME: wccp_address | |
4539 | TYPE: address | |
4540 | LOC: Config.Wccp.address | |
4541 | DEFAULT: 0.0.0.0 | |
4542 | IFDEF: USE_WCCP | |
4543 | DOC_NONE | |
df2eec10 | 4544 | |
8d6275c0 | 4545 | NAME: wccp2_address |
4546 | TYPE: address | |
4547 | LOC: Config.Wccp2.address | |
4548 | DEFAULT: 0.0.0.0 | |
4549 | IFDEF: USE_WCCPv2 | |
4550 | DOC_START | |
4551 | Use this option if you require WCCP to use a specific | |
4552 | interface address. | |
4553 | ||
4554 | The default behavior is to not bind to any specific address. | |
4555 | DOC_END | |
4556 | ||
4557 | COMMENT_START | |
4558 | PERSISTENT CONNECTION HANDLING | |
4559 | ----------------------------------------------------------------------------- | |
4560 | ||
4561 | Also see "pconn_timeout" in the TIMEOUTS section | |
4562 | COMMENT_END | |
4563 | ||
4564 | NAME: client_persistent_connections | |
4565 | TYPE: onoff | |
4566 | LOC: Config.onoff.client_pconns | |
4567 | DEFAULT: on | |
4568 | DOC_NONE | |
4569 | ||
4570 | NAME: server_persistent_connections | |
4571 | TYPE: onoff | |
4572 | LOC: Config.onoff.server_pconns | |
4573 | DEFAULT: on | |
4574 | DOC_START | |
4575 | Persistent connection support for clients and servers. By | |
4576 | default, Squid uses persistent connections (when allowed) | |
4577 | with its clients and servers. You can use these options to | |
4578 | disable persistent connections with clients and/or servers. | |
4579 | DOC_END | |
4580 | ||
4581 | NAME: persistent_connection_after_error | |
4582 | TYPE: onoff | |
4583 | LOC: Config.onoff.error_pconns | |
4584 | DEFAULT: off | |
4585 | DOC_START | |
4586 | With this directive the use of persistent connections after | |
4587 | HTTP errors can be disabled. Useful if you have clients | |
4588 | who fail to handle errors on persistent connections proper. | |
4589 | DOC_END | |
4590 | ||
4591 | NAME: detect_broken_pconn | |
4592 | TYPE: onoff | |
4593 | LOC: Config.onoff.detect_broken_server_pconns | |
4594 | DEFAULT: off | |
4595 | DOC_START | |
4596 | Some servers have been found to incorrectly signal the use | |
4597 | of HTTP/1.0 persistent connections even on replies not | |
4598 | compatible, causing significant delays. This server problem | |
4599 | has mostly been seen on redirects. | |
4600 | ||
4601 | By enabling this directive Squid attempts to detect such | |
4602 | broken replies and automatically assume the reply is finished | |
4603 | after 10 seconds timeout. | |
4604 | DOC_END | |
4605 | ||
4606 | COMMENT_START | |
4607 | CACHE DIGEST OPTIONS | |
4608 | ----------------------------------------------------------------------------- | |
4609 | COMMENT_END | |
4610 | ||
4611 | NAME: digest_generation | |
4612 | IFDEF: USE_CACHE_DIGESTS | |
4613 | TYPE: onoff | |
4614 | LOC: Config.onoff.digest_generation | |
4615 | DEFAULT: on | |
4616 | DOC_START | |
4617 | This controls whether the server will generate a Cache Digest | |
4618 | of its contents. By default, Cache Digest generation is | |
13e917b5 | 4619 | enabled if Squid is compiled with --enable-cache-digests defined. |
8d6275c0 | 4620 | DOC_END |
4621 | ||
4622 | NAME: digest_bits_per_entry | |
4623 | IFDEF: USE_CACHE_DIGESTS | |
4624 | TYPE: int | |
4625 | LOC: Config.digest.bits_per_entry | |
4626 | DEFAULT: 5 | |
4627 | DOC_START | |
4628 | This is the number of bits of the server's Cache Digest which | |
4629 | will be associated with the Digest entry for a given HTTP | |
4630 | Method and URL (public key) combination. The default is 5. | |
4631 | DOC_END | |
4632 | ||
4633 | NAME: digest_rebuild_period | |
4634 | IFDEF: USE_CACHE_DIGESTS | |
4635 | COMMENT: (seconds) | |
4636 | TYPE: time_t | |
4637 | LOC: Config.digest.rebuild_period | |
4638 | DEFAULT: 1 hour | |
4639 | DOC_START | |
749ceff8 | 4640 | This is the wait time between Cache Digest rebuilds. |
8d6275c0 | 4641 | DOC_END |
4642 | ||
4643 | NAME: digest_rewrite_period | |
4644 | COMMENT: (seconds) | |
4645 | IFDEF: USE_CACHE_DIGESTS | |
4646 | TYPE: time_t | |
4647 | LOC: Config.digest.rewrite_period | |
4648 | DEFAULT: 1 hour | |
4649 | DOC_START | |
749ceff8 | 4650 | This is the wait time between Cache Digest writes to |
8d6275c0 | 4651 | disk. |
4652 | DOC_END | |
4653 | ||
4654 | NAME: digest_swapout_chunk_size | |
4655 | COMMENT: (bytes) | |
4656 | TYPE: b_size_t | |
4657 | IFDEF: USE_CACHE_DIGESTS | |
4658 | LOC: Config.digest.swapout_chunk_size | |
4659 | DEFAULT: 4096 bytes | |
4660 | DOC_START | |
4661 | This is the number of bytes of the Cache Digest to write to | |
4662 | disk at a time. It defaults to 4096 bytes (4KB), the Squid | |
4663 | default swap page. | |
4664 | DOC_END | |
4665 | ||
4666 | NAME: digest_rebuild_chunk_percentage | |
4667 | COMMENT: (percent, 0-100) | |
4668 | IFDEF: USE_CACHE_DIGESTS | |
4669 | TYPE: int | |
4670 | LOC: Config.digest.rebuild_chunk_percentage | |
4671 | DEFAULT: 10 | |
4672 | DOC_START | |
4673 | This is the percentage of the Cache Digest to be scanned at a | |
4674 | time. By default it is set to 10% of the Cache Digest. | |
4675 | DOC_END | |
4676 | ||
1db9eacd | 4677 | COMMENT_START |
5473c134 | 4678 | SNMP OPTIONS |
1db9eacd | 4679 | ----------------------------------------------------------------------------- |
4680 | COMMENT_END | |
4681 | ||
5473c134 | 4682 | NAME: snmp_port |
4683 | TYPE: ushort | |
4684 | LOC: Config.Port.snmp | |
87630341 | 4685 | DEFAULT: 0 |
5473c134 | 4686 | IFDEF: SQUID_SNMP |
8d6275c0 | 4687 | DOC_START |
87630341 | 4688 | The port number where Squid listens for SNMP requests. To enable |
4689 | SNMP support set this to a suitable port number. Port number | |
4690 | 3401 is often used for the Squid SNMP agent. By default it's | |
4691 | set to "0" (disabled) | |
4692 | NOCOMMENT_START | |
4693 | #snmp_port 3401 | |
4694 | NOCOMMENT_END | |
8d6275c0 | 4695 | DOC_END |
4696 | ||
5473c134 | 4697 | NAME: snmp_access |
4698 | TYPE: acl_access | |
4699 | LOC: Config.accessList.snmp | |
8d6275c0 | 4700 | DEFAULT: none |
5473c134 | 4701 | DEFAULT_IF_NONE: deny all |
4702 | IFDEF: SQUID_SNMP | |
8d6275c0 | 4703 | DOC_START |
5473c134 | 4704 | Allowing or denying access to the SNMP port. |
8d6275c0 | 4705 | |
5473c134 | 4706 | All access to the agent is denied by default. |
4707 | usage: | |
8d6275c0 | 4708 | |
5473c134 | 4709 | snmp_access allow|deny [!]aclname ... |
8d6275c0 | 4710 | |
b3567eb5 FC |
4711 | This clause only supports fast acl types. |
4712 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
5473c134 | 4713 | Example: |
4714 | snmp_access allow snmppublic localhost | |
4715 | snmp_access deny all | |
cccac0a2 | 4716 | DOC_END |
4717 | ||
5473c134 | 4718 | NAME: snmp_incoming_address |
4719 | TYPE: address | |
4720 | LOC: Config.Addrs.snmp_incoming | |
4721 | DEFAULT: 0.0.0.0 | |
4722 | IFDEF: SQUID_SNMP | |
4723 | DOC_NONE | |
df2eec10 | 4724 | |
5473c134 | 4725 | NAME: snmp_outgoing_address |
4726 | TYPE: address | |
4727 | LOC: Config.Addrs.snmp_outgoing | |
4728 | DEFAULT: 255.255.255.255 | |
4729 | IFDEF: SQUID_SNMP | |
cccac0a2 | 4730 | DOC_START |
df2eec10 | 4731 | Just like 'udp_incoming_address', but for the SNMP port. |
cccac0a2 | 4732 | |
5473c134 | 4733 | snmp_incoming_address is used for the SNMP socket receiving |
4734 | messages from SNMP agents. | |
4735 | snmp_outgoing_address is used for SNMP packets returned to SNMP | |
4736 | agents. | |
cccac0a2 | 4737 | |
5473c134 | 4738 | The default snmp_incoming_address (0.0.0.0) is to listen on all |
4739 | available network interfaces. | |
cccac0a2 | 4740 | |
5473c134 | 4741 | If snmp_outgoing_address is set to 255.255.255.255 (the default) |
4742 | it will use the same socket as snmp_incoming_address. Only | |
4743 | change this if you want to have SNMP replies sent using another | |
4744 | address than where this Squid listens for SNMP queries. | |
cccac0a2 | 4745 | |
5473c134 | 4746 | NOTE, snmp_incoming_address and snmp_outgoing_address can not have |
4747 | the same value since they both use port 3401. | |
cccac0a2 | 4748 | DOC_END |
4749 | ||
5473c134 | 4750 | COMMENT_START |
4751 | ICP OPTIONS | |
4752 | ----------------------------------------------------------------------------- | |
4753 | COMMENT_END | |
4754 | ||
4755 | NAME: icp_port udp_port | |
4756 | TYPE: ushort | |
4757 | DEFAULT: 0 | |
4758 | LOC: Config.Port.icp | |
cccac0a2 | 4759 | DOC_START |
5473c134 | 4760 | The port number where Squid sends and receives ICP queries to |
4761 | and from neighbor caches. The standard UDP port for ICP is 3130. | |
4762 | Default is disabled (0). | |
4763 | NOCOMMENT_START | |
df2eec10 | 4764 | #icp_port @DEFAULT_ICP_PORT@ |
5473c134 | 4765 | NOCOMMENT_END |
cccac0a2 | 4766 | DOC_END |
4767 | ||
5473c134 | 4768 | NAME: htcp_port |
4769 | IFDEF: USE_HTCP | |
4770 | TYPE: ushort | |
87630341 | 4771 | DEFAULT: 0 |
5473c134 | 4772 | LOC: Config.Port.htcp |
cccac0a2 | 4773 | DOC_START |
5473c134 | 4774 | The port number where Squid sends and receives HTCP queries to |
87630341 | 4775 | and from neighbor caches. To turn it on you want to set it to |
4776 | 4827. By default it is set to "0" (disabled). | |
4777 | NOCOMMENT_START | |
4778 | #htcp_port 4827 | |
4779 | NOCOMMENT_END | |
cccac0a2 | 4780 | DOC_END |
4781 | ||
4782 | NAME: log_icp_queries | |
4783 | COMMENT: on|off | |
4784 | TYPE: onoff | |
4785 | DEFAULT: on | |
4786 | LOC: Config.onoff.log_udp | |
4787 | DOC_START | |
4788 | If set, ICP queries are logged to access.log. You may wish | |
4789 | do disable this if your ICP load is VERY high to speed things | |
4790 | up or to simplify log analysis. | |
4791 | DOC_END | |
4792 | ||
5473c134 | 4793 | NAME: udp_incoming_address |
4794 | TYPE: address | |
4795 | LOC:Config.Addrs.udp_incoming | |
4796 | DEFAULT: 0.0.0.0 | |
8524d4b2 | 4797 | DOC_START |
4798 | udp_incoming_address is used for UDP packets received from other | |
4799 | caches. | |
4800 | ||
4801 | The default behavior is to not bind to any specific address. | |
4802 | ||
4803 | Only change this if you want to have all UDP queries received on | |
4804 | a specific interface/address. | |
4805 | ||
4806 | NOTE: udp_incoming_address is used by the ICP, HTCP, and DNS | |
4807 | modules. Altering it will affect all of them in the same manner. | |
4808 | ||
4809 | see also; udp_outgoing_address | |
4810 | ||
4811 | NOTE, udp_incoming_address and udp_outgoing_address can not | |
4812 | have the same value since they both use the same port. | |
4813 | DOC_END | |
cccac0a2 | 4814 | |
5473c134 | 4815 | NAME: udp_outgoing_address |
