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1 | <!doctype linuxdoc system> |
2 | <article> | |
81bf66f8 | 3 | <title>Squid 4.0.7 release notes</title> |
4d0832d7 AJ |
4 | <author>Squid Developers</author> |
5 | ||
6 | <abstract> | |
183b876f | 7 | This document contains the release notes for version 4 of Squid. |
4d0832d7 AJ |
8 | Squid is a WWW Cache application developed by the National Laboratory |
9 | for Applied Network Research and members of the Web Caching community. | |
10 | </abstract> | |
11 | ||
12 | <toc> | |
13 | ||
14 | <sect>Notice | |
81bf66f8 | 15 | <p>The Squid Team are pleased to announce the release of Squid-4.0.7 for testing. |
4d0832d7 | 16 | |
183b876f | 17 | This new release is available for download from <url url="http://www.squid-cache.org/Versions/v4/"> or the |
71f0186a | 18 | <url url="http://www.squid-cache.org/Download/http-mirrors.html" name="mirrors">. |
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19 | |
20 | <p>While this release is not deemed ready for production use, we believe it is ready for wider testing by the community. | |
21 | ||
22 | <p>We welcome feedback and bug reports. If you find a bug, please see <url url="http://wiki.squid-cache.org/SquidFaq/BugReporting"> | |
23 | for how to submit a report with a stack trace. | |
24 | ||
25 | <sect1>Known issues | |
4dd2c9d6 | 26 | <p>Although this release is deemed good enough for use in many setups, please note the existence of |
183b876f | 27 | <url url="http://bugs.squid-cache.org/buglist.cgi?query_format=advanced&product=Squid&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&version=4" name="open bugs against Squid-4">. |
4d0832d7 | 28 | |
1377f2b1 | 29 | <p>This release adds a dependency on C++11 support in any compiler used to build Squid. |
4dd2c9d6 | 30 | As a result older C++03 -only and most C++0x compilers will no longer build successfully. |
a9d17dfc | 31 | GCC 4.9+ and Clang 3.5+ are known to have working C++11 support and are usable. |
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32 | GCC-4.8 will also build for now despite lack of full C++11 support, but some future features may not be available. |
33 | ||
183b876f | 34 | <sect1>Changes since earlier releases of Squid-4 |
4d0832d7 | 35 | <p> |
183b876f | 36 | The Squid-4 change history can be <url url="http://www.squid-cache.org/Versions/v4/changesets/" name="viewed here">. |
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37 | |
38 | ||
39 | <sect>Major new features since Squid-3.5 | |
183b876f | 40 | <p>Squid 4 represents a new feature release above 3.5. |
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41 | |
42 | <p>The most important of these new features are: | |
43 | <itemize> | |
9a258777 | 44 | <item>Configurable helper queue size |
1377f2b1 | 45 | <item>Helper concurrency channels changes |
0e5c14da | 46 | <item>SSL support removal |
b817c20f | 47 | <item>Helper Binary Changes |
4dd2c9d6 | 48 | <item>Secure ICAP |
4dd2c9d6 | 49 | <item>Improved SMP support |
fbcef294 | 50 | <item>Improved process management |
4d0832d7 AJ |
51 | </itemize> |
52 | ||
53 | Most user-facing changes are reflected in squid.conf (see below). | |
54 | ||
55 | ||
6825b101 CT |
56 | <sect1>Configurable helper queue size |
57 | <p>The new queue-size=N option to helpers configuration, allows users | |
4dd2c9d6 | 58 | to configure the maximum number of queued requests to busy helpers. |
4d0832d7 | 59 | |
32fd6d8a | 60 | <sect1>Helper concurrency channels changes |
4dd2c9d6 AJ |
61 | <p>helper-mux.pl we have been distributing for the past few years to |
62 | encourage use of concurrency is no longer compatible with Squid. If | |
