#
-# $Id: cf.data.pre,v 1.315 2003/05/20 12:17:38 robertc Exp $
+# $Id: cf.data.pre,v 1.316 2003/05/21 00:50:09 hno Exp $
#
#
# SQUID Web Proxy Cache http://www.squid-cache.org/
#
COMMENT_START
-WELCOME TO SQUID @VERSION@
-----------------------------
+ WELCOME TO SQUID @VERSION@
+ ----------------------------
-This is the default Squid configuration file. You may wish
+ This is the default Squid configuration file. You may wish
+ to look at the Squid home page (http://www.squid-cache.org/)
+ for the FAQ and other documentation.
- to look at the Squid home page (http://www.squid-cache.org/)
+ The default Squid config file shows what the defaults for
+ various options happen to be. If you don't need to change the
+ default, you shouldn't uncomment the line. Doing so may cause
+ run-time problems. In some cases "none" refers to no default
+ setting at all, while in other cases it refers to a valid
+ option - the comments for that keyword indicate if this is the
+ case.
- for the FAQ and other documentation.
+COMMENT_END
- The default Squid config file shows what the defaults for
- various options happen to be. If you don't need to change the
- default, you shouldn't uncomment the line. Doing so may cause
- run-time problems. In some cases "none" refers to no default
- setting at all, while in other cases it refers to a valid
- option - the comments for that keyword indicate if this is the
- case.
-
- COMMENT_END
-
- COMMENT_START
- NETWORK OPTIONS
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: http_port ascii_port
+COMMENT_START
+ NETWORK OPTIONS
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: http_port ascii_port
+TYPE: http_port_list
+DEFAULT: none
+LOC: Config.Sockaddr.http
+DOC_START
+ Usage: port [options]
+ hostname:port [options]
+ 1.2.3.4:port [options]
+
+ The socket addresses where Squid will listen for HTTP client
+ requests. You may specify multiple socket addresses.
+ There are three forms: port alone, hostname with port, and
+ IP address with port. If you specify a hostname or IP
+ address, then Squid binds the socket to that specific
+ address. This replaces the old 'tcp_incoming_address'
+ option. Most likely, you do not need to bind to a specific
+ address, so you can use the port number alone.
+
+ If you are running Squid in accelerator mode, then you
+ probably want to listen on port 80 also, or instead.
+
+ The -a command line option will override the *first* port
+ number listed here. That option will NOT override an IP
+ address, however.
+
+ You may specify multiple socket addresses on multiple lines.
+
+ options are:
+ accel Accelerator mode
+ transparent Support for transparent proxies
+ vhost Accelerator using Host directive
+ vport Accelerator with IP virtual host support
+ vport=NN As above, but uses specified port number
+ rather than the http_port number.
+ defaultsite=xx Main web site name for accelerators.
+ also implies accel
+ protocol= Protocol to reconstruct accelerated
+ requests with. Defaults to http.
+
+ If you run Squid on a dual-homed machine with an internal
+ and an external interface then we recommend you to specify the
+ internal address:port in http_port. This way Squid will only be
+ visible on the internal address.
+NOCOMMENT_START
+# Squid normally listens to port 3128
+http_port 3128
+NOCOMMENT_END
+DOC_END
+
+NAME: https_port
+IFDEF: USE_SSL
+TYPE: https_port_list
+DEFAULT: none
+LOC: Config.Sockaddr.https
+DOC_START
+ Usage: [ip:]port cert=certificate.pem [key=key.pem] [options...]
+
+ The socket address where Squid will listen for HTTPS client
+ requests.
+
+ This is really only useful for situations where you are running
+ squid in accelerator mode and you want to do the SSL work at the
+ accelerator level.
+
+ You may specify multiple socket addresses on multiple lines,
+ each with their own SSL certificate and/or options.
+
+ Options:
+
+ defaultsite= The name of the https site presented on
+ this port.
+
+ protocol= Protocol to reconstruct accelerated requests
+ with. Defaults to https.
+
+ cert= Path to SSL certificate (PEM format)
+
+ key= Path to SSL private key file (PEM format)
+ if not specified, the certificate file is
+ assumed to be a combined certificate and
+ key file
+
+ version= The version of SSL/TLS supported
+ 1 automatic (default)
+ 2 SSLv2 only
+ 3 SSLv3 only
+ 4 TLSv1 only
+
+ cipher= Colon separated list of supported ciphers
+
+ options= Varions SSL engine options. The most important
+ being:
+ NO_SSLv2 Disallow the use of SSLv2
+ NO_SSLv3 Disallow the use of SSLv3
+ NO_TLSv1 Disallow the use of TLSv1
+ SINGLE_DH_USE Always create a new key when using
+ temporary/ephemeral DH key exchanges
+ See src/ssl_support.c or OpenSSL SSL_CTX_set_options
+ documentation for a complete list of options.
+
+ clientca= File containing the list of CAs to use when
+ requesting a client certificate
+
+ cafile= File containing additional CA certificates to
+ use when verifying client certificates. If unset
+ clientca will be used.
+
+ capath= Directory containing additional CA certificates
+ to use when verifying client certificates
+
+ dhparams= File containing DH parameters for temporary/ephemeral
+ DH key exchanges
+
+ sslflags= Various flags modifying the use of SSL:
+ DELAYED_AUTH
+ Don't request client certificates
+ immediately, but wait until acl processing
+ requires a certificate
+ NO_DEFAULT_CA
+ Don't use the default CA list built in
+ to OpenSSL.
+
+DOC_END
+
+NAME: ssl_unclean_shutdown
+IFDEF: USE_SSL
+TYPE: onoff
+DEFAULT: off
+LOC: Config.SSL.unclean_shutdown
+DOC_START
+ Some browsers (especially MSIE) bugs out on SSL shutdown
+ messages.
+DOC_END
+
+NAME: ssl_engine
+IFDEF: USE_SSL
+TYPE: string
+LOC: Config.SSL.ssl_engine
+DEFAULT: none
+DOC_START
+ The openssl engine to use. You will need to set this if you
+ would like to use hardware SSL acceleration for example.
+DOC_END
+
+NAME: sslproxy_client_certificate
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.cert
+TYPE: string
+DOC_START
+ Client SSL Certificate to use when proxying https:// URLs
+DOC_END
+
+NAME: sslproxy_client_key
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.key
+TYPE: string
+DOC_START
+ Client SSL Key to use when proxying https:// URLs
+DOC_END
+
+NAME: sslproxy_version
+IFDEF: USE_SSL
+DEFAULT: 1
+LOC: Config.ssl_client.version
+TYPE: int
+DOC_START
+ SSL version level to use when proxying https:// URLs
+DOC_END
+
+NAME: sslproxy_options
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.options
+TYPE: string
+DOC_START
+ SSL engine options to use when proxying https:// URLs
+DOC_END
+
+NAME: sslproxy_cipher
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.cipher
+TYPE: string
+DOC_START
+ SSL cipher list to use when proxying https:// URLs
+DOC_END
+
+NAME: sslproxy_cafile
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.cafile
+TYPE: string
+DOC_START
+DOC_END
+
+NAME: sslproxy_capath
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.capath
+TYPE: string
+DOC_START
+DOC_END
+
+NAME: sslproxy_flags
+IFDEF: USE_SSL
+DEFAULT: none
+LOC: Config.ssl_client.flags
+TYPE: string
+DOC_START
+DOC_END
+
+NAME: icp_port udp_port
+TYPE: ushort
+DEFAULT: 0
+LOC: Config.Port.icp
+DOC_START
+ The port number where Squid sends and receives ICP queries to
+ and from neighbor caches. The standard UDP port for ICP is 3130.
+ Default is disabled (0).
+NOCOMMENT_START
+icp_port 3130
+NOCOMMENT_END
+DOC_END
+
+NAME: htcp_port
+IFDEF: USE_HTCP
+TYPE: ushort
+DEFAULT: 4827
+LOC: Config.Port.htcp
+DOC_START
+ The port number where Squid sends and receives HTCP queries to
+ and from neighbor caches. Default is 4827. To disable use
+ "0".
+DOC_END
+
+
+NAME: mcast_groups
+TYPE: wordlist
+LOC: Config.mcast_group_list
+DEFAULT: none
+DOC_START
+ This tag specifies a list of multicast groups which your server
+ should join to receive multicasted ICP queries.
+
+ NOTE! Be very careful what you put here! Be sure you
+ understand the difference between an ICP _query_ and an ICP
+ _reply_. This option is to be set only if you want to RECEIVE
+ multicast queries. Do NOT set this option to SEND multicast
+ ICP (use cache_peer for that). ICP replies are always sent via
+ unicast, so this option does not affect whether or not you will
+ receive replies from multicast group members.
+
+ You must be very careful to NOT use a multicast address which
+ is already in use by another group of caches.
+
+ If you are unsure about multicast, please read the Multicast
+ chapter in the Squid FAQ (http://www.squid-cache.org/FAQ/).
+
+ Usage: mcast_groups 239.128.16.128 224.0.1.20
+
+ By default, Squid doesn't listen on any multicast groups.
+DOC_END
+
+
+NAME: udp_incoming_address
+TYPE: address
+LOC:Config.Addrs.udp_incoming
+DEFAULT: 0.0.0.0
+DOC_NONE
+
+NAME: udp_outgoing_address
+TYPE: address
+LOC: Config.Addrs.udp_outgoing
+DEFAULT: 255.255.255.255
+DOC_START
+ udp_incoming_address is used for the ICP socket receiving packets
+ from other caches.
+ udp_outgoing_address is used for ICP packets sent out to other
+ caches.
+
+ The default behavior is to not bind to any specific address.
+
+ A udp_incoming_address value of 0.0.0.0 indicates that Squid should
+ listen for UDP messages on all available interfaces.
+
+ If udp_outgoing_address is set to 255.255.255.255 (the default)
+ then it will use the same socket as udp_incoming_address. Only
+ change this if you want to have ICP queries sent using another
+ address than where this Squid listens for ICP queries from other
+ caches.
+
+ NOTE, udp_incoming_address and udp_outgoing_address can not
+ have the same value since they both use port 3130.
+DOC_END
- TYPE: http_port_list
+COMMENT_START
+ OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: cache_peer
+TYPE: peer
+DEFAULT: none
+LOC: Config.peers
+DOC_START
+ To specify other caches in a hierarchy, use the format:
+
+ cache_peer hostname type http_port icp_port [options]
+
+ For example,
+
+ # proxy icp
+ # hostname type port port options
+ # -------------------- -------- ----- ----- -----------
+ cache_peer parent.foo.net parent 3128 3130 [proxy-only]
+ cache_peer sib1.foo.net sibling 3128 3130 [proxy-only]
+ cache_peer sib2.foo.net sibling 3128 3130 [proxy-only]
+
+ type: either 'parent', 'sibling', or 'multicast'.
+
+ proxy_port: The port number where the cache listens for proxy
+ requests.
+
+ icp_port: Used for querying neighbor caches about
+ objects. To have a non-ICP neighbor
+ specify '7' for the ICP port and make sure the
+ neighbor machine has the UDP echo port
+ enabled in its /etc/inetd.conf file.
+
+ options: proxy-only
+ weight=n
+ basetime=n
+ ttl=n
+ no-query
+ background-ping
+ default
+ round-robin
+ weighted-round-robin
+ carp
+ multicast-responder
+ closest-only
+ no-digest
+ no-netdb-exchange
+ no-delay
+ login=user:password | PASS | *:password
+ connect-timeout=nn
+ digest-url=url
+ allow-miss
+ max-conn
+ originserver
+ name=xxx
+ forceddomain=name
+ ssl
+ sslcert=/path/to/ssl/certificate
+ sslkey=/path/to/ssl/key
+ sslversion=1|2|3|4
+ sslcipher=...
+ ssloptions=...
+ front-end-https[=on|auto]
+
+ use 'proxy-only' to specify that objects fetched
+ from this cache should not be saved locally.
+
+ use 'weight=n' to specify a weighted parent.
+ The weight must be an integer. The default weight
+ is 1, larger weights are favored more.
+
+ use 'basetime=n' to specify a base amount to
+ be subtracted from round trip times of parents.
+ It is subtracted before division by weight in calculating
+ which parent to fectch from. If the rtt is less than the
+ base time then the rtt is set to a minimal value.
+
+ use 'ttl=n' to specify a IP multicast TTL to use
+ when sending an ICP queries to this address.
+ Only useful when sending to a multicast group.
+ Because we don't accept ICP replies from random
+ hosts, you must configure other group members as
+ peers with the 'multicast-responder' option below.
+
+ use 'no-query' to NOT send ICP queries to this
+ neighbor.
+
+ use 'background-ping' to only send ICP queries to this
+ neighbor infrequently. This is used to keep the neighbor
+ round trip time updated and is usually used in
+ conjunction with weighted-round-robin.
+
+ use 'default' if this is a parent cache which can
+ be used as a "last-resort." You should probably
+ only use 'default' in situations where you cannot
+ use ICP with your parent cache(s).
+
+ use 'round-robin' to define a set of parents which
+ should be used in a round-robin fashion in the
+ absence of any ICP queries.
+
+ use 'weighted-round-robin' to define a set of parents
+ which should be used in a round-robin fashion with the
+ frequency of each parent being based on the round trip
+ time. Closer parents are used more often.
+ Usually used for background-ping parents.
+
+ use 'carp' to define a set of parents which should
+ be used as a CARP array. The requests will then be
+ distributed among the parents based on the CARP load
+ balancing hash function based on their weigth.
+
+ 'multicast-responder' indicates that the named peer
+ is a member of a multicast group. ICP queries will
+ not be sent directly to the peer, but ICP replies
+ will be accepted from it.
+
+ 'closest-only' indicates that, for ICP_OP_MISS
+ replies, we'll only forward CLOSEST_PARENT_MISSes
+ and never FIRST_PARENT_MISSes.
+
+ use 'no-digest' to NOT request cache digests from
+ this neighbor.
+
+ 'no-netdb-exchange' disables requesting ICMP
+ RTT database (NetDB) from the neighbor.
+
+ use 'no-delay' to prevent access to this neighbor
+ from influencing the delay pools.
+
+ use 'login=user:password' if this is a personal/workgroup
+ proxy and your parent requires proxy authentication.
+ Note: The string can include URL escapes (i.e. %20 for
+ spaces). This also means that % must be written as %%.
+
+ use 'login=PASS' if users must authenticate against
+ the upstream proxy. This will pass the users credentials
+ as they are to the peer proxy. This only works for the
+ Basic HTTP authentication sheme. Note: To combine this
+ with proxy_auth both proxies must share the same user
+ database as HTTP only allows for one proxy login.
+ Also be warned that this will expose your users proxy
+ password to the peer. USE WITH CAUTION
+
+ use 'login=*:password' to pass the username to the
+ upstream cache, but with a fixed password. This is meant
+ to be used when the peer is in another administrative
+ domain, but it is still needed to identify each user.
+ The star can optionally be followed by some extra
+ information which is added to the username. This can
+ be used to identify this proxy to the peer, similar to
+ the login=username:password option above.
+
+ use 'connect-timeout=nn' to specify a peer
+ specific connect timeout (also see the
+ peer_connect_timeout directive)
+
+ use 'digest-url=url' to tell Squid to fetch the cache
+ digest (if digests are enabled) for this host from
+ the specified URL rather than the Squid default
+ location.
+
+ use 'allow-miss' to disable Squid's use of only-if-cached
+ when forwarding requests to siblings. This is primarily
+ useful when icp_hit_stale is used by the sibling. To
+ extensive use of this option may result in forwarding
+ loops, and you should avoid having two-way peerings
+ with this option. (for example to deny peer usage on
+ requests from peer by denying cache_peer_access if the
+ source is a peer)
+
+ use 'max-conn' to limit the amount of connections Squid
+ may open to this peer.
+
+ 'originserver' causes this parent peer to be contacted as
+ a origin server. Meant to be used in accelerator setups.
+
+ use 'name=xxx' if you have multiple peers on the same
+ host but different ports. This name can then be used to
+ differentiate the peers in cache_peer_access and similar
+ directives.
+
+ use 'forceddomain=name' to forcibly set the Host header
+ of requests forwarded to this peer. Useful in accelerator
+ setups where the server (peer) expects a certain domain
+ name and using redirectors to feed this domainname
+ is not feasible.
+
+ use 'ssl' to indicate that connections to this peer should
+ bs SSL/TLS encrypted.
+
+ use 'sslcert=/path/to/ssl/certificate' to specify a client
+ SSL certificate to use when connecting to this peer.
+
+ use 'sslkey=/path/to/ssl/key' to specify the private SSL
+ key corresponding to sslcert above. If 'sslkey' is not
+ specified then 'sslcert' is assumed to reference a
+ combined file containing both the certificate and the key.
+
+ use sslversion=1|2|3|4 to specify the SSL version to use
+ when connecting to this peer
+ 1 = automatic (default)
+ 2 = SSL v2 only
+ 3 = SSL v3 only
+ 4 = TLS v1 only
+
+ use sslcipher=... to specify the list of valid SSL chipers
+ to use when connecting to this peer
+
+ use ssloptions=... to specify various SSL engine options:
+ NO_SSLv2 Disallow the use of SSLv2
+ NO_SSLv3 Disallow the use of SSLv3
+ NO_TLSv1 Disallow the use of TLSv1
+ See src/ssl_support.c or the OpenSSL documentation for
+ a more complete list.
+
+ use cafile=... to specify a file containing additional
+ CA certificates to use when verifying the peer certificate
+
+ use capath=... to specify a directory containing additional
+ CA certificates to use when verifying the peer certificate
+
+ use sslflags=... to specify various flags modifying the
+ SSL implementation:
+ DONT_VERIFY_PEER
+ Accept certificates even if they fail to
+ verify.
+ NO_DEFAULT_CA
+ Don't use the default CA list built in
+ to OpenSSL.
+ DONT_VERIFY_DOMAIN
+ Don't verify that the peer certificate
+ matches the server name
+
+ use sslname= to specify the peer name as advertised
+ in it's certificate. Used for verifying the correctness
+ of the received peer certificate. If not specified the
+ peer hostname will be used.
+
+ use front-end-https to enable the "Front-End-Https: On"
+ header needed when using Squid as a SSL frontend infront
+ of Microsoft OWA. See MS KB document Q307347 for details
+ on this header. If set to auto then the header will
+ only be added if the request is forwarded as a https://
+ URL.
+
+ NOTE: non-ICP neighbors must be specified as 'parent'.
+DOC_END
+
+NAME: cache_peer_domain cache_host_domain
+TYPE: hostdomain
+DEFAULT: none
+LOC: none
+DOC_START
+ Use to limit the domains for which a neighbor cache will be
+ queried. Usage:
+
+ cache_peer_domain cache-host domain [domain ...]
+ cache_peer_domain cache-host !domain
+
+ For example, specifying
+
+ cache_peer_domain parent.foo.net .edu
+
+ has the effect such that UDP query packets are sent to
+ 'bigserver' only when the requested object exists on a
+ server in the .edu domain. Prefixing the domainname
+ with '!' means that the cache will be queried for objects
+ NOT in that domain.
+
+ NOTE: * Any number of domains may be given for a cache-host,
+ either on the same or separate lines.
+ * When multiple domains are given for a particular
+ cache-host, the first matched domain is applied.
+ * Cache hosts with no domain restrictions are queried
+ for all requests.
+ * There are no defaults.
+ * There is also a 'cache_peer_access' tag in the ACL
+ section.
+DOC_END
+
+
+NAME: neighbor_type_domain
+TYPE: hostdomaintype
+DEFAULT: none
+LOC: none
+DOC_START
+ usage: neighbor_type_domain parent|sibling domain domain ...
+
+ Modifying the neighbor type for specific domains is now
+ possible. You can treat some domains differently than the the
+ default neighbor type specified on the 'cache_peer' line.
+ Normally it should only be necessary to list domains which
+ should be treated differently because the default neighbor type
+ applies for hostnames which do not match domains listed here.
+
+EXAMPLE:
+ cache_peer parent cache.foo.org 3128 3130
+ neighbor_type_domain cache.foo.org sibling .com .net
+ neighbor_type_domain cache.foo.org sibling .au .de
+DOC_END
+
+NAME: icp_query_timeout
+COMMENT: (msec)
+DEFAULT: 0
+TYPE: int
+LOC: Config.Timeout.icp_query
+DOC_START
+ Normally Squid will automatically determine an optimal ICP
+ query timeout value based on the round-trip-time of recent ICP
+ queries. If you want to override the value determined by
+ Squid, set this 'icp_query_timeout' to a non-zero value. This
+ value is specified in MILLISECONDS, so, to use a 2-second
+ timeout (the old default), you would write:
+
+ icp_query_timeout 2000
+DOC_END
+
+NAME: maximum_icp_query_timeout
+COMMENT: (msec)
+DEFAULT: 2000
+TYPE: int
+LOC: Config.Timeout.icp_query_max
+DOC_START
+ Normally the ICP query timeout is determined dynamically. But
+ sometimes it can lead to very large values (say 5 seconds).
+ Use this option to put an upper limit on the dynamic timeout
+ value. Do NOT use this option to always use a fixed (instead
+ of a dynamic) timeout value. To set a fixed timeout see the
+ 'icp_query_timeout' directive.
+DOC_END
+
+NAME: minimum_icp_query_timeout
+COMMENT: (msec)
+DEFAULT: 5
+TYPE: int
+LOC: Config.Timeout.icp_query_min
+DOC_START
+ Normally the ICP query timeout is determined dynamically. But
+ sometimes it can lead to very small timeouts, even lower than
+ the normal latency variance on your link due to traffic.
+ Use this option to put an lower limit on the dynamic timeout
+ value. Do NOT use this option to always use a fixed (instead
+ of a dynamic) timeout value. To set a fixed timeout see the
+ 'icp_query_timeout' directive.
+DOC_END
+
+NAME: mcast_icp_query_timeout
+COMMENT: (msec)
+DEFAULT: 2000
+TYPE: int
+LOC: Config.Timeout.mcast_icp_query
+DOC_START
+ For Multicast peers, Squid regularly sends out ICP "probes" to
+ count how many other peers are listening on the given multicast
+ address. This value specifies how long Squid should wait to
+ count all the replies. The default is 2000 msec, or 2
+ seconds.
+DOC_END
+
+NAME: dead_peer_timeout
+COMMENT: (seconds)
+DEFAULT: 10 seconds
+TYPE: time_t
+LOC: Config.Timeout.deadPeer
+DOC_START
+ This controls how long Squid waits to declare a peer cache
+ as "dead." If there are no ICP replies received in this
+ amount of time, Squid will declare the peer dead and not
+ expect to receive any further ICP replies. However, it
+ continues to send ICP queries, and will mark the peer as
+ alive upon receipt of the first subsequent ICP reply.
+
+ This timeout also affects when Squid expects to receive ICP
+ replies from peers. If more than 'dead_peer' seconds have
+ passed since the last ICP reply was received, Squid will not
+ expect to receive an ICP reply on the next query. Thus, if
+ your time between requests is greater than this timeout, you
+ will see a lot of requests sent DIRECT to origin servers
+ instead of to your parents.
+DOC_END
+
+
+NAME: hierarchy_stoplist
+TYPE: wordlist
+DEFAULT: none
+LOC: Config.hierarchy_stoplist
+DOC_START
+ A list of words which, if found in a URL, cause the object to
+ be handled directly by this cache. In other words, use this
+ to not query neighbor caches for certain objects. You may
+ list this option multiple times.
+NOCOMMENT_START
+#We recommend you to use at least the following line.
+hierarchy_stoplist cgi-bin ?
+NOCOMMENT_END
+DOC_END
- DEFAULT: none
- LOC: Config.Sockaddr.http
- DOC_START
+NAME: no_cache
+TYPE: acl_access
+DEFAULT: none
+LOC: Config.accessList.noCache
+DOC_START
+ A list of ACL elements which, if matched, cause the request to
+ not be satisfied from the cache and the reply to not be cached.
+ In other words, use this to force certain objects to never be cached.
- Usage: port [options]
+ You must use the word 'DENY' to indicate the ACL names which should
+ NOT be cached.
- hostname:port [options]
+NOCOMMENT_START
+#We recommend you to use the following two lines.
+acl QUERY urlpath_regex cgi-bin \?
+no_cache deny QUERY
+NOCOMMENT_END
+DOC_END
+
+NAME: background_ping_rate
+COMMENT: time-units
+TYPE: time_t
+DEFAULT: 10 seconds
+LOC: Config.backgroundPingRate
+DOC_START
+ Controls how often the ICP pings are sent to siblings that
+ have background-ping set.
+DOC_END
- 1.2.3.4:port [options]
- The socket addresses where Squid will listen for HTTP client
- requests. You may specify multiple socket addresses.
+COMMENT_START
+ OPTIONS WHICH AFFECT THE CACHE SIZE
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: cache_mem
+COMMENT: (bytes)
+TYPE: b_size_t
+DEFAULT: 8 MB
+LOC: Config.memMaxSize
+DOC_START
+ NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS SIZE.
+ IT ONLY PLACES A LIMIT ON HOW MUCH ADDITIONAL MEMORY SQUID WILL
+ USE AS A MEMORY CACHE OF OBJECTS. SQUID USES MEMORY FOR OTHER
+ THINGS AS WELL. SEE THE SQUID FAQ SECTION 8 FOR DETAILS.
+
+ 'cache_mem' specifies the ideal amount of memory to be used
+ for:
+ * In-Transit objects
+ * Hot Objects
+ * Negative-Cached objects
+
+ Data for these objects are stored in 4 KB blocks. This
+ parameter specifies the ideal upper limit on the total size of
+ 4 KB blocks allocated. In-Transit objects take the highest
+ priority.
+
+ In-transit objects have priority over the others. When
+ additional space is needed for incoming data, negative-cached
+ and hot objects will be released. In other words, the
+ negative-cached and hot objects will fill up any unused space
+ not needed for in-transit objects.
+
+ If circumstances require, this limit will be exceeded.
+ Specifically, if your incoming request rate requires more than
+ 'cache_mem' of memory to hold in-transit objects, Squid will
+ exceed this limit to satisfy the new requests. When the load
+ decreases, blocks will be freed until the high-water mark is
+ reached. Thereafter, blocks will be used to store hot
+ objects.
+DOC_END
+
+
+NAME: cache_swap_low
+COMMENT: (percent, 0-100)
+TYPE: int
+DEFAULT: 90
+LOC: Config.Swap.lowWaterMark
+DOC_NONE
+
+NAME: cache_swap_high
+COMMENT: (percent, 0-100)
+TYPE: int
+DEFAULT: 95
+LOC: Config.Swap.highWaterMark
+DOC_START
+
+ The low- and high-water marks for cache object replacement.
+ Replacement begins when the swap (disk) usage is above the
+ low-water mark and attempts to maintain utilization near the
+ low-water mark. As swap utilization gets close to high-water
+ mark object eviction becomes more aggressive. If utilization is
+ close to the low-water mark less replacement is done each time.
+
+ Defaults are 90% and 95%. If you have a large cache, 5% could be
+ hundreds of MB. If this is the case you may wish to set these
+ numbers closer together.
+DOC_END
+
+NAME: maximum_object_size
+COMMENT: (bytes)
+TYPE: b_size_t
+DEFAULT: 4096 KB
+LOC: Config.Store.maxObjectSize
+DOC_START
+ Objects larger than this size will NOT be saved on disk. The
+ value is specified in kilobytes, and the default is 4MB. If
+ you wish to get a high BYTES hit ratio, you should probably
+ increase this (one 32 MB object hit counts for 3200 10KB
+ hits). If you wish to increase speed more than your want to
+ save bandwidth you should leave this low.
+
+ NOTE: if using the LFUDA replacement policy you should increase
+ this value to maximize the byte hit rate improvement of LFUDA!
+ See replacement_policy below for a discussion of this policy.
+DOC_END
+
+NAME: minimum_object_size
+COMMENT: (bytes)
+TYPE: b_size_t
+DEFAULT: 0 KB
+LOC: Config.Store.minObjectSize
+DOC_START
+ Objects smaller than this size will NOT be saved on disk. The
+ value is specified in kilobytes, and the default is 0 KB, which
+ means there is no minimum.