4816 | TYPE: address | |
4817 | LOC: Config.Addrs.udp_outgoing | |
4818 | DEFAULT: 255.255.255.255 | |
cccac0a2 | 4819 | DOC_START |
8524d4b2 | 4820 | udp_outgoing_address is used for UDP packets sent out to other |
5473c134 | 4821 | caches. |
cccac0a2 | 4822 | |
5473c134 | 4823 | The default behavior is to not bind to any specific address. |
cccac0a2 | 4824 | |
8524d4b2 | 4825 | Instead it will use the same socket as udp_incoming_address. |
4826 | Only change this if you want to have UDP queries sent using another | |
4827 | address than where this Squid listens for UDP queries from other | |
5473c134 | 4828 | caches. |
4829 | ||
8524d4b2 | 4830 | NOTE: udp_outgoing_address is used by the ICP, HTCP, and DNS |
4831 | modules. Altering it will affect all of them in the same manner. | |
4832 | ||
4833 | see also; udp_incoming_address | |
4834 | ||
5473c134 | 4835 | NOTE, udp_incoming_address and udp_outgoing_address can not |
8524d4b2 | 4836 | have the same value since they both use the same port. |
cccac0a2 | 4837 | DOC_END |
4838 | ||
3d1e3e43 | 4839 | NAME: icp_hit_stale |
4840 | COMMENT: on|off | |
4841 | TYPE: onoff | |
4842 | DEFAULT: off | |
4843 | LOC: Config.onoff.icp_hit_stale | |
4844 | DOC_START | |
4845 | If you want to return ICP_HIT for stale cache objects, set this | |
4846 | option to 'on'. If you have sibling relationships with caches | |
4847 | in other administrative domains, this should be 'off'. If you only | |
4848 | have sibling relationships with caches under your control, | |
4849 | it is probably okay to set this to 'on'. | |
4850 | If set to 'on', your siblings should use the option "allow-miss" | |
4851 | on their cache_peer lines for connecting to you. | |
4852 | DOC_END | |
4853 | ||
5473c134 | 4854 | NAME: minimum_direct_hops |
cccac0a2 | 4855 | TYPE: int |
5473c134 | 4856 | DEFAULT: 4 |
4857 | LOC: Config.minDirectHops | |
cccac0a2 | 4858 | DOC_START |
5473c134 | 4859 | If using the ICMP pinging stuff, do direct fetches for sites |
4860 | which are no more than this many hops away. | |
cccac0a2 | 4861 | DOC_END |
4862 | ||
5473c134 | 4863 | NAME: minimum_direct_rtt |
4864 | TYPE: int | |
4865 | DEFAULT: 400 | |
4866 | LOC: Config.minDirectRtt | |
cccac0a2 | 4867 | DOC_START |
5473c134 | 4868 | If using the ICMP pinging stuff, do direct fetches for sites |
4869 | which are no more than this many rtt milliseconds away. | |
cccac0a2 | 4870 | DOC_END |
4871 | ||
cccac0a2 | 4872 | NAME: netdb_low |
4873 | TYPE: int | |
4874 | DEFAULT: 900 | |
4875 | LOC: Config.Netdb.low | |
4876 | DOC_NONE | |
4877 | ||
4878 | NAME: netdb_high | |
4879 | TYPE: int | |
4880 | DEFAULT: 1000 | |
4881 | LOC: Config.Netdb.high | |
4882 | DOC_START | |
4883 | The low and high water marks for the ICMP measurement | |
4884 | database. These are counts, not percents. The defaults are | |
4885 | 900 and 1000. When the high water mark is reached, database | |
4886 | entries will be deleted until the low mark is reached. | |
4887 | DOC_END | |
4888 | ||
cccac0a2 | 4889 | NAME: netdb_ping_period |
4890 | TYPE: time_t | |
4891 | LOC: Config.Netdb.period | |
4892 | DEFAULT: 5 minutes | |
4893 | DOC_START | |
4894 | The minimum period for measuring a site. There will be at | |
4895 | least this much delay between successive pings to the same | |
4896 | network. The default is five minutes. | |
4897 | DOC_END | |
4898 | ||
cccac0a2 | 4899 | NAME: query_icmp |
4900 | COMMENT: on|off | |
4901 | TYPE: onoff | |
4902 | DEFAULT: off | |
4903 | LOC: Config.onoff.query_icmp | |
4904 | DOC_START | |
4905 | If you want to ask your peers to include ICMP data in their ICP | |
4906 | replies, enable this option. | |
4907 | ||
4908 | If your peer has configured Squid (during compilation) with | |
7f7db318 | 4909 | '--enable-icmp' that peer will send ICMP pings to origin server |
4910 | sites of the URLs it receives. If you enable this option the | |
cccac0a2 | 4911 | ICP replies from that peer will include the ICMP data (if available). |
4912 | Then, when choosing a parent cache, Squid will choose the parent with | |
4913 | the minimal RTT to the origin server. When this happens, the | |
4914 | hierarchy field of the access.log will be | |
4915 | "CLOSEST_PARENT_MISS". This option is off by default. | |
4916 | DOC_END | |
4917 | ||
4918 | NAME: test_reachability | |
4919 | COMMENT: on|off | |
4920 | TYPE: onoff | |
4921 | DEFAULT: off | |
4922 | LOC: Config.onoff.test_reachability | |
4923 | DOC_START | |
4924 | When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH | |
4925 | instead of ICP_MISS if the target host is NOT in the ICMP | |
4926 | database, or has a zero RTT. | |
4927 | DOC_END | |
4928 | ||
5473c134 | 4929 | NAME: icp_query_timeout |
4930 | COMMENT: (msec) | |
4931 | DEFAULT: 0 | |
4932 | TYPE: int | |
4933 | LOC: Config.Timeout.icp_query | |
4c3ef9b2 | 4934 | DOC_START |
5473c134 | 4935 | Normally Squid will automatically determine an optimal ICP |
4936 | query timeout value based on the round-trip-time of recent ICP | |
4937 | queries. If you want to override the value determined by | |
4938 | Squid, set this 'icp_query_timeout' to a non-zero value. This | |
4939 | value is specified in MILLISECONDS, so, to use a 2-second | |
4940 | timeout (the old default), you would write: | |
4c3ef9b2 | 4941 | |
5473c134 | 4942 | icp_query_timeout 2000 |
4c3ef9b2 | 4943 | DOC_END |
4944 | ||
5473c134 | 4945 | NAME: maximum_icp_query_timeout |
4946 | COMMENT: (msec) | |
4947 | DEFAULT: 2000 | |
4948 | TYPE: int | |
4949 | LOC: Config.Timeout.icp_query_max | |
cccac0a2 | 4950 | DOC_START |
5473c134 | 4951 | Normally the ICP query timeout is determined dynamically. But |
4952 | sometimes it can lead to very large values (say 5 seconds). | |
4953 | Use this option to put an upper limit on the dynamic timeout | |
4954 | value. Do NOT use this option to always use a fixed (instead | |
4955 | of a dynamic) timeout value. To set a fixed timeout see the | |
4956 | 'icp_query_timeout' directive. | |
cccac0a2 | 4957 | DOC_END |
4958 | ||
5473c134 | 4959 | NAME: minimum_icp_query_timeout |
4960 | COMMENT: (msec) | |
4961 | DEFAULT: 5 | |
4962 | TYPE: int | |
4963 | LOC: Config.Timeout.icp_query_min | |
cccac0a2 | 4964 | DOC_START |
5473c134 | 4965 | Normally the ICP query timeout is determined dynamically. But |
4966 | sometimes it can lead to very small timeouts, even lower than | |
4967 | the normal latency variance on your link due to traffic. | |
4968 | Use this option to put an lower limit on the dynamic timeout | |
4969 | value. Do NOT use this option to always use a fixed (instead | |
4970 | of a dynamic) timeout value. To set a fixed timeout see the | |
4971 | 'icp_query_timeout' directive. | |
cccac0a2 | 4972 | DOC_END |
4973 | ||
5473c134 | 4974 | NAME: background_ping_rate |
4975 | COMMENT: time-units | |
4976 | TYPE: time_t | |
4977 | DEFAULT: 10 seconds | |
4978 | LOC: Config.backgroundPingRate | |
cccac0a2 | 4979 | DOC_START |
5473c134 | 4980 | Controls how often the ICP pings are sent to siblings that |
4981 | have background-ping set. | |
cccac0a2 | 4982 | DOC_END |
4983 | ||
5473c134 | 4984 | COMMENT_START |
4985 | MULTICAST ICP OPTIONS | |
4986 | ----------------------------------------------------------------------------- | |
4987 | COMMENT_END | |
4988 | ||
4989 | NAME: mcast_groups | |
4990 | TYPE: wordlist | |
4991 | LOC: Config.mcast_group_list | |
8c01ada0 | 4992 | DEFAULT: none |
4993 | DOC_START | |
5473c134 | 4994 | This tag specifies a list of multicast groups which your server |
4995 | should join to receive multicasted ICP queries. | |
8c01ada0 | 4996 | |
5473c134 | 4997 | NOTE! Be very careful what you put here! Be sure you |
4998 | understand the difference between an ICP _query_ and an ICP | |
4999 | _reply_. This option is to be set only if you want to RECEIVE | |
5000 | multicast queries. Do NOT set this option to SEND multicast | |
5001 | ICP (use cache_peer for that). ICP replies are always sent via | |
5002 | unicast, so this option does not affect whether or not you will | |
5003 | receive replies from multicast group members. | |
8c01ada0 | 5004 | |
5473c134 | 5005 | You must be very careful to NOT use a multicast address which |
5006 | is already in use by another group of caches. | |
8c01ada0 | 5007 | |
5473c134 | 5008 | If you are unsure about multicast, please read the Multicast |
5009 | chapter in the Squid FAQ (http://www.squid-cache.org/FAQ/). | |
8c01ada0 | 5010 | |
5473c134 | 5011 | Usage: mcast_groups 239.128.16.128 224.0.1.20 |
8c01ada0 | 5012 | |
5473c134 | 5013 | By default, Squid doesn't listen on any multicast groups. |
5014 | DOC_END | |
8c01ada0 | 5015 | |
5473c134 | 5016 | NAME: mcast_miss_addr |
5017 | IFDEF: MULTICAST_MISS_STREAM | |
5018 | TYPE: address | |
5019 | LOC: Config.mcast_miss.addr | |
5020 | DEFAULT: 255.255.255.255 | |
5021 | DOC_START | |
5022 | If you enable this option, every "cache miss" URL will | |
5023 | be sent out on the specified multicast address. | |
cccac0a2 | 5024 | |
5473c134 | 5025 | Do not enable this option unless you are are absolutely |
5026 | certain you understand what you are doing. | |
cccac0a2 | 5027 | DOC_END |
5028 | ||
5473c134 | 5029 | NAME: mcast_miss_ttl |
5030 | IFDEF: MULTICAST_MISS_STREAM | |
5031 | TYPE: ushort | |
5032 | LOC: Config.mcast_miss.ttl | |
5033 | DEFAULT: 16 | |
cccac0a2 | 5034 | DOC_START |
5473c134 | 5035 | This is the time-to-live value for packets multicasted |
5036 | when multicasting off cache miss URLs is enabled. By | |
5037 | default this is set to 'site scope', i.e. 16. | |
5038 | DOC_END | |
cccac0a2 | 5039 | |
5473c134 | 5040 | NAME: mcast_miss_port |
5041 | IFDEF: MULTICAST_MISS_STREAM | |
5042 | TYPE: ushort | |
5043 | LOC: Config.mcast_miss.port | |
5044 | DEFAULT: 3135 | |
5045 | DOC_START | |
5046 | This is the port number to be used in conjunction with | |
5047 | 'mcast_miss_addr'. | |
5048 | DOC_END | |
cccac0a2 | 5049 | |
5473c134 | 5050 | NAME: mcast_miss_encode_key |
5051 | IFDEF: MULTICAST_MISS_STREAM | |
5052 | TYPE: string | |
5053 | LOC: Config.mcast_miss.encode_key | |
5054 | DEFAULT: XXXXXXXXXXXXXXXX | |
5055 | DOC_START | |
5056 | The URLs that are sent in the multicast miss stream are | |
5057 | encrypted. This is the encryption key. | |
5058 | DOC_END | |
8c01ada0 | 5059 | |
5473c134 | 5060 | NAME: mcast_icp_query_timeout |
5061 | COMMENT: (msec) | |
5062 | DEFAULT: 2000 | |
5063 | TYPE: int | |
5064 | LOC: Config.Timeout.mcast_icp_query | |
5065 | DOC_START | |