63 | used it will spawn up to 2^64 helpers and DoS the Squid server. | |
64 | ||
65 | <p>Helpers utilizing arrays to handle fixed amounts of concurrency | |
66 | channels MUST be re-written to use queues and capable of handling a | |
67 | 64-bit int as index or they will be vulnerable to buffer overrun and | |
68 | arbitrary memory accesses. | |
32fd6d8a | 69 | |
4dd2c9d6 AJ |
70 | <p>32-bit helpers need re-writing to handle the concurrency channel ID |
71 | as a 64-bit integer value. If not updated they will cause proxies to | |
72 | return unexpected results or timeout once crossing the 32-bit wrap | |
73 | boundary. Leading to undefined behaviour in the client HTTP traffic. | |
32fd6d8a | 74 | |
9a258777 | 75 | |
0e5c14da | 76 | <sect1>SSL support removal |
9a258777 | 77 | <p>Details in <url url="https://tools.ietf.org/html/rfc6176" name="RFC 6176"> |
0e5c14da | 78 | and <url url="https://tools.ietf.org/html/rfc7568" name="RFC 7568"> |
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79 | |
80 | <p>SSLv2 is not fit for purpose. Squid no longer supports being configured with | |
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81 | any settings regarding this protocol. That includes settings manually disabling |
82 | its use since it is now forced to disable by default. Also settings enabling | |
83 | various client/server workarounds specific to SSLv2 are removed. | |
9a258777 | 84 | |
0e5c14da | 85 | <p>SSLv3 is not fit for purpose. Squid still accepts configuration, but use |
4dd2c9d6 AJ |
86 | is deprecated and will be removed entirely in a future version. |
87 | Squid default behavour is to follow the TLS built in negotiation mechanism | |
88 | which prefers the latest TLS version. But also to accept downgrades to SSLv3. | |
89 | Use <em>tls-options=NO_SSLv3</em> to disable SSLv3 support completely. | |
0e5c14da | 90 | |
4dd2c9d6 AJ |
91 | <p>A new option <em>tls-min-version=1.N</em> is added in place of <em>sslversion=</em> |
92 | to configure the minimum version the TLS negotiation will allow to be used | |
93 | when an old TLS version is requested by the remote endpoint. | |
9a258777 | 94 | |
435c72b0 AJ |
95 | <p>The system Trusted CAs are no longer used by default when verifying client |
96 | certificates. The <em>cafile=</em> option should be used instead to load | |
97 | the specific CA which signed acceptible client certificates explicitly, | |
98 | even if that CA is one of the system Trusted CAs. | |
99 | The <em>tls-default-ca</em> option can be used to restore the old | |
100 | behaviour explicitly if needed. | |
101 | ||
8f0e29d2 | 102 | |
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103 | <sect1>Helper Binary Changes |
104 | <p>The <em>basic_msnt_multi_domain_auth</em> helper has been removed. The | |
105 | <em>basic_smb_lm_auth</em> helper performs the same actions without extra | |
106 | Perl and Samba dependencies. | |
107 | ||
e90ce3d1 | 108 | <p>The <em>cert_valid.pl</em> testing helper has been renamed to |
bbf79f12 | 109 | <em>security_fake_certverify</em>, reflecting the Squid helper naming schema |
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110 | and that it does not actually perform any certificate checks. |
111 | ||
8732ea9d AJ |
112 | <p>The <em>security_fake_certverify</em> helper is also now built and installed |
113 | by default. It is written in Perl so does not require OpenSSL dependencies | |
114 | for installation. But does use the Perl Crypt::OpenSSL::X509 module for execution. | |
115 | Building the helper can be controlled using the <em>--enable-security-cert-validators="fake"</em> | |
116 | option. | |
117 | ||
cb0b3d63 AJ |