+DOC_END
+
+NAME: maximum_object_size_in_memory
+COMMENT: (bytes)
+TYPE: b_size_t
+DEFAULT: 8 KB
+LOC: Config.Store.maxInMemObjSize
+DOC_START
+ Objects greater than this size will not be attempted to kept in
+ the memory cache. This should be set high enough to keep objects
+ accessed frequently in memory to improve performance whilst low
+ enough to keep larger objects from hoarding cache_mem .
+DOC_END
+
+NAME: ipcache_size
+COMMENT: (number of entries)
+TYPE: int
+DEFAULT: 1024
+LOC: Config.ipcache.size
+DOC_NONE
+
+NAME: ipcache_low
+COMMENT: (percent)
+TYPE: int
+DEFAULT: 90
+LOC: Config.ipcache.low
+DOC_NONE
+
+NAME: ipcache_high
+COMMENT: (percent)
+TYPE: int
+DEFAULT: 95
+LOC: Config.ipcache.high
+DOC_START
+ The size, low-, and high-water marks for the IP cache.
+DOC_END
+
+NAME: fqdncache_size
+COMMENT: (number of entries)
+TYPE: int
+DEFAULT: 1024
+LOC: Config.fqdncache.size
+DOC_START
+ Maximum number of FQDN cache entries.
+DOC_END
+
+NAME: cache_replacement_policy
+TYPE: removalpolicy
+LOC: Config.replPolicy
+DEFAULT: lru
+DOC_START
+ The cache replacement policy parameter determines which
+ objects are evicted (replaced) when disk space is needed.
+
+ lru : Squid's original list based LRU policy
+ heap GDSF : Greedy-Dual Size Frequency
+ heap LFUDA: Least Frequently Used with Dynamic Aging
+ heap LRU : LRU policy implemented using a heap
+
+ Applies to any cache_dir lines listed below this.
+
+ The LRU policies keeps recently referenced objects.
+
+ The heap GDSF policy optimizes object hit rate by keeping smaller
+ popular objects in cache so it has a better chance of getting a
+ hit. It achieves a lower byte hit rate than LFUDA though since
+ it evicts larger (possibly popular) objects.
+
+ The heap LFUDA policy keeps popular objects in cache regardless of
+ their size and thus optimizes byte hit rate at the expense of
+ hit rate since one large, popular object will prevent many
+ smaller, slightly less popular objects from being cached.
+
+ Both policies utilize a dynamic aging mechanism that prevents
+ cache pollution that can otherwise occur with frequency-based
+ replacement policies.
+
+ NOTE: if using the LFUDA replacement policy you should increase
+ the value of maximum_object_size above its default of 4096 KB to
+ to maximize the potential byte hit rate improvement of LFUDA.
+
+ For more information about the GDSF and LFUDA cache replacement
+ policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html
+ and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html.
+DOC_END
+
+NAME: memory_replacement_policy
+TYPE: removalpolicy
+LOC: Config.memPolicy
+DEFAULT: lru
+DOC_START
+ The memory replacement policy parameter determines which
+ objects are purged from memory when memory space is needed.
+
+ See cache_replacement_policy for details.
+DOC_END
- There are three forms: port alone, hostname with port, and
- IP address with port. If you specify a hostname or IP
- address, then Squid binds the socket to that specific
- address. This replaces the old 'tcp_incoming_address'
- option. Most likely, you do
- not need to bind to a specific
- address, so you can use the port number alone.
- If you are running Squid in accelerator mode, then you
- probably want to listen on port 80 also, or instead.
+COMMENT_START
+ LOGFILE PATHNAMES AND CACHE DIRECTORIES
+ -----------------------------------------------------------------------------
+COMMENT_END
- The -a command line option will override the *first* port
- number listed here. That option will NOT override an IP
- address, however.
+NAME: cache_dir
+TYPE: cachedir
+DEFAULT: none
+DEFAULT_IF_NONE: ufs @DEFAULT_SWAP_DIR@ 100 16 256
+LOC: Config.cacheSwap
+DOC_START
+ Usage:
+
+ cache_dir Type Directory-Name Fs-specific-data [options]
- You may specify multiple socket addresses on multiple lines.
+ cache_dir diskd Maxobjsize Directory-Name MB L1 L2 Q1 Q2
- options are:
- accel Accelerator mode
- transparent Support for transparent proxies
- vhost Accelerator using Host directive
- vport Accelerator with IP virtual host support
- vport=NN As above, but uses specified port number
- rather than the http_port number.
- defaultsite=xx Main web site name for accelerators.
- also implies accel
- protocol= Protocol to reconstruct accelerated
- requests with. Defaults to http.
+ You can specify multiple cache_dir lines to spread the
+ cache among different disk partitions.
- If you run Squid on a dual-homed machine with an internal
+ Type specifies the kind of storage system to use. Only "ufs"
+ is built by default. To eanble any of the other storage systems
+ see the --enable-storeio configure option.
- and an external interface then we recommend you to specify the
- internal address:port in http_port. This way Squid will only be
- visible on the internal address.
- NOCOMMENT_START
-# Squid normally listens to port 3128
- http_port 3128
- NOCOMMENT_END
- DOC_END
-
- NAME: https_port
- IFDEF: USE_SSL
- TYPE: https_port_list
- DEFAULT: none
- LOC: Config.Sockaddr.https
- DOC_START
- Usage: [ip:]port cert=certificate.pem [key=key.pem] [options...]
-
- The socket address where Squid will listen for HTTPS client
- requests.
-
- This is really only useful for situations where you are running
- squid in accelerator mode and you want to do
- the SSL work at the
- accelerator level.
-
- You may specify multiple socket addresses on multiple lines,
- each with their own SSL certificate and/or options.
-
- Options:
-
- defaultsite= The name of the https site presented on
- this port.
-
- protocol= Protocol to reconstruct accelerated requests
- with. Defaults to https.
-
- cert= Path to SSL certificate (PEM format)
-
- key= Path to SSL private key file (PEM format)
- if not specified, the certificate file is
- assumed to be a combined certificate and
- key file
-
- version= The version of SSL/TLS supported
- 1 automatic (default)
- 2 SSLv2 only
- 3 SSLv3 only
- 4 TLSv1 only
-
- cipher= Colon separated list of supported ciphers
-
- options= Varions SSL engine options. The most important
- being:
- NO_SSLv2 Disallow the use of SSLv2
- NO_SSLv3 Disallow the use of SSLv3
- NO_TLSv1 Disallow the use of TLSv1
- SINGLE_DH_USE Always create a new key when using
- temporary/ephemeral DH key exchanges
- See src/ssl_support.c or OpenSSL SSL_CTX_set_options
- documentation for a complete list of options.
-
- clientca= File containing the list of CAs to use when
- requesting a client certificate
-
- cafile= File containing additional CA certificates to
- use when verifying client certificates. If unset
- clientca will be used.
-
- capath= Directory containing additional CA certificates
- to use when verifying client certificates
-
- dhparams= File containing DH parameters for temporary/ephemeral
- DH key exchanges
-
- sslflags= Various flags modifying the use of SSL:
- DELAYED_AUTH
- Don't request client certificates
- immediately, but wait until acl processing
- requires a certificate
- NO_DEFAULT_CA
- Don't use the default CA list built in
- to OpenSSL.
-
- DOC_END
-
- NAME: ssl_unclean_shutdown
- IFDEF: USE_SSL
- TYPE: onoff
- DEFAULT: off
- LOC: Config.SSL.unclean_shutdown
- DOC_START
- Some browsers (especially MSIE) bugs out on SSL shutdown
- messages.
- DOC_END
-
- NAME: ssl_engine
- IFDEF: USE_SSL
- TYPE: string
- LOC: Config.SSL.ssl_engine
- DEFAULT: none
- DOC_START
- The openssl engine to use. You will need to set
- this if you
- would like to use hardware SSL acceleration for example.
- DOC_END
-
- NAME: sslproxy_client_certificate
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.cert
- TYPE: string
- DOC_START
- Client SSL Certificate to use when proxying https:// URLs
- DOC_END
-
- NAME: sslproxy_client_key
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.key
- TYPE: string
- DOC_START
- Client SSL Key to use when proxying https:// URLs
- DOC_END
-
- NAME: sslproxy_version
- IFDEF: USE_SSL
- DEFAULT: 1
- LOC: Config.ssl_client.version
- TYPE: int
- DOC_START
- SSL version level to use when proxying https:// URLs
- DOC_END
-
- NAME: sslproxy_options
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.options
- TYPE: string
- DOC_START
- SSL engine options to use when proxying https:// URLs
- DOC_END
-
- NAME: sslproxy_cipher
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.cipher
- TYPE: string
- DOC_START
- SSL cipher list to use when proxying https:// URLs
- DOC_END
-
- NAME: sslproxy_cafile
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.cafile
- TYPE: string
- DOC_START
- DOC_END
-
- NAME: sslproxy_capath
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.capath
- TYPE: string
- DOC_START
- DOC_END
-
- NAME: sslproxy_flags
- IFDEF: USE_SSL
- DEFAULT: none
- LOC: Config.ssl_client.flags
- TYPE: string
- DOC_START
- DOC_END
-
- NAME: icp_port udp_port
- TYPE: ushort
- DEFAULT: 0
- LOC: Config.Port.icp
- DOC_START
- The port number where Squid sends and receives ICP queries to
- and from neighbor caches. The standard UDP port for ICP is 3130.
- Default is disabled (0).
- NOCOMMENT_START
- icp_port 3130
- NOCOMMENT_END
- DOC_END
-
- NAME: htcp_port
- IFDEF: USE_HTCP
- TYPE: ushort
- DEFAULT: 4827
- LOC: Config.Port.htcp
- DOC_START
- The port number where Squid sends and receives HTCP queries to
- and from neighbor caches. Default is 4827. To disable use
- "0".
- DOC_END
-
-
- NAME: mcast_groups
- TYPE: wordlist
- LOC: Config.mcast_group_list
- DEFAULT: none
- DOC_START
- This tag specifies a list of multicast groups which your server
- should join to receive multicasted ICP queries.
-
- NOTE! Be very careful what you put here! Be sure you
- understand the difference between an ICP _query_ and an ICP
- _reply_. This option is to be set
- only if you want to RECEIVE
- multicast queries. Do NOT set
- this option to SEND multicast
- ICP (use cache_peer for that). ICP replies are always sent via
- unicast, so this option does not affect whether or not you will
- receive replies from multicast group members.
-
- You must be very careful to NOT use a multicast address which
- is already in use by another group of caches.
-
- If you are unsure about multicast, please read the Multicast
- chapter in the Squid FAQ (http://www.squid-cache.org/FAQ/).
-
- Usage: mcast_groups 239.128.16.128 224.0.1.20
-
- By default, Squid doesn't listen on any multicast groups.
- DOC_END
-
-
- NAME: udp_incoming_address
- TYPE: address
- LOC:Config.Addrs.udp_incoming
- DEFAULT: 0.0.0.0
- DOC_NONE
-
- NAME: udp_outgoing_address
- TYPE: address
- LOC: Config.Addrs.udp_outgoing
- DEFAULT: 255.255.255.255
- DOC_START
- udp_incoming_address is used for the ICP socket receiving packets
- from other caches.
- udp_outgoing_address is used for ICP packets sent out to other
- caches.
-
- The default behavior is to not bind to any specific address.
-
- A udp_incoming_address value of 0.0.0.0 indicates that Squid should
- listen for UDP messages on all available interfaces.
-
- If udp_outgoing_address is set to 255.255.255.255 (the default)
- then it will use the same socket as udp_incoming_address. Only
- change this if you want to have ICP queries sent using another
- address than where this Squid listens for ICP queries from other
- caches.
-
- NOTE, udp_incoming_address and udp_outgoing_address can not
- have the same value since they both use port 3130.
- DOC_END
-
- COMMENT_START
- OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: cache_peer
- TYPE: peer
- DEFAULT: none
- LOC: Config.peers
- DOC_START
- To specify other caches in a hierarchy, use the format:
-
- cache_peer hostname type http_port icp_port [options]
-
- For example,
-
-# proxy icp
-# hostname type port port options
-# -------------------- -------- ----- ----- -----------
- cache_peer parent.foo.net parent 3128 3130 [proxy-only]
- cache_peer sib1.foo.net sibling 3128 3130 [proxy-only]
- cache_peer sib2.foo.net sibling 3128 3130 [proxy-only]
-
- type: either 'parent', 'sibling', or 'multicast'.
-
- proxy_port: The port number where the cache listens for proxy
- requests.
-
- icp_port: Used for querying neighbor caches about
- objects. To have a non-ICP neighbor
- specify '7' for the ICP port and make sure the
- neighbor machine has the UDP echo port
- enabled in its /etc/inetd.conf file.
-
- options: proxy-only
- weight=n
- basetime=n
- ttl=n
- no-query
- background-ping
- default
- round-robin
- weighted-round-robin
- carp
- multicast-responder
- closest-only
- no-digest
- no-netdb-exchange
- no-delay
- login=user:password | PASS | *:password
- connect-timeout=nn
- digest-url=url
- allow-miss
- max-conn
- originserver
- name=xxx
- forceddomain=name
- ssl
- sslcert=/path/to/ssl/certificate
- sslkey=/path/to/ssl/key
- sslversion=1|2|3|4
- sslcipher=...
- ssloptions=...
- front-end-https[=on|auto]
-
- use 'proxy-only' to specify that objects fetched
- from this cache should not be saved locally.
-
- use 'weight=n' to specify a weighted parent.
- The weight must be an integer. The default weight
- is 1, larger weights are favored more.
-
- use 'basetime=n' to specify a base amount to
- be subtracted from round trip times of parents.
- It is subtracted before division by weight in calculating
- which parent to fectch from. If the rtt is less than the
- base time then the rtt is set to a minimal value.
-
- use 'ttl=n' to specify a IP multicast TTL to use
- when sending an ICP queries to this address.
- Only useful when sending to a multicast group.
- Because we don't accept ICP replies from random
- hosts, you must configure other group members as
- peers with the 'multicast-responder' option below.
-
- use 'no-query' to NOT send ICP queries to this
- neighbor.
-
- use 'background-ping' to only send ICP queries to this
- neighbor infrequently. This is used to keep the neighbor
- round trip time updated and is usually used in
- conjunction with weighted-round-robin.
-
- use 'default' if this is a parent cache which can
- be used as a "last-resort." You should probably
- only use 'default' in situations where you cannot
- use ICP with your parent cache(s).
-
- use 'round-robin' to define a set
- of parents which
- should be used in a round-robin fashion in the
- absence of any ICP queries.
-
- use 'weighted-round-robin' to define a set
- of parents
- which should be used in a round-robin fashion with the
- frequency of each parent being based on the round trip
- time. Closer parents are used more often.
- Usually used for background-ping parents.
-
- use 'carp' to define a set
- of parents which should
- be used as a CARP array. The requests will then be
- distributed among the parents based on the CARP load
- balancing hash function based on their weigth.
-
- 'multicast-responder' indicates that the named peer
- is a member of a multicast group. ICP queries will
- not be sent directly to the peer, but ICP replies
- will be accepted from it.
-
- 'closest-only' indicates that, for ICP_OP_MISS
- replies, we'll only forward CLOSEST_PARENT_MISSes
- and never FIRST_PARENT_MISSes.
-
- use 'no-digest' to NOT request cache digests from
- this neighbor.
-
- 'no-netdb-exchange' disables requesting ICMP
- RTT database (NetDB) from the neighbor.
-
- use 'no-delay' to prevent access to this neighbor
- from influencing the delay pools.
-
- use 'login=user:password' if this is a personal/workgroup
- proxy and your parent requires proxy authentication.
- Note: The string can include URL escapes (i.e. %20 for
- spaces). This also means that % must be written as %%.
-
- use 'login=PASS' if users must authenticate against
- the upstream proxy. This will pass the users credentials
- as they are to the peer proxy. This only works for the
- Basic HTTP authentication sheme. Note: To combine this
- with proxy_auth both proxies must share the same user
- database as HTTP only allows for one proxy login.
- Also be warned that this will expose your users proxy
- password to the peer. USE WITH CAUTION
-
- use 'login=*:password' to pass the username to the
- upstream cache, but with a fixed password. This is meant
- to be used when the peer is in another administrative
- domain, but it is still needed to identify each user.
- The star can optionally be followed by some extra
- information which is added to the username. This can
- be used to identify this proxy to the peer, similar to
- the login=username:password option above.
-
- use 'connect-timeout=nn' to specify a peer
- specific connect timeout (also see the
- peer_connect_timeout directive)
-
- use 'digest-url=url' to tell Squid to fetch the cache
- digest (if digests are enabled) for this host from
- the specified URL rather than the Squid default
- location.
-
- use 'allow-miss' to disable Squid's use of only-if-cached
- when forwarding requests to siblings. This is primarily
- useful when icp_hit_stale is used by the sibling. To
- extensive use of this option may result in forwarding
- loops, and you should avoid having two-way peerings
- with this option. (for example to deny peer usage on
- requests from peer by denying cache_peer_access if the
- source is a peer)
-
- use 'max-conn' to limit the amount of connections Squid
- may open to this peer.
-
- 'originserver' causes this parent peer to be contacted as
- a origin server. Meant to be used in accelerator setups.
-
- use 'name=xxx' if you have multiple peers on the same
- host but different ports. This name can then be used to
- differentiate the peers in cache_peer_access and similar
- directives.
-
- use 'forceddomain=name' to forcibly set
- the Host header
- of requests forwarded to this peer. Useful in accelerator
- setups where the server (peer) expects a certain domain
- name and using redirectors to feed this domainname
- is not feasible.
-
- use 'ssl' to indicate that connections to this peer should
- bs SSL/TLS encrypted.
-
- use 'sslcert=/path/to/ssl/certificate' to specify a client
- SSL certificate to use when connecting to this peer.
-
- use 'sslkey=/path/to/ssl/key' to specify the private SSL
- key corresponding to sslcert above. If 'sslkey' is not
- specified then 'sslcert' is assumed to reference a
- combined file containing both the certificate and the key.
-
- use sslversion=1|2|3|4 to specify the SSL version to use
- when connecting to this peer
- 1 = automatic (default)
- 2 = SSL v2 only
- 3 = SSL v3 only
- 4 = TLS v1 only
-
- use sslcipher=... to specify the list of valid SSL chipers
- to use when connecting to this peer
-
- use ssloptions=... to specify various SSL engine options:
- NO_SSLv2 Disallow the use of SSLv2
- NO_SSLv3 Disallow the use of SSLv3
- NO_TLSv1 Disallow the use of TLSv1
- See src/ssl_support.c or the OpenSSL documentation for
- a more complete list.
-
- use cafile=... to specify a file containing additional
- CA certificates to use when verifying the peer certificate
-
- use capath=... to specify a directory containing additional
- CA certificates to use when verifying the peer certificate
-
- use sslflags=... to specify various flags modifying the
- SSL implementation:
- DONT_VERIFY_PEER
- Accept certificates even if they fail to
- verify.
- NO_DEFAULT_CA
- Don't use the default CA list built in
- to OpenSSL.
- DONT_VERIFY_DOMAIN
- Don't verify that the peer certificate
- matches the server name
-
- use sslname= to specify the peer name as advertised
- in it's certificate. Used for verifying the correctness
- of the received peer certificate. If not specified the
- peer hostname will be used.
-
- use front-end-https to enable the "Front-End-Https: On"
- header needed when using Squid as a SSL frontend infront
- of Microsoft OWA. See MS KB document Q307347 for details
- on this header. If set to auto then the header will
- only be added if the request is forwarded as a https://
- URL.
-
- NOTE: non-ICP neighbors must be specified as 'parent'.
- DOC_END
-
- NAME: cache_peer_domain cache_host_domain
- TYPE: hostdomain
- DEFAULT: none
- LOC: none
- DOC_START
- Use to limit the domains for which a neighbor cache will be
- queried. Usage:
-
- cache_peer_domain cache-host domain [domain ...]
- cache_peer_domain cache-host !domain
-
- For example, specifying
-
- cache_peer_domain parent.foo.net .edu
-
- has the effect such that UDP query packets are sent to
- 'bigserver' only when the requested object exists on a
- server in the .edu domain. Prefixing the domainname
- with '!' means that the cache will be queried for objects
- NOT in that domain.
-
- NOTE: * Any number of domains may be given for a cache-host,
- either on the same or separate lines.
- * When multiple domains are given for a particular
- cache-host, the first matched domain is applied.
- * Cache hosts with no domain restrictions are queried
- for all requests.
- * There are no defaults.
- * There is also a 'cache_peer_access' tag in the ACL
- section.
- DOC_END
-
-
- NAME: neighbor_type_domain
- TYPE: hostdomaintype
- DEFAULT: none
- LOC: none
- DOC_START
- usage: neighbor_type_domain parent|sibling domain domain ...
-
- Modifying the neighbor type for specific domains is now
- possible. You can treat some domains differently than the the
- default neighbor type specified on the 'cache_peer' line.
- Normally it should only be necessary to list domains which
- should be treated differently because the default neighbor type
- applies for hostnames which do not match domains listed here.
-
- EXAMPLE:
- cache_peer parent cache.foo.org 3128 3130
- neighbor_type_domain cache.foo.org sibling .com .net
- neighbor_type_domain cache.foo.org sibling .au .de
- DOC_END
-
- NAME: icp_query_timeout
- COMMENT: (msec)
- DEFAULT: 0
- TYPE: int
- LOC: Config.Timeout.icp_query
- DOC_START
- Normally Squid will automatically determine an optimal ICP
- query timeout value based on the round-trip-time of recent ICP
- queries. If you want to override the value determined by
- Squid, set this 'icp_query_timeout' to a non-zero value. This
- value is specified in MILLISECONDS, so, to use a 2-second
- timeout (the old default), you would write:
-
- icp_query_timeout 2000
- DOC_END
-
- NAME: maximum_icp_query_timeout
- COMMENT: (msec)
- DEFAULT: 2000
- TYPE: int
- LOC: Config.Timeout.icp_query_max
- DOC_START
- Normally the ICP query timeout is determined dynamically. But
- sometimes it can lead to very large values (say 5 seconds).
- Use this option to put an upper limit on the dynamic timeout
- value. Do NOT use this option to always use a fixed (instead
- of a dynamic) timeout value. To set a fixed timeout see the
- 'icp_query_timeout' directive.
- DOC_END
-
- NAME: minimum_icp_query_timeout
- COMMENT: (msec)
- DEFAULT: 5
- TYPE: int
- LOC: Config.Timeout.icp_query_min
- DOC_START
- Normally the ICP query timeout is determined dynamically. But
- sometimes it can lead to very small timeouts, even lower than
- the normal latency variance on your link due to traffic.
- Use this option to put an lower limit on the dynamic timeout
- value. Do NOT use this option to always use a fixed (instead
- of a dynamic) timeout value. To set a fixed timeout see the
- 'icp_query_timeout' directive.
- DOC_END
-
- NAME: mcast_icp_query_timeout
- COMMENT: (msec)
- DEFAULT: 2000
- TYPE: int
- LOC: Config.Timeout.mcast_icp_query
- DOC_START
- For Multicast peers, Squid regularly sends out ICP "probes" to
- count how many other peers are listening on the given multicast
- address. This value specifies how long Squid should wait to
- count all the replies. The default is 2000 msec, or 2
- seconds.
- DOC_END
-
- NAME: dead_peer_timeout
- COMMENT: (seconds)
- DEFAULT: 10 seconds
- TYPE: time_t
- LOC: Config.Timeout.deadPeer
- DOC_START
- This controls how long Squid waits to declare a peer cache
- as "dead." If there are no ICP replies received in this
- amount of time, Squid will declare the peer dead and not
- expect to receive any further ICP replies. However, it
- continues to send ICP queries, and will mark the peer as
- alive upon receipt of the first subsequent ICP reply.
-
- This timeout also affects when Squid expects to receive ICP
- replies from peers. If more than 'dead_peer' seconds have
- passed since the last ICP reply was received, Squid will not
- expect to receive an ICP reply on the next query. Thus, if
- your time between requests is greater than this timeout, you
- will see a lot of requests sent DIRECT to origin servers
- instead of to your parents.
- DOC_END
-
-
- NAME: hierarchy_stoplist
- TYPE: wordlist
- DEFAULT: none
- LOC: Config.hierarchy_stoplist
- DOC_START
- A list of words which, if found in a URL, cause the object to
- be handled directly by this cache. In other words, use this
- to not query neighbor caches for certain objects. You may
- list this option multiple times.
- NOCOMMENT_START
-#We recommend you to use at least the following line.
- hierarchy_stoplist cgi-bin ?
- NOCOMMENT_END
- DOC_END
+ 'Directory' is a top-level directory where cache swap
+ files will be stored. If you want to use an entire disk
+ for caching, then this can be the mount-point directory.
+ The directory must exist and be writable by the Squid
+ process. Squid will NOT create this directory for you.
+ The ufs store type:
- NAME: no_cache
- TYPE: acl_access
- DEFAULT: none
- LOC: Config.accessList.noCache
- DOC_START
- A list of ACL elements which, if matched, cause the request to
- not be satisfied from the cache and the reply to not be cached.
- In other words, use this to force certain objects to never be cached.
+ "ufs" is the old well-known Squid storage format that has always
+ been there.
+
+ cache_dir ufs Directory-Name Mbytes L1 L2 [options]
+
+ 'Mbytes' is the amount of disk space (MB) to use under this
+ directory. The default is 100 MB. Change this to suit your
+ configuration. Do NOT put the size of your disk drive here.
+ Instead, if you want Squid to use the entire disk drive,
+ subtract 20% and use that value.
+
+ 'Level-1' is the number of first-level subdirectories which
+ will be created under the 'Directory'. The default is 16.
+
+ 'Level-2' is the number of second-level subdirectories which
+ will be created under each first-level directory. The default
+ is 256.
+
+ The aufs store type:
+
+ "aufs" uses the same storage format as "ufs", utilizing
+ POSIX-threads to avoid blocking the main Squid process on
+ disk-I/O. This was formerly known in Squid as async-io.
+
+ cache_dir aufs Directory-Name Mbytes L1 L2 [options]
+
+ see argument descriptions under ufs above
+
+ The diskd store type:
+
+ "diskd" uses the same storage format as "ufs", utilizing a
+ separate process to avoid blocking the main Squid process on
+ disk-I/O.
+
+ cache_dir diskd Directory-Name Mbytes L1 L2 [options] [Q1=n] [Q2=n]
+
+ see argument descriptions under ufs above
+
+ Q1 specifies the number of unacknowledged I/O requests when Squid
+ stops opening new files. If this many messages are in the queues,
+ Squid won't open new files. Default is 64
+
+ Q2 specifies the number of unacknowledged messages when Squid
+ starts blocking. If this many messages are in the queues,
+ Squid blocks until it recevies some replies. Default is 72
+
+ Common options:
+
+ read-only, this cache_dir is read only.
+
+ max-size=n, refers to the max object size this storedir supports.
+ It is used to initially choose the storedir to dump the object.
+ Note: To make optimal use of the max-size limits you should order
+ the cache_dir lines with the smallest max-size value first and the
+ ones with no max-size specification last.
+DOC_END
+
+
+NAME: cache_access_log
+TYPE: string
+DEFAULT: @DEFAULT_ACCESS_LOG@
+LOC: Config.Log.access
+DOC_START
+ Logs the client request activity. Contains an entry for
+ every HTTP and ICP queries received. To disable, enter "none".
+DOC_END
+
+
+NAME: cache_log
+TYPE: string
+DEFAULT: @DEFAULT_CACHE_LOG@
+LOC: Config.Log.log
+DOC_START
+ Cache logging file. This is where general information about
+ your cache's behavior goes. You can increase the amount of data
+ logged to this file with the "debug_options" tag below.
+DOC_END
+
+
+NAME: cache_store_log
+TYPE: string
+DEFAULT: @DEFAULT_STORE_LOG@
+LOC: Config.Log.store
+DOC_START
+ Logs the activities of the storage manager. Shows which
+ objects are ejected from the cache, and which objects are
+ saved and for how long. To disable, enter "none". There are
+ not really utilities to analyze this data, so you can safely
+ disable it.