5066 | For multicast peers, Squid regularly sends out ICP "probes" to | |
5067 | count how many other peers are listening on the given multicast | |
5068 | address. This value specifies how long Squid should wait to | |
5069 | count all the replies. The default is 2000 msec, or 2 | |
5070 | seconds. | |
cccac0a2 | 5071 | DOC_END |
5072 | ||
5473c134 | 5073 | COMMENT_START |
5074 | INTERNAL ICON OPTIONS | |
5075 | ----------------------------------------------------------------------------- | |
5076 | COMMENT_END | |
5077 | ||
cccac0a2 | 5078 | NAME: icon_directory |
5079 | TYPE: string | |
5080 | LOC: Config.icons.directory | |
5081 | DEFAULT: @DEFAULT_ICON_DIR@ | |
5082 | DOC_START | |
5083 | Where the icons are stored. These are normally kept in | |
5084 | @DEFAULT_ICON_DIR@ | |
5085 | DOC_END | |
5086 | ||
f024c970 | 5087 | NAME: global_internal_static |
5088 | TYPE: onoff | |
5089 | LOC: Config.onoff.global_internal_static | |
5090 | DEFAULT: on | |
5091 | DOC_START | |
5092 | This directive controls is Squid should intercept all requests for | |
5093 | /squid-internal-static/ no matter which host the URL is requesting | |
5094 | (default on setting), or if nothing special should be done for | |
5095 | such URLs (off setting). The purpose of this directive is to make | |
5096 | icons etc work better in complex cache hierarchies where it may | |
5097 | not always be possible for all corners in the cache mesh to reach | |
5098 | the server generating a directory listing. | |
5099 | DOC_END | |
5100 | ||
5473c134 | 5101 | NAME: short_icon_urls |
5102 | TYPE: onoff | |
5103 | LOC: Config.icons.use_short_names | |
5104 | DEFAULT: on | |
5105 | DOC_START | |
5106 | If this is enabled Squid will use short URLs for icons. | |
5107 | If disabled it will revert to the old behavior of including | |
5108 | it's own name and port in the URL. | |
5109 | ||
5110 | If you run a complex cache hierarchy with a mix of Squid and | |
5111 | other proxies you may need to disable this directive. | |
5112 | DOC_END | |
5113 | ||
5114 | COMMENT_START | |
5115 | ERROR PAGE OPTIONS | |
5116 | ----------------------------------------------------------------------------- | |
5117 | COMMENT_END | |
5118 | ||
5119 | NAME: error_directory | |
5120 | TYPE: string | |
5121 | LOC: Config.errorDirectory | |
43000484 | 5122 | DEFAULT: none |
5473c134 | 5123 | DOC_START |
5124 | If you wish to create your own versions of the default | |
43000484 AJ |
5125 | error files to customize them to suit your company copy |
5126 | the error/template files to another directory and point | |
5127 | this tag at them. | |
5128 | ||
5129 | WARNING: This option will disable multi-language support | |
5130 | on error pages if used. | |
5473c134 | 5131 | |
5132 | The squid developers are interested in making squid available in | |
5133 | a wide variety of languages. If you are making translations for a | |
43000484 | 5134 | language that Squid does not currently provide please consider |
5473c134 | 5135 | contributing your translation back to the project. |
43000484 AJ |
5136 | http://wiki.squid-cache.org/Translations |
5137 | ||
5138 | The squid developers working on translations are happy to supply drop-in | |
5139 | translated error files in exchange for any new language contributions. | |
5140 | DOC_END | |
5141 | ||
5142 | NAME: error_default_language | |
5143 | IFDEF: USE_ERR_LOCALES | |
5144 | TYPE: string | |
5145 | LOC: Config.errorDefaultLanguage | |
5146 | DEFAULT: none | |
5147 | DOC_START | |
5148 | Set the default language which squid will send error pages in | |
5149 | if no existing translation matches the clients language | |
5150 | preferences. | |
5151 | ||
5152 | If unset (default) generic English will be used. | |
5153 | ||
5154 | The squid developers are interested in making squid available in | |
5155 | a wide variety of languages. If you are interested in making | |
5156 | translations for any language see the squid wiki for details. | |
5157 | http://wiki.squid-cache.org/Translations | |
5473c134 | 5158 | DOC_END |
5159 | ||
c411820c AJ |
5160 | NAME: error_log_languages |
5161 | IFDEF: USE_ERR_LOCALES | |
5162 | TYPE: onoff | |
5163 | LOC: Config.errorLogMissingLanguages | |
5164 | DEFAULT: on | |
5165 | DOC_START | |
5166 | Log to cache.log what languages users are attempting to | |
5167 | auto-negotiate for translations. | |
5168 | ||
5169 | Successful negotiations are not logged. Only failures | |
5170 | have meaning to indicate that Squid may need an upgrade | |
0c49f10e | 5171 | of its error page translations. |
c411820c AJ |
5172 | DOC_END |
5173 | ||
5b52cb6c AJ |
5174 | NAME: err_page_stylesheet |
5175 | TYPE: string | |
5176 | LOC: Config.errorStylesheet | |
5177 | DEFAULT: @DEFAULT_CONFIG_DIR@/errorpage.css | |
5178 | DOC_START | |
5179 | CSS Stylesheet to pattern the display of Squid default error pages. | |
5180 | ||
5181 | For information on CSS see http://www.w3.org/Style/CSS/ | |
5182 | DOC_END | |
5183 | ||
5473c134 | 5184 | NAME: err_html_text |
5185 | TYPE: eol | |
5186 | LOC: Config.errHtmlText | |
5187 | DEFAULT: none | |
5188 | DOC_START | |
5189 | HTML text to include in error messages. Make this a "mailto" | |
5190 | URL to your admin address, or maybe just a link to your | |
5191 | organizations Web page. | |
5192 | ||
5193 | To include this in your error messages, you must rewrite | |
5194 | the error template files (found in the "errors" directory). | |
5195 | Wherever you want the 'err_html_text' line to appear, | |
5196 | insert a %L tag in the error template file. | |
5197 | DOC_END | |
5198 | ||
5199 | NAME: email_err_data | |
5200 | COMMENT: on|off | |
5201 | TYPE: onoff | |
5202 | LOC: Config.onoff.emailErrData | |
5203 | DEFAULT: on | |
5204 | DOC_START | |
5205 | If enabled, information about the occurred error will be | |
5206 | included in the mailto links of the ERR pages (if %W is set) | |
5207 | so that the email body contains the data. | |
5208 | Syntax is <A HREF="mailto:%w%W">%w</A> | |
5209 | DOC_END | |
5210 | ||
5211 | NAME: deny_info | |
5212 | TYPE: denyinfo | |
5213 | LOC: Config.denyInfoList | |
5214 | DEFAULT: none | |
5215 | DOC_START | |
5216 | Usage: deny_info err_page_name acl | |
5217 | or deny_info http://... acl | |
43000484 | 5218 | or deny_info TCP_RESET acl |
5473c134 | 5219 | |
5220 | This can be used to return a ERR_ page for requests which | |
5221 | do not pass the 'http_access' rules. Squid remembers the last | |
5222 | acl it evaluated in http_access, and if a 'deny_info' line exists | |
5223 | for that ACL Squid returns a corresponding error page. | |
5224 | ||
5225 | The acl is typically the last acl on the http_access deny line which | |
5226 | denied access. The exceptions to this rule are: | |
5227 | - When Squid needs to request authentication credentials. It's then | |
5228 | the first authentication related acl encountered | |
5229 | - When none of the http_access lines matches. It's then the last | |
5230 | acl processed on the last http_access line. | |
5231 | ||
43000484 AJ |
5232 | NP: If providing your own custom error pages with error_directory |
5233 | you may also specify them by your custom file name: | |
5234 | Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys | |
5473c134 | 5235 | |
5236 | Alternatively you can specify an error URL. The browsers will | |
5237 | get redirected (302) to the specified URL. %s in the redirection | |
5238 | URL will be replaced by the requested URL. | |
5239 | ||
5240 | Alternatively you can tell Squid to reset the TCP connection | |
5241 | by specifying TCP_RESET. | |
5242 | DOC_END | |
5243 | ||
5244 | COMMENT_START | |
5245 | OPTIONS INFLUENCING REQUEST FORWARDING | |
5246 | ----------------------------------------------------------------------------- | |
5247 | COMMENT_END | |
5248 | ||
5249 | NAME: nonhierarchical_direct | |
e72a0ec0 | 5250 | TYPE: onoff |
5473c134 | 5251 | LOC: Config.onoff.nonhierarchical_direct |
e72a0ec0 | 5252 | DEFAULT: on |
5253 | DOC_START | |
5473c134 | 5254 | By default, Squid will send any non-hierarchical requests |
5255 | (matching hierarchy_stoplist or not cacheable request type) direct | |
5256 | to origin servers. | |
e72a0ec0 | 5257 | |
5473c134 | 5258 | If you set this to off, Squid will prefer to send these |
5259 | requests to parents. | |
0b0cfcf2 | 5260 | |
5473c134 | 5261 | Note that in most configurations, by turning this off you will only |
5262 | add latency to these request without any improvement in global hit | |
5263 | ratio. | |
0b0cfcf2 | 5264 | |
5473c134 | 5265 | If you are inside an firewall see never_direct instead of |
5266 | this directive. | |
8d6275c0 | 5267 | DOC_END |
0b0cfcf2 | 5268 | |
5473c134 | 5269 | NAME: prefer_direct |
8d6275c0 | 5270 | TYPE: onoff |
5473c134 | 5271 | LOC: Config.onoff.prefer_direct |
8d6275c0 | 5272 | DEFAULT: off |
5273 | DOC_START | |
5473c134 | 5274 | Normally Squid tries to use parents for most requests. If you for some |
5275 | reason like it to first try going direct and only use a parent if | |
5276 | going direct fails set this to on. | |
0b0cfcf2 | 5277 | |
5473c134 | 5278 | By combining nonhierarchical_direct off and prefer_direct on you |
5279 | can set up Squid to use a parent as a backup path if going direct | |
5280 | fails. | |
5281 | ||
5282 | Note: If you want Squid to use parents for all requests see | |
5283 | the never_direct directive. prefer_direct only modifies how Squid | |
5284 | acts on cacheable requests. | |
cccac0a2 | 5285 | DOC_END |
5286 | ||
5473c134 | 5287 | NAME: always_direct |
8d6275c0 | 5288 | TYPE: acl_access |
5473c134 | 5289 | LOC: Config.accessList.AlwaysDirect |
0b0cfcf2 | 5290 | DEFAULT: none |
0b0cfcf2 | 5291 | DOC_START |
5473c134 | 5292 | Usage: always_direct allow|deny [!]aclname ... |
0b0cfcf2 | 5293 | |
5473c134 | 5294 | Here you can use ACL elements to specify requests which should |
5295 | ALWAYS be forwarded by Squid to the origin servers without using | |
5296 | any peers. For example, to always directly forward requests for | |
5297 | local servers ignoring any parents or siblings you may have use | |
5298 | something like: | |
0b0cfcf2 | 5299 | |
5473c134 | 5300 | acl local-servers dstdomain my.domain.net |
5301 | always_direct allow local-servers | |
0b0cfcf2 | 5302 | |
5473c134 | 5303 | To always forward FTP requests directly, use |
f16fbc82 | 5304 | |
5473c134 | 5305 | acl FTP proto FTP |
5306 | always_direct allow FTP | |
cccac0a2 | 5307 | |
5473c134 | 5308 | NOTE: There is a similar, but opposite option named |