118 | <p>The <em>ssl_crtd</em> helper has been renamed to <em>security_file_certgen</em> |
119 | and is now built and installed by default whenever OpenSSL support is enabled. | |
120 | Building the helper can be controlled using the <em>--enable-security-cert-generators="file"</em> | |
121 | option. | |
122 | NOTE: The <em>--enable-ssl-crtd</em> option is still required to enable the | |
123 | <em>sslcrtd_program</em> helper interface within Squid that uses the helper. | |
124 | ||
b817c20f AJ |
125 | <p>The <em>ntlm_smb_lm_auth</em> helper is now built using <em>--enable-auth-ntlm="SMB_LM"</em>. |
126 | Notice the upper case where it was previously a (wrongly) lower cased acronym. | |
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127 | |
128 | ||
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129 | <sect1>Secure ICAP |
130 | <p>ICAP services can now be used over TLS connections. | |
131 | ||
132 | <p>To mark an ICAP service as secure, use an <em>icaps://</em> service URI scheme when | |
133 | listing your service via an icap_service directive. The industry is using a | |
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134 | <em>Secure ICAP</em> term, and Squid follows that convention, but <em>icaps</em> seems more |
135 | appropriate for a <em>scheme</em> name. | |
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136 | |
137 | <p>Squid uses <em>port 11344</em> for Secure ICAP by default, following another popular | |
138 | proxy convention. The old 1344 default for plain ICAP ports has not changed. | |
139 | ||
140 | ||
4dd2c9d6 AJ |
141 | <sect1>Improved SMP support |
142 | <p>Use of C++11 atomic operations instead of GNU atomics allows a wider range of | |
143 | operating systems and compilers to build Squid SMP and multi-process features. | |
144 | However this does require a C++11 or C++0x compiler with a recent version of | |
145 | the C++ standard library. | |
146 | ||
147 | <p>IpcIo and Mmapped disk I/O modules are now auto-detected properly which | |
148 | enables Rock storage on more systems by default than previously. | |
149 | ||
150 | ||
fbcef294 AJ |
151 | <sect1>Improved process management |
152 | <p>Squid is traditionally refered to as a daemon. But is actually a combination | |
153 | of daemon and daemon manager processes. This has caused significant problems | |
154 | integrating it with other third-party daemon managers. | |
155 | ||
156 | <p>The Squid process which places its PID into the squid.pid file has always | |
157 | been the process to which control signals are sent. The manager process is | |
df200055 MM |
158 | now taking on signal handling instead of the main daemon process. Enabling |
159 | integration with daemon managers such as Upstart or systemd which assume the | |
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160 | process they initiated is the daemon with a PID to control. |
161 | ||
162 | <p>The squid binary now has a new <em>--foreground</em> command line option | |
163 | which prevents the process from exiting early while background workers | |
164 | continue their processing. When run with this option Squid will now wait | |
165 | for the worker(s) to finish before exiting. Unlike the old <em>-N</em> option | |
166 | <em>--foreground</em> supports SMP workers and multi-process features. | |
df200055 MM |
167 | <em>--foreground</em> is particularly useful for use with <em>-z</em> (disk |
168 | cache structures creation), as it allows the caller to wait until Squid has | |
169 | finished. | |
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170 | |
171 | ||
4d0832d7 AJ |
172 | <sect>Changes to squid.conf since Squid-3.5 |
173 | <p> | |