+DOC_END
+
+
+NAME: cache_swap_log
+TYPE: string
+LOC: Config.Log.swap
+DEFAULT: none
+DOC_START
+ Location for the cache "swap.log." This log file holds the
+ metadata of objects saved on disk. It is used to rebuild the
+ cache during startup. Normally this file resides in each
+ 'cache_dir' directory, but you may specify an alternate
+ pathname here. Note you must give a full filename, not just
+ a directory. Since this is the index for the whole object
+ list you CANNOT periodically rotate it!
+
+ If %s can be used in the file name then it will be replaced with a
+ a representation of the cache_dir name where each / is replaced
+ with '.'. This is needed to allow adding/removing cache_dir
+ lines when cache_swap_log is being used.
+
+ If have more than one 'cache_dir', and %s is not used in the name
+ then these swap logs will have names such as:
+
+ cache_swap_log.00
+ cache_swap_log.01
+ cache_swap_log.02
+
+ The numbered extension (which is added automatically)
+ corresponds to the order of the 'cache_dir' lines in this
+ configuration file. If you change the order of the 'cache_dir'
+ lines in this file, then these log files will NOT correspond to
+ the correct 'cache_dir' entry (unless you manually rename
+ them). We recommend that you do NOT use this option. It is
+ better to keep these log files in each 'cache_dir' directory.
+DOC_END
+
+
+NAME: emulate_httpd_log
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.common_log
+DOC_START
+ The Cache can emulate the log file format which many 'httpd'
+ programs use. To disable/enable this emulation, set
+ emulate_httpd_log to 'off' or 'on'. The default
+ is to use the native log format since it includes useful
+ information that Squid-specific log analyzers use.
+DOC_END
+
+NAME: log_ip_on_direct
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.log_ip_on_direct
+DOC_START
+ Log the destination IP address in the hierarchy log tag when going
+ direct. Earlier Squid versions logged the hostname here. If you
+ prefer the old way set this to off.
+DOC_END
+
+NAME: mime_table
+TYPE: string
+DEFAULT: @DEFAULT_MIME_TABLE@
+LOC: Config.mimeTablePathname
+DOC_START
+ Pathname to Squid's MIME table. You shouldn't need to change
+ this, but the default file contains examples and formatting
+ information if you do.
+DOC_END
+
+
+NAME: log_mime_hdrs
+COMMENT: on|off
+TYPE: onoff
+LOC: Config.onoff.log_mime_hdrs
+DEFAULT: off
+DOC_START
+ The Cache can record both the request and the response MIME
+ headers for each HTTP transaction. The headers are encoded
+ safely and will appear as two bracketed fields at the end of
+ the access log (for either the native or httpd-emulated log
+ formats). To enable this logging set log_mime_hdrs to 'on'.
+DOC_END
+
+
+NAME: useragent_log
+TYPE: string
+LOC: Config.Log.useragent
+DEFAULT: none
+IFDEF: USE_USERAGENT_LOG
+DOC_START
+ Squid will write the User-Agent field from HTTP requests
+ to the filename specified here. By default useragent_log
+ is disabled.
+DOC_END
+
+
+NAME: referer_log
+TYPE: string
+LOC: Config.Log.referer
+DEFAULT: none
+IFDEF: USE_REFERER_LOG
+DOC_START
+ Squid will write the Referer field from HTTP requests to the
+ filename specified here. By default referer_log is disabled.
+DOC_END
+
+
+NAME: pid_filename
+TYPE: string
+DEFAULT: @DEFAULT_PID_FILE@
+LOC: Config.pidFilename
+DOC_START
+ A filename to write the process-id to. To disable, enter "none".
+DOC_END
+
+
+NAME: debug_options
+TYPE: eol
+DEFAULT: ALL,1
+LOC: Config.debugOptions
+DOC_START
+ Logging options are set as section,level where each source file
+ is assigned a unique section. Lower levels result in less
+ output, Full debugging (level 9) can result in a very large
+ log file, so be careful. The magic word "ALL" sets debugging
+ levels for all sections. We recommend normally running with
+ "ALL,1".
+DOC_END
+
+
+NAME: log_fqdn
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.log_fqdn
+DOC_START
+ Turn this on if you wish to log fully qualified domain names
+ in the access.log. To do this Squid does a DNS lookup of all
+ IP's connecting to it. This can (in some situations) increase
+ latency, which makes your cache seem slower for interactive
+ browsing.
+DOC_END
+
+
+NAME: client_netmask
+TYPE: address
+LOC: Config.Addrs.client_netmask
+DEFAULT: 255.255.255.255
+DOC_START
+ A netmask for client addresses in logfiles and cachemgr output.
+ Change this to protect the privacy of your cache clients.
+ A netmask of 255.255.255.0 will log all IP's in that range with
+ the last digit set to '0'.
+DOC_END
- You must use the word 'DENY' to indicate the ACL names which should
- NOT be cached.
- NOCOMMENT_START
-#We recommend you to use the following two lines.
- acl QUERY urlpath_regex cgi-bin \?
- no_cache deny QUERY
- NOCOMMENT_END
- DOC_END
-
- NAME: background_ping_rate
- COMMENT: time-units
- TYPE: time_t
- DEFAULT: 10 seconds
- LOC: Config.backgroundPingRate
- DOC_START
- Controls how often the ICP pings are sent to siblings that
- have background-ping set.
- DOC_END
-
-
- COMMENT_START
- OPTIONS WHICH AFFECT THE CACHE SIZE
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: cache_mem
- COMMENT: (bytes)
- TYPE: b_size_t
- DEFAULT: 8 MB
- LOC: Config.memMaxSize
- DOC_START
- NOTE: THIS PARAMETER DOES NOT SPECIFY THE MAXIMUM PROCESS SIZE.
- IT ONLY PLACES A LIMIT ON HOW MUCH ADDITIONAL MEMORY SQUID WILL
- USE AS A MEMORY CACHE OF OBJECTS. SQUID USES MEMORY FOR OTHER
- THINGS AS WELL. SEE THE SQUID FAQ SECTION 8 FOR DETAILS.
-
- 'cache_mem' specifies the ideal amount of memory to be used
- for:
- * In-Transit objects
- * Hot Objects
- * Negative-Cached objects
-
- Data for these objects are stored in 4 KB blocks. This
- parameter specifies the ideal upper limit on the total size of
- 4 KB blocks allocated. In-Transit objects take the highest
- priority.
-
- In-transit objects have priority over the others. When
- additional space is needed for incoming data, negative-cached
- and hot objects will be released. In other words, the
- negative-cached and hot objects will fill up any unused space
- not needed for in-transit objects.
-
- If circumstances require, this limit will be exceeded.
- Specifically, if your incoming request rate requires more than
- 'cache_mem' of memory to hold in-transit objects, Squid will
- exceed this limit to satisfy the new requests. When the load
- decreases, blocks will be freed until the high-water mark is
- reached. Thereafter, blocks will be used to store hot
- objects.
- DOC_END
-
-
- NAME: cache_swap_low
- COMMENT: (percent, 0-100)
- TYPE: int
- DEFAULT: 90
- LOC: Config.Swap.lowWaterMark
- DOC_NONE
-
- NAME: cache_swap_high
- COMMENT: (percent, 0-100)
- TYPE: int
- DEFAULT: 95
- LOC: Config.Swap.highWaterMark
- DOC_START
-
- The low- and high-water marks for cache object replacement.
- Replacement begins when the swap (disk) usage is above the
- low-water mark and attempts to maintain utilization near the
- low-water mark. As swap utilization gets close to high-water
- mark object eviction becomes more aggressive. If utilization is
- close to the low-water mark less replacement is done each time.
-
- Defaults are 90% and 95%. If you have a large cache, 5% could be
- hundreds of MB. If this is the case you may wish to set these
- numbers closer together.
- DOC_END
-
- NAME: maximum_object_size
- COMMENT: (bytes)
- TYPE: b_size_t
- DEFAULT: 4096 KB
- LOC: Config.Store.maxObjectSize
- DOC_START
- Objects larger than this size will NOT be saved on disk. The
- value is specified in kilobytes, and the default is 4MB. If
- you wish to get a high BYTES hit ratio, you should probably
- increase this (one 32 MB object hit counts for 3200 10KB
- hits). If you wish to increase speed more than your want to
- save bandwidth you should leave this low.
-
- NOTE: if using the LFUDA replacement policy you should increase
- this value to maximize the byte hit rate improvement of LFUDA!
- See replacement_policy below for a discussion of this policy.
- DOC_END
-
- NAME: minimum_object_size
- COMMENT: (bytes)
- TYPE: b_size_t
- DEFAULT: 0 KB
- LOC: Config.Store.minObjectSize
- DOC_START
- Objects smaller than this size will NOT be saved on disk. The
- value is specified in kilobytes, and the default is 0 KB, which
- means there is no minimum.
- DOC_END
-
- NAME: maximum_object_size_in_memory
- COMMENT: (bytes)
- TYPE: b_size_t
- DEFAULT: 8 KB
- LOC: Config.Store.maxInMemObjSize
- DOC_START
- Objects greater than this size will not be attempted to kept in
- the memory cache. This should be set high enough to keep objects
- accessed frequently in memory to improve performance whilst low
- enough to keep larger objects from hoarding cache_mem .
- DOC_END
-
- NAME: ipcache_size
- COMMENT: (number of entries)
- TYPE: int
- DEFAULT: 1024
- LOC: Config.ipcache.size
- DOC_NONE
-
- NAME: ipcache_low
- COMMENT: (percent)
- TYPE: int
- DEFAULT: 90
- LOC: Config.ipcache.low
- DOC_NONE
-
- NAME: ipcache_high
- COMMENT: (percent)
- TYPE: int
- DEFAULT: 95
- LOC: Config.ipcache.high
- DOC_START
- The size, low-, and high-water marks for the IP cache.
- DOC_END
-
- NAME: fqdncache_size
- COMMENT: (number of entries)
- TYPE: int
- DEFAULT: 1024
- LOC: Config.fqdncache.size
- DOC_START
- Maximum number of FQDN cache entries.
- DOC_END
-
- NAME: cache_replacement_policy
- TYPE: removalpolicy
- LOC: Config.replPolicy
- DEFAULT: lru
- DOC_START
- The cache replacement policy parameter determines which
- objects are evicted (replaced) when disk space is needed.
-
- lru : Squid's original list based LRU policy
- heap GDSF : Greedy-Dual Size Frequency
- heap LFUDA: Least Frequently Used with Dynamic Aging
- heap LRU : LRU policy implemented using a heap
-
- Applies to any cache_dir lines listed below this.
-
- The LRU policies keeps recently referenced objects.
-
- The heap GDSF policy optimizes object hit rate by keeping smaller
- popular objects in cache so it has a better chance of getting a
- hit. It achieves a lower byte hit rate than LFUDA though since
- it evicts larger (possibly popular) objects.
-
- The heap LFUDA policy keeps popular objects in cache regardless of
- their size and thus optimizes byte hit rate at the expense of
- hit rate since one large, popular object will prevent many
- smaller, slightly less popular objects from being cached.
-
- Both policies utilize a dynamic aging mechanism that prevents
- cache pollution that can otherwise occur with frequency-based
- replacement policies.
-
- NOTE: if using the LFUDA replacement policy you should increase
- the value of maximum_object_size above its default of 4096 KB to
- to maximize the potential byte hit rate improvement of LFUDA.
-
- For more information about the GDSF and LFUDA cache replacement
- policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html
- and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html.
- DOC_END
-
- NAME: memory_replacement_policy
- TYPE: removalpolicy
- LOC: Config.memPolicy
- DEFAULT: lru
- DOC_START
- The memory replacement policy parameter determines which
- objects are purged from memory when memory space is needed.
-
- See cache_replacement_policy for details.
- DOC_END
-
-
- COMMENT_START
- LOGFILE PATHNAMES AND CACHE DIRECTORIES
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: cache_dir
- TYPE: cachedir
- DEFAULT: none
- DEFAULT_IF_NONE: ufs @DEFAULT_SWAP_DIR@ 100 16 256
- LOC: Config.cacheSwap
- DOC_START
- Usage:
-
- cache_dir Type Directory-Name Fs-specific-data [options]
-
- cache_dir diskd Maxobjsize Directory-Name MB L1 L2 Q1 Q2
-
- You can specify multiple cache_dir lines to spread the
- cache among different disk partitions.
-
- Type specifies the kind of storage system to use. Only "ufs"
- is built by default. To eanble any of the other storage systems
- see the --enable-storeio configure option.
-
- 'Directory' is a top-level directory where cache swap
- files will be stored. If you want to use an entire disk
- for caching, then this can be the mount-point directory.
- The directory must exist and be writable by the Squid
- process. Squid will NOT create this directory for you.
-
- The ufs store type:
-
- "ufs" is the old well-known Squid storage format that has always
- been there.
-
- cache_dir ufs Directory-Name Mbytes L1 L2 [options]
-
- 'Mbytes' is the amount of disk space (MB) to use under this
- directory. The default is 100 MB. Change this to suit your
- configuration. Do NOT put the size of your disk drive here.
- Instead, if you want Squid to use the entire disk drive,
- subtract 20% and use that value.
-
- 'Level-1' is the number of first-level subdirectories which
- will be created under the 'Directory'. The default is 16.
-
- 'Level-2' is the number of second-level subdirectories which
- will be created under each first-level directory. The default
- is 256.
-
- The aufs store type:
-
- "aufs" uses the same storage format as "ufs", utilizing
- POSIX-threads to avoid blocking the main Squid process on
- disk-I/O. This was formerly known in Squid as async-io.
-
- cache_dir aufs Directory-Name Mbytes L1 L2 [options]
-
- see argument descriptions under ufs above
-
- The diskd store type:
-
- "diskd" uses the same storage format as "ufs", utilizing a
- separate process to avoid blocking the main Squid process on
- disk-I/O.
-
- cache_dir diskd Directory-Name Mbytes L1 L2 [options] [Q1=n] [Q2=n]
-
- see argument descriptions under ufs above
-
- Q1 specifies the number of unacknowledged I/O requests when Squid
- stops opening new files. If this many messages are in the queues,
- Squid won't open new files. Default is 64
-
- Q2 specifies the number of unacknowledged messages when Squid
- starts blocking. If this many messages are in the queues,
- Squid blocks until it recevies some replies. Default is 72
-
- Common options:
-
- read-only, this cache_dir is read only.
-
- max-size=n, refers to the max object size this storedir supports.
- It is used to initially choose the storedir to dump the object.
- Note: To make optimal use of the max-size limits you should order
- the cache_dir lines with the smallest max-size value first and the
- ones with no max-size specification last.
- DOC_END
-
-
- NAME: cache_access_log
- TYPE: string
- DEFAULT: @DEFAULT_ACCESS_LOG@
- LOC: Config.Log.access
- DOC_START
- Logs the client request activity. Contains an entry for
- every HTTP and ICP queries received. To disable, enter "none".
- DOC_END
-
-
- NAME: cache_log
- TYPE: string
- DEFAULT: @DEFAULT_CACHE_LOG@
- LOC: Config.Log.log
- DOC_START
- Cache logging file. This is where general information about
- your cache's behavior goes. You can increase the amount of data
- logged to this file with the "debug_options" tag below.
- DOC_END
-
-
- NAME: cache_store_log
- TYPE: string
- DEFAULT: @DEFAULT_STORE_LOG@
- LOC: Config.Log.store
- DOC_START
- Logs the activities of the storage manager. Shows which
- objects are ejected from the cache, and which objects are
- saved and for how long. To disable, enter "none". There are
- not really utilities to analyze this data, so you can safely
- disable it.
- DOC_END
-
-
- NAME: cache_swap_log
- TYPE: string
- LOC: Config.Log.swap
- DEFAULT: none
- DOC_START
- Location for the cache "swap.log." This log file holds the
- metadata of objects saved on disk. It is used to rebuild the
- cache during startup. Normally this file resides in each
- 'cache_dir' directory, but you may specify an alternate
- pathname here. Note you must give a full filename, not just
- a directory. Since this is the index for the whole object
- list you CANNOT periodically rotate it!
-
- If %s can be used in the file name then it will be replaced with a
- a representation of the cache_dir name where each / is replaced
- with '.'. This is needed to allow adding/removing cache_dir
- lines when cache_swap_log is being used.
-
- If have more than one 'cache_dir', and %s is not used in the name
- then these swap logs will have names such as:
-
- cache_swap_log.00
- cache_swap_log.01
- cache_swap_log.02
-
- The numbered extension (which is added automatically)
- corresponds to the order of the 'cache_dir' lines in this
- configuration file. If you change the order of the 'cache_dir'
- lines in this file, then these log files will NOT correspond to
- the correct 'cache_dir' entry (unless you manually rename
- them). We recommend that you do
- NOT use this option. It is
- better to keep these log files in each 'cache_dir' directory.
- DOC_END
-
-
- NAME: emulate_httpd_log
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.common_log
- DOC_START
- The Cache can emulate the log file format which many 'httpd'
- programs use. To disable/enable this emulation, set
- emulate_httpd_log to 'off' or 'on'. The default
- is to use the native log format since it includes useful
- information that Squid-specific log analyzers use.
- DOC_END
-
- NAME: log_ip_on_direct
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.log_ip_on_direct
- DOC_START
- Log the destination IP address in the hierarchy log tag when going
- direct. Earlier Squid versions logged the hostname here. If you
- prefer the old way set
- this to off.
- DOC_END
-
- NAME: mime_table
- TYPE: string
- DEFAULT: @DEFAULT_MIME_TABLE@
- LOC: Config.mimeTablePathname
- DOC_START
- Pathname to Squid's MIME table. You shouldn't need to change
- this, but the default file contains examples and formatting
- information if you do.
- DOC_END
-
-
- NAME: log_mime_hdrs
- COMMENT: on|off
- TYPE: onoff
- LOC: Config.onoff.log_mime_hdrs
- DEFAULT: off
- DOC_START
- The Cache can record both the request and the response MIME
- headers for each HTTP transaction. The headers are encoded
- safely and will appear as two bracketed fields at the end of
- the access log (for either the native or httpd-emulated log
- formats). To enable this logging set
- log_mime_hdrs to 'on'.
- DOC_END
-
-
- NAME: useragent_log
- TYPE: string
- LOC: Config.Log.useragent
- DEFAULT: none
- IFDEF: USE_USERAGENT_LOG
- DOC_START
- Squid will write the User-Agent field from HTTP requests
- to the filename specified here. By default useragent_log
- is disabled.
- DOC_END
-
-
- NAME: referer_log
- TYPE: string
- LOC: Config.Log.referer
- DEFAULT: none
- IFDEF: USE_REFERER_LOG
- DOC_START
- Squid will write the Referer field from HTTP requests to the
- filename specified here. By default referer_log is disabled.
- DOC_END
-
-
- NAME: pid_filename
- TYPE: string
- DEFAULT: @DEFAULT_PID_FILE@
- LOC: Config.pidFilename
- DOC_START
- A filename to write the process-id to. To disable, enter "none".
- DOC_END
-
-
- NAME: debug_options
- TYPE: eol
- DEFAULT: ALL,1
- LOC: Config.debugOptions
- DOC_START
- Logging options are set
- as section,level where each source file
- is assigned a unique section. Lower levels result in less
- output, Full debugging (level 9) can result in a very large
- log file, so be careful. The magic word "ALL" sets debugging
- levels for all sections. We recommend normally running with
- "ALL,1".
- DOC_END
-
-
- NAME: log_fqdn
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.log_fqdn
- DOC_START
- Turn this on if you wish to log fully qualified domain names
- in the access.log. To do
- this Squid does a DNS lookup of all
- IP's connecting to it. This can (in some situations) increase
- latency, which makes your cache seem slower for interactive
- browsing.
- DOC_END
-
-
- NAME: client_netmask
- TYPE: address
- LOC: Config.Addrs.client_netmask
- DEFAULT: 255.255.255.255
- DOC_START
- A netmask for client addresses in logfiles and cachemgr output.
- Change this to protect the privacy of your cache clients.
- A netmask of 255.255.255.0 will log all IP's in that range with
- the last digit set
- to '0'.
- DOC_END
-
-
- COMMENT_START
- OPTIONS FOR EXTERNAL SUPPORT PROGRAMS
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: ftp_user
- TYPE: string
- DEFAULT: Squid@
- LOC: Config.Ftp.anon_user
- DOC_START
- If you want the anonymous login password to be more informative
- (and enable the use of picky ftp servers), set
- this to something
- reasonable for your domain, like wwwuser@somewhere.net
-
- The reason why this is domainless by default is that the
- request can be made on the behalf of a user in any domain,
- depending on how the cache is used.
- Some ftp server also validate that the email address is valid
- (for example perl.com).
- DOC_END
-
- NAME: ftp_list_width
- TYPE: size_t
- DEFAULT: 32
- LOC: Config.Ftp.list_width
- DOC_START
- Sets the width of ftp listings. This should be set
- to fit in
- the width of a standard browser. Setting this too small
- can cut off long filenames when browsing ftp sites.
- DOC_END
-
- NAME: ftp_passive
- TYPE: onoff
- DEFAULT: on
- LOC: Config.Ftp.passive
- DOC_START
- If your firewall does not allow Squid to use passive
- connections, then turn off this option.
- DOC_END
-
- NAME: ftp_sanitycheck
- TYPE: onoff
- DEFAULT: on
- LOC: Config.Ftp.sanitycheck
- DOC_START
- For security and data integrity reasons Squid by default performs
- sanity checks of the addresses of FTP data connections ensure the
- data connection is to the requested server. If you need to allow
- FTP connections to servers using another IP address for the data
- connection then turn this off.
- DOC_END
-
- NAME: check_hostnames
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.check_hostnames
- DOC_START
- For security and stability reasons Squid by default checks
- hostnames for Internet standard RFC compliance. If you do
- not want
- Squid to perform these checks then turn this directive off.
- DOC_END
-
- NAME: cache_dns_program
- TYPE: string
- IFDEF: USE_DNSSERVERS
- DEFAULT: @DEFAULT_DNSSERVER@
- LOC: Config.Program.dnsserver
- DOC_START
- Specify the location of the executable for dnslookup process.
- DOC_END
-
- NAME: dns_children
- TYPE: int
- IFDEF: USE_DNSSERVERS
- DEFAULT: 5
- LOC: Config.dnsChildren
- DOC_START
- The number of processes spawn to service DNS name lookups.
- For heavily loaded caches on large servers, you should
- probably increase this value to at least 10. The maximum
- is 32. The default is 5.
-
- You must have at least one dnsserver process.
- DOC_END
-
- NAME: dns_retransmit_interval
- TYPE: time_t
- DEFAULT: 5 seconds
- LOC: Config.Timeout.idns_retransmit
- IFDEF: !USE_DNSSERVERS
- DOC_START
- Initial retransmit interval for DNS queries. The interval is
- doubled each time all configured DNS servers have been tried.
-
- DOC_END
-
- NAME: dns_timeout
- TYPE: time_t
- DEFAULT: 5 minutes
- LOC: Config.Timeout.idns_query
- IFDEF: !USE_DNSSERVERS
- DOC_START
- DNS Query timeout. If no response is received to a DNS query
- within this time then all DNS servers for the queried domain
- is assumed to be unavailable.
- DOC_END
-
- NAME: dns_defnames
- COMMENT: on|off
- IFDEF: USE_DNSSERVERS
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.res_defnames
- IFDEF: USE_DNSSERVERS
- DOC_START
- Normally the 'dnsserver' disables the RES_DEFNAMES resolver
- option (see res_init(3)). This prevents caches in a hierarchy
- from interpreting single-component hostnames locally. To allow
- dnsserver to handle single-component names, enable this
- option.
- DOC_END
-
- NAME: dns_nameservers
- TYPE: wordlist
- DEFAULT: none
- LOC: Config.dns_nameservers
- DOC_START
- Use this if you want to specify a list of DNS name servers
- (IP addresses) to use instead of those given in your
- /etc/resolv.conf file.
- On Windows platforms, if no value is specified here or in
- the /etc/resolv.conf file, the list of DNS name servers are
- taken from the Windows registry, both static and dynamic DHCP
- configurations are supported.
-
- Example: dns_nameservers 10.0.0.1 192.172.0.4
- DOC_END
-
- NAME: hosts_file
- TYPE: string
- DEFAULT: @DEFAULT_HOSTS@
- LOC: Config.etcHostsPath
- DOC_START
- Location of the host-local IP name-address associations
- database. Most Operating Systems have such a file on different
- default locations:
- - Un*X & Linux: /etc/hosts
- - Windows NT/2000: %SystemRoot%\system32\drivers\etc\hosts
- (%SystemRoot% value install default is c:\winnt)
- - Windows XP: %SystemRoot%\system32\drivers\etc\hosts
- (%SystemRoot% value install default is c:\windows)
- - Windows 9x/Me: %windir%\hosts
- (%windir% value is usually c:\windows)
- - Cygwin: /etc/hosts
-
- The file contains newline-separated definitions, in the
- form ip_address_in_dotted_form name [name ...] names are
- whitespace-separated. Lines beginnng with an hash (#)
- character are comments.
-
- The file is checked at startup and upon configuration.
- If set
- to 'none', it won't be checked.
- If append_domain is used, that domain will be added to
- domain-local (i.e. not containing any dot character) host
- definitions.
- DOC_END
-
- NAME: diskd_program
- TYPE: string
- DEFAULT: @DEFAULT_DISKD@
- LOC: Config.Program.diskd
- DOC_START
- Specify the location of the diskd executable.
- Note that this is only useful if you have compiled in
- diskd as one of the store io modules.
- DOC_END
-
- NAME: unlinkd_program
- IFDEF: USE_UNLINKD
- TYPE: string
- DEFAULT: @DEFAULT_UNLINKD@
- LOC: Config.Program.unlinkd
- DOC_START
- Specify the location of the executable for file deletion process.
- DOC_END
-
- NAME: pinger_program
- TYPE: string
- DEFAULT: @DEFAULT_PINGER@
- LOC: Config.Program.pinger
- IFDEF: USE_ICMP
- DOC_START
- Specify the location of the executable for the pinger process.
- DOC_END
-
-
- NAME: redirect_program
- TYPE: wordlist
- LOC: Config.Program.redirect
- DEFAULT: none
- DOC_START
- Specify the location of the executable for the URL redirector.
- Since they can perform almost any function there isn't one included.
- See the FAQ (section 15) for information on how to write one.
- By default, a redirector is not used.
- DOC_END
-
-
- NAME: redirect_children
- TYPE: int
- DEFAULT: 5
- LOC: Config.redirectChildren
- DOC_START
- The number of redirector processes to spawn. If you start
- too few Squid will have to wait for them to process a backlog of
- URLs, slowing it down. If you start too many they will use RAM
- and other system resources.
- DOC_END
-
- NAME: redirect_rewrites_host_header
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.redir_rewrites_host
- DOC_START
- By default Squid rewrites any Host: header in redirected
- requests. If you are running an accelerator then this may
- not be a wanted effect of a redirector.
-
- WARNING: Entries are cached on the result of the URL rewriting
- process, so be careful if you have domain-virtual hosts.
- DOC_END
-
- NAME: redirector_access
- TYPE: acl_access
- DEFAULT: none
- LOC: Config.accessList.redirector
- DOC_START
- If defined, this access list specifies which requests are
- sent to the redirector processes. By default all requests
- are sent.
- DOC_END
-
- NAME: auth_param
- TYPE: authparam
- LOC: Config.authConfiguration
- DEFAULT: none
- DOC_START
- This is used to pass parameters to the various authentication
- schemes.
- format: auth_param scheme parameter [setting]
-
- auth_param basic program @DEFAULT_PREFIX@/bin/ncsa_auth @DEFAULT_PREFIX@/etc/passwd
- would tell the basic authentication scheme it's program parameter.
-
- The order that authentication prompts are presented to the client_agent
- is dependant on the order the scheme first appears in config file.