5309 | 'never_direct'. You need to be aware that "always_direct deny | |
5310 | foo" is NOT the same thing as "never_direct allow foo". You | |
5311 | may need to use a deny rule to exclude a more-specific case of | |
5312 | some other rule. Example: | |
8d6275c0 | 5313 | |
5473c134 | 5314 | acl local-external dstdomain external.foo.net |
5315 | acl local-servers dstdomain .foo.net | |
5316 | always_direct deny local-external | |
5317 | always_direct allow local-servers | |
8d6275c0 | 5318 | |
5473c134 | 5319 | NOTE: If your goal is to make the client forward the request |
5320 | directly to the origin server bypassing Squid then this needs | |
5321 | to be done in the client configuration. Squid configuration | |
5322 | can only tell Squid how Squid should fetch the object. | |
8d6275c0 | 5323 | |
5473c134 | 5324 | NOTE: This directive is not related to caching. The replies |
5325 | is cached as usual even if you use always_direct. To not cache | |
b3567eb5 | 5326 | the replies see the 'cache' directive. |
5473c134 | 5327 | |
b3567eb5 FC |
5328 | This clause supports both fast and slow acl types. |
5329 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
cccac0a2 | 5330 | DOC_END |
0976f8db | 5331 | |
5473c134 | 5332 | NAME: never_direct |
5333 | TYPE: acl_access | |
5334 | LOC: Config.accessList.NeverDirect | |
5335 | DEFAULT: none | |
8d6275c0 | 5336 | DOC_START |
5473c134 | 5337 | Usage: never_direct allow|deny [!]aclname ... |
5338 | ||
5339 | never_direct is the opposite of always_direct. Please read | |
5340 | the description for always_direct if you have not already. | |
5341 | ||
5342 | With 'never_direct' you can use ACL elements to specify | |
5343 | requests which should NEVER be forwarded directly to origin | |
5344 | servers. For example, to force the use of a proxy for all | |
5345 | requests, except those in your local domain use something like: | |
5346 | ||
5347 | acl local-servers dstdomain .foo.net | |
5473c134 | 5348 | never_direct deny local-servers |
5349 | never_direct allow all | |
5350 | ||
5351 | or if Squid is inside a firewall and there are local intranet | |
5352 | servers inside the firewall use something like: | |
5353 | ||
5354 | acl local-intranet dstdomain .foo.net | |
5355 | acl local-external dstdomain external.foo.net | |
5356 | always_direct deny local-external | |
5357 | always_direct allow local-intranet | |
5358 | never_direct allow all | |
5359 | ||
b3567eb5 FC |
5360 | This clause supports both fast and slow acl types. |
5361 | See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details. | |
8d6275c0 | 5362 | DOC_END |
0976f8db | 5363 | |
5473c134 | 5364 | COMMENT_START |
5365 | ADVANCED NETWORKING OPTIONS | |
5366 | ----------------------------------------------------------------------------- | |
5367 | COMMENT_END | |
5368 | ||
cccac0a2 | 5369 | NAME: incoming_icp_average |
5370 | TYPE: int | |
5371 | DEFAULT: 6 | |
5372 | LOC: Config.comm_incoming.icp_average | |
5373 | DOC_NONE | |
5374 | ||
5375 | NAME: incoming_http_average | |
5376 | TYPE: int | |
5377 | DEFAULT: 4 | |
5378 | LOC: Config.comm_incoming.http_average | |
5379 | DOC_NONE | |
5380 | ||
5381 | NAME: incoming_dns_average | |
5382 | TYPE: int | |
5383 | DEFAULT: 4 | |
5384 | LOC: Config.comm_incoming.dns_average | |
5385 | DOC_NONE | |
5386 | ||
5387 | NAME: min_icp_poll_cnt | |
5388 | TYPE: int | |
5389 | DEFAULT: 8 | |
5390 | LOC: Config.comm_incoming.icp_min_poll | |
5391 | DOC_NONE | |
5392 | ||
5393 | NAME: min_dns_poll_cnt | |
5394 | TYPE: int | |
5395 | DEFAULT: 8 | |
5396 | LOC: Config.comm_incoming.dns_min_poll | |
5397 | DOC_NONE | |
5398 | ||
5399 | NAME: min_http_poll_cnt | |
5400 | TYPE: int | |
5401 | DEFAULT: 8 | |
5402 | LOC: Config.comm_incoming.http_min_poll | |
5403 | DOC_START | |
5473c134 | 5404 | Heavy voodoo here. I can't even believe you are reading this. |
5405 | Are you crazy? Don't even think about adjusting these unless | |
5406 | you understand the algorithms in comm_select.c first! | |
5407 | DOC_END | |
5408 | ||
5409 | NAME: accept_filter | |
5473c134 | 5410 | TYPE: string |
5411 | DEFAULT: none | |
5412 | LOC: Config.accept_filter | |
5413 | DOC_START | |
0b4d4be5 | 5414 | FreeBSD: |
5415 | ||
5473c134 | 5416 | The name of an accept(2) filter to install on Squid's |
5417 | listen socket(s). This feature is perhaps specific to | |
5418 | FreeBSD and requires support in the kernel. | |
5419 | ||
5420 | The 'httpready' filter delays delivering new connections | |
2324cda2 | 5421 | to Squid until a full HTTP request has been received. |
0b4d4be5 | 5422 | See the accf_http(9) man page for details. |
5423 | ||
5424 | The 'dataready' filter delays delivering new connections | |
5425 | to Squid until there is some data to process. | |
5426 | See the accf_dataready(9) man page for details. | |
5427 | ||
5428 | Linux: | |
5429 | ||
5430 | The 'data' filter delays delivering of new connections | |
5431 | to Squid until there is some data to process by TCP_ACCEPT_DEFER. | |
5432 | You may optionally specify a number of seconds to wait by | |
5433 | 'data=N' where N is the number of seconds. Defaults to 30 | |
5434 | if not specified. See the tcp(7) man page for details. | |
5473c134 | 5435 | EXAMPLE: |
0b4d4be5 | 5436 | # FreeBSD |
5473c134 | 5437 | accept_filter httpready |
0b4d4be5 | 5438 | # Linux |
5439 | accept_filter data | |
5473c134 | 5440 | DOC_END |
5441 | ||
5442 | NAME: tcp_recv_bufsize | |
5443 | COMMENT: (bytes) | |
5444 | TYPE: b_size_t | |
5445 | DEFAULT: 0 bytes | |
5446 | LOC: Config.tcpRcvBufsz | |
5447 | DOC_START | |
5448 | Size of receive buffer to set for TCP sockets. Probably just | |
5449 | as easy to change your kernel's default. Set to zero to use | |
5450 | the default buffer size. | |
5451 | DOC_END | |
5452 | ||
5453 | COMMENT_START | |
5454 | ICAP OPTIONS | |
5455 | ----------------------------------------------------------------------------- | |
5456 | COMMENT_END | |
5457 | ||
5458 | NAME: icap_enable | |
5459 | TYPE: onoff | |
5460 | IFDEF: ICAP_CLIENT | |
5461 | COMMENT: on|off | |
26cc52cb | 5462 | LOC: Adaptation::Icap::TheConfig.onoff |
5473c134 | 5463 | DEFAULT: off |
5464 | DOC_START | |
53e738c6 | 5465 | If you want to enable the ICAP module support, set this to on. |
5473c134 | 5466 | DOC_END |
5467 | ||
5468 | NAME: icap_connect_timeout | |
5469 | TYPE: time_t | |
5470 | DEFAULT: none | |
26cc52cb | 5471 | LOC: Adaptation::Icap::TheConfig.connect_timeout_raw |
5473c134 | 5472 | IFDEF: ICAP_CLIENT |
5473 | DOC_START | |
5474 | This parameter specifies how long to wait for the TCP connect to | |
5475 | the requested ICAP server to complete before giving up and either | |
5476 | terminating the HTTP transaction or bypassing the failure. | |
5477 | ||
5478 | The default for optional services is peer_connect_timeout. | |
5479 | The default for essential services is connect_timeout. | |
5480 | If this option is explicitly set, its value applies to all services. | |
5481 | DOC_END | |
5482 | ||
5483 | NAME: icap_io_timeout | |
5484 | COMMENT: time-units | |
5485 | TYPE: time_t | |
5486 | DEFAULT: none | |
26cc52cb | 5487 | LOC: Adaptation::Icap::TheConfig.io_timeout_raw |
5473c134 | 5488 | IFDEF: ICAP_CLIENT |
5489 | DOC_START | |
5490 | This parameter specifies how long to wait for an I/O activity on | |
5491 | an established, active ICAP connection before giving up and | |
5492 | either terminating the HTTP transaction or bypassing the | |
5493 | failure. | |
5494 | ||
5495 | The default is read_timeout. | |
5496 | DOC_END | |
5497 | ||
5498 | NAME: icap_service_failure_limit | |
5499 | TYPE: int | |
5500 | IFDEF: ICAP_CLIENT | |
26cc52cb | 5501 | LOC: Adaptation::Icap::TheConfig.service_failure_limit |
5473c134 | 5502 | DEFAULT: 10 |
5503 | DOC_START | |
5504 | The limit specifies the number of failures that Squid tolerates | |
5505 | when establishing a new TCP connection with an ICAP service. If | |
5506 | the number of failures exceeds the limit, the ICAP service is | |
5507 | not used for new ICAP requests until it is time to refresh its | |
5508 | OPTIONS. The per-service failure counter is reset to zero each | |
5509 | time Squid fetches new service OPTIONS. | |
5510 | ||
5511 | A negative value disables the limit. Without the limit, an ICAP | |
5512 | service will not be considered down due to connectivity failures | |
5513 | between ICAP OPTIONS requests. | |
cccac0a2 | 5514 | DOC_END |
5515 | ||
5473c134 | 5516 | NAME: icap_service_revival_delay |
cccac0a2 | 5517 | TYPE: int |
5473c134 | 5518 | IFDEF: ICAP_CLIENT |
26cc52cb | 5519 | LOC: Adaptation::Icap::TheConfig.service_revival_delay |
5473c134 | 5520 | DEFAULT: 180 |
cccac0a2 | 5521 | DOC_START |
5473c134 | 5522 | The delay specifies the number of seconds to wait after an ICAP |
5523 | OPTIONS request failure before requesting the options again. The | |
5524 | failed ICAP service is considered "down" until fresh OPTIONS are | |
5525 | fetched. | |
cccac0a2 | 5526 | |
5473c134 | 5527 | The actual delay cannot be smaller than the hardcoded minimum |
5528 | delay of 30 seconds. | |
cccac0a2 | 5529 | DOC_END |
5530 | ||
5473c134 | 5531 | NAME: icap_preview_enable |
cccac0a2 | 5532 | TYPE: onoff |
5473c134 | 5533 | IFDEF: ICAP_CLIENT |
5534 | COMMENT: on|off | |
26cc52cb | 5535 | LOC: Adaptation::Icap::TheConfig.preview_enable |
ac7a62f9 | 5536 | DEFAULT: on |
cccac0a2 | 5537 | DOC_START |
ac7a62f9 | 5538 | The ICAP Preview feature allows the ICAP server to handle the |
5539 | HTTP message by looking only at the beginning of the message body | |
5540 | or even without receiving the body at all. In some environments, | |
5541 | previews greatly speedup ICAP processing. | |
5542 | ||
5543 | During an ICAP OPTIONS transaction, the server may tell Squid what | |
5544 | HTTP messages should be previewed and how big the preview should be. | |
5545 | Squid will not use Preview if the server did not request one. | |
5546 | ||
5547 | To disable ICAP Preview for all ICAP services, regardless of | |
5548 | individual ICAP server OPTIONS responses, set this option to "off". | |
5549 | Example: | |
5550 | icap_preview_enable off | |
cccac0a2 | 5551 | DOC_END |
5552 | ||
5473c134 | 5553 | NAME: icap_preview_size |
5554 | TYPE: int | |
5555 | IFDEF: ICAP_CLIENT | |
26cc52cb | 5556 | LOC: Adaptation::Icap::TheConfig.preview_size |
5473c134 | 5557 | DEFAULT: -1 |
cccac0a2 | 5558 | DOC_START |
53e738c6 | 5559 | The default size of preview data to be sent to the ICAP server. |