174 | There have been changes to Squid's configuration file since Squid-3.5. | |
175 | ||
176 | This section gives a thorough account of those changes in three categories: | |
177 | ||
178 | <itemize> | |
179 | <item><ref id="newtags" name="New tags"> | |
180 | <item><ref id="modifiedtags" name="Changes to existing tags"> | |
181 | <item><ref id="removedtags" name="Removed tags"> | |
182 | </itemize> | |
183 | <p> | |
184 | ||
185 | <sect1>New tags<label id="newtags"> | |
186 | <p> | |
187 | <descrip> | |
fbf7b67f AJ |
188 | <tag>collapsed_forwarding_shared_entries_limit</tag> |
189 | <p>New directive to limit the size of a table used for sharing information | |
190 | about collapsible entries among SMP workers. | |
191 | ||
cde8f31b NH |
192 | <tag>reply_header_add</tag> |
193 | <p>New directive to add header fields to outgoing HTTP responses to | |
194 | the client. | |
195 | ||
fbf7b67f AJ |
196 | <tag>server_pconn_for_nonretriable</tag> |
197 | <p>New directive to provide fine-grained control over persistent connection | |
198 | reuse when forwarding HTTP requests that Squid cannot retry. It is useful | |
199 | in environments where opening new connections is very expensive | |
200 | and race conditions associated with persistent connections are very rare | |
201 | and/or only cause minor problems. | |
202 | ||
7e62a74f | 203 | <tag>tls_outgoing_options</tag> |
0461fde7 | 204 | <p>New directive to define TLS security context options for outgoing |
7e62a74f | 205 | connections. For example to HTTPS servers. |
4d0832d7 | 206 | |
ff5d59eb AJ |
207 | <tag>url_rewrite_timeout</tag> |
208 | <p>Squid times active requests to redirector. This option sets | |
209 | the timeout value and the Squid reaction to a timed out | |
210 | request. | |
211 | ||
4d0832d7 AJ |
212 | </descrip> |
213 | ||
214 | <sect1>Changes to existing tags<label id="modifiedtags"> | |
215 | <p> | |
216 | <descrip> | |
0461fde7 AJ |
217 | <tag>acl</tag> |
218 | <p>New <em>-m</em> flag for <em>note</em> ACL to match substrings. | |
219 | ||
9a258777 AJ |
220 | <tag>auth_param</tag> |
221 | <p>New parameter <em>queue-size=</em> to set the maximum number | |
222 | of queued requests. | |
223 | ||
224 | <tag>cache_peer</tag> | |
9825b398 AJ |
225 | <p>New option <em>auth-no-keytab</em> to let GSSAPI implementation determine |
226 | which Kerberos credentials to use, instead of specifying a keytab. | |
1cc44095 | 227 | <p>New option <em>tls-min-version=1.N</em> to set minimum TLS version allowed. |
435c72b0 | 228 | <p>New option <em>tls-default-ca</em> replaces <em>sslflags=NO_DEFAULT_CA</em> |
b05d749d | 229 | <p>New option <em>tls-no-npn</em> to disable sending TLS NPN extension. |
0e5c14da AJ |
230 | <p>All <em>ssloptions=</em> values for SSLv2 configuration or disabling |
231 | have been removed. | |
232 | <p>Removed <em>sslversion=</em> option. Use <em>tls-options=</em> instead. | |
9a258777 | 233 | <p>Manual squid.conf update may be required on upgrade. |
b0769ee3 | 234 | <p>Replaced <em>sslcafile=</em> with <em>tls-cafile=</em> which takes multiple entries. |
9a258777 | 235 | |
183b876f | 236 | <tag>external_acl_type</tag> |
9a258777 AJ |
237 | <p>New parameter <em>queue-size=</em> to set the maximum number |
238 | of queued requests. | |
1243ec71 | 239 | <p>Format field updated to accept any logformat %macro code. |
9a258777 AJ |
240 | |
241 | <tag>http_port</tag> | |
0e5c14da | 242 | <p>New option <em>tls-min-version=1.N</em> to set minimum TLS version allowed. |
435c72b0 | 243 | <p>New option <em>tls-default-ca</em> replaces <em>sslflags=NO_DEFAULT_CA</em> |
b05d749d | 244 | <p>New option <em>tls-no-npn</em> to disable sending TLS NPN extension. |
0e5c14da AJ |