- IE has a bug (it's not rfc 2617 compliant) in that it will use the basic
- scheme if basic is the first entry presented, even if more secure schemes
- are presented. For now use the order in the file below. If other browsers
- have difficulties (don't recognise the schemes offered even if you are using
- basic) then either put basic first, or disable the other schemes (by commenting
- out their program entry).
-
- Once an authentication scheme is fully configured, it can only be shutdown
- by shutting squid down and restarting. Changes can be made on the fly and
- activated with a reconfigure. I.E. You can change to a different helper,
- but not unconfigure the helper completely.
-
- === Parameters for the basic scheme follow. ===
-
- "program" cmdline
- Specify the command for the external authenticator. Such a
- program reads a line containing "username password" and replies
- "OK" or "ERR" in an endless loop. If you use an authenticator,
- make sure you have 1 acl of type proxy_auth. By default, the
- basic authentication sheme is not used unless a program is specified.
-
- If you want to use the traditional proxy authentication,
- jump over to the ../auth_modules/NCSA directory and
- type:
- % make
- % make install
-
- Then, set this line to something like
-
- auth_param basic program @DEFAULT_PREFIX@/bin/ncsa_auth @DEFAULT_PREFIX@/etc/passwd
-
- "children" numberofchildren
- The number of authenticator processes to spawn (no default).
- If you start too few Squid will have to wait for them to
- process a backlog of usercode/password verifications, slowing
- it down. When password verifications are done via a (slow)
- network you are likely to need lots of authenticator
- processes.
- auth_param basic children 5
-
- "realm" realmstring
- Specifies the realm name which is to be reported to the
- client for the basic proxy authentication scheme (part of
- the text the user will see when prompted their username and
- password). There is no default.
- auth_param basic realm Squid proxy-caching web server
-
- "credentialsttl" timetolive
- Specifies how long squid assumes an externally validated
- username:password pair is valid for - in other words how
- often the helper program is called for that user. Set this
- low to force revalidation with short lived passwords. Note
- that setting this high does not impact your susceptability
- to replay attacks unless you are using an one-time password
- system (such as SecureID). If you are using such a system,
- you will be vulnerable to replay attacks unless you also
- use the max_user_ip ACL in an http_access rule.
-
- === Parameters for the digest scheme follow ===
-
- "program" cmdline
- Specify the command for the external authenticator. Such
- a program reads a line containing "username":"realm" and
- replies with the appropriate H(A1) value base64 encoded.
- See rfc 2616 for the definition of H(A1). If you use an
- authenticator, make sure you have 1 acl of type proxy_auth.
- By default, authentication is not used.
-
- If you want to use build an authenticator,
- jump over to the ../digest_auth_modules directory and choose the
- authenticator to use. It it's directory type
- % make
- % make install
-
- Then, set
- this line to something like
-
- auth_param digest program @DEFAULT_PREFIX@/bin/digest_auth_pw @DEFAULT_PREFIX@/etc/digpass
-
-
- "children" numberofchildren
- The number of authenticator processes to spawn (no default).
- If you start too few Squid will have to wait for them to
- process a backlog of H(A1) calculations, slowing it down.
- When the H(A1) calculations are done via a (slow) network
- you are likely to need lots of authenticator processes.
- auth_param digest children 5
-
- "realm" realmstring
- Specifies the realm name which is to be reported to the
- client for the digest proxy authentication scheme (part of
- the text the user will see when prompted their username and
- password). There is no default.
- auth_param digest realm Squid proxy-caching web server
-
- "nonce_garbage_interval" timeinterval
- Specifies the interval that nonces that have been issued
- to client_agent's are checked for validity.
-
- "nonce_max_duration" timeinterval
- Specifies the maximum length of time a given nonce will be
- valid for.
-
- "nonce_max_count" number
- Specifies the maximum number of times a given nonce can be
- used.
-
- "nonce_strictness" on|off
- Determines if squid requires increment-by-1 behaviour for
- nonce counts (on - the default), or strictly incrementing
- (off - for use when useragents generate nonce counts that
- occasionally miss 1 (ie, 1,2,4,6)).
-
- === NTLM scheme options follow ===
-
- "program" cmdline
- Specify the command for the external ntlm authenticator.
- Such a program reads a line containing the uuencoded NEGOTIATE
- and replies with the ntlm CHALLENGE, then waits for the
- response and answers with "OK" or "ERR" in an endless loop.
- If you use an ntlm authenticator, make sure you have 1 acl
- of type proxy_auth. By default, the ntlm authenticator_program
- is not used.
-
- auth_param ntlm program @DEFAULT_PREFIX@/bin/ntlm_auth
-
- "children" numberofchildren
- The number of authenticator processes to spawn (no default).
- If you start too few Squid will have to wait for them to
- process a backlog of credential verifications, slowing it
- down. When crendential verifications are done via a (slow)
- network you are likely to need lots of authenticator
- processes.
- auth_param ntlm children 5
-
- "max_challenge_reuses" number
- The maximum number of times a challenge given by a ntlm
- authentication helper can be reused. Increasing this number
- increases your exposure to replay attacks on your network.
- 0 means use the challenge only once. (disable challenge
- caching) See max_ntlm_challenge_lifetime for more information.
- auth_param ntlm max_challenge_reuses 0
-
- "max_challenge_lifetime" timespan
- The maximum time period that a ntlm challenge is reused
- over. The actual period will be the minimum of this time
- AND the number of reused challenges.
- auth_param ntlm max_challenge_lifetime 2 minutes
-
- NOCOMMENT_START
+COMMENT_START
+ OPTIONS FOR EXTERNAL SUPPORT PROGRAMS
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: ftp_user
+TYPE: string
+DEFAULT: Squid@
+LOC: Config.Ftp.anon_user
+DOC_START
+ If you want the anonymous login password to be more informative
+ (and enable the use of picky ftp servers), set this to something
+ reasonable for your domain, like wwwuser@somewhere.net
+
+ The reason why this is domainless by default is that the
+ request can be made on the behalf of a user in any domain,
+ depending on how the cache is used.
+ Some ftp server also validate that the email address is valid
+ (for example perl.com).
+DOC_END
+
+NAME: ftp_list_width
+TYPE: size_t
+DEFAULT: 32
+LOC: Config.Ftp.list_width
+DOC_START
+ Sets the width of ftp listings. This should be set to fit in
+ the width of a standard browser. Setting this too small
+ can cut off long filenames when browsing ftp sites.
+DOC_END
+
+NAME: ftp_passive
+TYPE: onoff
+DEFAULT: on
+LOC: Config.Ftp.passive
+DOC_START
+ If your firewall does not allow Squid to use passive
+ connections, then turn off this option.
+DOC_END
+
+NAME: ftp_sanitycheck
+TYPE: onoff
+DEFAULT: on
+LOC: Config.Ftp.sanitycheck
+DOC_START
+ For security and data integrity reasons Squid by default performs
+ sanity checks of the addresses of FTP data connections ensure the
+ data connection is to the requested server. If you need to allow
+ FTP connections to servers using another IP address for the data
+ connection then turn this off.
+DOC_END
+
+NAME: check_hostnames
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.check_hostnames
+DOC_START
+ For security and stability reasons Squid by default checks
+ hostnames for Internet standard RFC compliance. If you do not want
+ Squid to perform these checks then turn this directive off.
+DOC_END
+
+NAME: cache_dns_program
+TYPE: string
+IFDEF: USE_DNSSERVERS
+DEFAULT: @DEFAULT_DNSSERVER@
+LOC: Config.Program.dnsserver
+DOC_START
+ Specify the location of the executable for dnslookup process.
+DOC_END
+
+NAME: dns_children
+TYPE: int
+IFDEF: USE_DNSSERVERS
+DEFAULT: 5
+LOC: Config.dnsChildren
+DOC_START
+ The number of processes spawn to service DNS name lookups.
+ For heavily loaded caches on large servers, you should
+ probably increase this value to at least 10. The maximum
+ is 32. The default is 5.
+
+ You must have at least one dnsserver process.
+DOC_END
+
+NAME: dns_retransmit_interval
+TYPE: time_t
+DEFAULT: 5 seconds
+LOC: Config.Timeout.idns_retransmit
+IFDEF: !USE_DNSSERVERS
+DOC_START
+ Initial retransmit interval for DNS queries. The interval is
+ doubled each time all configured DNS servers have been tried.
+
+DOC_END
+
+NAME: dns_timeout
+TYPE: time_t
+DEFAULT: 5 minutes
+LOC: Config.Timeout.idns_query
+IFDEF: !USE_DNSSERVERS
+DOC_START
+ DNS Query timeout. If no response is received to a DNS query
+ within this time then all DNS servers for the queried domain
+ is assumed to be unavailable.
+DOC_END
+
+NAME: dns_defnames
+COMMENT: on|off
+IFDEF: USE_DNSSERVERS
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.res_defnames
+IFDEF: USE_DNSSERVERS
+DOC_START
+ Normally the 'dnsserver' disables the RES_DEFNAMES resolver
+ option (see res_init(3)). This prevents caches in a hierarchy
+ from interpreting single-component hostnames locally. To allow
+ dnsserver to handle single-component names, enable this
+ option.
+DOC_END
+
+NAME: dns_nameservers
+TYPE: wordlist
+DEFAULT: none
+LOC: Config.dns_nameservers
+DOC_START
+ Use this if you want to specify a list of DNS name servers
+ (IP addresses) to use instead of those given in your
+ /etc/resolv.conf file.
+ On Windows platforms, if no value is specified here or in
+ the /etc/resolv.conf file, the list of DNS name servers are
+ taken from the Windows registry, both static and dynamic DHCP
+ configurations are supported.
+
+ Example: dns_nameservers 10.0.0.1 192.172.0.4
+DOC_END
+
+NAME: hosts_file
+TYPE: string
+DEFAULT: @DEFAULT_HOSTS@
+LOC: Config.etcHostsPath
+DOC_START
+ Location of the host-local IP name-address associations
+ database. Most Operating Systems have such a file on different
+ default locations:
+ - Un*X & Linux: /etc/hosts
+ - Windows NT/2000: %SystemRoot%\system32\drivers\etc\hosts
+ (%SystemRoot% value install default is c:\winnt)
+ - Windows XP: %SystemRoot%\system32\drivers\etc\hosts
+ (%SystemRoot% value install default is c:\windows)
+ - Windows 9x/Me: %windir%\hosts
+ (%windir% value is usually c:\windows)
+ - Cygwin: /etc/hosts
+
+ The file contains newline-separated definitions, in the
+ form ip_address_in_dotted_form name [name ...] names are
+ whitespace-separated. Lines beginnng with an hash (#)
+ character are comments.
+
+ The file is checked at startup and upon configuration.
+ If set to 'none', it won't be checked.
+ If append_domain is used, that domain will be added to
+ domain-local (i.e. not containing any dot character) host
+ definitions.
+DOC_END
+
+NAME: diskd_program
+TYPE: string
+DEFAULT: @DEFAULT_DISKD@
+LOC: Config.Program.diskd
+DOC_START
+ Specify the location of the diskd executable.
+ Note that this is only useful if you have compiled in
+ diskd as one of the store io modules.
+DOC_END
+
+NAME: unlinkd_program
+IFDEF: USE_UNLINKD
+TYPE: string
+DEFAULT: @DEFAULT_UNLINKD@
+LOC: Config.Program.unlinkd
+DOC_START
+ Specify the location of the executable for file deletion process.
+DOC_END
+
+NAME: pinger_program
+TYPE: string
+DEFAULT: @DEFAULT_PINGER@
+LOC: Config.Program.pinger
+IFDEF: USE_ICMP
+DOC_START
+ Specify the location of the executable for the pinger process.
+DOC_END
+
+
+NAME: redirect_program
+TYPE: wordlist
+LOC: Config.Program.redirect
+DEFAULT: none
+DOC_START
+ Specify the location of the executable for the URL redirector.
+ Since they can perform almost any function there isn't one included.
+ See the FAQ (section 15) for information on how to write one.
+ By default, a redirector is not used.
+DOC_END
+
+
+NAME: redirect_children
+TYPE: int
+DEFAULT: 5
+LOC: Config.redirectChildren
+DOC_START
+ The number of redirector processes to spawn. If you start
+ too few Squid will have to wait for them to process a backlog of
+ URLs, slowing it down. If you start too many they will use RAM
+ and other system resources.
+DOC_END
+
+NAME: redirect_rewrites_host_header
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.redir_rewrites_host
+DOC_START
+ By default Squid rewrites any Host: header in redirected
+ requests. If you are running an accelerator then this may
+ not be a wanted effect of a redirector.
+
+ WARNING: Entries are cached on the result of the URL rewriting
+ process, so be careful if you have domain-virtual hosts.
+DOC_END
+
+NAME: redirector_access
+TYPE: acl_access
+DEFAULT: none
+LOC: Config.accessList.redirector
+DOC_START
+ If defined, this access list specifies which requests are
+ sent to the redirector processes. By default all requests
+ are sent.
+DOC_END
+
+NAME: auth_param
+TYPE: authparam
+LOC: Config.authConfiguration
+DEFAULT: none
+DOC_START
+ This is used to pass parameters to the various authentication
+ schemes.
+ format: auth_param scheme parameter [setting]
+
+ auth_param basic program @DEFAULT_PREFIX@/bin/ncsa_auth @DEFAULT_PREFIX@/etc/passwd
+ would tell the basic authentication scheme it's program parameter.
+
+ The order that authentication prompts are presented to the client_agent
+ is dependant on the order the scheme first appears in config file.
+ IE has a bug (it's not rfc 2617 compliant) in that it will use the basic
+ scheme if basic is the first entry presented, even if more secure schemes
+ are presented. For now use the order in the file below. If other browsers
+ have difficulties (don't recognise the schemes offered even if you are using
+ basic) then either put basic first, or disable the other schemes (by commenting
+ out their program entry).
+
+ Once an authentication scheme is fully configured, it can only be shutdown
+ by shutting squid down and restarting. Changes can be made on the fly and
+ activated with a reconfigure. I.E. You can change to a different helper,
+ but not unconfigure the helper completely.
+
+ === Parameters for the basic scheme follow. ===
+
+ "program" cmdline
+ Specify the command for the external authenticator. Such a
+ program reads a line containing "username password" and replies
+ "OK" or "ERR" in an endless loop. If you use an authenticator,
+ make sure you have 1 acl of type proxy_auth. By default, the
+ basic authentication sheme is not used unless a program is specified.
+
+ If you want to use the traditional proxy authentication,
+ jump over to the ../auth_modules/NCSA directory and
+ type:
+ % make
+ % make install
+
+ Then, set this line to something like
+
+ auth_param basic program @DEFAULT_PREFIX@/bin/ncsa_auth @DEFAULT_PREFIX@/etc/passwd
+
+ "children" numberofchildren
+ The number of authenticator processes to spawn (no default).
+ If you start too few Squid will have to wait for them to
+ process a backlog of usercode/password verifications, slowing
+ it down. When password verifications are done via a (slow)
+ network you are likely to need lots of authenticator
+ processes.
+ auth_param basic children 5
+
+ "realm" realmstring
+ Specifies the realm name which is to be reported to the
+ client for the basic proxy authentication scheme (part of
+ the text the user will see when prompted their username and
+ password). There is no default.
+ auth_param basic realm Squid proxy-caching web server
+
+ "credentialsttl" timetolive
+ Specifies how long squid assumes an externally validated
+ username:password pair is valid for - in other words how
+ often the helper program is called for that user. Set this
+ low to force revalidation with short lived passwords. Note
+ that setting this high does not impact your susceptability
+ to replay attacks unless you are using an one-time password
+ system (such as SecureID). If you are using such a system,
+ you will be vulnerable to replay attacks unless you also
+ use the max_user_ip ACL in an http_access rule.
+
+ === Parameters for the digest scheme follow ===
+
+ "program" cmdline
+ Specify the command for the external authenticator. Such
+ a program reads a line containing "username":"realm" and
+ replies with the appropriate H(A1) value base64 encoded.
+ See rfc 2616 for the definition of H(A1). If you use an
+ authenticator, make sure you have 1 acl of type proxy_auth.
+ By default, authentication is not used.
+
+ If you want to use build an authenticator,
+ jump over to the ../digest_auth_modules directory and choose the
+ authenticator to use. It it's directory type
+ % make
+ % make install
+
+ Then, set this line to something like
+
+ auth_param digest program @DEFAULT_PREFIX@/bin/digest_auth_pw @DEFAULT_PREFIX@/etc/digpass
+
+
+ "children" numberofchildren
+ The number of authenticator processes to spawn (no default).
+ If you start too few Squid will have to wait for them to
+ process a backlog of H(A1) calculations, slowing it down.
+ When the H(A1) calculations are done via a (slow) network
+ you are likely to need lots of authenticator processes.
+ auth_param digest children 5
+
+ "realm" realmstring
+ Specifies the realm name which is to be reported to the
+ client for the digest proxy authentication scheme (part of
+ the text the user will see when prompted their username and
+ password). There is no default.
+ auth_param digest realm Squid proxy-caching web server
+
+ "nonce_garbage_interval" timeinterval
+ Specifies the interval that nonces that have been issued
+ to client_agent's are checked for validity.
+
+ "nonce_max_duration" timeinterval
+ Specifies the maximum length of time a given nonce will be
+ valid for.
+
+ "nonce_max_count" number
+ Specifies the maximum number of times a given nonce can be
+ used.
+
+ "nonce_strictness" on|off
+ Determines if squid requires increment-by-1 behaviour for
+ nonce counts (on - the default), or strictly incrementing
+ (off - for use when useragents generate nonce counts that
+ occasionally miss 1 (ie, 1,2,4,6)).
+
+ === NTLM scheme options follow ===
+
+ "program" cmdline
+ Specify the command for the external ntlm authenticator.
+ Such a program reads a line containing the uuencoded NEGOTIATE
+ and replies with the ntlm CHALLENGE, then waits for the
+ response and answers with "OK" or "ERR" in an endless loop.
+ If you use an ntlm authenticator, make sure you have 1 acl
+ of type proxy_auth. By default, the ntlm authenticator_program
+ is not used.
+
+ auth_param ntlm program @DEFAULT_PREFIX@/bin/ntlm_auth
+
+ "children" numberofchildren
+ The number of authenticator processes to spawn (no default).
+ If you start too few Squid will have to wait for them to
+ process a backlog of credential verifications, slowing it
+ down. When crendential verifications are done via a (slow)
+ network you are likely to need lots of authenticator
+ processes.
+ auth_param ntlm children 5
+
+ "max_challenge_reuses" number
+ The maximum number of times a challenge given by a ntlm
+ authentication helper can be reused. Increasing this number
+ increases your exposure to replay attacks on your network.
+ 0 means use the challenge only once. (disable challenge
+ caching) See max_ntlm_challenge_lifetime for more information.
+ auth_param ntlm max_challenge_reuses 0
+
+ "max_challenge_lifetime" timespan
+ The maximum time period that a ntlm challenge is reused
+ over. The actual period will be the minimum of this time
+ AND the number of reused challenges.
+ auth_param ntlm max_challenge_lifetime 2 minutes
+
+NOCOMMENT_START
#Recommended minimum configuration:
#auth_param digest program <uncomment and complete this line>
#auth_param digest children 5
#auth_param ntlm max_challenge_reuses 0
#auth_param ntlm max_challenge_lifetime 2 minutes
#auth_param basic program <uncomment and complete this line>
- auth_param basic children 5
- auth_param basic realm Squid proxy-caching web server
- auth_param basic credentialsttl 2 hours
- NOCOMMENT_END
- DOC_END
-
- NAME: authenticate_cache_garbage_interval
- TYPE: time_t
- DEFAULT: 1 hour
- LOC: Config.authenticateGCInterval
- DOC_START
- The time period between garbage collection across the
- username cache. This is a tradeoff between memory utilisation
- (long intervals - say 2 days) and CPU (short intervals -
- say 1 minute). Only change if you have good reason to.
- DOC_END
-
- NAME: authenticate_ttl
- TYPE: time_t
- DEFAULT: 1 hour
- LOC: Config.authenticateTTL
- DOC_START
- The time a user & their credentials stay in the logged in
- user cache since their last request. When the garbage
- interval passes, all user credentials that have passed their
- TTL are removed from memory.
- DOC_END
-
- NAME: authenticate_ip_ttl
- TYPE: time_t
- LOC: Config.authenticateIpTTL
- DEFAULT: 0 seconds
- DOC_START
- If you use proxy authentication and the 'max_user_ip' ACL,
- this directive controls how long Squid remembers the IP
- addresses associated with each user. Use a small value
- (e.g., 60 seconds) if your users might change addresses
- quickly, as is the case with dialups. You might be safe
- using a larger value (e.g., 2 hours) in a corporate LAN
- environment with relatively static address assignments.
- DOC_END
-
- NAME: external_acl_type
- TYPE: externalAclHelper
- LOC: Config.externalAclHelperList
- DEFAULT: none
- DOC_START
- This option defines external acl classes using a helper program
- to look up the status
-
- external_acl_type name [options] FORMAT.. /path/to/helper [helper arguments..]
-
- Options:
-
- ttl=n TTL in seconds for cached results (defaults to 3600
- for 1 hour)
- negative_ttl=n
- TTL for cached negative lookups (default same
- as ttl)
- children=n Number of acl helper processes spawn to service
- external acl lookups of this type.
- cache=n result cache size, 0 is unbounded (default)
-
- FORMAT specifications
-
- %LOGIN Authenticated user login name
- %IDENT Ident user name
- %SRC Client IP
- %DST Requested host
- %PROTO Requested protocol
- %PORT Requested port
- %PATH Requested URL path
- %METHOD Request method
- %USER_CERT_xx SSL User certificate attribute xx
- %USER_CA_xx SSL User certificate CA attribute xx
- %{Header} HTTP request header
- %{Hdr:member} HTTP request header list member
- %{Hdr:;member}
- HTTP request header list member using ; as
- list separator. ; can be any non-alphanumeric
- character.
-
- In addition, any string specified in the referencing acl will
- also be included in the helper request line, after the specified
- formats (see the "acl external" directive)
-
- The helper receives lines per the above format specification,
- and returns lines starting with OK or ERR indicating the validity
- of the request and optionally followed by additional keywords with
- more details.
-
- General result syntax:
-
- OK/ERR keyword=value ...
-
- Defined keywords:
-
- user= The users name (login)
- error= Error description (only defined for ERR results)
- tag= Apply a tag to a request (for both ERR and OK results)
- Only sets a tag, does not alter existing tags.
-
- Keyword values need to be enclosed in quotes if they may
- contain whitespace, or the whitespace escaped using \. Any
- quotes or \ characters within the keyword value must be \
- escaped.
- DOC_END
-
- COMMENT_START
- OPTIONS FOR TUNING THE CACHE
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: wais_relay_host
- TYPE: string
- DEFAULT: none
- LOC: Config.Wais.relayHost
- DOC_NONE
-
- NAME: wais_relay_port
- TYPE: ushort
- DEFAULT: 0
- LOC: Config.Wais.relayPort
- DOC_START
- Relay WAIS request to host (1st arg) at port (2 arg).
- DOC_END
-
-
- NAME: request_header_max_size
- COMMENT: (KB)
- TYPE: b_size_t
- DEFAULT: 10 KB
- LOC: Config.maxRequestHeaderSize
- DOC_START
- This specifies the maximum size for HTTP headers in a request.
- Request headers are usually relatively small (about 512 bytes).
- Placing a limit on the request header size will catch certain
- bugs (for example with persistent connections) and possibly
- buffer-overflow or denial-of-service attacks.
- DOC_END
-
- NAME: request_body_max_size
- COMMENT: (KB)
- TYPE: b_size_t
- DEFAULT: 0 KB
- LOC: Config.maxRequestBodySize
- DOC_START
- This specifies the maximum size for an HTTP request body.
- In other words, the maximum size of a PUT/POST request.
- A user who attempts to send a request with a body larger
- than this limit receives an "Invalid Request" error message.
- If you set this parameter to a zero (the default), there will
- be no limit imposed.
- DOC_END
-
- NAME: refresh_pattern
- TYPE: refreshpattern
- LOC: Config.Refresh
- DEFAULT: none
- DOC_START
- usage: refresh_pattern [-i] regex min percent max [options]
-
- By default, regular expressions are CASE-SENSITIVE. To make
- them case-insensitive, use the -i option.
-
- 'Min' is the time (in minutes) an object without an explicit
- expiry time should be considered fresh. The recommended
- value is 0, any higher values may cause dynamic applications
- to be erroneously cached unless the application designer
- has taken the appropriate actions.
-
- 'Percent' is a percentage of the objects age (time since last
- modification age) an object without explicit expiry time
- will be considered fresh.
-
- 'Max' is an upper limit on how long objects without an explicit
- expiry time will be considered fresh.
-
- options: override-expire
- override-lastmod
- reload-into-ims
- ignore-reload
-
- override-expire enforces min age even if the server
- sent a Expires: header. Doing this VIOLATES the HTTP
- standard. Enabling this feature could make you liable
- for problems which it causes.
-
- override-lastmod enforces min age even on objects
- that was modified recently.
-
- reload-into-ims changes client no-cache or ``reload''
- to If-Modified-Since requests. Doing this VIOLATES the
- HTTP standard. Enabling this feature could make you
- liable for problems which it causes.
-
- ignore-reload ignores a client no-cache or ``reload''
- header. Doing this VIOLATES the HTTP standard. Enabling
- this feature could make you liable for problems which
- it causes.
-
- Basically a cached object is:
-
- FRESH if expires < now, else STALE
- STALE if age > max
- FRESH if lm-factor < percent, else STALE
- FRESH if age < min
- else STALE
-
- The refresh_pattern lines are checked in the order listed here.
- The first entry which matches is used. If none of the entries
- match, then the default will be used.
-
- Note, you must uncomment all the default lines if you want
- to change one. The default setting is only active if none is
- used.
-
- Suggested default:
- NOCOMMENT_START
- refresh_pattern ^ftp: 1440 20% 10080
- refresh_pattern ^gopher: 1440 0% 1440
- refresh_pattern . 0 20% 4320
- NOCOMMENT_END
- DOC_END
-
- NAME: quick_abort_min
- COMMENT: (KB)
- TYPE: kb_size_t
- DEFAULT: 16 KB
- LOC: Config.quickAbort.min
- DOC_NONE
-
- NAME: quick_abort_max
- COMMENT: (KB)
- TYPE: kb_size_t
- DEFAULT: 16 KB
- LOC: Config.quickAbort.max
- DOC_NONE
-
- NAME: quick_abort_pct
- COMMENT: (percent)
- TYPE: int
- DEFAULT: 95
- LOC: Config.quickAbort.pct
- DOC_START
- The cache by default continues downloading aborted requests
- which are almost completed (less than 16 KB remaining). This
- may be undesirable on slow (e.g. SLIP) links and/or very busy
- caches. Impatient users may tie up file descriptors and
- bandwidth by repeatedly requesting and immediately aborting
- downloads.
-
- When the user aborts a request, Squid will check the
- quick_abort values to the amount of data transfered until
- then.
-
- If the transfer has less than 'quick_abort_min' KB remaining,
- it will finish the retrieval.
-
- If the transfer has more than 'quick_abort_max' KB remaining,
- it will abort the retrieval.
-
- If more than 'quick_abort_pct' of the transfer has completed,
- it will finish the retrieval.
-
- If you do not want any retrieval to continue after the client
- has aborted, set both 'quick_abort_min' and 'quick_abort_max'
- to '0 KB'.
-
- If you want retrievals to always continue if they are being
- cached then set 'quick_abort_min' to '-1 KB'.
- DOC_END
-
- NAME: read_ahead_gap
- COMMENT: buffer-size
- TYPE: kb_size_t
- LOC: Config.readAheadGap
- DEFAULT: 16 KB
- DOC_START
- The amount of data the cache will buffer ahead of what has been
- sent to the client when retrieving an object from another server.
- DOC_END
-
- NAME: negative_ttl
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.negativeTtl
- DEFAULT: 5 minutes
- DOC_START
- Time-to-Live (TTL) for failed requests. Certain types of
- failures (such as "connection refused" and "404 Not Found") are
- negatively-cached for a configurable amount of time. The
- default is 5 minutes. Note that this is different from
- negative caching of DNS lookups.