5560 | -1 means no preview. This value might be overwritten on a per server | |
5561 | basis by OPTIONS requests. | |
cccac0a2 | 5562 | DOC_END |
5563 | ||
5473c134 | 5564 | NAME: icap_default_options_ttl |
5565 | TYPE: int | |
5566 | IFDEF: ICAP_CLIENT | |
26cc52cb | 5567 | LOC: Adaptation::Icap::TheConfig.default_options_ttl |
5473c134 | 5568 | DEFAULT: 60 |
cccac0a2 | 5569 | DOC_START |
53e738c6 | 5570 | The default TTL value for ICAP OPTIONS responses that don't have |
5473c134 | 5571 | an Options-TTL header. |
cccac0a2 | 5572 | DOC_END |
5573 | ||
5473c134 | 5574 | NAME: icap_persistent_connections |
5575 | TYPE: onoff | |
5576 | IFDEF: ICAP_CLIENT | |
5577 | COMMENT: on|off | |
26cc52cb | 5578 | LOC: Adaptation::Icap::TheConfig.reuse_connections |
5473c134 | 5579 | DEFAULT: on |
cccac0a2 | 5580 | DOC_START |
5473c134 | 5581 | Whether or not Squid should use persistent connections to |
5582 | an ICAP server. | |
cccac0a2 | 5583 | DOC_END |
5584 | ||
5473c134 | 5585 | NAME: icap_send_client_ip |
5586 | TYPE: onoff | |
5587 | IFDEF: ICAP_CLIENT | |
5588 | COMMENT: on|off | |
26cc52cb | 5589 | LOC: Adaptation::Icap::TheConfig.send_client_ip |
5473c134 | 5590 | DEFAULT: off |
cccac0a2 | 5591 | DOC_START |
53e738c6 | 5592 | This adds the header "X-Client-IP" to ICAP requests. |
cccac0a2 | 5593 | DOC_END |
5594 | ||
5473c134 | 5595 | NAME: icap_send_client_username |
5596 | TYPE: onoff | |
5597 | IFDEF: ICAP_CLIENT | |
5598 | COMMENT: on|off | |
26cc52cb | 5599 | LOC: Adaptation::Icap::TheConfig.send_client_username |
5473c134 | 5600 | DEFAULT: off |
cccac0a2 | 5601 | DOC_START |
5473c134 | 5602 | This sends authenticated HTTP client username (if available) to |
5603 | the ICAP service. The username value is encoded based on the | |
5604 | icap_client_username_encode option and is sent using the header | |
5605 | specified by the icap_client_username_header option. | |
cccac0a2 | 5606 | DOC_END |
5607 | ||
5473c134 | 5608 | NAME: icap_client_username_header |
cccac0a2 | 5609 | TYPE: string |
5473c134 | 5610 | IFDEF: ICAP_CLIENT |
26cc52cb | 5611 | LOC: Adaptation::Icap::TheConfig.client_username_header |
5473c134 | 5612 | DEFAULT: X-Client-Username |
cccac0a2 | 5613 | DOC_START |
5473c134 | 5614 | ICAP request header name to use for send_client_username. |
cccac0a2 | 5615 | DOC_END |
5616 | ||
5473c134 | 5617 | NAME: icap_client_username_encode |
cccac0a2 | 5618 | TYPE: onoff |
5473c134 | 5619 | IFDEF: ICAP_CLIENT |
5620 | COMMENT: on|off | |
26cc52cb | 5621 | LOC: Adaptation::Icap::TheConfig.client_username_encode |
5473c134 | 5622 | DEFAULT: off |
cccac0a2 | 5623 | DOC_START |
5473c134 | 5624 | Whether to base64 encode the authenticated client username. |
cccac0a2 | 5625 | DOC_END |
5626 | ||
5473c134 | 5627 | NAME: icap_service |
5628 | TYPE: icap_service_type | |
5629 | IFDEF: ICAP_CLIENT | |
26cc52cb | 5630 | LOC: Adaptation::Icap::TheConfig |
5473c134 | 5631 | DEFAULT: none |
cccac0a2 | 5632 | DOC_START |
a22e6cd3 | 5633 | Defines a single ICAP service using the following format: |
cccac0a2 | 5634 | |
a22e6cd3 | 5635 | icap_service service_name vectoring_point [options] service_url |
7d90757b | 5636 | |
a22e6cd3 AR |
5637 | service_name: ID |
5638 | an opaque identifier which must be unique in squid.conf | |
5639 | ||
5640 | vectoring_point: reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache | |
f3db09e2 | 5641 | This specifies at which point of transaction processing the |
5642 | ICAP service should be activated. *_postcache vectoring points | |
5643 | are not yet supported. | |
a22e6cd3 AR |
5644 | |
5645 | service_url: icap://servername:port/servicepath | |
5646 | ICAP server and service location. | |
5647 | ||
5648 | ICAP does not allow a single service to handle both REQMOD and RESPMOD | |
5649 | transactions. Squid does not enforce that requirement. You can specify | |
5650 | services with the same service_url and different vectoring_points. You | |
5651 | can even specify multiple identical services as long as their | |
5652 | service_names differ. | |
5653 | ||
5654 | ||
5655 | Service options are separated by white space. ICAP services support | |
5656 | the following name=value options: | |
5657 | ||
5658 | bypass=on|off|1|0 | |
5659 | If set to 'on' or '1', the ICAP service is treated as | |
5660 | optional. If the service cannot be reached or malfunctions, | |
5661 | Squid will try to ignore any errors and process the message as | |
5662 | if the service was not enabled. No all ICAP errors can be | |
5663 | bypassed. If set to 0, the ICAP service is treated as | |
5664 | essential and all ICAP errors will result in an error page | |
5665 | returned to the HTTP client. | |
5666 | ||
5667 | Bypass is off by default: services are treated as essential. | |
5668 | ||
5669 | routing=on|off|1|0 | |
5670 | If set to 'on' or '1', the ICAP service is allowed to | |
5671 | dynamically change the current message adaptation plan by | |
5672 | returning a chain of services to be used next. The services | |
5673 | are specified using the X-Next-Services ICAP response header | |
5674 | value, formatted as a comma-separated list of service names. | |
5675 | Each named service should be configured in squid.conf and | |
5676 | should have the same method and vectoring point as the current | |
5677 | ICAP transaction. Services violating these rules are ignored. | |
5678 | An empty X-Next-Services value results in an empty plan which | |
5679 | ends the current adaptation. | |
5680 | ||
5681 | Routing is not allowed by default: the ICAP X-Next-Services | |
5682 | response header is ignored. | |
5683 | ||
5684 | Older icap_service format without optional named parameters is | |
5685 | deprecated but supported for backward compatibility. | |
5473c134 | 5686 | |
5473c134 | 5687 | Example: |
a22e6cd3 AR |
5688 | icap_service svcBlocker reqmod_precache bypass=0 icap://icap1.mydomain.net:1344/reqmod |
5689 | icap_service svcLogger reqmod_precache routing=on icap://icap2.mydomain.net:1344/respmod | |
cccac0a2 | 5690 | DOC_END |
5691 | ||
5473c134 | 5692 | NAME: icap_class |
5693 | TYPE: icap_class_type | |
5694 | IFDEF: ICAP_CLIENT | |
21a26d31 | 5695 | LOC: none |
5473c134 | 5696 | DEFAULT: none |
cccac0a2 | 5697 | DOC_START |
a22e6cd3 | 5698 | This deprecated option was documented to define an ICAP service |
62c7f90e AR |
5699 | chain, even though it actually defined a set of similar, redundant |
5700 | services, and the chains were not supported. | |
5473c134 | 5701 | |
62c7f90e | 5702 | To define a set of redundant services, please use the |
a22e6cd3 AR |
5703 | adaptation_service_set directive. For service chains, use |
5704 | adaptation_service_chain. | |
cccac0a2 | 5705 | DOC_END |
5706 | ||
5473c134 | 5707 | NAME: icap_access |
5708 | TYPE: icap_access_type | |
5709 | IFDEF: ICAP_CLIENT | |
21a26d31 | 5710 | LOC: none |
cccac0a2 | 5711 | DEFAULT: none |
cccac0a2 | 5712 | DOC_START |
a22e6cd3 | 5713 | This option is deprecated. Please use adaptation_access, which |
62c7f90e AR |
5714 | has the same ICAP functionality, but comes with better |
5715 | documentation, and eCAP support. | |
cccac0a2 | 5716 | DOC_END |
5717 | ||
57afc994 AR |
5718 | COMMENT_START |
5719 | eCAP OPTIONS | |
5720 | ----------------------------------------------------------------------------- | |
5721 | COMMENT_END | |
5722 | ||
21a26d31 AR |
5723 | NAME: ecap_enable |
5724 | TYPE: onoff | |
5725 | IFDEF: USE_ECAP | |
5726 | COMMENT: on|off | |
574b508c | 5727 | LOC: Adaptation::Ecap::TheConfig.onoff |
21a26d31 AR |
5728 | DEFAULT: off |
5729 | DOC_START | |
5730 | Controls whether eCAP support is enabled. | |
5731 | DOC_END | |
5732 | ||
5733 | NAME: ecap_service | |
5734 | TYPE: ecap_service_type | |
5735 | IFDEF: USE_ECAP | |
574b508c | 5736 | LOC: Adaptation::Ecap::TheConfig |
21a26d31 AR |
5737 | DEFAULT: none |
5738 | DOC_START | |
5739 | Defines a single eCAP service | |
5740 | ||
5741 | ecap_service servicename vectoring_point bypass service_url | |
5742 | ||
5743 | vectoring_point = reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache | |
5744 | This specifies at which point of transaction processing the | |
5745 | eCAP service should be activated. *_postcache vectoring points | |
5746 | are not yet supported. | |
5747 | bypass = 1|0 | |
5748 | If set to 1, the eCAP service is treated as optional. If the | |
5749 | service cannot be reached or malfunctions, Squid will try to | |
5750 | ignore any errors and process the message as if the service | |
5751 | was not enabled. No all eCAP errors can be bypassed. | |
5752 | If set to 0, the eCAP service is treated as essential and all | |
5753 | eCAP errors will result in an error page returned to the | |
5754 | HTTP client. | |
5755 | service_url = ecap://vendor/service_name?custom&cgi=style¶meters=optional | |
5756 | ||
5757 | Example: | |
5758 | ecap_service service_1 reqmod_precache 0 ecap://filters-R-us/leakDetector?on_error=block | |
5759 | ecap_service service_2 respmod_precache 1 icap://filters-R-us/virusFilter?config=/etc/vf.cfg | |
5760 | DOC_END | |
5761 | ||
57afc994 AR |
5762 | NAME: loadable_modules |
5763 | TYPE: wordlist | |
5764 | IFDEF: USE_LOADABLE_MODULES | |
5765 | LOC: Config.loadable_module_names | |
5766 | DEFAULT: none | |
5767 | DOC_START | |
5768 | Instructs Squid to load the specified dynamic module(s) or activate | |
5769 | preloaded module(s). | |
5770 | Example: | |
5771 | loadable_modules @DEFAULT_PREFIX@/lib/MinimalAdapter.so | |
5772 | DOC_END | |
5773 | ||
62c7f90e AR |
5774 | COMMENT_START |
5775 | MESSAGE ADAPTATION OPTIONS | |
5776 | ----------------------------------------------------------------------------- | |
5777 | COMMENT_END | |
5778 | ||
5779 | NAME: adaptation_service_set | |
5780 | TYPE: adaptation_service_set_type | |
5781 | IFDEF: USE_ADAPTATION | |
5782 | LOC: none | |
5783 | DEFAULT: none | |
5784 | DOC_START | |
5785 | ||
a22e6cd3 AR |
5786 | Configures an ordered set of similar, redundant services. This is |
5787 | useful when hot standby or backup adaptation servers are available. | |
5788 | ||
5789 | adaptation_service_set set_name service_name1 service_name2 ... | |
5790 | ||
5791 | The named services are used in the set declaration order. The first | |
5792 | applicable adaptation service from the set is used first. The next | |
5793 | applicable service is tried if and only if the transaction with the | |
5794 | previous service fails and the message waiting to be adapted is still | |
5795 | intact. | |
62c7f90e | 5796 | |