245 | <p>All <em>option=</em> values for SSLv2 configuration or disabling |
246 | have been removed. | |
247 | <p>Removed <em>version=</em> option. Use <em>tls-options=</em> instead. | |
9a258777 | 248 | <p>Manual squid.conf update may be required on upgrade. |
b0769ee3 | 249 | <p>Replaced <em>cafile=</em> with <em>tls-cafile=</em> which takes multiple entries. |
435c72b0 AJ |
250 | <p>New option <em>tls-default-ca</em> replaces <em>sslflags=NO_DEFAULT_CA</em>, |
251 | the default is also changed to OFF. | |
9a258777 AJ |
252 | |
253 | <tag>https_port</tag> | |
0e5c14da | 254 | <p>New option <em>tls-min-version=1.N</em> to set minimum TLS version allowed. |
435c72b0 AJ |
255 | <p>New option <em>tls-default-ca</em> replaces <em>sslflags=NO_DEFAULT_CA</em>, |
256 | the default is also changed to OFF. | |
b05d749d | 257 | <p>New option <em>tls-no-npn</em> to disable sending TLS NPN extension. |
1cc44095 | 258 | <p>All <em>options=</em> values for SSLv2 |
9a258777 | 259 | configuration or disabling have been removed. |
0e5c14da | 260 | <p>Removed <em>version=</em> option. Use <em>tls-options=</em> instead. |
9a258777 | 261 | <p>Manual squid.conf update may be required on upgrade. |
b0769ee3 | 262 | <p>Replaced <em>cafile=</em> with <em>tls-cafile=</em> which takes multiple entries. |
9a258777 | 263 | |
4dd2c9d6 AJ |
264 | <tag>icap_service</tag> |
265 | <p>New scheme <em>icaps://</em> to enable TLS/SSL connections to Secure ICAP | |
266 | servers on port 11344. | |
267 | <p>New <em>tls-cert=</em> option to set TLS client certificate to use. | |
268 | <p>New <em>tls-key=</em> option to set TLS private key matching the client | |
269 | certificate used. | |
270 | <p>New <em>tls-min-version=1.N</em> option to set minimum TLS version allowed | |
271 | on server connections. | |
272 | <p>New <em>tls-options=</em> option to set OpenSSL library parameters. | |
273 | <p>New <em>tls-flags=</em> option to set flags modifying Squid TLS operations. | |
274 | <p>New <em>tls-cipher=</em> option to set a list of ciphers permitted. | |
275 | <p>New <em>tls-cafile=</em> option to set a file with additional CA | |
276 | certificate(s) to verify the server certificate. | |
277 | <p>New <em>tls-crlfile=</em> option to set a file with a CRL to verify the | |
278 | server certificate. | |
435c72b0 AJ |
279 | <p>New <em>tls-default-ca</em> option to use the system Trusted CAs to |
280 | verify the server certificate. | |
4dd2c9d6 AJ |
281 | <p>New <em>tls-domain=</em> option to verify the server certificate domain. |
282 | ||
c28b9a0e | 283 | <tag>logformat</tag> |
0461fde7 AJ |
284 | <p>New code <em>%ssl::<cert_errors</em> to display server |
285 | certificate errors. | |
286 | <p>New code <em>%ssl::>negotiated_version</em> to display | |
287 | negotiated TLS version of the client connection. | |
288 | <p>New code <em>%ssl::<negotiated_version</em> to display | |
289 | negotiated TLS version of the last server or peer connection. | |
290 | <p>New code <em>%ssl::>received_hello_version</em> to display the | |
291 | TLS version of the Hello message received from TLS client. | |
292 | <p>New code <em>%ssl::<received_hello_version</em> to display the | |
293 | TLS version of the Hello message received from TLS server. | |
294 | <p>New code <em>%ssl::>received_supported_version</em> to display | |
295 | the maximum TLS version supported by the TLS client. | |
296 | <p>New code <em>%ssl::<received_supported_version</em> to display | |
297 | the maximum TLS version supported by the TLS server. | |
298 | <p>New code <em>%ssl::>negotiated_cipher</em> to display the | |
299 | negotiated cipher of the client connection. | |
300 | <p>New code <em>%ssl::<negotiated_cipher</em> to display the | |