- DOC_END
-
-
- NAME: positive_dns_ttl
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.positiveDnsTtl
- DEFAULT: 6 hours
- DOC_START
- Time-to-Live (TTL) for positive caching of successful DNS lookups.
- Default is 6 hours (360 minutes). If you want to minimize the
- use of Squid's ipcache, set
- this to 1, not 0.
- DOC_END
-
-
- NAME: negative_dns_ttl
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.negativeDnsTtl
- DEFAULT: 5 minutes
- DOC_START
- Time-to-Live (TTL) for negative caching of failed DNS lookups.
- DOC_END
-
- NAME: range_offset_limit
- COMMENT: (bytes)
- TYPE: b_size_t
- LOC: Config.rangeOffsetLimit
- DEFAULT: 0 KB
- DOC_START
- Sets a upper limit on how far into the the file a Range request
- may be to cause Squid to prefetch the whole file. If beyond this
- limit then Squid forwards the Range request as it is and the result
- is NOT cached.
-
- This is to stop a far ahead range request (lets say start at 17MB)
- from making Squid fetch the whole object up to that point before
- sending anything to the client.
-
- A value of -1 causes Squid to always fetch the object from the
- beginning so that it may cache the result. (2.0 style)
-
- A value of 0 causes Squid to never fetch more than the
- client requested. (default)
- DOC_END
-
-
- COMMENT_START
- TIMEOUTS
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: connect_timeout
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.Timeout.connect
- DEFAULT: 2 minutes
- DOC_START
- Some systems (notably Linux) can not be relied upon to properly
- time out connect(2) requests. Therefore the Squid process
- enforces its own timeout on server connections. This parameter
- specifies how long to wait for the connect to complete. The
- default is two minutes (120 seconds).
- DOC_END
-
- NAME: peer_connect_timeout
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.Timeout.peer_connect
- DEFAULT: 30 seconds
- DOC_START
- This parameter specifies how long to wait for a pending TCP
- connection to a peer cache. The default is 30 seconds. You
- may also set
- different timeout values for individual neighbors
- with the 'connect-timeout' option on a 'cache_peer' line.
- DOC_END
-
- NAME: read_timeout
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.Timeout.read
- DEFAULT: 15 minutes
- DOC_START
- The read_timeout is applied on server-side connections. After
- each successful read(), the timeout will be extended by this
- amount. If no data is read again after this amount of time,
- the request is aborted and logged with ERR_READ_TIMEOUT. The
- default is 15 minutes.
- DOC_END
-
-
- NAME: request_timeout
- TYPE: time_t
- LOC: Config.Timeout.request
- DEFAULT: 5 minutes
- DOC_START
- How long to wait for an HTTP request after initial
- connection establishment.
- DOC_END
-
-
- NAME: persistent_request_timeout
- TYPE: time_t
- LOC: Config.Timeout.persistent_request
- DEFAULT: 1 minute
- DOC_START
- How long to wait for the next HTTP request on a persistent
- connection after the previous request completes.
- DOC_END
-
-
- NAME: client_lifetime
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.Timeout.lifetime
- DEFAULT: 1 day
- DOC_START
- The maximum amount of time that a client (browser) is allowed to
- remain connected to the cache process. This protects the Cache
- from having a lot of sockets (and hence file descriptors) tied up
- in a CLOSE_WAIT state from remote clients that go away without
- properly shutting down (either because of a network failure or
- because of a poor client implementation). The default is one
- day, 1440 minutes.
-
- NOTE: The default value is intended to be much larger than any
- client would ever need to be connected to your cache. You
- should probably change client_lifetime only as a last resort.
- If you seem to have many client connections tying up
- filedescriptors, we recommend first tuning the read_timeout,
- request_timeout, persistent_request_timeout and quick_abort values.
- DOC_END
-
- NAME: half_closed_clients
- TYPE: onoff
- LOC: Config.onoff.half_closed_clients
- DEFAULT: on
- DOC_START
- Some clients may shutdown the sending side of their TCP
- connections, while leaving their receiving sides open. Sometimes,
- Squid can not tell the difference between a half-closed and a
- fully-closed TCP connection. By default, half-closed client
- connections are kept open until a read(2) or write(2) on the
- socket returns an error. Change this option to 'off' and Squid
- will immediately close client connections when read(2) returns
- "no more data to read."
- DOC_END
-
- NAME: pconn_timeout
- TYPE: time_t
- LOC: Config.Timeout.pconn
- DEFAULT: 120 seconds
- DOC_START
- Timeout for idle persistent connections to servers and other
- proxies.
- DOC_END
-
- NAME: ident_timeout
- TYPE: time_t
- IFDEF: USE_IDENT
- LOC: Config.Timeout.ident
- DEFAULT: 10 seconds
- DOC_START
- Maximum time to wait for IDENT lookups to complete.
-
- If this is too high, and you enabled IDENT lookups from untrusted
- users, then you might be susceptible to denial-of-service by having
- many ident requests going at once.
- DOC_END
-
-
- NAME: shutdown_lifetime
- COMMENT: time-units
- TYPE: time_t
- LOC: Config.shutdownLifetime
- DEFAULT: 30 seconds
- DOC_START
- When SIGTERM or SIGHUP is received, the cache is put into
- "shutdown pending" mode until all active sockets are closed.
- This value is the lifetime to set
- for all open descriptors
- during shutdown mode. Any active clients after this many
- seconds will receive a 'timeout' message.
- DOC_END
-
- COMMENT_START
- ACCESS CONTROLS
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: acl
- TYPE: acl
- LOC: Config.aclList
- DEFAULT: none
- DOC_START
- Defining an Access List
-
- acl aclname acltype string1 ...
- acl aclname acltype "file" ...
-
- when using "file", the file should contain one item per line
-
- acltype is one of the types described below
-
- By default, regular expressions are CASE-SENSITIVE. To make
- them case-insensitive, use the -i option.
-
- acl aclname src ip-address/netmask ... (clients IP address)
- acl aclname src addr1-addr2/netmask ... (range of addresses)
- acl aclname dst ip-address/netmask ... (URL host's IP address)
- acl aclname myip ip-address/netmask ... (local socket IP address)
-
- acl aclname srcdomain .foo.com ... # reverse lookup, client IP
- acl aclname dstdomain .foo.com ... # Destination server from URL
- acl aclname srcdom_regex [-i] xxx ... # regex matching client name
- acl aclname dstdom_regex [-i] xxx ... # regex matching server
-# For dstdomain and dstdom_regex a reverse lookup is tried if a IP
-# based URL is used. The name "none" is used if the reverse lookup
-# fails.
-
- acl aclname time [day-abbrevs] [h1:m1-h2:m2]
- day-abbrevs:
- S - Sunday
- M - Monday
- T - Tuesday
- W - Wednesday
- H - Thursday
- F - Friday
- A - Saturday
- h1:m1 must be less than h2:m2
- acl aclname url_regex [-i] ^http:// ... # regex matching on whole URL
- acl aclname urlpath_regex [-i] \.gif$ ... # regex matching on URL path
- acl aclname port 80 70 21 ...
- acl aclname port 0-1024 ... # ranges allowed
- acl aclname myport 3128 ... # (local socket TCP port)
- acl aclname proto HTTP FTP ...
- acl aclname method GET POST ...
- acl aclname browser [-i] regexp ...
-# pattern match on User-Agent header
- acl aclname referer_regex [-i] regexp ...
-# pattern match on Referer header
-# Referer is highly unreliable, so use with care
- acl aclname ident username ...
- acl aclname ident_regex [-i] pattern ...
-# string match on ident output.
-# use REQUIRED to accept any non-null ident.
- acl aclname src_as number ...
- acl aclname dst_as number ...
-# Except for access control, AS numbers can be used for
-# routing of requests to specific caches. Here's an
-# example for routing all requests for AS#1241 and only
+auth_param basic children 5
+auth_param basic realm Squid proxy-caching web server
+auth_param basic credentialsttl 2 hours
+NOCOMMENT_END
+DOC_END
+
+NAME: authenticate_cache_garbage_interval
+TYPE: time_t
+DEFAULT: 1 hour
+LOC: Config.authenticateGCInterval
+DOC_START
+ The time period between garbage collection across the
+ username cache. This is a tradeoff between memory utilisation
+ (long intervals - say 2 days) and CPU (short intervals -
+ say 1 minute). Only change if you have good reason to.
+DOC_END
+
+NAME: authenticate_ttl
+TYPE: time_t
+DEFAULT: 1 hour
+LOC: Config.authenticateTTL
+DOC_START
+ The time a user & their credentials stay in the logged in
+ user cache since their last request. When the garbage
+ interval passes, all user credentials that have passed their
+ TTL are removed from memory.
+DOC_END
+
+NAME: authenticate_ip_ttl
+TYPE: time_t
+LOC: Config.authenticateIpTTL
+DEFAULT: 0 seconds
+DOC_START
+ If you use proxy authentication and the 'max_user_ip' ACL,
+ this directive controls how long Squid remembers the IP
+ addresses associated with each user. Use a small value
+ (e.g., 60 seconds) if your users might change addresses
+ quickly, as is the case with dialups. You might be safe
+ using a larger value (e.g., 2 hours) in a corporate LAN
+ environment with relatively static address assignments.
+DOC_END
+
+NAME: external_acl_type
+TYPE: externalAclHelper
+LOC: Config.externalAclHelperList
+DEFAULT: none
+DOC_START
+ This option defines external acl classes using a helper program
+ to look up the status
+
+ external_acl_type name [options] FORMAT.. /path/to/helper [helper arguments..]
+
+ Options:
+
+ ttl=n TTL in seconds for cached results (defaults to 3600
+ for 1 hour)
+ negative_ttl=n
+ TTL for cached negative lookups (default same
+ as ttl)
+ children=n Number of acl helper processes spawn to service
+ external acl lookups of this type.
+ cache=n result cache size, 0 is unbounded (default)
+
+ FORMAT specifications
+
+ %LOGIN Authenticated user login name
+ %IDENT Ident user name
+ %SRC Client IP
+ %DST Requested host
+ %PROTO Requested protocol
+ %PORT Requested port
+ %PATH Requested URL path
+ %METHOD Request method
+ %USER_CERT_xx SSL User certificate attribute xx
+ %USER_CA_xx SSL User certificate CA attribute xx
+ %{Header} HTTP request header
+ %{Hdr:member} HTTP request header list member
+ %{Hdr:;member}
+ HTTP request header list member using ; as
+ list separator. ; can be any non-alphanumeric
+ character.
+
+ In addition, any string specified in the referencing acl will
+ also be included in the helper request line, after the specified
+ formats (see the "acl external" directive)
+
+ The helper receives lines per the above format specification,
+ and returns lines starting with OK or ERR indicating the validity
+ of the request and optionally followed by additional keywords with
+ more details.
+
+ General result syntax:
+
+ OK/ERR keyword=value ...
+
+ Defined keywords:
+
+ user= The users name (login)
+ error= Error description (only defined for ERR results)
+
+ Keyword values need to be enclosed in quotes if they may
+ contain whitespace, or the whitespace escaped using \. Any
+ quotes or \ characters within the keyword value must be \
+ escaped.
+DOC_END
+
+COMMENT_START
+ OPTIONS FOR TUNING THE CACHE
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: wais_relay_host
+TYPE: string
+DEFAULT: none
+LOC: Config.Wais.relayHost
+DOC_NONE
+
+NAME: wais_relay_port
+TYPE: ushort
+DEFAULT: 0
+LOC: Config.Wais.relayPort
+DOC_START
+ Relay WAIS request to host (1st arg) at port (2 arg).
+DOC_END
+
+
+NAME: request_header_max_size
+COMMENT: (KB)
+TYPE: b_size_t
+DEFAULT: 10 KB
+LOC: Config.maxRequestHeaderSize
+DOC_START
+ This specifies the maximum size for HTTP headers in a request.
+ Request headers are usually relatively small (about 512 bytes).
+ Placing a limit on the request header size will catch certain
+ bugs (for example with persistent connections) and possibly
+ buffer-overflow or denial-of-service attacks.
+DOC_END
+
+NAME: request_body_max_size
+COMMENT: (KB)
+TYPE: b_size_t
+DEFAULT: 0 KB
+LOC: Config.maxRequestBodySize
+DOC_START
+ This specifies the maximum size for an HTTP request body.
+ In other words, the maximum size of a PUT/POST request.
+ A user who attempts to send a request with a body larger
+ than this limit receives an "Invalid Request" error message.
+ If you set this parameter to a zero (the default), there will
+ be no limit imposed.
+DOC_END
+
+NAME: refresh_pattern
+TYPE: refreshpattern
+LOC: Config.Refresh
+DEFAULT: none
+DOC_START
+ usage: refresh_pattern [-i] regex min percent max [options]
+
+ By default, regular expressions are CASE-SENSITIVE. To make
+ them case-insensitive, use the -i option.
+
+ 'Min' is the time (in minutes) an object without an explicit
+ expiry time should be considered fresh. The recommended
+ value is 0, any higher values may cause dynamic applications
+ to be erroneously cached unless the application designer
+ has taken the appropriate actions.
+
+ 'Percent' is a percentage of the objects age (time since last
+ modification age) an object without explicit expiry time
+ will be considered fresh.
+
+ 'Max' is an upper limit on how long objects without an explicit
+ expiry time will be considered fresh.
+
+ options: override-expire
+ override-lastmod
+ reload-into-ims
+ ignore-reload
+
+ override-expire enforces min age even if the server
+ sent a Expires: header. Doing this VIOLATES the HTTP
+ standard. Enabling this feature could make you liable
+ for problems which it causes.
+
+ override-lastmod enforces min age even on objects
+ that was modified recently.
+
+ reload-into-ims changes client no-cache or ``reload''
+ to If-Modified-Since requests. Doing this VIOLATES the
+ HTTP standard. Enabling this feature could make you
+ liable for problems which it causes.
+
+ ignore-reload ignores a client no-cache or ``reload''
+ header. Doing this VIOLATES the HTTP standard. Enabling
+ this feature could make you liable for problems which
+ it causes.
+
+ Basically a cached object is:
+
+ FRESH if expires < now, else STALE
+ STALE if age > max
+ FRESH if lm-factor < percent, else STALE
+ FRESH if age < min
+ else STALE
+
+ The refresh_pattern lines are checked in the order listed here.
+ The first entry which matches is used. If none of the entries
+ match, then the default will be used.
+
+ Note, you must uncomment all the default lines if you want
+ to change one. The default setting is only active if none is
+ used.
+
+Suggested default:
+NOCOMMENT_START
+refresh_pattern ^ftp: 1440 20% 10080
+refresh_pattern ^gopher: 1440 0% 1440
+refresh_pattern . 0 20% 4320
+NOCOMMENT_END
+DOC_END
+
+NAME: quick_abort_min
+COMMENT: (KB)
+TYPE: kb_size_t
+DEFAULT: 16 KB
+LOC: Config.quickAbort.min
+DOC_NONE
+
+NAME: quick_abort_max
+COMMENT: (KB)
+TYPE: kb_size_t
+DEFAULT: 16 KB
+LOC: Config.quickAbort.max
+DOC_NONE
+
+NAME: quick_abort_pct
+COMMENT: (percent)
+TYPE: int
+DEFAULT: 95
+LOC: Config.quickAbort.pct
+DOC_START
+ The cache by default continues downloading aborted requests
+ which are almost completed (less than 16 KB remaining). This
+ may be undesirable on slow (e.g. SLIP) links and/or very busy
+ caches. Impatient users may tie up file descriptors and
+ bandwidth by repeatedly requesting and immediately aborting
+ downloads.
+
+ When the user aborts a request, Squid will check the
+ quick_abort values to the amount of data transfered until
+ then.
+
+ If the transfer has less than 'quick_abort_min' KB remaining,
+ it will finish the retrieval.
+
+ If the transfer has more than 'quick_abort_max' KB remaining,
+ it will abort the retrieval.
+
+ If more than 'quick_abort_pct' of the transfer has completed,
+ it will finish the retrieval.
+
+ If you do not want any retrieval to continue after the client
+ has aborted, set both 'quick_abort_min' and 'quick_abort_max'
+ to '0 KB'.
+
+ If you want retrievals to always continue if they are being
+ cached then set 'quick_abort_min' to '-1 KB'.
+DOC_END
+
+NAME: read_ahead_gap
+COMMENT: buffer-size
+TYPE: kb_size_t
+LOC: Config.readAheadGap
+DEFAULT: 16 KB
+DOC_START
+ The amount of data the cache will buffer ahead of what has been
+ sent to the client when retrieving an object from another server.
+DOC_END
+
+NAME: negative_ttl
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.negativeTtl
+DEFAULT: 5 minutes
+DOC_START
+ Time-to-Live (TTL) for failed requests. Certain types of
+ failures (such as "connection refused" and "404 Not Found") are
+ negatively-cached for a configurable amount of time. The
+ default is 5 minutes. Note that this is different from
+ negative caching of DNS lookups.
+DOC_END
+
+
+NAME: positive_dns_ttl
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.positiveDnsTtl
+DEFAULT: 6 hours
+DOC_START
+ Time-to-Live (TTL) for positive caching of successful DNS lookups.
+ Default is 6 hours (360 minutes). If you want to minimize the
+ use of Squid's ipcache, set this to 1, not 0.
+DOC_END
+
+
+NAME: negative_dns_ttl
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.negativeDnsTtl
+DEFAULT: 5 minutes
+DOC_START
+ Time-to-Live (TTL) for negative caching of failed DNS lookups.
+DOC_END
+
+NAME: range_offset_limit
+COMMENT: (bytes)
+TYPE: b_size_t
+LOC: Config.rangeOffsetLimit
+DEFAULT: 0 KB
+DOC_START
+ Sets a upper limit on how far into the the file a Range request
+ may be to cause Squid to prefetch the whole file. If beyond this
+ limit then Squid forwards the Range request as it is and the result
+ is NOT cached.
+
+ This is to stop a far ahead range request (lets say start at 17MB)
+ from making Squid fetch the whole object up to that point before
+ sending anything to the client.
+
+ A value of -1 causes Squid to always fetch the object from the
+ beginning so that it may cache the result. (2.0 style)
+
+ A value of 0 causes Squid to never fetch more than the
+ client requested. (default)
+DOC_END
+
+
+COMMENT_START
+ TIMEOUTS
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: connect_timeout
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.Timeout.connect
+DEFAULT: 2 minutes
+DOC_START
+ Some systems (notably Linux) can not be relied upon to properly
+ time out connect(2) requests. Therefore the Squid process
+ enforces its own timeout on server connections. This parameter
+ specifies how long to wait for the connect to complete. The
+ default is two minutes (120 seconds).
+DOC_END
+
+NAME: peer_connect_timeout
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.Timeout.peer_connect
+DEFAULT: 30 seconds
+DOC_START
+ This parameter specifies how long to wait for a pending TCP
+ connection to a peer cache. The default is 30 seconds. You
+ may also set different timeout values for individual neighbors
+ with the 'connect-timeout' option on a 'cache_peer' line.
+DOC_END
+
+NAME: read_timeout
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.Timeout.read
+DEFAULT: 15 minutes
+DOC_START
+ The read_timeout is applied on server-side connections. After
+ each successful read(), the timeout will be extended by this
+ amount. If no data is read again after this amount of time,
+ the request is aborted and logged with ERR_READ_TIMEOUT. The
+ default is 15 minutes.
+DOC_END
+
+
+NAME: request_timeout
+TYPE: time_t
+LOC: Config.Timeout.request
+DEFAULT: 5 minutes
+DOC_START
+ How long to wait for an HTTP request after initial
+ connection establishment.
+DOC_END
+
+
+NAME: persistent_request_timeout
+TYPE: time_t
+LOC: Config.Timeout.persistent_request
+DEFAULT: 1 minute
+DOC_START
+ How long to wait for the next HTTP request on a persistent
+ connection after the previous request completes.
+DOC_END
+
+
+NAME: client_lifetime
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.Timeout.lifetime
+DEFAULT: 1 day
+DOC_START
+ The maximum amount of time that a client (browser) is allowed to
+ remain connected to the cache process. This protects the Cache
+ from having a lot of sockets (and hence file descriptors) tied up
+ in a CLOSE_WAIT state from remote clients that go away without
+ properly shutting down (either because of a network failure or
+ because of a poor client implementation). The default is one
+ day, 1440 minutes.
+
+ NOTE: The default value is intended to be much larger than any
+ client would ever need to be connected to your cache. You
+ should probably change client_lifetime only as a last resort.
+ If you seem to have many client connections tying up
+ filedescriptors, we recommend first tuning the read_timeout,
+ request_timeout, persistent_request_timeout and quick_abort values.
+DOC_END
+
+NAME: half_closed_clients
+TYPE: onoff
+LOC: Config.onoff.half_closed_clients
+DEFAULT: on
+DOC_START
+ Some clients may shutdown the sending side of their TCP
+ connections, while leaving their receiving sides open. Sometimes,
+ Squid can not tell the difference between a half-closed and a
+ fully-closed TCP connection. By default, half-closed client
+ connections are kept open until a read(2) or write(2) on the
+ socket returns an error. Change this option to 'off' and Squid
+ will immediately close client connections when read(2) returns
+ "no more data to read."
+DOC_END
+
+NAME: pconn_timeout
+TYPE: time_t
+LOC: Config.Timeout.pconn
+DEFAULT: 120 seconds
+DOC_START
+ Timeout for idle persistent connections to servers and other
+ proxies.
+DOC_END
+
+NAME: ident_timeout
+TYPE: time_t
+IFDEF: USE_IDENT
+LOC: Config.Timeout.ident
+DEFAULT: 10 seconds
+DOC_START
+ Maximum time to wait for IDENT lookups to complete.
+
+ If this is too high, and you enabled IDENT lookups from untrusted
+ users, then you might be susceptible to denial-of-service by having
+ many ident requests going at once.
+DOC_END
+
+
+NAME: shutdown_lifetime
+COMMENT: time-units
+TYPE: time_t
+LOC: Config.shutdownLifetime
+DEFAULT: 30 seconds
+DOC_START
+ When SIGTERM or SIGHUP is received, the cache is put into
+ "shutdown pending" mode until all active sockets are closed.
+ This value is the lifetime to set for all open descriptors
+ during shutdown mode. Any active clients after this many
+ seconds will receive a 'timeout' message.
+DOC_END
+
+COMMENT_START
+ ACCESS CONTROLS
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: acl
+TYPE: acl
+LOC: Config.aclList
+DEFAULT: none
+DOC_START
+ Defining an Access List
+
+ acl aclname acltype string1 ...
+ acl aclname acltype "file" ...
+
+ when using "file", the file should contain one item per line
+
+ acltype is one of the types described below
+
+ By default, regular expressions are CASE-SENSITIVE. To make
+ them case-insensitive, use the -i option.
+
+ acl aclname src ip-address/netmask ... (clients IP address)
+ acl aclname src addr1-addr2/netmask ... (range of addresses)
+ acl aclname dst ip-address/netmask ... (URL host's IP address)
+ acl aclname myip ip-address/netmask ... (local socket IP address)
+
+ acl aclname srcdomain .foo.com ... # reverse lookup, client IP
+ acl aclname dstdomain .foo.com ... # Destination server from URL
+ acl aclname srcdom_regex [-i] xxx ... # regex matching client name
+ acl aclname dstdom_regex [-i] xxx ... # regex matching server
+ # For dstdomain and dstdom_regex a reverse lookup is tried if a IP
+ # based URL is used. The name "none" is used if the reverse lookup
+ # fails.
+
+ acl aclname time [day-abbrevs] [h1:m1-h2:m2]
+ day-abbrevs:
+ S - Sunday
+ M - Monday
+ T - Tuesday
+ W - Wednesday
+ H - Thursday
+ F - Friday
+ A - Saturday
+ h1:m1 must be less than h2:m2
+ acl aclname url_regex [-i] ^http:// ... # regex matching on whole URL
+ acl aclname urlpath_regex [-i] \.gif$ ... # regex matching on URL path
+ acl aclname port 80 70 21 ...
+ acl aclname port 0-1024 ... # ranges allowed
+ acl aclname myport 3128 ... # (local socket TCP port)
+ acl aclname proto HTTP FTP ...
+ acl aclname method GET POST ...
+ acl aclname browser [-i] regexp ...
+ # pattern match on User-Agent header
+ acl aclname referer_regex [-i] regexp ...
+ # pattern match on Referer header
+ # Referer is highly unreliable, so use with care
+ acl aclname ident username ...
+ acl aclname ident_regex [-i] pattern ...
+ # string match on ident output.
+ # use REQUIRED to accept any non-null ident.
+ acl aclname src_as number ...
+ acl aclname dst_as number ...
+ # Except for access control, AS numbers can be used for
+ # routing of requests to specific caches. Here's an
+ # example for routing all requests for AS#1241 and only
# those to mycache.mydomain.net:
# acl asexample dst_as 1241
# cache_peer_access mycache.mydomain.net allow asexample
# cache_peer_access mycache_mydomain.net deny all
- acl aclname proxy_auth [-i] username ...
- acl aclname proxy_auth_regex [-i] pattern ...
-# list of valid usernames
+ acl aclname proxy_auth [-i] username ...
+ acl aclname proxy_auth_regex [-i] pattern ...
+ # list of valid usernames
# use REQUIRED to accept any valid username.
#
# NOTE: when a Proxy-Authentication header is sent but it is not
# the browser needs to be configured for using a proxy in order
# to respond to proxy authentication.
- acl aclname snmp_community string ...
-# A community string to limit access to your SNMP Agent
+ acl aclname snmp_community string ...
+ # A community string to limit access to your SNMP Agent
# Example:
#
# acl snmppublic snmp_community public
- acl aclname maxconn number
-# This will be matched when the client's IP address has
+ acl aclname maxconn number
+ # This will be matched when the client's IP address has
# more than <number> HTTP connections established.
- acl aclname max_user_ip [-s] number
-# This will be matched when the user attempts to log in from more
+ acl aclname max_user_ip [-s] number
+ # This will be matched when the user attempts to log in from more
# than <number> different ip addresses. The authenticate_ip_ttl
# parameter controls the timeout on the ip entries.
# If -s is specified then the limit is strict, denying browsing
# clients may appear to come from multiple addresses if they are
# going through proxy farms, so a limit of 1 may cause user problems.
- acl aclname req_mime_type mime-type1 ...
-# regex match agains the mime type of the request generated
+ acl aclname req_mime_type mime-type1 ...
+ # regex match agains the mime type of the request generated
# by the client. Can be used to detect file upload or some
# types HTTP tunelling requests.
# NOTE: This does NOT match the reply. You cannot use this
# to match the returned file type.
- acl aclname rep_mime_type mime-type1 ...
-# regex match against the mime type of the reply recieved by
+ acl aclname rep_mime_type mime-type1 ...
+ # regex match against the mime type of the reply recieved by
# squid. Can be used to detect file download or some
# types HTTP tunelling requests.
# NOTE: This has no effect in http_access rules. It only has
# effect in rules that affect the reply data stream such as
# http_reply_access.
- acl acl_name external class_name [arguments...]
-# external ACL lookup via a helper class defined by the
+ acl acl_name external class_name [arguments...]
+ # external ACL lookup via a helper class defined by the
# external_acl_type directive.
- acl aclname user_cert attribute values...
-# match against attributes in a user SSL certificate
+ acl aclname user_cert attribute values...
+ # match against attributes in a user SSL certificate
# attribute is one of DN/C/O/CN/L/ST
- acl aclname ca_cert attribute values...
-# match against attributes a users issuing CA SSL certificate
+ acl aclname ca_cert attribute values...