a22e6cd3 AR |
5797 | When adaptation starts, broken services are ignored as if they were |
5798 | not a part of the set. A broken service is a down optional service. | |
62c7f90e | 5799 | |
a22e6cd3 AR |
5800 | The services in a set must be attached to the same vectoring point |
5801 | (e.g., pre-cache) and use the same adaptation method (e.g., REQMOD). | |
5802 | ||
5803 | If all services in a set are optional then adaptation failures are | |
5804 | bypassable. If all services in the set are essential, then a | |
5805 | transaction failure with one service may still be retried using | |
5806 | another service from the set, but when all services fail, the master | |
5807 | transaction fails as well. | |
5808 | ||
5809 | A set may contain a mix of optional and essential services, but that | |
5810 | is likely to lead to surprising results because broken services become | |
5811 | ignored (see above), making previously bypassable failures fatal. | |
5812 | Technically, it is the bypassability of the last failed service that | |
5813 | matters. | |
5814 | ||
5815 | See also: adaptation_access adaptation_service_chain | |
62c7f90e AR |
5816 | |
5817 | Example: | |
5818 | adaptation_service_set svcBlocker urlFilterPrimary urlFilterBackup | |
5819 | adaptation service_set svcLogger loggerLocal loggerRemote | |
5820 | DOC_END | |
5821 | ||
a22e6cd3 AR |
5822 | NAME: adaptation_service_chain |
5823 | TYPE: adaptation_service_chain_type | |
5824 | IFDEF: USE_ADAPTATION | |
5825 | LOC: none | |
5826 | DEFAULT: none | |
5827 | DOC_START | |
5828 | ||
5829 | Configures a list of complementary services that will be applied | |
5830 | one-by-one, forming an adaptation chain or pipeline. This is useful | |
5831 | when Squid must perform different adaptations on the same message. | |
5832 | ||
5833 | adaptation_service_chain chain_name service_name1 svc_name2 ... | |
5834 | ||
5835 | The named services are used in the chain declaration order. The first | |
5836 | applicable adaptation service from the chain is used first. The next | |
5837 | applicable service is applied to the successful adaptation results of | |
5838 | the previous service in the chain. | |
5839 | ||
5840 | When adaptation starts, broken services are ignored as if they were | |
5841 | not a part of the chain. A broken service is a down optional service. | |
5842 | ||
5843 | Request satisfaction terminates the adaptation chain because Squid | |
5844 | does not currently allow declaration of RESPMOD services at the | |
5845 | "reqmod_precache" vectoring point (see icap_service or ecap_service). | |
5846 | ||
5847 | The services in a chain must be attached to the same vectoring point | |
5848 | (e.g., pre-cache) and use the same adaptation method (e.g., REQMOD). | |
5849 | ||
5850 | A chain may contain a mix of optional and essential services. If an | |
5851 | essential adaptation fails (or the failure cannot be bypassed for | |
5852 | other reasons), the master transaction fails. Otherwise, the failure | |
5853 | is bypassed as if the failed adaptation service was not in the chain. | |
5854 | ||
5855 | See also: adaptation_access adaptation_service_set | |
5856 | ||
5857 | Example: | |
5858 | adaptation_service_chain svcRequest requestLogger urlFilter leakDetector | |
5859 | DOC_END | |
5860 | ||
62c7f90e AR |
5861 | NAME: adaptation_access |
5862 | TYPE: adaptation_access_type | |
5863 | IFDEF: USE_ADAPTATION | |
5864 | LOC: none | |
5865 | DEFAULT: none | |
5866 | DOC_START | |
5867 | Sends an HTTP transaction to an ICAP or eCAP adaptation service. | |
5868 | ||
5869 | adaptation_access service_name allow|deny [!]aclname... | |
5870 | adaptation_access set_name allow|deny [!]aclname... | |
5871 | ||
5872 | At each supported vectoring point, the adaptation_access | |
5873 | statements are processed in the order they appear in this | |
5874 | configuration file. Statements pointing to the following services | |
5875 | are ignored (i.e., skipped without checking their ACL): | |
5876 | ||
5877 | - services serving different vectoring points | |
5878 | - "broken-but-bypassable" services | |
5879 | - "up" services configured to ignore such transactions | |
5880 | (e.g., based on the ICAP Transfer-Ignore header). | |
5881 | ||
5882 | When a set_name is used, all services in the set are checked | |
5883 | using the same rules, to find the first applicable one. See | |
5884 | adaptation_service_set for details. | |
5885 | ||
5886 | If an access list is checked and there is a match, the | |
5887 | processing stops: For an "allow" rule, the corresponding | |
5888 | adaptation service is used for the transaction. For a "deny" | |
5889 | rule, no adaptation service is activated. | |
5890 | ||
5891 | It is currently not possible to apply more than one adaptation | |
5892 | service at the same vectoring point to the same HTTP transaction. | |
5893 | ||
5894 | See also: icap_service and ecap_service | |
5895 | ||
5896 | Example: | |
5897 | adaptation_access service_1 allow all | |
5898 | DOC_END | |
5899 | ||
a22e6cd3 AR |
5900 | NAME: adaptation_service_iteration_limit |
5901 | TYPE: int | |
5902 | IFDEF: USE_ADAPTATION | |
5903 | LOC: Adaptation::Config::service_iteration_limit | |
5904 | DEFAULT: 16 | |
5905 | DOC_START | |
5906 | Limits the number of iterations allowed when applying adaptation | |
5907 | services to a message. If your longest adaptation set or chain | |
5908 | may have more than 16 services, increase the limit beyond its | |
5909 | default value of 16. If detecting infinite iteration loops sooner | |
5910 | is critical, make the iteration limit match the actual number | |
5911 | of services in your longest adaptation set or chain. | |
5912 | ||
5913 | Infinite adaptation loops are most likely with routing services. | |
5914 | ||
5915 | See also: icap_service routing=1 | |
5916 | DOC_END | |
5917 | ||
3ff65596 AR |
5918 | NAME: adaptation_masterx_shared_names |
5919 | TYPE: string | |
5920 | IFDEF: USE_ADAPTATION | |
5921 | LOC: Adaptation::Config::masterx_shared_name | |
5922 | DEFAULT: none | |
5923 | DOC_START | |
5924 | For each master transaction (i.e., the HTTP request and response | |
5925 | sequence, including all related ICAP and eCAP exchanges), Squid | |
5926 | maintains a table of metadata. The table entries are (name, value) | |
5927 | pairs shared among eCAP and ICAP exchanges. The table is destroyed | |
5928 | with the master transaction. | |
5929 | ||
5930 | This option specifies the table entry names that Squid must accept | |
5931 | from and forward to the adaptation transactions. | |
5932 | ||
5933 | An ICAP REQMOD or RESPMOD transaction may set an entry in the | |
5934 | shared table by returning an ICAP header field with a name | |
5935 | specified in adaptation_masterx_shared_names. Squid will store | |
5936 | and forward that ICAP header field to subsequent ICAP | |
5937 | transactions within the same master transaction scope. | |
5938 | ||
5939 | Only one shared entry name is supported at this time. | |
5940 | ||
5941 | Example: | |
5942 | # share authentication information among ICAP services | |
5943 | adaptation_masterx_shared_names X-Subscriber-ID | |
5944 | DOC_END | |
5945 | ||
5946 | NAME: icap_retry | |
5947 | TYPE: acl_access | |
5948 | IFDEF: ICAP_CLIENT | |
5949 | LOC: Adaptation::Icap::TheConfig.repeat | |
5950 | DEFAULT: none | |
5951 | DEFAULT_IF_NONE: deny all | |
5952 | DOC_START | |
5953 | This ACL determines which retriable ICAP transactions are | |
5954 | retried. Transactions that received a complete ICAP response | |
5955 | and did not have to consume or produce HTTP bodies to receive | |
5956 | that response are usually retriable. | |
5957 | ||
5958 | icap_retry allow|deny [!]aclname ... | |
5959 | ||
5960 | Squid automatically retries some ICAP I/O timeouts and errors | |
5961 | due to persistent connection race conditions. | |
5962 | ||
5963 | See also: icap_retry_limit | |
5964 | DOC_END | |
5965 | ||
5966 | NAME: icap_retry_limit | |
5967 | TYPE: int | |
5968 | IFDEF: ICAP_CLIENT | |
5969 | LOC: Adaptation::Icap::TheConfig.repeat_limit | |
5970 | DEFAULT: 0 | |
5971 | DOC_START | |
5972 | Limits the number of retries allowed. When set to zero (default), | |
5973 | no retries are allowed. | |
5974 | ||
5975 | Communication errors due to persistent connection race | |
5976 | conditions are unavoidable, automatically retried, and do not | |
5977 | count against this limit. | |
5978 | ||
5979 | See also: icap_retry | |
5980 | DOC_END | |
5981 | ||
5982 | ||
5473c134 | 5983 | COMMENT_START |
5984 | DNS OPTIONS | |
5985 | ----------------------------------------------------------------------------- | |
5986 | COMMENT_END | |
5987 | ||
5988 | NAME: check_hostnames | |
cccac0a2 | 5989 | TYPE: onoff |
cccac0a2 | 5990 | DEFAULT: off |
5473c134 | 5991 | LOC: Config.onoff.check_hostnames |
cccac0a2 | 5992 | DOC_START |
5473c134 | 5993 | For security and stability reasons Squid can check |
5994 | hostnames for Internet standard RFC compliance. If you want | |
5995 | Squid to perform these checks turn this directive on. | |
cccac0a2 | 5996 | DOC_END |
5997 | ||
5473c134 | 5998 | NAME: allow_underscore |
cccac0a2 | 5999 | TYPE: onoff |
cccac0a2 | 6000 | DEFAULT: on |
5473c134 | 6001 | LOC: Config.onoff.allow_underscore |
cccac0a2 | 6002 | DOC_START |
5473c134 | 6003 | Underscore characters is not strictly allowed in Internet hostnames |
6004 | but nevertheless used by many sites. Set this to off if you want | |
6005 | Squid to be strict about the standard. | |
6006 | This check is performed only when check_hostnames is set to on. | |
cccac0a2 | 6007 | DOC_END |
6008 | ||
5473c134 | 6009 | NAME: cache_dns_program |
cccac0a2 | 6010 | TYPE: string |
5473c134 | 6011 | IFDEF: USE_DNSSERVERS |
6012 | DEFAULT: @DEFAULT_DNSSERVER@ | |
6013 | LOC: Config.Program.dnsserver | |
cccac0a2 | 6014 | DOC_START |
5473c134 | 6015 | Specify the location of the executable for dnslookup process. |
cccac0a2 | 6016 | DOC_END |
6017 | ||
5473c134 | 6018 | NAME: dns_children |
6019 | TYPE: int | |
6020 | IFDEF: USE_DNSSERVERS | |
6021 | DEFAULT: 5 | |
6022 | LOC: Config.dnsChildren | |
58850d15 | 6023 | DOC_START |
5473c134 | 6024 | The number of processes spawn to service DNS name lookups. |
6025 | For heavily loaded caches on large servers, you should | |
6026 | probably increase this value to at least 10. The maximum | |
6027 | is 32. The default is 5. | |
58850d15 | 6028 | |
5473c134 | 6029 | You must have at least one dnsserver process. |