301 | negotiated cipher of the last server or peer connection. | |
c28b9a0e AJ |
302 | |
303 | <tag>pid_filename</tag> | |
304 | <p>Default value now based on squid -n command line parameter. | |
305 | ||
064679ea | 306 | <tag>refresh_pattern</tag> |
1377f2b1 AJ |
307 | <p>Removed option <em>ignore-auth</em>. Its commonly desired behaviour |
308 | is performed by default with correct HTTP/1.1 revalidation. | |
064679ea | 309 | <p>Removed <em>ignore-must-revalidate</em>. Other more HTTP compliant |
1377f2b1 AJ |
310 | directives (cache, store_miss) can be used to prevent objects from |
311 | caching. | |
064679ea | 312 | |
9a258777 AJ |
313 | <tag>sslcrtd_children</tag> |
314 | <p>New parameter <em>queue-size=</em> to set the maximum number | |
315 | of queued requests. | |
316 | ||
317 | <tag>sslcrtvalidator_children</tag> | |
318 | <p>New parameter <em>queue-size=</em> to set the maximum number | |
319 | of queued requests. | |
6825b101 | 320 | |
183b876f | 321 | <tag>url_rewrite_children</tag> |
9a258777 AJ |
322 | <p>New parameter <em>queue-size=</em> to set the maximum number |
323 | of queued requests. | |
4d0832d7 AJ |
324 | |
325 | </descrip> | |
326 | ||
327 | <sect1>Removed tags<label id="removedtags"> | |
328 | <p> | |
329 | <descrip> | |
f1a5d071 AJ |
330 | <tag>cache_peer_domain</tag> |
331 | <p>Superceded by <em>cache_peer_access</em>. Use dstdomain ACL | |
332 | in the access control list to restrict domains requested. | |
333 | ||
7e62a74f AJ |
334 | <tag>sslproxy_cafile</tag> |
335 | <p>Replaced by <em>tls_outgoing_options cafile=</em>. | |
b0769ee3 | 336 | Which now takes multiple entries. |
7e62a74f AJ |
337 | |
338 | <tag>sslproxy_capath</tag> | |
339 | <p>Replaced by <em>tls_outgoing_options capath=</em>. | |
340 | ||
341 | <tag>sslproxy_cipher</tag> | |
342 | <p>Replaced by <em>tls_outgoing_options cipher=</em>. | |
343 | ||
344 | <tag>sslproxy_client_certificate</tag> | |
345 | <p>Replaced by <em>tls_outgoing_options cert=</em>. | |
346 | ||
347 | <tag>sslproxy_client_key</tag> | |
348 | <p>Replaced by <em>tls_outgoing_options key=</em>. | |
349 | ||
350 | <tag>sslproxy_flags</tag> | |
351 | <p>Replaced by <em>tls_outgoing_options flags=</em>. | |
352 | ||
353 | <tag>sslproxy_options</tag> | |
354 | <p>Replaced by <em>tls_outgoing_options options=</em>. | |
1cc44095 AJ |
355 | <p>All values for SSLv2 configuration or disabling have been removed. |
356 | <p>Manual squid.conf update may be required on upgrade. | |
7e62a74f AJ |
357 | |
358 | <tag>sslproxy_version</tag> | |
1cc44095 AJ |
359 | <p>Replaced by <em>tls_outgoing_options options=</em>. |
360 | <p>All values for SSLv2 configuration or disabling have been removed. | |
361 | <p>Manual squid.conf update may be required on upgrade. | |
4d0832d7 AJ |
362 | |
363 | </descrip> | |
364 | ||
365 | ||
366 | <sect>Changes to ./configure options since Squid-3.5 | |
367 | <p> | |
368 | There have been some changes to Squid's build configuration since Squid-3.5. | |
369 | ||
370 | This section gives an account of those changes in three categories: | |
371 | ||
372 | <itemize> | |
373 | <item><ref id="newoptions" name="New options"> | |
374 | <item><ref id="modifiedoptions" name="Changes to existing options"> | |
375 | <item><ref id="removedoptions" name="Removed options"> | |
376 | </itemize> | |
377 | ||
378 | ||
379 | <sect1>New options<label id="newoptions"> | |
380 | <p> | |
381 | <descrip> | |
cb0b3d63 AJ |
382 | <tag>--enable-security-cert-generators</tag> |
383 | <p>New option to control which TLS/SSL dynamic certificate generator | |
384 | helpers are built and installed. | |