+ # match against attributes a users issuing CA SSL certificate
# attribute is one of DN/C/O/CN/L/ST
- Examples:
- acl myexample dst_as 1241
- acl password proxy_auth REQUIRED
- acl fileupload req_mime_type -i ^multipart/form-data$
- acl javascript rep_mime_type -i ^application/x-javascript$
+Examples:
+acl myexample dst_as 1241
+acl password proxy_auth REQUIRED
+acl fileupload req_mime_type -i ^multipart/form-data$
+acl javascript rep_mime_type -i ^application/x-javascript$
- NOCOMMENT_START
+NOCOMMENT_START
#Recommended minimum configuration:
- acl all src 0.0.0.0/0.0.0.0
- acl manager proto cache_object
- acl localhost src 127.0.0.1/255.255.255.255
- acl to_localhost dst 127.0.0.0/8
- acl SSL_ports port 443 563
- acl Safe_ports port 80 # http
- acl Safe_ports port 21 # ftp
- acl Safe_ports port 443 563 # https, snews
- acl Safe_ports port 70 # gopher
- acl Safe_ports port 210 # wais
- acl Safe_ports port 1025-65535 # unregistered ports
- acl Safe_ports port 280 # http-mgmt
- acl Safe_ports port 488 # gss-http
- acl Safe_ports port 591 # filemaker
- acl Safe_ports port 777 # multiling http
- acl CONNECT method CONNECT
- NOCOMMENT_END
- DOC_END
-
- NAME: http_access
- TYPE: acl_access
- LOC: Config.accessList.http
- DEFAULT: none
- DEFAULT_IF_NONE: deny all
- DOC_START
- Allowing or Denying access based on defined access lists
-
- Access to the HTTP port:
- http_access allow|deny [!]aclname ...
-
- NOTE on default values:
-
- If there are no "access" lines present, the default is to deny
- the request.
-
- If none of the "access" lines cause a match, the default is the
- opposite of the last line in the list. If the last line was
- deny, then the default is allow. Conversely, if the last line
- is allow, the default will be deny. For these reasons, it is a
- good idea to have an "deny all" or "allow all" entry at the end
- of your access lists to avoid potential confusion.
-
- NOCOMMENT_START
+acl all src 0.0.0.0/0.0.0.0
+acl manager proto cache_object
+acl localhost src 127.0.0.1/255.255.255.255
+acl to_localhost dst 127.0.0.0/8
+acl SSL_ports port 443 563
+acl Safe_ports port 80 # http
+acl Safe_ports port 21 # ftp
+acl Safe_ports port 443 563 # https, snews
+acl Safe_ports port 70 # gopher
+acl Safe_ports port 210 # wais
+acl Safe_ports port 1025-65535 # unregistered ports
+acl Safe_ports port 280 # http-mgmt
+acl Safe_ports port 488 # gss-http
+acl Safe_ports port 591 # filemaker
+acl Safe_ports port 777 # multiling http
+acl CONNECT method CONNECT
+NOCOMMENT_END
+DOC_END
+
+NAME: http_access
+TYPE: acl_access
+LOC: Config.accessList.http
+DEFAULT: none
+DEFAULT_IF_NONE: deny all
+DOC_START
+ Allowing or Denying access based on defined access lists
+
+ Access to the HTTP port:
+ http_access allow|deny [!]aclname ...
+
+ NOTE on default values:
+
+ If there are no "access" lines present, the default is to deny
+ the request.
+
+ If none of the "access" lines cause a match, the default is the
+ opposite of the last line in the list. If the last line was
+ deny, then the default is allow. Conversely, if the last line
+ is allow, the default will be deny. For these reasons, it is a
+ good idea to have an "deny all" or "allow all" entry at the end
+ of your access lists to avoid potential confusion.
+
+NOCOMMENT_START
#Recommended minimum configuration:
#
# Only allow cachemgr access from localhost
- http_access allow manager localhost
- http_access deny manager
+http_access allow manager localhost
+http_access deny manager
# Deny requests to unknown ports
- http_access deny !Safe_ports
+http_access deny !Safe_ports
# Deny CONNECT to other than SSL ports
- http_access deny CONNECT !SSL_ports
+http_access deny CONNECT !SSL_ports
#
# We strongly recommend to uncomment the following to protect innocent
# web applications running on the proxy server who think that the only
#http_access allow our_networks
# And finally deny all other access to this proxy
- http_access deny all
- NOCOMMENT_END
- DOC_END
+http_access deny all
+NOCOMMENT_END
+DOC_END
- NAME: http_reply_access
- TYPE: acl_access
- LOC: Config.accessList.reply
- DEFAULT: none
- DEFAULT_IF_NONE: allow all
- DOC_START
- Allow replies to client requests. This is complementary to http_access.
+NAME: http_reply_access
+TYPE: acl_access
+LOC: Config.accessList.reply
+DEFAULT: none
+DEFAULT_IF_NONE: allow all
+DOC_START
+ Allow replies to client requests. This is complementary to http_access.
- http_reply_access allow|deny [!] aclname ...
+ http_reply_access allow|deny [!] aclname ...
- NOTE: if there are no access lines present, the default is to allow
- all replies
+ NOTE: if there are no access lines present, the default is to allow
+ all replies
- If none of the access lines cause a match, then the opposite of the
- last line will apply. Thus it is good practice to end the rules
- with an "allow all" or "deny all" entry.
+ If none of the access lines cause a match, then the opposite of the
+ last line will apply. Thus it is good practice to end the rules
+ with an "allow all" or "deny all" entry.
- NOCOMMENT_START
+NOCOMMENT_START
#Recommended minimum configuration:
#
# Insert your own rules here.
#
#
# and finally allow by default
- http_reply_access allow all
- NOCOMMENT_END
- DOC_END
+http_reply_access allow all
+NOCOMMENT_END
+DOC_END
- NAME: icp_access
- TYPE: acl_access
- LOC: Config.accessList.icp
- DEFAULT: none
- DEFAULT_IF_NONE: deny all
- DOC_START
- Allowing or Denying access to the ICP port based on defined
- access lists
+NAME: icp_access
+TYPE: acl_access
+LOC: Config.accessList.icp
+DEFAULT: none
+DEFAULT_IF_NONE: deny all
+DOC_START
+ Allowing or Denying access to the ICP port based on defined
+ access lists
- icp_access allow|deny [!]aclname ...
+ icp_access allow|deny [!]aclname ...
- See http_access for details
+ See http_access for details
- NOCOMMENT_START
+NOCOMMENT_START
#Allow ICP queries from everyone
- icp_access allow all
- NOCOMMENT_END
- DOC_END
+icp_access allow all
+NOCOMMENT_END
+DOC_END
- NAME: miss_access
- TYPE: acl_access
- LOC: Config.accessList.miss
- DEFAULT: none
- DOC_START
- Use to force your neighbors to use you as a sibling instead of
- a parent. For example:
+NAME: miss_access
+TYPE: acl_access
+LOC: Config.accessList.miss
+DEFAULT: none
+DOC_START
+ Use to force your neighbors to use you as a sibling instead of
+ a parent. For example:
- acl localclients src 172.16.0.0/16
- miss_access allow localclients
- miss_access deny !localclients
+ acl localclients src 172.16.0.0/16
+ miss_access allow localclients
+ miss_access deny !localclients
- This means that only your local clients are allowed to fetch
- MISSES and all other clients can only fetch HITS.
+ This means that only your local clients are allowed to fetch
+ MISSES and all other clients can only fetch HITS.
- By default, allow all clients who passed the http_access rules
- to fetch MISSES from us.
+ By default, allow all clients who passed the http_access rules
+ to fetch MISSES from us.
- NOCOMMENT_START
+NOCOMMENT_START
#Default setting:
# miss_access allow all
- NOCOMMENT_END
- DOC_END
-
-
- NAME: cache_peer_access
- TYPE: peer_access
- DEFAULT: none
- LOC: none
- DOC_START
- Similar to 'cache_peer_domain' but provides more flexibility by
- using ACL elements.
-
- cache_peer_access cache-host allow|deny [!]aclname ...
-
- The syntax is identical to 'http_access' and the other lists of
- ACL elements. See the comments for 'http_access' below, or
- the Squid FAQ (http://www.squid-cache.org/FAQ/FAQ-10.html).
- DOC_END
-
- NAME: ident_lookup_access
- TYPE: acl_access
- IFDEF: USE_IDENT
- DEFAULT: none
- DEFAULT_IF_NONE: deny all
- LOC: Config.accessList.identLookup
- DOC_START
- A list of ACL elements which, if matched, cause an ident
- (RFC 931) lookup to be performed for this request. For
- example, you might choose to always perform ident lookups
- for your main multi-user Unix boxes, but not for your Macs
- and PCs. By default, ident lookups are not performed for
- any requests.
-
- To enable ident lookups for specific client addresses, you
- can follow this example:
-
- acl ident_aware_hosts src 198.168.1.0/255.255.255.0
- ident_lookup_access allow ident_aware_hosts
- ident_lookup_access deny all
-
- Only src type ACL checks are fully supported. A src_domain
- ACL might work at times, but it will not always provide
- the correct result.
- DOC_END
-
- NAME: tcp_outgoing_tos tcp_outgoing_ds tcp_outgoing_dscp
- TYPE: acl_tos
- DEFAULT: none
- LOC: Config.accessList.outgoing_tos
- DOC_START
- Allows you to select a TOS/Diffserv value to mark outgoing
- connections with, based on the username or source address
- making the request.
-
- tcp_outgoing_tos ds-field [!]aclname ...
-
- Example where normal_service_net uses the TOS value 0x00
- and normal_service_net uses 0x20
-
- acl normal_service_net src 10.0.0.0/255.255.255.0
- acl good_service_net src 10.0.1.0/255.255.255.0
- tcp_outgoing_tos 0x00 normal_service_net 0x00
- tcp_outgoing_tos 0x20 good_service_net
-
- TOS/DSCP values really only have local significance - so you should
- know what you're specifying. For more, see RFC 2474
-
- The TOS/DSCP byte must be exactly that - a byte, value 0 - 255, or
- "default" to use whatever default your host has.
-
- Processing proceeds in the order specified, and stops at first fully
- matching line.
- DOC_END
-
- NAME: tcp_outgoing_address
- TYPE: acl_address
- DEFAULT: none
- LOC: Config.accessList.outgoing_address
- DOC_START
- Allows you to map requests to different outgoing IP addresses
- based on the username or sourceaddress of the user making
- the request.
-
- tcp_outgoing_address ipaddr [[!]aclname] ...
-
- Example where requests from 10.0.0.0/24 will be forwareded
- with source address 10.1.0.1, 10.0.2.0/24 forwarded with
- source address 10.1.0.2 and the rest will be forwarded with
- source address 10.1.0.3.
-
- acl normal_service_net src 10.0.0.0/255.255.255.0
- acl good_service_net src 10.0.1.0/255.255.255.0
- tcp_outgoing_address 10.0.0.1 normal_service_net
- tcp_outgoing_address 10.0.0.2 good_service_net
- tcp_outgoing_address 10.0.0.3
-
- Processing proceeds in the order specified, and stops at first fully
- matching line.
- DOC_END
-
- NAME: reply_body_max_size
- COMMENT: size [acl acl...]
- TYPE: acl_b_size_t
- DEFAULT: none
- LOC: Config.ReplyBodySize
- DOC_START
- This option specifies the maximum size of a reply body. It can be
- used to prevent users from downloading very large files, such as
- MP3's and movies. When the reply headers are recieved, the
- reply_body_max_size lines are processed, and the first line where
- all (if any) listed acls are true is used as the maximum body size
- for this reply.
-
- This size is then checked twice. First when we get
- the reply headers,
- we check the content-length value. If the content length value exists
- and is larger than the allowed size, the request is denied and the
- user receives an error message that says "the request or reply
- is too large." If there is no content-length, and the reply
- size exceeds this limit, the client's connection is just closed
- and they will receive a partial reply.
-
- WARNING: downstream caches probably can not detect a partial reply
- if there is no content-length header, so they will cache
- partial responses and give them out as hits. You should NOT
- use this option if you have downstream caches.
-
- WARNING: A maximum size smaller than the size of squid's error messages
- will cause an infinite loop and crash squid. Ensure that the smallest
- non-zero value you use is greater that the maximum header size plus
- the size of your largest error page.
-
- If you set
- this parameter none (the default), there will be
- no limit imposed.
- DOC_END
-
- COMMENT_START
- ADMINISTRATIVE PARAMETERS
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: cache_mgr
- TYPE: string
- DEFAULT: webmaster
- LOC: Config.adminEmail
- DOC_START
- Email-address of local cache manager who will receive
- mail if the cache dies. The default is "webmaster."
- DOC_END
-
-
- NAME: cache_effective_user
- TYPE: string
- DEFAULT: nobody
- LOC: Config.effectiveUser
- DOC_NONE
-
- NAME: cache_effective_group
- TYPE: string
- DEFAULT: none
- LOC: Config.effectiveGroup
- DOC_START
-
- If you start Squid as root, it will change its effective/real
- UID/GID to the UID/GID specified below. The default is to
- change to UID to nobody. If you define cache_effective_user,
- but not cache_effective_group, Squid sets the GID the
- effective user's default group ID (taken from the password
- file).
-
- If Squid is not started as root, the cache_effective_user
- value is ignored and the GID value is unchanged by default.
- However, you can make Squid change its GID to another group
- that the process owner is a member of. Note that if Squid
- is not started as root then you cannot set http_port to a
- value lower than 1024.
- DOC_END
-
-
- NAME: visible_hostname
- TYPE: string
- LOC: Config.visibleHostname
- DEFAULT: none
- DOC_START
- If you want to present a special hostname in error messages, etc,
- then define this. Otherwise, the return value of gethostname()
- will be used. If you have multiple caches in a cluster and
- get errors about IP-forwarding you must set them to have individual
- names with this setting.
- DOC_END
-
-
- NAME: unique_hostname
- TYPE: string
- LOC: Config.uniqueHostname
- DEFAULT: none
- DOC_START
- If you want to have multiple machines with the same
- 'visible_hostname' then you must give each machine a different
- 'unique_hostname' so that forwarding loops can be detected.
- DOC_END
-
-
- NAME: hostname_aliases
- TYPE: wordlist
- LOC: Config.hostnameAliases
- DEFAULT: none
- DOC_START
- A list of other DNS names that your cache has.
- DOC_END
-
- COMMENT_START
- OPTIONS FOR THE CACHE REGISTRATION SERVICE
- -----------------------------------------------------------------------------
-
- This section contains parameters for the (optional) cache
- announcement service. This service is provided to help
- cache administrators locate one another in order to join or
- create cache hierarchies.
-
- An 'announcement' message is sent (via UDP) to the registration
- service by Squid. By default, the announcement message is NOT
- SENT unless you enable it with 'announce_period' below.
-
- The announcement message includes your hostname, plus the
- following information from this configuration file:
-
- http_port
- icp_port
- cache_mgr
-
- All current information is processed regularly and made
- available on the Web at http://www.ircache.net/Cache/Tracker/.
- COMMENT_END
-
- NAME: announce_period
- TYPE: time_t
- LOC: Config.Announce.period
- DEFAULT: 0
- DOC_START
- This is how frequently to send cache announcements. The
- default is `0' which disables sending the announcement
- messages.
-
- To enable announcing your cache, just uncomment the line
- below.
-
- NOCOMMENT_START
-#To enable announcing your cache, just uncomment the line below.
-#announce_period 1 day
- NOCOMMENT_END
- DOC_END
-
-
- NAME: announce_host
- TYPE: string
- DEFAULT: tracker.ircache.net
- LOC: Config.Announce.host
- DOC_NONE
-
- NAME: announce_file
- TYPE: string
- DEFAULT: none
- LOC: Config.Announce.file
- DOC_NONE
-
- NAME: announce_port
- TYPE: ushort
- DEFAULT: 3131
- LOC: Config.Announce.port
- DOC_START
- announce_host and announce_port set
- the hostname and port
- number where the registration message will be sent.
-
- Hostname will default to 'tracker.ircache.net' and port will
- default default to 3131. If the 'filename' argument is given,
- the contents of that file will be included in the announce
- message.
- DOC_END
-
- NAME: httpd_accel_surrogate_id
- IFDEF: ESI
- TYPE: string
- LOC: Config.Accel.surrogate_id
- DEFAULT: none
- DOC_START
- Surrogates (http://www.esi.org/architecture_spec_1.0.html)
- need an identification token to allow control targeting. Because
- a farm of surrogates may all perform the same tasks, they may share
- an identification token.
- DOC_END
-
- NAME: http_accel_surrogate_remote
- IFDEF: ESI
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.surrogate_is_remote
- DOC_START
- Remote surrogates (such as those in a CDN) honour Surrogate-Control: no-store-remote.
- Set this to on to have squid behave as a remote surrogate.
- DOC_END
-
- NAME: esi_parser
- IFDEF: ESI
- COMMENT: expat|custom
- TYPE: string
- LOC: ESIParser::Type
- DEFAULT: custom
- DOC_START
- ESI markup is not strictly XML compatible. The custom ESI parser
- will give higher performance, but cannot handle non ASCII character
- encodings.
- DOC_END
-
- COMMENT_START
- MISCELLANEOUS
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: dns_testnames
- TYPE: wordlist
- LOC: Config.dns_testname_list
- DEFAULT: none
- DEFAULT_IF_NONE: netscape.com internic.net nlanr.net microsoft.com
- DOC_START
- The DNS tests exit as soon as the first site is successfully looked up
-
- This test can be disabled with the -D command line option.
- DOC_END
-
-
- NAME: logfile_rotate
- TYPE: int
- DEFAULT: 10
- LOC: Config.Log.rotateNumber
- DOC_START
- Specifies the number of logfile rotations to make when you
- type 'squid -k rotate'. The default is 10, which will rotate
- with extensions 0 through 9. Setting logfile_rotate to 0 will
- disable the rotation, but the logfiles are still closed and
- re-opened. This will enable you to rename the logfiles
- yourself just before sending the rotate signal.
-
- Note, the 'squid -k rotate' command normally sends a USR1
- signal to the running squid process. In certain situations
- (e.g. on Linux with Async I/O), USR1 is used for other
- purposes, so -k rotate uses another signal. It is best to get
- in the habit of using 'squid -k rotate' instead of 'kill -USR1
- <pid>'.
- DOC_END
-
-
- NAME: append_domain
- TYPE: string
- LOC: Config.appendDomain
- DEFAULT: none
- DOC_START
- Appends local domain name to hostnames without any dots in
- them. append_domain must begin with a period.
-
- Be warned that there today is Internet names with no dots in
- them using only top-domain names, so setting this may
- cause some Internet sites to become unavailable.
-
- Example:
- append_domain .yourdomain.com
- DOC_END
-
-
- NAME: tcp_recv_bufsize
- COMMENT: (bytes)
- TYPE: b_size_t
- DEFAULT: 0 bytes
- LOC: Config.tcpRcvBufsz
- DOC_START
- Size of receive buffer to set
- for TCP sockets. Probably just
- as easy to change your kernel's default. Set to zero to use
- the default buffer size.
- DOC_END
-
- NAME: err_html_text
- TYPE: eol
- LOC: Config.errHtmlText
- DEFAULT: none
- DOC_START
- HTML text to include in error messages. Make this a "mailto"
- URL to your admin address, or maybe just a link to your
- organizations Web page.
-
- To include this in your error messages, you must rewrite
- the error template files (found in the "errors" directory).
- Wherever you want the 'err_html_text' line to appear,
- insert a %L tag in the error template file.
- DOC_END
-
- NAME: email_err_data
- COMMENT: on|off
- TYPE: onoff
- LOC: Config.onoff.emailErrData
- DEFAULT: on
- DOC_START
- If enabled, information about the occurred error will be
- included in the mailto links of the ERR pages (if %W is set)
- so that the email body then contains the data.
- Syntax is <A HREF="mailto:%w%W">%w</A>
- DOC_END
-
-
- NAME: deny_info
- TYPE: denyinfo
- LOC: Config.denyInfoList
- DEFAULT: none
- DOC_START
- Usage: deny_info err_page_name acl
- or deny_info http://... acl
- Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys
-
- This can be used to return a ERR_ page for requests which
- do not pass the 'http_access' rules. A single ACL will cause
- the http_access check to fail. If a 'deny_info' line exists
- for that ACL then Squid returns a corresponding error page.
-
- You may use ERR_ pages that come with Squid or create your own pages
- and put them into the configured errors/ directory.
-
- Alternatively you can specify an error URL. The browsers will then
- get redirected (302) to the specified URL. %s in the redirection
- URL will be replaced by the requested URL.
-
- Alternatively you can tell Squid to reset the TCP connection
- by specifying TCP_RESET.
- DOC_END
-
- NAME: memory_pools
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.mem_pools
- DOC_START
- If set, Squid will keep pools of allocated (but unused) memory
- available for future use. If memory is a premium on your
- system and you believe your malloc library outperforms Squid
- routines, disable this.
- DOC_END
-
- NAME: memory_pools_limit
- COMMENT: (bytes)
- TYPE: b_size_t
- DEFAULT: none
- LOC: Config.MemPools.limit
- DOC_START
- Used only with memory_pools on:
- memory_pools_limit 50 MB
-
- If set to a non-zero value, Squid will keep at most the specified
- limit of allocated (but unused) memory in memory pools. All free()
- requests that exceed this limit will be handled by your malloc
- library. Squid does not pre-allocate any memory, just safe-keeps
- objects that otherwise would be free()d. Thus, it is safe to set
- memory_pools_limit to a reasonably high value even if your
- configuration will use less memory.
-
- If not set (default) or set to zero, Squid will keep all memory it
- can. That is, there will be no limit on the total amount of memory
- used for safe-keeping.
-
- To disable memory allocation optimization, do not set
- memory_pools_limit to 0. Set memory_pools to "off" instead.
-
- An overhead for maintaining memory pools is not taken into account
- when the limit is checked. This overhead is close to four bytes per
- object kept. However, pools may actually _save_ memory because of
- reduced memory thrashing in your malloc library.
- DOC_END
-
- NAME: via
- IFDEF: HTTP_VIOLATIONS
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.via
- DOC_START
- If set (default), Squid will include a Via header in requests and
- replies as required by RFC2616.
- DOC_END
-
- NAME: forwarded_for
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: on
- LOC: opt_forwarded_for
- DOC_START
- If set, Squid will include your system's IP address or name
- in the HTTP requests it forwards. By default it looks like
- this:
-
- X-Forwarded-For: 192.1.2.3
-
- If you disable this, it will appear as
-
- X-Forwarded-For: unknown
- DOC_END
-
- NAME: log_icp_queries
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.log_udp
- DOC_START
- If set
- , ICP queries are logged to access.log. You may wish
- do
- disable this if your ICP load is VERY high to speed things
- up or to simplify log analysis.
- DOC_END
-
- NAME: icp_hit_stale
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.icp_hit_stale
- DOC_START
- If you want to return ICP_HIT for stale cache objects, set
- this
- option to 'on'. If you have sibling relationships with caches
- in other administrative domains, this should be 'off'. If you only
- have sibling relationships with caches under your control, then
- it is probably okay to set
- this to 'on'.
- If set
- to 'on', then your siblings should use the option "allow-miss"
- on their cache_peer lines for connecting to you.
- DOC_END
-
-
- NAME: minimum_direct_hops
- TYPE: int
- DEFAULT: 4
- LOC: Config.minDirectHops
- DOC_START
- If using the ICMP pinging stuff, do
- direct fetches for sites
- which are no more than this many hops away.
- DOC_END
-
- NAME: minimum_direct_rtt
- TYPE: int
- DEFAULT: 400
- LOC: Config.minDirectRtt
- DOC_START
- If using the ICMP pinging stuff, do
- direct fetches for sites
- which are no more than this many rtt milliseconds away.
- DOC_END
-
- NAME: cachemgr_passwd
- TYPE: cachemgrpasswd
- DEFAULT: none
- LOC: Config.passwd_list
- DOC_START
- Specify passwords for cachemgr operations.
-
- Usage: cachemgr_passwd password action action ...
-
- Some valid actions are (see cache manager menu for a full list):
- 5min
- 60min
- asndb
- authenticator
- cbdata
- client_list
- comm_incoming
- config *
- counters
- delay
- digest_stats
- dns
- events
- filedescriptors
- fqdncache
- histograms
- http_headers
- info
- io
- ipcache
- mem
- menu
- netdb
- non_peers
- objects
- offline_toggle *
- pconn
- peer_select
- redirector
- refresh
- server_list
- shutdown *
- store_digest
- storedir
- utilization
- via_headers
- vm_objects
-
- * Indicates actions which will not be performed without a
- valid password, others can be performed if not listed here.
-
- To disable an action, set
- the password to "disable".
- To allow performing an action without a password, set
- the
- password to "none".
-
- Use the keyword "all" to set
- the same password for all actions.
-
- Example:
- cachemgr_passwd secret shutdown
- cachemgr_passwd lesssssssecret info stats/objects
- cachemgr_passwd disable all
- DOC_END
-
- NAME: store_avg_object_size
- COMMENT: (kbytes)
- TYPE: kb_size_t
- DEFAULT: 13 KB
- LOC: Config.Store.avgObjectSize
- DOC_START
- Average object size, used to estimate number of objects your
- cache can hold. See doc/Release-Notes-1.1.txt. The default is
- 13 KB.
- DOC_END
-
- NAME: store_objects_per_bucket
- TYPE: int
- DEFAULT: 20
- LOC: Config.Store.objectsPerBucket
- DOC_START
- Target number of objects per bucket in the store hash table.
- Lowering this value increases the total number of buckets and
- also the storage maintenance rate. The default is 50.
- DOC_END
-
- NAME: client_db
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: on
- LOC: Config.onoff.client_db
- DOC_START
- If you want to disable collecting per-client statistics, then
- turn off client_db here.
- DOC_END
-
-
- NAME: netdb_low
- TYPE: int
- DEFAULT: 900
- LOC: Config.Netdb.low
- DOC_NONE
-
- NAME: netdb_high
- TYPE: int
- DEFAULT: 1000
- LOC: Config.Netdb.high
- DOC_START
- The low and high water marks for the ICMP measurement
- database. These are counts, not percents. The defaults are
- 900 and 1000. When the high water mark is reached, database
- entries will be deleted until the low mark is reached.
- DOC_END
-
-
- NAME: netdb_ping_period
- TYPE: time_t
- LOC: Config.Netdb.period
- DEFAULT: 5 minutes
- DOC_START
- The minimum period for measuring a site. There will be at
- least this much delay between successive pings to the same
- network. The default is five minutes.
- DOC_END
-
-
- NAME: query_icmp
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.query_icmp
- DOC_START
- If you want to ask your peers to include ICMP data in their ICP
- replies, enable this option.
-
- If your peer has configured Squid (during compilation) with
- '--enable-icmp' then that peer will send ICMP pings to origin server
- sites of the URLs it receives. If you enable this option then the
- ICP replies from that peer will include the ICMP data (if available).
- Then, when choosing a parent cache, Squid will choose the parent with
- the minimal RTT to the origin server. When this happens, the
- hierarchy field of the access.log will be
- "CLOSEST_PARENT_MISS". This option is off by default.
- DOC_END
-
- NAME: test_reachability
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.test_reachability
- DOC_START
- When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH
- instead of ICP_MISS if the target host is NOT in the ICMP
- database, or has a zero RTT.
- DOC_END
-
- NAME: buffered_logs
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.buffered_logs
- DOC_START
- cache.log log file is written with stdio functions, and as such
- it can be buffered or unbuffered. By default it will be unbuffered.
- Buffering it can speed up the writing slightly (though you are
- unlikely to need to worry unless you run with tons of debugging
- enabled in which case performance will suffer badly anyway..).
- DOC_END
-
- NAME: reload_into_ims
- IFDEF: HTTP_VIOLATIONS
- COMMENT: on|off
- TYPE: onoff
- DEFAULT: off
- LOC: Config.onoff.reload_into_ims
- DOC_START
- When you enable this option, client no-cache or ``reload''
- requests will be changed to If-Modified-Since requests.
- Doing this VIOLATES the HTTP standard. Enabling this
- feature could make you liable for problems which it
- causes.
-
- see also refresh_pattern for a more selective approach.
- DOC_END
-
- NAME: always_direct
- TYPE: acl_access
- LOC: Config.accessList.AlwaysDirect
- DEFAULT: none
- DOC_START
- Usage: always_direct allow|deny [!]aclname ...