58850d15 | 6030 | DOC_END |
6031 | ||
5473c134 | 6032 | NAME: dns_retransmit_interval |
6033 | TYPE: time_t | |
6034 | DEFAULT: 5 seconds | |
6035 | LOC: Config.Timeout.idns_retransmit | |
6036 | IFDEF: !USE_DNSSERVERS | |
cccac0a2 | 6037 | DOC_START |
5473c134 | 6038 | Initial retransmit interval for DNS queries. The interval is |
6039 | doubled each time all configured DNS servers have been tried. | |
cccac0a2 | 6040 | |
cccac0a2 | 6041 | DOC_END |
6042 | ||
5473c134 | 6043 | NAME: dns_timeout |
6044 | TYPE: time_t | |
6045 | DEFAULT: 2 minutes | |
6046 | LOC: Config.Timeout.idns_query | |
6047 | IFDEF: !USE_DNSSERVERS | |
cccac0a2 | 6048 | DOC_START |
5473c134 | 6049 | DNS Query timeout. If no response is received to a DNS query |
6050 | within this time all DNS servers for the queried domain | |
6051 | are assumed to be unavailable. | |
cccac0a2 | 6052 | DOC_END |
6053 | ||
5473c134 | 6054 | NAME: dns_defnames |
6055 | COMMENT: on|off | |
cccac0a2 | 6056 | TYPE: onoff |
cccac0a2 | 6057 | DEFAULT: off |
5473c134 | 6058 | LOC: Config.onoff.res_defnames |
cccac0a2 | 6059 | DOC_START |
5473c134 | 6060 | Normally the RES_DEFNAMES resolver option is disabled |
6061 | (see res_init(3)). This prevents caches in a hierarchy | |
6062 | from interpreting single-component hostnames locally. To allow | |
6063 | Squid to handle single-component names, enable this option. | |
cccac0a2 | 6064 | DOC_END |
6065 | ||
5473c134 | 6066 | NAME: dns_nameservers |
6067 | TYPE: wordlist | |
6068 | DEFAULT: none | |
6069 | LOC: Config.dns_nameservers | |
cccac0a2 | 6070 | DOC_START |
5473c134 | 6071 | Use this if you want to specify a list of DNS name servers |
6072 | (IP addresses) to use instead of those given in your | |
6073 | /etc/resolv.conf file. | |
6074 | On Windows platforms, if no value is specified here or in | |
6075 | the /etc/resolv.conf file, the list of DNS name servers are | |
6076 | taken from the Windows registry, both static and dynamic DHCP | |
6077 | configurations are supported. | |
cccac0a2 | 6078 | |
5473c134 | 6079 | Example: dns_nameservers 10.0.0.1 192.172.0.4 |
cccac0a2 | 6080 | DOC_END |
6081 | ||
5473c134 | 6082 | NAME: hosts_file |
cccac0a2 | 6083 | TYPE: string |
5473c134 | 6084 | DEFAULT: @DEFAULT_HOSTS@ |
6085 | LOC: Config.etcHostsPath | |
cccac0a2 | 6086 | DOC_START |
5473c134 | 6087 | Location of the host-local IP name-address associations |
6088 | database. Most Operating Systems have such a file on different | |
6089 | default locations: | |
6090 | - Un*X & Linux: /etc/hosts | |
6091 | - Windows NT/2000: %SystemRoot%\system32\drivers\etc\hosts | |
6092 | (%SystemRoot% value install default is c:\winnt) | |
6093 | - Windows XP/2003: %SystemRoot%\system32\drivers\etc\hosts | |
6094 | (%SystemRoot% value install default is c:\windows) | |
6095 | - Windows 9x/Me: %windir%\hosts | |
6096 | (%windir% value is usually c:\windows) | |
6097 | - Cygwin: /etc/hosts | |
cccac0a2 | 6098 | |
5473c134 | 6099 | The file contains newline-separated definitions, in the |
6100 | form ip_address_in_dotted_form name [name ...] names are | |
6101 | whitespace-separated. Lines beginning with an hash (#) | |
6102 | character are comments. | |
cccac0a2 | 6103 | |
5473c134 | 6104 | The file is checked at startup and upon configuration. |
6105 | If set to 'none', it won't be checked. | |
6106 | If append_domain is used, that domain will be added to | |
6107 | domain-local (i.e. not containing any dot character) host | |
6108 | definitions. | |
cccac0a2 | 6109 | DOC_END |
6110 | ||
5473c134 | 6111 | NAME: append_domain |
6112 | TYPE: string | |
6113 | LOC: Config.appendDomain | |
6114 | DEFAULT: none | |
6a2f3fcf | 6115 | DOC_START |
5473c134 | 6116 | Appends local domain name to hostnames without any dots in |
6117 | them. append_domain must begin with a period. | |
6118 | ||
6119 | Be warned there are now Internet names with no dots in | |
6120 | them using only top-domain names, so setting this may | |
6121 | cause some Internet sites to become unavailable. | |
6122 | ||
6123 | Example: | |
6124 | append_domain .yourdomain.com | |
6a2f3fcf | 6125 | DOC_END |
6126 | ||
5473c134 | 6127 | NAME: ignore_unknown_nameservers |
6128 | TYPE: onoff | |
6129 | LOC: Config.onoff.ignore_unknown_nameservers | |
df6fd596 | 6130 | DEFAULT: on |
6131 | DOC_START | |
5473c134 | 6132 | By default Squid checks that DNS responses are received |
6133 | from the same IP addresses they are sent to. If they | |
6134 | don't match, Squid ignores the response and writes a warning | |
6135 | message to cache.log. You can allow responses from unknown | |
6136 | nameservers by setting this option to 'off'. | |
df6fd596 | 6137 | DOC_END |
6138 | ||
cc192b50 | 6139 | NAME: dns_v4_fallback |
6140 | TYPE: onoff | |
6141 | DEFAULT: on | |
6142 | LOC: Config.onoff.dns_require_A | |
6143 | DOC_START | |
6144 | Standard practice with DNS is to lookup either A or AAAA records | |
6145 | and use the results if it succeeds. Only looking up the other if | |
6146 | the first attempt fails or otherwise produces no results. | |
6147 | ||
6148 | That policy however will cause squid to produce error pages for some | |
6149 | servers that advertise AAAA but are unreachable over IPv6. | |
6150 | ||
6151 | If this is ON squid will always lookup both AAAA and A, using both. | |
6152 | If this is OFF squid will lookup AAAA and only try A if none found. | |
6153 | ||
6154 | WARNING: There are some possibly unwanted side-effects with this on: | |
6155 | *) Doubles the load placed by squid on the DNS network. | |
6156 | *) May negatively impact connection delay times. | |
6157 | DOC_END | |
6158 | ||
6bc15a4f | 6159 | NAME: ipcache_size |
6160 | COMMENT: (number of entries) | |
6161 | TYPE: int | |
6162 | DEFAULT: 1024 | |
6163 | LOC: Config.ipcache.size | |
6164 | DOC_NONE | |
6165 | ||
6166 | NAME: ipcache_low | |
6167 | COMMENT: (percent) | |
6168 | TYPE: int | |
6169 | DEFAULT: 90 | |
6170 | LOC: Config.ipcache.low | |
6171 | DOC_NONE | |
6172 | ||
6173 | NAME: ipcache_high | |
6174 | COMMENT: (percent) | |
6175 | TYPE: int | |
6176 | DEFAULT: 95 | |
6177 | LOC: Config.ipcache.high | |
6178 | DOC_START | |
6179 | The size, low-, and high-water marks for the IP cache. | |
6180 | DOC_END | |
6181 | ||
6182 | NAME: fqdncache_size | |
6183 | COMMENT: (number of entries) | |
6184 | TYPE: int | |
6185 | DEFAULT: 1024 | |
6186 | LOC: Config.fqdncache.size | |
6187 | DOC_START | |
6188 | Maximum number of FQDN cache entries. | |
6189 | DOC_END | |
6190 | ||
a58ff010 | 6191 | COMMENT_START |
5473c134 | 6192 | MISCELLANEOUS |
a58ff010 | 6193 | ----------------------------------------------------------------------------- |
6194 | COMMENT_END | |
6195 | ||
5473c134 | 6196 | NAME: memory_pools |
a58ff010 | 6197 | COMMENT: on|off |
5473c134 | 6198 | TYPE: onoff |
6199 | DEFAULT: on | |
6200 | LOC: Config.onoff.mem_pools | |
a58ff010 | 6201 | DOC_START |
5473c134 | 6202 | If set, Squid will keep pools of allocated (but unused) memory |
6203 | available for future use. If memory is a premium on your | |
6204 | system and you believe your malloc library outperforms Squid | |
6205 | routines, disable this. | |
a58ff010 | 6206 | DOC_END |
6207 | ||
5473c134 | 6208 | NAME: memory_pools_limit |
6209 | COMMENT: (bytes) | |
6210 | TYPE: b_size_t | |
6211 | DEFAULT: 5 MB | |
6212 | LOC: Config.MemPools.limit | |
ec1245f8 | 6213 | DOC_START |
5473c134 | 6214 | Used only with memory_pools on: |
6215 | memory_pools_limit 50 MB | |
ec1245f8 | 6216 | |
5473c134 | 6217 | If set to a non-zero value, Squid will keep at most the specified |
6218 | limit of allocated (but unused) memory in memory pools. All free() | |
6219 | requests that exceed this limit will be handled by your malloc | |
6220 | library. Squid does not pre-allocate any memory, just safe-keeps | |
6221 | objects that otherwise would be free()d. Thus, it is safe to set | |
6222 | memory_pools_limit to a reasonably high value even if your | |
6223 | configuration will use less memory. | |
ec1245f8 | 6224 | |
5473c134 | 6225 | If set to zero, Squid will keep all memory it can. That is, there |
6226 | will be no limit on the total amount of memory used for safe-keeping. | |
ec1245f8 | 6227 | |
5473c134 | 6228 | To disable memory allocation optimization, do not set |
6229 | memory_pools_limit to 0. Set memory_pools to "off" instead. | |
6230 | ||
6231 | An overhead for maintaining memory pools is not taken into account | |
6232 | when the limit is checked. This overhead is close to four bytes per | |
6233 | object kept. However, pools may actually _save_ memory because of | |
6234 | reduced memory thrashing in your malloc library. | |
ec1245f8 | 6235 | DOC_END |
6236 | ||
5473c134 | 6237 | NAME: forwarded_for |
67c06f0d AJ |
6238 | COMMENT: on|off|transparent|truncate|delete |
6239 | TYPE: string | |
5473c134 | 6240 | DEFAULT: on |
6241 | LOC: opt_forwarded_for | |
5f8252d2 | 6242 | DOC_START |
67c06f0d AJ |
6243 | If set to "on", Squid will append your client's IP address |
6244 | in the HTTP requests it forwards. By default it looks like: | |
5f8252d2 | 6245 | |
5473c134 | 6246 | X-Forwarded-For: 192.1.2.3 |
6247 | ||
67c06f0d | 6248 | If set to "off", it will appear as |
5473c134 | 6249 | |
6250 | X-Forwarded-For: unknown | |
67c06f0d AJ |
6251 | |
6252 | If set to "transparent", Squid will not alter the | |
6253 | X-Forwarded-For header in any way. | |
6254 | ||
6255 | If set to "delete", Squid will delete the entire | |
6256 | X-Forwarded-For header. | |
6257 | ||
6258 | If set to "truncate", Squid will remove all existing | |
6259 | X-Forwarded-For entries, and place itself as the sole entry. | |
5f8252d2 | 6260 | DOC_END |
6261 | ||
5473c134 | 6262 | NAME: cachemgr_passwd |
6263 | TYPE: cachemgrpasswd | |
6264 | DEFAULT: none | |
6265 | LOC: Config.passwd_list | |
5f8252d2 | 6266 | DOC_START |
5473c134 | 6267 | Specify passwords for cachemgr operations. |
5f8252d2 | 6268 | |
5473c134 | 6269 | Usage: cachemgr_passwd password action action ... |
6270 | ||
6271 | Some valid actions are (see cache manager menu for a full list): | |
6272 | 5min | |
6273 | 60min | |
6274 | asndb | |
6275 | authenticator | |
6276 | cbdata | |
6277 | client_list | |
6278 | comm_incoming | |
6279 | config * | |
6280 | counters | |
6281 | delay | |
6282 | digest_stats | |
6283 | dns | |
6284 | events | |
6285 | filedescriptors | |
6286 | fqdncache | |
6287 | histograms | |
6288 | http_headers | |
6289 | info | |
6290 | io | |
6291 | ipcache | |