385 | <p>Helper <em>ssl_crtd<em> has been renamed to <em>security_file_certgen</em> | |
386 | and built with module name <em>file</em>. Requires <em>--with-openssl</em>. | |
387 | ||
8732ea9d | 388 | <tag>--enable-security-cert-validators</tag> |
cb0b3d63 | 389 | <p>New option to control which TLS/SSL certificate validation |
40063c71 AJ |
390 | helpers are built and installed. |
391 | <p>One <em>fake</em> helper that does not actually perform any | |
392 | certificate checks is provided for testing and as an example | |
393 | for writing custom helpers. | |
4d0832d7 AJ |
394 | |
395 | </descrip> | |
396 | ||
397 | <sect1>Changes to existing options<label id="modifiedoptions"> | |
398 | <p> | |
399 | <descrip> | |
700e2961 AJ |
400 | <tag>--enable-auth-basic</tag> |
401 | <p>The <em>MSNT-multi-domain</em> helper has been removed. | |
4d0832d7 | 402 | |
b817c20f AJ |
403 | <tag>--enable-auth-ntlm</tag> |
404 | <p>The SMB LanMan helper is now built using <em>SMB_LM</em> | |
405 | (was lower case <em>smb_lm</em>). | |
406 | ||
4dd2c9d6 AJ |
407 | <tag>--enable-diskio</tag> |
408 | <p>Auto-detection of SMP related modules has been fixed to | |
409 | actually auto-detect them without configuring the module | |
410 | list manually. | |
411 | ||
4d0832d7 AJ |
412 | </descrip> |
413 | </p> | |
414 | ||
415 | <sect1>Removed options<label id="removedoptions"> | |
416 | <p> | |
417 | <descrip> | |
418 | ||
419 | </descrip> | |
420 | ||
421 | ||
422 | <sect>Regressions since Squid-2.7 | |
423 | ||
183b876f | 424 | <p>Some squid.conf options which were available in Squid-2.7 are not yet available in Squid-4 |
4d0832d7 AJ |
425 | |
426 | <p>If you need something to do then porting one of these from Squid-2 to Squid-3 is most welcome. | |
427 | ||
428 | <sect1>Missing squid.conf options available in Squid-2.7 | |
429 | <p> | |
430 | <descrip> | |
431 | <tag>broken_vary_encoding</tag> | |
432 | <p>Not yet ported from 2.6 | |
433 | ||
434 | <tag>cache_peer</tag> | |
435 | <p><em>monitorinterval=</em> not yet ported from 2.6 | |
436 | <p><em>monitorsize=</em> not yet ported from 2.6 | |
437 | <p><em>monitortimeout=</em> not yet ported from 2.6 | |
438 | <p><em>monitorurl=</em> not yet ported from 2.6 | |
439 | ||
440 | <tag>cache_vary</tag> | |
441 | <p>Not yet ported from 2.6 | |
442 | ||
443 | <tag>error_map</tag> | |
444 | <p>Not yet ported from 2.6 | |
445 | ||
446 | <tag>external_refresh_check</tag> | |
447 | <p>Not yet ported from 2.7 | |
448 | ||
449 | <tag>location_rewrite_access</tag> | |
450 | <p>Not yet ported from 2.6 | |
451 | ||
452 | <tag>location_rewrite_children</tag> | |
453 | <p>Not yet ported from 2.6 | |
454 | ||
455 | <tag>location_rewrite_concurrency</tag> | |
456 | <p>Not yet ported from 2.6 | |
457 | ||
458 | <tag>location_rewrite_program</tag> | |
459 | <p>Not yet ported from 2.6 | |
460 | ||
461 | <tag>refresh_pattern</tag> | |
462 | <p><em>stale-while-revalidate=</em> not yet ported from 2.7 | |
463 | <p><em>ignore-stale-while-revalidate=</em> not yet ported from 2.7 | |
464 | <p><em>negative-ttl=</em> not yet ported from 2.7 | |
465 | ||
466 | <tag>refresh_stale_hit</tag> | |
467 | <p>Not yet ported from 2.7 | |
468 | ||
469 | <tag>update_headers</tag> | |
470 | <p>Not yet ported from 2.7 | |
471 | ||
472 | </descrip> | |
473 | ||
6a9396a7 AJ |
474 | <sect>Copyright |
475 | <p> | |
ef57eb7b | 476 | Copyright (C) 1996-2016 The Squid Software Foundation and contributors |
6a9396a7 AJ |
477 | <p> |
478 | Squid software is distributed under GPLv2+ license and includes | |
479 | contributions from numerous individuals and organizations. | |
480 | Please see the COPYING and CONTRIBUTORS files for details. | |
481 | ||
4d0832d7 | 482 | </article> |