-
- Here you can use ACL elements to specify requests which should
- ALWAYS be forwarded directly to origin servers. For example,
- to always directly forward requests for local servers use
- something like:
-
- acl local-servers dstdomain my.domain.net
- always_direct allow local-servers
-
- To always forward FTP requests directly, use
-
- acl FTP proto FTP
- always_direct allow FTP
-
- NOTE: There is a similar, but opposite option named
- 'never_direct'. You need to be aware that "always_direct deny
- foo" is NOT the same thing as "never_direct allow foo". You
- may need to use a deny rule to exclude a more-specific case of
- some other rule. Example:
-
- acl local-external dstdomain external.foo.net
- acl local-servers dstdomain .foo.net
- always_direct deny local-external
- always_direct allow local-servers
-
- This option replaces some v1.1 options such as local_domain
- and local_ip.
- DOC_END
-
- NAME: never_direct
- TYPE: acl_access
- LOC: Config.accessList.NeverDirect
- DEFAULT: none
- DOC_START
- Usage: never_direct allow|deny [!]aclname ...
-
- never_direct is the opposite of always_direct. Please read
- the description for always_direct if you have not already.
-
- With 'never_direct' you can use ACL elements to specify
- requests which should NEVER be forwarded directly to origin
- servers. For example, to force the use of a proxy for all
- requests, except those in your local domain use something like:
-
- acl local-servers dstdomain .foo.net
- acl all src 0.0.0.0/0.0.0.0
- never_direct deny local-servers
- never_direct allow all
-
- or if squid is inside a firewall and there is local intranet
- servers inside the firewall then use something like:
-
- acl local-intranet dstdomain .foo.net
- acl local-external dstdomain external.foo.net
- always_direct deny local-external
- always_direct allow local-intranet
- never_direct allow all
-
- This option replaces some v1.1 options such as inside_firewall
- and firewall_ip.
- DOC_END
-
- NAME: header_access
- IFDEF: HTTP_VIOLATIONS
- TYPE: http_header_access[]
- LOC: Config.header_access
- DEFAULT: none
- DOC_START
- Usage: header_access header_name allow|deny [!]aclname ...
-
- WARNING: Doing this VIOLATES the HTTP standard. Enabling
- this feature could make you liable for problems which it
- causes.
-
- This option replaces the old 'anonymize_headers' and the
- older 'http_anonymizer' option with something that is much
- more configurable. This new method creates a list of ACLs
- for each header, allowing you very fine-tuned header
- mangling.
-
- You can only specify known headers for the header name.
- Other headers are reclassified as 'Other'. You can also
- refer to all the headers with 'All'.
-
- For example, to achieve the same behaviour as the old
- 'http_anonymizer standard' option, you should use:
-
- header_access From deny all
- header_access Referer deny all
- header_access Server deny all
- header_access User-Agent deny all
- header_access WWW-Authenticate deny all
- header_access Link deny all
-
- Or, to reproduce the old 'http_anonymizer paranoid' feature
- you should use:
-
- header_access Allow allow all
- header_access Authorization allow all
- header_access WWW-Authenticate allow all
- header_access Cache-Control allow all
- header_access Content-Encoding allow all
- header_access Content-Length allow all
- header_access Content-Type allow all
- header_access Date allow all
- header_access Expires allow all
- header_access Host allow all
- header_access If-Modified-Since allow all
- header_access Last-Modified allow all
- header_access Location allow all
- header_access Pragma allow all
- header_access Accept allow all
- header_access Accept-Charset allow all
- header_access Accept-Encoding allow all
- header_access Accept-Language allow all
- header_access Content-Language allow all
- header_access Mime-Version allow all
- header_access Retry-After allow all
- header_access Title allow all
- header_access Connection allow all
- header_access Proxy-Connection allow all
- header_access All deny all
-
- By default, all headers are allowed (no anonymizing is
- performed).
- DOC_END
-
- NAME: header_replace
- IFDEF: HTTP_VIOLATIONS
- TYPE: http_header_replace[]
- LOC: Config.header_access
- DEFAULT: none
- DOC_START
- Usage: header_replace header_name message
- Example: header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit)
-
- This option allows you to change the contents of headers
- denied with header_access above, by replacing them with
- some fixed string. This replaces the old fake_user_agent
- option.
-
- By default, headers are removed if denied.
- DOC_END
-
- NAME: icon_directory
-
- TYPE: string
-
- LOC: Config.icons.directory
-
- DEFAULT: @DEFAULT_ICON_DIR@
- DOC_START
- Where the icons are stored. These are normally kept in
- @DEFAULT_ICON_DIR@
- DOC_END
-
- NAME: error_directory
-
- TYPE: string
-
- LOC: Config.errorDirectory
-
- DEFAULT: @DEFAULT_ERROR_DIR@
- DOC_START
- If you wish to create your own versions of the default
- (English) error files, either to customize them to suit your
- language or company copy the template English files to another
- directory and point this tag at them.
- DOC_END
-
- NAME: minimum_retry_timeout
-
- COMMENT: (seconds)
-
- TYPE: time_t
-
- LOC: Config.retry.timeout
-
- DEFAULT: 5 seconds
- DOC_START
- This specifies the minimum connect timeout, for when the
- connect timeout is reduced to compensate for the availability
- of multiple IP addresses.
-
- When a connection to a host is initiated, and that host has
- several IP addresses, the default connection timeout is reduced
- by dividing it by the number of addresses. So, a site with 15
- addresses would then have a timeout of 8 seconds for each
- address attempted. To avoid having the timeout reduced to the
- point where even a working host would not have a chance to
- respond, this setting is provided. The default, and the
- minimum value, is five seconds, and the maximum value is sixty
- seconds, or half of connect_timeout, whichever is greater and
- less than connect_timeout.
- DOC_END
-
- NAME: maximum_single_addr_tries
-
- TYPE: int
-
- LOC: Config.retry.maxtries
-
- DEFAULT: 3
- DOC_START
- This sets the maximum number of connection attempts for a
- host that only has one address (for multiple-address hosts,
- each address is tried once).
-
- The default value is three tries, the (not recommended)
- maximum is 255 tries. A warning message will be generated
- if it is set to a value greater than ten.
- DOC_END
-
- NAME: snmp_port
-
- TYPE: ushort
-
- LOC: Config.Port.snmp
-
- DEFAULT: 3401
-
- IFDEF: SQUID_SNMP
- DOC_START
- Squid can now serve statistics and status information via SNMP.
- By default it listens to port 3401 on the machine. If you don't
- wish to use SNMP, set this to "0".
- DOC_END
-
- NAME: snmp_access
- TYPE: acl_access
- LOC: Config.accessList.snmp
- DEFAULT: none
- DEFAULT_IF_NONE: deny all
- IFDEF: SQUID_SNMP
- DOC_START
- Allowing or denying access to the SNMP port.
-
- All access to the agent is denied by default.
- usage:
-
- snmp_access allow|deny [!]aclname ...
-
- Example:
- snmp_access allow snmppublic localhost
- snmp_access deny all
- DOC_END
-
- NAME: snmp_incoming_address
- TYPE: address
- LOC: Config.Addrs.snmp_incoming
- DEFAULT: 0.0.0.0
- IFDEF: SQUID_SNMP
- DOC_NONE
- NAME: snmp_outgoing_address
- TYPE: address
- LOC: Config.Addrs.snmp_outgoing
- DEFAULT: 255.255.255.255
- IFDEF: SQUID_SNMP
- DOC_START
- Just like 'udp_incoming_address' above, but for the SNMP port.
-
- snmp_incoming_address is used for the SNMP socket receiving
- messages from SNMP agents.
- snmp_outgoing_address is used for SNMP packets returned to SNMP
- agents.
-
- The default snmp_incoming_address (0.0.0.0) is to listen on all
- available network interfaces.
-
- If snmp_outgoing_address is set to 255.255.255.255 (the default)
- then it will use the same socket as snmp_incoming_address. Only
- change this if you want to have SNMP replies sent using another
- address than where this Squid listens for SNMP queries.
-
- NOTE, snmp_incoming_address and snmp_outgoing_address can not have
- the same value since they both use port 3401.
- DOC_END
-
- NAME: as_whois_server
- TYPE: string
- LOC: Config.as_whois_server
- DEFAULT: whois.ra.net
- DEFAULT_IF_NONE: whois.ra.net
- DOC_START
- WHOIS server to query for AS numbers. NOTE: AS numbers are
- queried only when Squid starts up, not for every request.
- DOC_END
-
- NAME: wccp_router
- TYPE: address
- LOC: Config.Wccp.router
- DEFAULT: 0.0.0.0
- IFDEF: USE_WCCP
- DOC_START
- Use this option to define your WCCP ``home'' router for
- Squid. Setting the 'wccp_router' to 0.0.0.0 (the default)
- disables WCCP.
- DOC_END
-
- NAME: wccp_version
- TYPE: int
- LOC: Config.Wccp.version
- DEFAULT: 4
- IFDEF: USE_WCCP
- DOC_START
- According to some users, Cisco IOS 11.2 only supports WCCP
- version 3. If you're using that version of IOS, change
- this value to 3.
- DOC_END
-
- NAME: wccp_incoming_address
-
- TYPE: address
-
- LOC: Config.Wccp.incoming
-
- DEFAULT: 0.0.0.0
-
- IFDEF: USE_WCCP
- DOC_NONE
-
- NAME: wccp_outgoing_address
-
- TYPE: address
-
- LOC: Config.Wccp.outgoing
-
- DEFAULT: 255.255.255.255
-
- IFDEF: USE_WCCP
- DOC_START
- wccp_incoming_address Use this option if you require WCCP
- messages to be received on only one
- interface. Do NOT use this option if
- you're unsure how many interfaces you
- have, or if you know you have only one
- interface.
-
- wccp_outgoing_address Use this option if you require WCCP
- messages to be sent out on only one
- interface. Do NOT use this option if
- you're unsure how many interfaces you
- have, or if you know you have only one
- interface.
-
- The default behavior is to not bind to any specific address.
-
- NOTE, wccp_incoming_address and wccp_outgoing_address can not have
- the same value since they both use port 2048.
- DOC_END
-
-
- COMMENT_START
- DELAY POOL PARAMETERS (all require DELAY_POOLS compilation option)
- -----------------------------------------------------------------------------
- COMMENT_END
-
- NAME: delay_pools
-
- TYPE: delay_pool_count
-
- DEFAULT: 0
-
- IFDEF: DELAY_POOLS
-
- LOC: Config.Delay
- DOC_START
- This represents the number of delay pools to be used. For example,
- if you have one class 2 delay pool and one class 3 delays pool, you
- have a total of 2 delay pools.
- DOC_END
-
- NAME: delay_class
-
- TYPE: delay_pool_class
-
- DEFAULT: none
-
- IFDEF: DELAY_POOLS
-
- LOC: Config.Delay
- DOC_START
- This defines the class of each delay pool. There must be exactly one
- delay_class line for each delay pool. For example, to define two
- delay pools, one of class 2 and one of class 3, the settings above
-
- and here would be:
-
- Example:
- delay_pools 4 # 4 delay pools
- delay_class 1 2 # pool 1 is a class 2 pool
- delay_class 2 3 # pool 2 is a class 3 pool
- delay_class 3 4 # pool 3 is a class 4 pool
- delay_class 4 5 # pool 4 is a class 5 pool
-
- The delay pool classes are:
-
- class 1 Everything is limited by a single aggregate
- bucket.
-
- class 2 Everything is limited by a single aggregate
- bucket as well as an "individual" bucket chosen
- from bits 25 through 32 of the IP address.
+NOCOMMENT_END
+DOC_END
+
+
+NAME: cache_peer_access
+TYPE: peer_access
+DEFAULT: none
+LOC: none
+DOC_START
+ Similar to 'cache_peer_domain' but provides more flexibility by
+ using ACL elements.
+
+ cache_peer_access cache-host allow|deny [!]aclname ...
+
+ The syntax is identical to 'http_access' and the other lists of
+ ACL elements. See the comments for 'http_access' below, or
+ the Squid FAQ (http://www.squid-cache.org/FAQ/FAQ-10.html).
+DOC_END
+
+NAME: ident_lookup_access
+TYPE: acl_access
+IFDEF: USE_IDENT
+DEFAULT: none
+DEFAULT_IF_NONE: deny all
+LOC: Config.accessList.identLookup
+DOC_START
+ A list of ACL elements which, if matched, cause an ident
+ (RFC 931) lookup to be performed for this request. For
+ example, you might choose to always perform ident lookups
+ for your main multi-user Unix boxes, but not for your Macs
+ and PCs. By default, ident lookups are not performed for
+ any requests.
+
+ To enable ident lookups for specific client addresses, you
+ can follow this example:
+
+ acl ident_aware_hosts src 198.168.1.0/255.255.255.0
+ ident_lookup_access allow ident_aware_hosts
+ ident_lookup_access deny all
+
+ Only src type ACL checks are fully supported. A src_domain
+ ACL might work at times, but it will not always provide
+ the correct result.
+DOC_END
+
+NAME: tcp_outgoing_tos tcp_outgoing_ds tcp_outgoing_dscp
+TYPE: acl_tos
+DEFAULT: none
+LOC: Config.accessList.outgoing_tos
+DOC_START
+ Allows you to select a TOS/Diffserv value to mark outgoing
+ connections with, based on the username or source address
+ making the request.
+
+ tcp_outgoing_tos ds-field [!]aclname ...
+
+ Example where normal_service_net uses the TOS value 0x00
+ and normal_service_net uses 0x20
+
+ acl normal_service_net src 10.0.0.0/255.255.255.0
+ acl good_service_net src 10.0.1.0/255.255.255.0
+ tcp_outgoing_tos 0x00 normal_service_net 0x00
+ tcp_outgoing_tos 0x20 good_service_net
+
+ TOS/DSCP values really only have local significance - so you should
+ know what you're specifying. For more, see RFC 2474
+
+ The TOS/DSCP byte must be exactly that - a byte, value 0 - 255, or
+ "default" to use whatever default your host has.
+
+ Processing proceeds in the order specified, and stops at first fully
+ matching line.
+DOC_END
+
+NAME: tcp_outgoing_address
+TYPE: acl_address
+DEFAULT: none
+LOC: Config.accessList.outgoing_address
+DOC_START
+ Allows you to map requests to different outgoing IP addresses
+ based on the username or sourceaddress of the user making
+ the request.
+
+ tcp_outgoing_address ipaddr [[!]aclname] ...
+
+ Example where requests from 10.0.0.0/24 will be forwareded
+ with source address 10.1.0.1, 10.0.2.0/24 forwarded with
+ source address 10.1.0.2 and the rest will be forwarded with
+ source address 10.1.0.3.
+
+ acl normal_service_net src 10.0.0.0/255.255.255.0
+ acl good_service_net src 10.0.1.0/255.255.255.0
+ tcp_outgoing_address 10.0.0.1 normal_service_net
+ tcp_outgoing_address 10.0.0.2 good_service_net
+ tcp_outgoing_address 10.0.0.3
+
+ Processing proceeds in the order specified, and stops at first fully
+ matching line.
+DOC_END
+
+NAME: reply_body_max_size
+COMMENT: size [acl acl...]
+TYPE: acl_b_size_t
+DEFAULT: none
+LOC: Config.ReplyBodySize
+DOC_START
+ This option specifies the maximum size of a reply body. It can be
+ used to prevent users from downloading very large files, such as
+ MP3's and movies. When the reply headers are recieved, the
+ reply_body_max_size lines are processed, and the first line where
+ all (if any) listed acls are true is used as the maximum body size
+ for this reply.
+
+ This size is then checked twice. First when we get the reply headers,
+ we check the content-length value. If the content length value exists
+ and is larger than the allowed size, the request is denied and the
+ user receives an error message that says "the request or reply
+ is too large." If there is no content-length, and the reply
+ size exceeds this limit, the client's connection is just closed
+ and they will receive a partial reply.
+
+ WARNING: downstream caches probably can not detect a partial reply
+ if there is no content-length header, so they will cache
+ partial responses and give them out as hits. You should NOT
+ use this option if you have downstream caches.
+
+ WARNING: A maximum size smaller than the size of squid's error messages
+ will cause an infinite loop and crash squid. Ensure that the smallest
+ non-zero value you use is greater that the maximum header size plus
+ the size of your largest error page.
+
+ If you set this parameter none (the default), there will be
+ no limit imposed.
+DOC_END
- class 3 Everything is limited by a single aggregate
- bucket as well as a "network" bucket chosen
- from bits 17 through 24 of the IP address and a
- "individual" bucket chosen from bits 17 through
- 32 of the IP address.
-
- class 4 Everything in a class 3 delay pool, with an
- additional limit on a per user basis. This
- only takes effect if the username is established
- in advance - by forcing authentication in your
- http_access rules.
-
- class 5 Requests are grouped according their tag (see
- external_acl's tag= reply).
-
- NOTE: If an IP address is a.b.c.d
- -> bits 25 through 32 are "d"
- -> bits 17 through 24 are "c"
- -> bits 17 through 32 are "c * 256 + d"
- DOC_END
-
- NAME: delay_access
- TYPE: delay_pool_access
- DEFAULT: none
- IFDEF: DELAY_POOLS
- LOC: Config.Delay
- DOC_START
- This is used to determine which delay pool a request falls into.
- The first matched delay pool is always used, i.e., if a request falls
- into delay pool number one, no more delay are checked, otherwise the
- rest are checked in order of their delay pool number until they have
- all been checked. For example, if you want some_big_clients in delay
- pool 1 and lotsa_little_clients in delay pool 2:
-
- Example:
- delay_access 1 allow some_big_clients
- delay_access 1 deny all
- delay_access 2 allow lotsa_little_clients
- delay_access 2 deny all
- delay_access 3 allow authenticated_clients
- DOC_END
+COMMENT_START
+ ADMINISTRATIVE PARAMETERS
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: cache_mgr
+TYPE: string
+DEFAULT: webmaster
+LOC: Config.adminEmail
+DOC_START
+ Email-address of local cache manager who will receive
+ mail if the cache dies. The default is "webmaster."
+DOC_END
+
+
+NAME: cache_effective_user
+TYPE: string
+DEFAULT: nobody
+LOC: Config.effectiveUser
+DOC_NONE
+
+NAME: cache_effective_group
+TYPE: string
+DEFAULT: none
+LOC: Config.effectiveGroup
+DOC_START
+
+ If you start Squid as root, it will change its effective/real
+ UID/GID to the UID/GID specified below. The default is to
+ change to UID to nobody. If you define cache_effective_user,
+ but not cache_effective_group, Squid sets the GID the
+ effective user's default group ID (taken from the password
+ file).
+
+ If Squid is not started as root, the cache_effective_user
+ value is ignored and the GID value is unchanged by default.
+ However, you can make Squid change its GID to another group
+ that the process owner is a member of. Note that if Squid
+ is not started as root then you cannot set http_port to a
+ value lower than 1024.
+DOC_END
+
+
+NAME: visible_hostname
+TYPE: string
+LOC: Config.visibleHostname
+DEFAULT: none
+DOC_START
+ If you want to present a special hostname in error messages, etc,
+ then define this. Otherwise, the return value of gethostname()
+ will be used. If you have multiple caches in a cluster and
+ get errors about IP-forwarding you must set them to have individual
+ names with this setting.
+DOC_END
+
+
+NAME: unique_hostname
+TYPE: string
+LOC: Config.uniqueHostname
+DEFAULT: none
+DOC_START
+ If you want to have multiple machines with the same
+ 'visible_hostname' then you must give each machine a different
+ 'unique_hostname' so that forwarding loops can be detected.
+DOC_END
+
+
+NAME: hostname_aliases
+TYPE: wordlist
+LOC: Config.hostnameAliases
+DEFAULT: none
+DOC_START
+ A list of other DNS names that your cache has.
+DOC_END
- NAME: delay_parameters
- TYPE: delay_pool_rates
- DEFAULT: none
- IFDEF: DELAY_POOLS
- LOC: Config.Delay
- DOC_START
- This defines the parameters for a delay pool. Each delay pool has
- a number of "buckets" associated with it, as explained in the
- description of delay_class. For a class 1 delay pool, the syntax is:
+COMMENT_START
+ OPTIONS FOR THE CACHE REGISTRATION SERVICE
+ -----------------------------------------------------------------------------
+
+ This section contains parameters for the (optional) cache
+ announcement service. This service is provided to help
+ cache administrators locate one another in order to join or
+ create cache hierarchies.
+
+ An 'announcement' message is sent (via UDP) to the registration
+ service by Squid. By default, the announcement message is NOT
+ SENT unless you enable it with 'announce_period' below.
+
+ The announcement message includes your hostname, plus the
+ following information from this configuration file:
+
+ http_port
+ icp_port
+ cache_mgr
+
+ All current information is processed regularly and made
+ available on the Web at http://www.ircache.net/Cache/Tracker/.
+COMMENT_END
+
+NAME: announce_period
+TYPE: time_t
+LOC: Config.Announce.period
+DEFAULT: 0
+DOC_START
+ This is how frequently to send cache announcements. The
+ default is `0' which disables sending the announcement
+ messages.
+
+ To enable announcing your cache, just uncomment the line
+ below.
+
+NOCOMMENT_START
+#To enable announcing your cache, just uncomment the line below.
+#announce_period 1 day
+NOCOMMENT_END
+DOC_END
+
+
+NAME: announce_host
+TYPE: string
+DEFAULT: tracker.ircache.net
+LOC: Config.Announce.host
+DOC_NONE
+
+NAME: announce_file
+TYPE: string
+DEFAULT: none
+LOC: Config.Announce.file
+DOC_NONE
+
+NAME: announce_port
+TYPE: ushort
+DEFAULT: 3131
+LOC: Config.Announce.port
+DOC_START
+ announce_host and announce_port set the hostname and port
+ number where the registration message will be sent.
+
+ Hostname will default to 'tracker.ircache.net' and port will
+ default default to 3131. If the 'filename' argument is given,
+ the contents of that file will be included in the announce
+ message.
+DOC_END
+
+NAME: httpd_accel_surrogate_id
+IFDEF: ESI
+TYPE: string
+LOC: Config.Accel.surrogate_id
+DEFAULT: none
+DOC_START
+ Surrogates (http://www.esi.org/architecture_spec_1.0.html)
+ need an identification token to allow control targeting. Because
+ a farm of surrogates may all perform the same tasks, they may share
+ an identification token.
+DOC_END
+
+NAME: http_accel_surrogate_remote
+IFDEF: ESI
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.surrogate_is_remote
+DOC_START
+ Remote surrogates (such as those in a CDN) honour Surrogate-Control: no-store-remote.
+ Set this to on to have squid behave as a remote surrogate.
+DOC_END
+
+NAME: esi_parser
+IFDEF: ESI
+COMMENT: expat|custom
+TYPE: string
+LOC: ESIParser::Type
+DEFAULT: custom
+DOC_START
+ ESI markup is not strictly XML compatible. The custom ESI parser
+ will give higher performance, but cannot handle non ASCII character
+ encodings.
+DOC_END
- delay_parameters pool aggregate
+COMMENT_START
+ MISCELLANEOUS
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: dns_testnames
+TYPE: wordlist
+LOC: Config.dns_testname_list
+DEFAULT: none
+DEFAULT_IF_NONE: netscape.com internic.net nlanr.net microsoft.com
+DOC_START
+ The DNS tests exit as soon as the first site is successfully looked up
+
+ This test can be disabled with the -D command line option.
+DOC_END
+
+
+NAME: logfile_rotate
+TYPE: int
+DEFAULT: 10
+LOC: Config.Log.rotateNumber
+DOC_START
+ Specifies the number of logfile rotations to make when you
+ type 'squid -k rotate'. The default is 10, which will rotate
+ with extensions 0 through 9. Setting logfile_rotate to 0 will
+ disable the rotation, but the logfiles are still closed and
+ re-opened. This will enable you to rename the logfiles
+ yourself just before sending the rotate signal.
+
+ Note, the 'squid -k rotate' command normally sends a USR1
+ signal to the running squid process. In certain situations
+ (e.g. on Linux with Async I/O), USR1 is used for other
+ purposes, so -k rotate uses another signal. It is best to get
+ in the habit of using 'squid -k rotate' instead of 'kill -USR1
+ <pid>'.
+DOC_END
+
+
+NAME: append_domain
+TYPE: string
+LOC: Config.appendDomain
+DEFAULT: none
+DOC_START
+ Appends local domain name to hostnames without any dots in
+ them. append_domain must begin with a period.
+
+ Be warned that there today is Internet names with no dots in
+ them using only top-domain names, so setting this may
+ cause some Internet sites to become unavailable.
+
+Example:
+ append_domain .yourdomain.com
+DOC_END
+
+
+NAME: tcp_recv_bufsize
+COMMENT: (bytes)
+TYPE: b_size_t
+DEFAULT: 0 bytes
+LOC: Config.tcpRcvBufsz
+DOC_START
+ Size of receive buffer to set for TCP sockets. Probably just
+ as easy to change your kernel's default. Set to zero to use
+ the default buffer size.
+DOC_END
+
+NAME: err_html_text
+TYPE: eol
+LOC: Config.errHtmlText
+DEFAULT: none
+DOC_START
+ HTML text to include in error messages. Make this a "mailto"
+ URL to your admin address, or maybe just a link to your
+ organizations Web page.
+
+ To include this in your error messages, you must rewrite
+ the error template files (found in the "errors" directory).
+ Wherever you want the 'err_html_text' line to appear,
+ insert a %L tag in the error template file.
+DOC_END
+
+NAME: email_err_data
+COMMENT: on|off
+TYPE: onoff
+LOC: Config.onoff.emailErrData
+DEFAULT: on
+DOC_START
+ If enabled, information about the occurred error will be
+ included in the mailto links of the ERR pages (if %W is set)
+ so that the email body then contains the data.
+ Syntax is <A HREF="mailto:%w%W">%w</A>
+DOC_END
+
+
+NAME: deny_info
+TYPE: denyinfo
+LOC: Config.denyInfoList
+DEFAULT: none
+DOC_START
+ Usage: deny_info err_page_name acl
+ or deny_info http://... acl
+ Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys
+
+ This can be used to return a ERR_ page for requests which
+ do not pass the 'http_access' rules. A single ACL will cause
+ the http_access check to fail. If a 'deny_info' line exists
+ for that ACL then Squid returns a corresponding error page.
+
+ You may use ERR_ pages that come with Squid or create your own pages
+ and put them into the configured errors/ directory.
+
+ Alternatively you can specify an error URL. The browsers will then
+ get redirected (302) to the specified URL. %s in the redirection
+ URL will be replaced by the requested URL.
+
+ Alternatively you can tell Squid to reset the TCP connection
+ by specifying TCP_RESET.
+DOC_END
+
+NAME: memory_pools
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.mem_pools
+DOC_START
+ If set, Squid will keep pools of allocated (but unused) memory
+ available for future use. If memory is a premium on your
+ system and you believe your malloc library outperforms Squid
+ routines, disable this.
+DOC_END
+
+NAME: memory_pools_limit
+COMMENT: (bytes)
+TYPE: b_size_t
+DEFAULT: none
+LOC: Config.MemPools.limit
+DOC_START
+ Used only with memory_pools on:
+ memory_pools_limit 50 MB
+
+ If set to a non-zero value, Squid will keep at most the specified
+ limit of allocated (but unused) memory in memory pools. All free()
+ requests that exceed this limit will be handled by your malloc
+ library. Squid does not pre-allocate any memory, just safe-keeps
+ objects that otherwise would be free()d. Thus, it is safe to set
+ memory_pools_limit to a reasonably high value even if your
+ configuration will use less memory.
+
+ If not set (default) or set to zero, Squid will keep all memory it
+ can. That is, there will be no limit on the total amount of memory
+ used for safe-keeping.
+
+ To disable memory allocation optimization, do not set
+ memory_pools_limit to 0. Set memory_pools to "off" instead.
+
+ An overhead for maintaining memory pools is not taken into account
+ when the limit is checked. This overhead is close to four bytes per
+ object kept. However, pools may actually _save_ memory because of
+ reduced memory thrashing in your malloc library.
+DOC_END
+
+NAME: via
+IFDEF: HTTP_VIOLATIONS
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.via
+DOC_START
+ If set (default), Squid will include a Via header in requests and
+ replies as required by RFC2616.