6292 | mem | |
6293 | menu | |
6294 | netdb | |
6295 | non_peers | |
6296 | objects | |
6297 | offline_toggle * | |
6298 | pconn | |
6299 | peer_select | |
b360c477 | 6300 | reconfigure * |
5473c134 | 6301 | redirector |
6302 | refresh | |
6303 | server_list | |
6304 | shutdown * | |
6305 | store_digest | |
6306 | storedir | |
6307 | utilization | |
6308 | via_headers | |
6309 | vm_objects | |
6310 | ||
6311 | * Indicates actions which will not be performed without a | |
6312 | valid password, others can be performed if not listed here. | |
6313 | ||
6314 | To disable an action, set the password to "disable". | |
6315 | To allow performing an action without a password, set the | |
6316 | password to "none". | |
6317 | ||
6318 | Use the keyword "all" to set the same password for all actions. | |
6319 | ||
6320 | Example: | |
6321 | cachemgr_passwd secret shutdown | |
6322 | cachemgr_passwd lesssssssecret info stats/objects | |
6323 | cachemgr_passwd disable all | |
5f8252d2 | 6324 | DOC_END |
6325 | ||
5473c134 | 6326 | NAME: client_db |
a58ff010 | 6327 | COMMENT: on|off |
5473c134 | 6328 | TYPE: onoff |
6329 | DEFAULT: on | |
6330 | LOC: Config.onoff.client_db | |
a58ff010 | 6331 | DOC_START |
5473c134 | 6332 | If you want to disable collecting per-client statistics, |
6333 | turn off client_db here. | |
a58ff010 | 6334 | DOC_END |
6335 | ||
5473c134 | 6336 | NAME: refresh_all_ims |
6337 | COMMENT: on|off | |
6338 | TYPE: onoff | |
6339 | DEFAULT: off | |
6340 | LOC: Config.onoff.refresh_all_ims | |
a58ff010 | 6341 | DOC_START |
5473c134 | 6342 | When you enable this option, squid will always check |
6343 | the origin server for an update when a client sends an | |
6344 | If-Modified-Since request. Many browsers use IMS | |
6345 | requests when the user requests a reload, and this | |
6346 | ensures those clients receive the latest version. | |
a58ff010 | 6347 | |
5473c134 | 6348 | By default (off), squid may return a Not Modified response |
6349 | based on the age of the cached version. | |
78e8cfc4 | 6350 | DOC_END |
6351 | ||
5473c134 | 6352 | NAME: reload_into_ims |
6353 | IFDEF: HTTP_VIOLATIONS | |
12b91c99 | 6354 | COMMENT: on|off |
5473c134 | 6355 | TYPE: onoff |
6356 | DEFAULT: off | |
6357 | LOC: Config.onoff.reload_into_ims | |
12b91c99 | 6358 | DOC_START |
5473c134 | 6359 | When you enable this option, client no-cache or ``reload'' |
6360 | requests will be changed to If-Modified-Since requests. | |
6361 | Doing this VIOLATES the HTTP standard. Enabling this | |
6362 | feature could make you liable for problems which it | |
6363 | causes. | |
6364 | ||
6365 | see also refresh_pattern for a more selective approach. | |
12b91c99 | 6366 | DOC_END |
6367 | ||
5473c134 | 6368 | NAME: maximum_single_addr_tries |
6369 | TYPE: int | |
6370 | LOC: Config.retry.maxtries | |
6371 | DEFAULT: 1 | |
a58ff010 | 6372 | DOC_START |
5473c134 | 6373 | This sets the maximum number of connection attempts for a |
6374 | host that only has one address (for multiple-address hosts, | |
6375 | each address is tried once). | |
6376 | ||
6377 | The default value is one attempt, the (not recommended) | |
6378 | maximum is 255 tries. A warning message will be generated | |
6379 | if it is set to a value greater than ten. | |
6380 | ||
6381 | Note: This is in addition to the request re-forwarding which | |
6382 | takes place if Squid fails to get a satisfying response. | |
a58ff010 | 6383 | DOC_END |
6384 | ||
5473c134 | 6385 | NAME: retry_on_error |
a58ff010 | 6386 | TYPE: onoff |
5473c134 | 6387 | LOC: Config.retry.onerror |
a58ff010 | 6388 | DEFAULT: off |
6389 | DOC_START | |
5473c134 | 6390 | If set to on Squid will automatically retry requests when |
6391 | receiving an error response. This is mainly useful if you | |
6392 | are in a complex cache hierarchy to work around access | |
6393 | control errors. | |
5f8252d2 | 6394 | DOC_END |
6395 | ||
5473c134 | 6396 | NAME: as_whois_server |
5f8252d2 | 6397 | TYPE: string |
5473c134 | 6398 | LOC: Config.as_whois_server |
6399 | DEFAULT: whois.ra.net | |
6400 | DEFAULT_IF_NONE: whois.ra.net | |
5f8252d2 | 6401 | DOC_START |
5473c134 | 6402 | WHOIS server to query for AS numbers. NOTE: AS numbers are |
6403 | queried only when Squid starts up, not for every request. | |
5f8252d2 | 6404 | DOC_END |
6405 | ||
5473c134 | 6406 | NAME: offline_mode |
5f8252d2 | 6407 | TYPE: onoff |
5473c134 | 6408 | LOC: Config.onoff.offline |
5f8252d2 | 6409 | DEFAULT: off |
6410 | DOC_START | |
5473c134 | 6411 | Enable this option and Squid will never try to validate cached |
6412 | objects. | |
a58ff010 | 6413 | DOC_END |
6414 | ||
5473c134 | 6415 | NAME: uri_whitespace |
6416 | TYPE: uri_whitespace | |
6417 | LOC: Config.uri_whitespace | |
6418 | DEFAULT: strip | |
a58ff010 | 6419 | DOC_START |
5473c134 | 6420 | What to do with requests that have whitespace characters in the |
6421 | URI. Options: | |
a58ff010 | 6422 | |
5473c134 | 6423 | strip: The whitespace characters are stripped out of the URL. |
6424 | This is the behavior recommended by RFC2396. | |
6425 | deny: The request is denied. The user receives an "Invalid | |
6426 | Request" message. | |
6427 | allow: The request is allowed and the URI is not changed. The | |
6428 | whitespace characters remain in the URI. Note the | |
6429 | whitespace is passed to redirector processes if they | |
6430 | are in use. | |
6431 | encode: The request is allowed and the whitespace characters are | |
6432 | encoded according to RFC1738. This could be considered | |
6433 | a violation of the HTTP/1.1 | |
6434 | RFC because proxies are not allowed to rewrite URI's. | |
6435 | chop: The request is allowed and the URI is chopped at the | |
6436 | first whitespace. This might also be considered a | |
6437 | violation. | |
6438 | DOC_END | |
a58ff010 | 6439 | |
5473c134 | 6440 | NAME: chroot |
6441 | TYPE: string | |
6442 | LOC: Config.chroot_dir | |
a58ff010 | 6443 | DEFAULT: none |
6444 | DOC_START | |
5473c134 | 6445 | Use this to have Squid do a chroot() while initializing. This |
6446 | also causes Squid to fully drop root privileges after | |
6447 | initializing. This means, for example, if you use a HTTP | |
6448 | port less than 1024 and try to reconfigure, you will may get an | |
6449 | error saying that Squid can not open the port. | |
6450 | DOC_END | |
a58ff010 | 6451 | |
5473c134 | 6452 | NAME: balance_on_multiple_ip |
6453 | TYPE: onoff | |
6454 | LOC: Config.onoff.balance_on_multiple_ip | |
cc192b50 | 6455 | DEFAULT: off |
5473c134 | 6456 | DOC_START |
cc192b50 | 6457 | Modern IP resolvers in squid sort lookup results by preferred access. |
6458 | By default squid will use these IP in order and only rotates to | |
6459 | the next listed when the most preffered fails. | |
6460 | ||
5473c134 | 6461 | Some load balancing servers based on round robin DNS have been |
6462 | found not to preserve user session state across requests | |
6463 | to different IP addresses. | |
a58ff010 | 6464 | |
cc192b50 | 6465 | Enabling this directive Squid rotates IP's per request. |
a58ff010 | 6466 | DOC_END |
6467 | ||
5473c134 | 6468 | NAME: pipeline_prefetch |
6469 | TYPE: onoff | |
6470 | LOC: Config.onoff.pipeline_prefetch | |
6471 | DEFAULT: off | |
a58ff010 | 6472 | DOC_START |
5473c134 | 6473 | To boost the performance of pipelined requests to closer |
6474 | match that of a non-proxied environment Squid can try to fetch | |
6475 | up to two requests in parallel from a pipeline. | |
a58ff010 | 6476 | |
5473c134 | 6477 | Defaults to off for bandwidth management and access logging |
6478 | reasons. | |
6479 | DOC_END | |
a58ff010 | 6480 | |
5473c134 | 6481 | NAME: high_response_time_warning |
6482 | TYPE: int | |
6483 | COMMENT: (msec) | |
6484 | LOC: Config.warnings.high_rptm | |
6485 | DEFAULT: 0 | |
6486 | DOC_START | |
6487 | If the one-minute median response time exceeds this value, | |
6488 | Squid prints a WARNING with debug level 0 to get the | |
6489 | administrators attention. The value is in milliseconds. | |
a58ff010 | 6490 | DOC_END |
6491 | ||
5473c134 | 6492 | NAME: high_page_fault_warning |
6493 | TYPE: int | |
6494 | LOC: Config.warnings.high_pf | |
6495 | DEFAULT: 0 | |
cc9f92d4 | 6496 | DOC_START |
5473c134 | 6497 | If the one-minute average page fault rate exceeds this |
6498 | value, Squid prints a WARNING with debug level 0 to get | |
6499 | the administrators attention. The value is in page faults | |
6500 | per second. | |
6501 | DOC_END | |
cc9f92d4 | 6502 | |
5473c134 | 6503 | NAME: high_memory_warning |
6504 | TYPE: b_size_t | |
6505 | LOC: Config.warnings.high_memory | |
904971da | 6506 | DEFAULT: 0 KB |
5473c134 | 6507 | DOC_START |
6508 | If the memory usage (as determined by mallinfo) exceeds | |
904971da | 6509 | this amount, Squid prints a WARNING with debug level 0 to get |
5473c134 | 6510 | the administrators attention. |
6511 | DOC_END | |
cc9f92d4 | 6512 | |
5473c134 | 6513 | NAME: sleep_after_fork |
6514 | COMMENT: (microseconds) | |
6515 | TYPE: int | |
6516 | LOC: Config.sleep_after_fork | |
6517 | DEFAULT: 0 | |
6518 | DOC_START | |
6519 | When this is set to a non-zero value, the main Squid process | |
6520 | sleeps the specified number of microseconds after a fork() | |
6521 | system call. This sleep may help the situation where your | |
6522 | system reports fork() failures due to lack of (virtual) | |
6523 | memory. Note, however, if you have a lot of child | |
6524 | processes, these sleep delays will add up and your | |
6525 | Squid will not service requests for some amount of time | |
6526 | until all the child processes have been started. | |
6527 | On Windows value less then 1000 (1 milliseconds) are | |
6528 | rounded to 1000. | |
cc9f92d4 | 6529 | DOC_END |
6530 | ||
b6696974 | 6531 | NAME: windows_ipaddrchangemonitor |
6b0516c6 | 6532 | IFDEF: _SQUID_MSWIN_ |
b6696974 GS |
6533 | COMMENT: on|off |
6534 | TYPE: onoff | |
6535 | DEFAULT: on | |
6536 | LOC: Config.onoff.WIN32_IpAddrChangeMonitor | |
6537 | DOC_START | |
6538 | On Windows Squid by default will monitor IP address changes and will | |
6539 | reconfigure itself after any detected event. This is very useful for | |
6540 | proxies connected to internet with dial-up interfaces. | |
6541 | In some cases (a Proxy server acting as VPN gateway is one) it could be | |
6542 | desiderable to disable this behaviour setting this to 'off'. | |
6543 | Note: after changing this, Squid service must be restarted. | |
6544 | DOC_END | |
6545 | ||
cccac0a2 | 6546 | EOF |