+DOC_END
+
+NAME: forwarded_for
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: on
+LOC: opt_forwarded_for
+DOC_START
+ If set, Squid will include your system's IP address or name
+ in the HTTP requests it forwards. By default it looks like
+ this:
+
+ X-Forwarded-For: 192.1.2.3
+
+ If you disable this, it will appear as
+
+ X-Forwarded-For: unknown
+DOC_END
+
+NAME: log_icp_queries
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.log_udp
+DOC_START
+ If set, ICP queries are logged to access.log. You may wish
+ do disable this if your ICP load is VERY high to speed things
+ up or to simplify log analysis.
+DOC_END
+
+NAME: icp_hit_stale
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.icp_hit_stale
+DOC_START
+ If you want to return ICP_HIT for stale cache objects, set this
+ option to 'on'. If you have sibling relationships with caches
+ in other administrative domains, this should be 'off'. If you only
+ have sibling relationships with caches under your control, then
+ it is probably okay to set this to 'on'.
+ If set to 'on', then your siblings should use the option "allow-miss"
+ on their cache_peer lines for connecting to you.
+DOC_END
+
+
+NAME: minimum_direct_hops
+TYPE: int
+DEFAULT: 4
+LOC: Config.minDirectHops
+DOC_START
+ If using the ICMP pinging stuff, do direct fetches for sites
+ which are no more than this many hops away.
+DOC_END
+
+NAME: minimum_direct_rtt
+TYPE: int
+DEFAULT: 400
+LOC: Config.minDirectRtt
+DOC_START
+ If using the ICMP pinging stuff, do direct fetches for sites
+ which are no more than this many rtt milliseconds away.
+DOC_END
+
+NAME: cachemgr_passwd
+TYPE: cachemgrpasswd
+DEFAULT: none
+LOC: Config.passwd_list
+DOC_START
+ Specify passwords for cachemgr operations.
+
+ Usage: cachemgr_passwd password action action ...
+
+ Some valid actions are (see cache manager menu for a full list):
+ 5min
+ 60min
+ asndb
+ authenticator
+ cbdata
+ client_list
+ comm_incoming
+ config *
+ counters
+ delay
+ digest_stats
+ dns
+ events
+ filedescriptors
+ fqdncache
+ histograms
+ http_headers
+ info
+ io
+ ipcache
+ mem
+ menu
+ netdb
+ non_peers
+ objects
+ offline_toggle *
+ pconn
+ peer_select
+ redirector
+ refresh
+ server_list
+ shutdown *
+ store_digest
+ storedir
+ utilization
+ via_headers
+ vm_objects
+
+ * Indicates actions which will not be performed without a
+ valid password, others can be performed if not listed here.
+
+ To disable an action, set the password to "disable".
+ To allow performing an action without a password, set the
+ password to "none".
+
+ Use the keyword "all" to set the same password for all actions.
+
+Example:
+ cachemgr_passwd secret shutdown
+ cachemgr_passwd lesssssssecret info stats/objects
+ cachemgr_passwd disable all
+DOC_END
+
+NAME: store_avg_object_size
+COMMENT: (kbytes)
+TYPE: kb_size_t
+DEFAULT: 13 KB
+LOC: Config.Store.avgObjectSize
+DOC_START
+ Average object size, used to estimate number of objects your
+ cache can hold. See doc/Release-Notes-1.1.txt. The default is
+ 13 KB.
+DOC_END
+
+NAME: store_objects_per_bucket
+TYPE: int
+DEFAULT: 20
+LOC: Config.Store.objectsPerBucket
+DOC_START
+ Target number of objects per bucket in the store hash table.
+ Lowering this value increases the total number of buckets and
+ also the storage maintenance rate. The default is 50.
+DOC_END
+
+NAME: client_db
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: on
+LOC: Config.onoff.client_db
+DOC_START
+ If you want to disable collecting per-client statistics, then
+ turn off client_db here.
+DOC_END
+
+
+NAME: netdb_low
+TYPE: int
+DEFAULT: 900
+LOC: Config.Netdb.low
+DOC_NONE
+
+NAME: netdb_high
+TYPE: int
+DEFAULT: 1000
+LOC: Config.Netdb.high
+DOC_START
+ The low and high water marks for the ICMP measurement
+ database. These are counts, not percents. The defaults are
+ 900 and 1000. When the high water mark is reached, database
+ entries will be deleted until the low mark is reached.
+DOC_END
+
+
+NAME: netdb_ping_period
+TYPE: time_t
+LOC: Config.Netdb.period
+DEFAULT: 5 minutes
+DOC_START
+ The minimum period for measuring a site. There will be at
+ least this much delay between successive pings to the same
+ network. The default is five minutes.
+DOC_END
+
+
+NAME: query_icmp
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.query_icmp
+DOC_START
+ If you want to ask your peers to include ICMP data in their ICP
+ replies, enable this option.
+
+ If your peer has configured Squid (during compilation) with
+ '--enable-icmp' then that peer will send ICMP pings to origin server
+ sites of the URLs it receives. If you enable this option then the
+ ICP replies from that peer will include the ICMP data (if available).
+ Then, when choosing a parent cache, Squid will choose the parent with
+ the minimal RTT to the origin server. When this happens, the
+ hierarchy field of the access.log will be
+ "CLOSEST_PARENT_MISS". This option is off by default.
+DOC_END
+
+NAME: test_reachability
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.test_reachability
+DOC_START
+ When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH
+ instead of ICP_MISS if the target host is NOT in the ICMP
+ database, or has a zero RTT.
+DOC_END
+
+NAME: buffered_logs
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.buffered_logs
+DOC_START
+ cache.log log file is written with stdio functions, and as such
+ it can be buffered or unbuffered. By default it will be unbuffered.
+ Buffering it can speed up the writing slightly (though you are
+ unlikely to need to worry unless you run with tons of debugging
+ enabled in which case performance will suffer badly anyway..).
+DOC_END
+
+NAME: reload_into_ims
+IFDEF: HTTP_VIOLATIONS
+COMMENT: on|off
+TYPE: onoff
+DEFAULT: off
+LOC: Config.onoff.reload_into_ims
+DOC_START
+ When you enable this option, client no-cache or ``reload''
+ requests will be changed to If-Modified-Since requests.
+ Doing this VIOLATES the HTTP standard. Enabling this
+ feature could make you liable for problems which it
+ causes.
+
+ see also refresh_pattern for a more selective approach.
+DOC_END
+
+NAME: always_direct
+TYPE: acl_access
+LOC: Config.accessList.AlwaysDirect
+DEFAULT: none
+DOC_START
+ Usage: always_direct allow|deny [!]aclname ...
+
+ Here you can use ACL elements to specify requests which should
+ ALWAYS be forwarded directly to origin servers. For example,
+ to always directly forward requests for local servers use
+ something like:
+
+ acl local-servers dstdomain my.domain.net
+ always_direct allow local-servers
+
+ To always forward FTP requests directly, use
+
+ acl FTP proto FTP
+ always_direct allow FTP
+
+ NOTE: There is a similar, but opposite option named
+ 'never_direct'. You need to be aware that "always_direct deny
+ foo" is NOT the same thing as "never_direct allow foo". You
+ may need to use a deny rule to exclude a more-specific case of
+ some other rule. Example:
+
+ acl local-external dstdomain external.foo.net
+ acl local-servers dstdomain .foo.net
+ always_direct deny local-external
+ always_direct allow local-servers
+
+ This option replaces some v1.1 options such as local_domain
+ and local_ip.
+DOC_END
+
+NAME: never_direct
+TYPE: acl_access
+LOC: Config.accessList.NeverDirect
+DEFAULT: none
+DOC_START
+ Usage: never_direct allow|deny [!]aclname ...
+
+ never_direct is the opposite of always_direct. Please read
+ the description for always_direct if you have not already.
+
+ With 'never_direct' you can use ACL elements to specify
+ requests which should NEVER be forwarded directly to origin
+ servers. For example, to force the use of a proxy for all
+ requests, except those in your local domain use something like:
+
+ acl local-servers dstdomain .foo.net
+ acl all src 0.0.0.0/0.0.0.0
+ never_direct deny local-servers
+ never_direct allow all
+
+ or if squid is inside a firewall and there is local intranet
+ servers inside the firewall then use something like:
+
+ acl local-intranet dstdomain .foo.net
+ acl local-external dstdomain external.foo.net
+ always_direct deny local-external
+ always_direct allow local-intranet
+ never_direct allow all
+
+ This option replaces some v1.1 options such as inside_firewall
+ and firewall_ip.
+DOC_END
+
+NAME: header_access
+IFDEF: HTTP_VIOLATIONS
+TYPE: http_header_access[]
+LOC: Config.header_access
+DEFAULT: none
+DOC_START
+ Usage: header_access header_name allow|deny [!]aclname ...
+
+ WARNING: Doing this VIOLATES the HTTP standard. Enabling
+ this feature could make you liable for problems which it
+ causes.
+
+ This option replaces the old 'anonymize_headers' and the
+ older 'http_anonymizer' option with something that is much
+ more configurable. This new method creates a list of ACLs
+ for each header, allowing you very fine-tuned header
+ mangling.
+
+ You can only specify known headers for the header name.
+ Other headers are reclassified as 'Other'. You can also
+ refer to all the headers with 'All'.
+
+ For example, to achieve the same behaviour as the old
+ 'http_anonymizer standard' option, you should use:
+
+ header_access From deny all
+ header_access Referer deny all
+ header_access Server deny all
+ header_access User-Agent deny all
+ header_access WWW-Authenticate deny all
+ header_access Link deny all
+
+ Or, to reproduce the old 'http_anonymizer paranoid' feature
+ you should use:
+
+ header_access Allow allow all
+ header_access Authorization allow all
+ header_access WWW-Authenticate allow all
+ header_access Cache-Control allow all
+ header_access Content-Encoding allow all
+ header_access Content-Length allow all
+ header_access Content-Type allow all
+ header_access Date allow all
+ header_access Expires allow all
+ header_access Host allow all
+ header_access If-Modified-Since allow all
+ header_access Last-Modified allow all
+ header_access Location allow all
+ header_access Pragma allow all
+ header_access Accept allow all
+ header_access Accept-Charset allow all
+ header_access Accept-Encoding allow all
+ header_access Accept-Language allow all
+ header_access Content-Language allow all
+ header_access Mime-Version allow all
+ header_access Retry-After allow all
+ header_access Title allow all
+ header_access Connection allow all
+ header_access Proxy-Connection allow all
+ header_access All deny all
+
+ By default, all headers are allowed (no anonymizing is
+ performed).
+DOC_END
+
+NAME: header_replace
+IFDEF: HTTP_VIOLATIONS
+TYPE: http_header_replace[]
+LOC: Config.header_access
+DEFAULT: none
+DOC_START
+ Usage: header_replace header_name message
+ Example: header_replace User-Agent Nutscrape/1.0 (CP/M; 8-bit)
+
+ This option allows you to change the contents of headers
+ denied with header_access above, by replacing them with
+ some fixed string. This replaces the old fake_user_agent
+ option.
+
+ By default, headers are removed if denied.
+DOC_END
+
+NAME: icon_directory
+TYPE: string
+LOC: Config.icons.directory
+DEFAULT: @DEFAULT_ICON_DIR@
+DOC_START
+ Where the icons are stored. These are normally kept in
+ @DEFAULT_ICON_DIR@
+DOC_END
+
+NAME: error_directory
+TYPE: string
+LOC: Config.errorDirectory
+DEFAULT: @DEFAULT_ERROR_DIR@
+DOC_START
+ If you wish to create your own versions of the default
+ (English) error files, either to customize them to suit your
+ language or company copy the template English files to another
+ directory and point this tag at them.
+DOC_END
+
+NAME: minimum_retry_timeout
+COMMENT: (seconds)
+TYPE: time_t
+LOC: Config.retry.timeout
+DEFAULT: 5 seconds
+DOC_START
+ This specifies the minimum connect timeout, for when the
+ connect timeout is reduced to compensate for the availability
+ of multiple IP addresses.
+
+ When a connection to a host is initiated, and that host has
+ several IP addresses, the default connection timeout is reduced
+ by dividing it by the number of addresses. So, a site with 15
+ addresses would then have a timeout of 8 seconds for each
+ address attempted. To avoid having the timeout reduced to the
+ point where even a working host would not have a chance to
+ respond, this setting is provided. The default, and the
+ minimum value, is five seconds, and the maximum value is sixty
+ seconds, or half of connect_timeout, whichever is greater and
+ less than connect_timeout.
+DOC_END
+
+NAME: maximum_single_addr_tries
+TYPE: int
+LOC: Config.retry.maxtries
+DEFAULT: 3
+DOC_START
+ This sets the maximum number of connection attempts for a
+ host that only has one address (for multiple-address hosts,
+ each address is tried once).
+
+ The default value is three tries, the (not recommended)
+ maximum is 255 tries. A warning message will be generated
+ if it is set to a value greater than ten.
+DOC_END
+
+NAME: snmp_port
+TYPE: ushort
+LOC: Config.Port.snmp
+DEFAULT: 3401
+IFDEF: SQUID_SNMP
+DOC_START
+ Squid can now serve statistics and status information via SNMP.
+ By default it listens to port 3401 on the machine. If you don't
+ wish to use SNMP, set this to "0".
+DOC_END
+
+NAME: snmp_access
+TYPE: acl_access
+LOC: Config.accessList.snmp
+DEFAULT: none
+DEFAULT_IF_NONE: deny all
+IFDEF: SQUID_SNMP
+DOC_START
+ Allowing or denying access to the SNMP port.
+
+ All access to the agent is denied by default.
+ usage:
+
+ snmp_access allow|deny [!]aclname ...
+
+Example:
+ snmp_access allow snmppublic localhost
+ snmp_access deny all
+DOC_END
+
+NAME: snmp_incoming_address
+TYPE: address
+LOC: Config.Addrs.snmp_incoming
+DEFAULT: 0.0.0.0
+IFDEF: SQUID_SNMP
+DOC_NONE
+NAME: snmp_outgoing_address
+TYPE: address
+LOC: Config.Addrs.snmp_outgoing
+DEFAULT: 255.255.255.255
+IFDEF: SQUID_SNMP
+DOC_START
+ Just like 'udp_incoming_address' above, but for the SNMP port.
+
+ snmp_incoming_address is used for the SNMP socket receiving
+ messages from SNMP agents.
+ snmp_outgoing_address is used for SNMP packets returned to SNMP
+ agents.
+
+ The default snmp_incoming_address (0.0.0.0) is to listen on all
+ available network interfaces.
+
+ If snmp_outgoing_address is set to 255.255.255.255 (the default)
+ then it will use the same socket as snmp_incoming_address. Only
+ change this if you want to have SNMP replies sent using another
+ address than where this Squid listens for SNMP queries.
+
+ NOTE, snmp_incoming_address and snmp_outgoing_address can not have
+ the same value since they both use port 3401.
+DOC_END
+
+NAME: as_whois_server
+TYPE: string
+LOC: Config.as_whois_server
+DEFAULT: whois.ra.net
+DEFAULT_IF_NONE: whois.ra.net
+DOC_START
+ WHOIS server to query for AS numbers. NOTE: AS numbers are
+ queried only when Squid starts up, not for every request.
+DOC_END
+
+NAME: wccp_router
+TYPE: address
+LOC: Config.Wccp.router
+DEFAULT: 0.0.0.0
+IFDEF: USE_WCCP
+DOC_START
+ Use this option to define your WCCP ``home'' router for
+ Squid. Setting the 'wccp_router' to 0.0.0.0 (the default)
+ disables WCCP.
+DOC_END
+
+NAME: wccp_version
+TYPE: int
+LOC: Config.Wccp.version
+DEFAULT: 4
+IFDEF: USE_WCCP
+DOC_START
+ According to some users, Cisco IOS 11.2 only supports WCCP
+ version 3. If you're using that version of IOS, change
+ this value to 3.
+DOC_END
+
+NAME: wccp_incoming_address
+TYPE: address
+LOC: Config.Wccp.incoming
+DEFAULT: 0.0.0.0
+IFDEF: USE_WCCP
+DOC_NONE
+NAME: wccp_outgoing_address
+TYPE: address
+LOC: Config.Wccp.outgoing
+DEFAULT: 255.255.255.255
+IFDEF: USE_WCCP
+DOC_START
+ wccp_incoming_address Use this option if you require WCCP
+ messages to be received on only one
+ interface. Do NOT use this option if
+ you're unsure how many interfaces you
+ have, or if you know you have only one
+ interface.
+
+ wccp_outgoing_address Use this option if you require WCCP
+ messages to be sent out on only one
+ interface. Do NOT use this option if
+ you're unsure how many interfaces you
+ have, or if you know you have only one
+ interface.
+
+ The default behavior is to not bind to any specific address.
+
+ NOTE, wccp_incoming_address and wccp_outgoing_address can not have
+ the same value since they both use port 2048.
+DOC_END
- For a class 2 delay pool:
- delay_parameters pool aggregate individual
-
- For a class 3 delay pool:
-
- delay_parameters pool aggregate network individual
-
- For a class 4 delay pool:
-
- delay_parameters pool aggregate network individual user
-
- For a class 5 delay pool:
-
- delay_parameters pool tag
-
- The variables here are:
-
- pool a pool number - ie, a number between 1 and the
- number specified in delay_pools as used in
- delay_class lines.
-
- aggregate the "delay parameters" for the aggregate bucket
- (class 1, 2, 3).
-
- individual the "delay parameters" for the individual
- buckets (class 2, 3).
-
- network the "delay parameters" for the network buckets
- (class 3).
-
- user the delay parameters for the user buckets
- (class 4).
-
- tag the delay parameters for the tag buckets
- (class 5).
-
- A pair of delay parameters is written restore/maximum, where restore is
- the number of bytes (not bits - modem and network speeds are usually
- quoted in bits) per second placed into the bucket, and maximum is the
- maximum number of bytes which can be in the bucket at any time.
-
- For example, if delay pool number 1 is a class 2 delay pool as in the
- above example, and is being used to strictly limit each host to 64kbps
- (plus overheads), with no overall limit, the line is:
-
- delay_parameters 1 -1/-1 8000/8000
-
- Note that the figure -1 is used to represent "unlimited".
-
- And, if delay pool number 2 is a class 3 delay pool as in the above
- example, and you want to limit it to a total of 256kbps (strict limit)
- with each 8-bit network permitted 64kbps (strict limit) and each
- individual host permitted 4800bps with a bucket maximum size of 64kb
- to permit a decent web page to be downloaded at a decent speed
- (if the network is not being limited due to overuse) but slow down
- large downloads more significantly:
-
- delay_parameters 2 32000/32000 8000/8000 600/8000
-
- There must be one delay_parameters line for each delay pool.
-
- Finally, for a class 4 delay pool as in the example - each user will
- be limited to 128Kb no matter how many workstations they are logged into.:
-
- delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000
- DOC_END
-
- NAME: delay_initial_bucket_level
- COMMENT: (percent, 0-100)
- TYPE: ushort
- DEFAULT: 50
- IFDEF: DELAY_POOLS
- LOC: Config.Delay.initial
- DOC_START
- The initial bucket percentage is used to determine how much is put
- in each bucket when squid starts, is reconfigured, or first notices
- a host accessing it (in class 2 and class 3, individual hosts and
- networks only have buckets associated with them once they have been
- "seen" by squid).
- DOC_END
-
- NAME: incoming_icp_average
- TYPE: int
- DEFAULT: 6
- LOC: Config.comm_incoming.icp_average
- DOC_NONE
-
- NAME: incoming_http_average
- TYPE: int
- DEFAULT: 4
- LOC: Config.comm_incoming.http_average
- DOC_NONE
-
- NAME: incoming_dns_average
- TYPE: int
- DEFAULT: 4
- LOC: Config.comm_incoming.dns_average
- DOC_NONE
-
- NAME: min_icp_poll_cnt
- TYPE: int
- DEFAULT: 8
- LOC: Config.comm_incoming.icp_min_poll
- DOC_NONE
-
- NAME: min_dns_poll_cnt
- TYPE: int
- DEFAULT: 8
- LOC: Config.comm_incoming.dns_min_poll
- DOC_NONE
-
- NAME: min_http_poll_cnt
- TYPE: int
- DEFAULT: 8
- LOC: Config.comm_incoming.http_min_poll
- DOC_START
- Heavy voodoo here. I can't even believe you are reading this.
- Are you crazy? Don't even think about adjusting these unless
- you understand the algorithms in comm_select.c first!
- DOC_END
-
- NAME: max_open_disk_fds
- TYPE: int
- LOC: Config.max_open_disk_fds
- DEFAULT: 0
- DOC_START
- To avoid having disk as the I/O bottleneck Squid can optionally
- bypass the on-disk cache if more than this amount of disk file
- descriptors are open.
-
- A value of 0 indicates no limit.
- DOC_END
-
- NAME: offline_mode
- TYPE: onoff
- LOC: Config.onoff.offline
- DEFAULT: off
- DOC_START
- Enable this option and Squid will never try to validate cached
- objects.
- DOC_END
-
- NAME: uri_whitespace
- TYPE: uri_whitespace
- LOC: Config.uri_whitespace
- DEFAULT: strip
- DOC_START
- What to do with requests that have whitespace characters in the
- URI. Options:
-
- strip: The whitespace characters are stripped out of the URL.
- This is the behavior recommended by RFC2616.
- deny: The request is denied. The user receives an "Invalid
- Request" message.
- allow: The request is allowed and the URI is not changed. The
- whitespace characters remain in the URI. Note the
- whitespace is passed to redirector processes if they
- are in use.
- encode: The request is allowed and the whitespace characters are
- encoded according to RFC1738. This could be considered
- a violation of the HTTP/1.1
- RFC because proxies are not allowed to rewrite URI's.
- chop: The request is allowed and the URI is chopped at the
- first whitespace. This might also be considered a
- violation.
- DOC_END
-
- NAME: broken_posts
- TYPE: acl_access
- DEFAULT: none
- LOC: Config.accessList.brokenPosts
- DOC_START
- A list of ACL elements which, if matched, causes Squid to send
- an extra CRLF pair after the body of a PUT/POST request.
-
- Some HTTP servers has broken implementations of PUT/POST,
- and rely on an extra CRLF pair sent by some WWW clients.
-
- Quote from RFC 2068 section 4.1 on this matter:
-
- Note: certain buggy HTTP/1.0 client implementations generate an
- extra CRLF's after a POST request. To restate what is explicitly
- forbidden by the BNF, an HTTP/1.1 client must not preface or follow
- a request with an extra CRLF.
-
- Example:
- acl buggy_server url_regex ^http://....
- broken_posts allow buggy_server
- DOC_END
-
- NAME: mcast_miss_addr
- IFDEF: MULTICAST_MISS_STREAM
- TYPE: address
- LOC: Config.mcast_miss.addr
- DEFAULT: 255.255.255.255
- DOC_START
- If you enable this option, every "cache miss" URL will
- be sent out on the specified multicast address.
-
- Do not enable this option unless you are are absolutely
- certain you understand what you are doing.
- DOC_END
-
- NAME: mcast_miss_ttl
- IFDEF: MULTICAST_MISS_TTL
- TYPE: ushort
- LOC: Config.mcast_miss.ttl
- DEFAULT: 16
- DOC_START
- This is the time-to-live value for packets multicasted
- when multicasting off cache miss URLs is enabled. By
- default this is set to 'site scope', i.e. 16.
- DOC_END
-
- NAME: mcast_miss_port
- IFDEF: MULTICAST_MISS_STREAM
- TYPE: ushort
- LOC: Config.mcast_miss.port
- DEFAULT: 3135
- DOC_START
- This is the port number to be used in conjunction with
- 'mcast_miss_addr'.
- DOC_END
-
- NAME: mcast_miss_encode_key
- IFDEF: MULTICAST_MISS_STREAM
- TYPE: string
- LOC: Config.mcast_miss.encode_key
- DEFAULT: XXXXXXXXXXXXXXXX
- DOC_START
- The URLs that are sent in the multicast miss stream are
- encrypted. This is the encryption key.
- DOC_END
-
- NAME: nonhierarchical_direct
- TYPE: onoff
- LOC: Config.onoff.nonhierarchical_direct
- DEFAULT: on
- DOC_START
- By default, Squid will send any non-hierarchical requests
- (matching hierarchy_stoplist or not cachable request type) direct
- to origin servers.
-
- If you set this to off, then Squid will prefer to send these
- requests to parents.
-
- Note that in most configurations, by turning this off you will only
- add latency to these request without any improvement in global hit
- ratio.
-
- If you are inside an firewall then see never_direct instead of
- this directive.
- DOC_END
-
- NAME: prefer_direct
- TYPE: onoff
- LOC: Config.onoff.prefer_direct
- DEFAULT: off
- DOC_START
- Normally Squid tries to use parents for most requests. If you by some
- reason like it to first try going direct and only use a parent if
- going direct fails then set this to on.
-
- By combining nonhierarchical_direct off and prefer_direct on you
- can set up Squid to use a parent as a backup path if going direct
- fails.
- DOC_END
-
- NAME: strip_query_terms
- TYPE: onoff
- LOC: Config.onoff.strip_query_terms
- DEFAULT: on
- DOC_START
- By default, Squid strips query terms from requested URLs before
- logging. This protects your user's privacy.
- DOC_END
-
- NAME: coredump_dir
- TYPE: string
- LOC: Config.coredump_dir
- DEFAULT: none
- DEFAULT_IF_NONE: none
- DOC_START
- By default Squid leaves core files in the directory from where
- it was started. If you set 'coredump_dir' to a directory
- that exists, Squid will chdir() to that directory at startup
- and coredump files will be left there.
-
- NOCOMMENT_START
+COMMENT_START
+ DELAY POOL PARAMETERS (all require DELAY_POOLS compilation option)
+ -----------------------------------------------------------------------------
+COMMENT_END
+
+NAME: delay_pools
+TYPE: delay_pool_count
+DEFAULT: 0
+IFDEF: DELAY_POOLS
+LOC: Config.Delay
+DOC_START
+ This represents the number of delay pools to be used. For example,
+ if you have one class 2 delay pool and one class 3 delays pool, you
+ have a total of 2 delay pools.
+DOC_END
+
+NAME: delay_class
+TYPE: delay_pool_class
+DEFAULT: none
+IFDEF: DELAY_POOLS
+LOC: Config.Delay
+DOC_START
+ This defines the class of each delay pool. There must be exactly one
+ delay_class line for each delay pool. For example, to define two
+ delay pools, one of class 2 and one of class 3, the settings above
+ and here would be:
+
+Example:
+ delay_pools 4 # 4 delay pools
+ delay_class 1 2 # pool 1 is a class 2 pool
+ delay_class 2 3 # pool 2 is a class 3 pool
+ delay_class 3 4 # pool 3 is a class 4 pool
+ delay_class 4 5 # pool 4 is a class 5 pool
+
+ The delay pool classes are:
+
+ class 1 Everything is limited by a single aggregate
+ bucket.
+
+ class 2 Everything is limited by a single aggregate
+ bucket as well as an "individual" bucket chosen
+ from bits 25 through 32 of the IP address.
+
+ class 3 Everything is limited by a single aggregate
+ bucket as well as a "network" bucket chosen
+ from bits 17 through 24 of the IP address and a
+ "individual" bucket chosen from bits 17 through
+ 32 of the IP address.
+
+ class 4 Everything in a class 3 delay pool, with an
+ additional limit on a per user basis. This
+ only takes effect if the username is established
+ in advance - by forcing authentication in your
+ http_access rules.
+
+ class 5 Requests are grouped according their tag (see
+ external_acl's tag= reply).
+
+ NOTE: If an IP address is a.b.c.d
+ -> bits 25 through 32 are "d"
+ -> bits 17 through 24 are "c"
+ -> bits 17 through 32 are "c * 256 + d"
+DOC_END
+
+NAME: delay_access
+TYPE: delay_pool_access
+DEFAULT: none
+IFDEF: DELAY_POOLS
+LOC: Config.Delay
+DOC_START
+ This is used to determine which delay pool a request falls into.
+ The first matched delay pool is always used, i.e., if a request falls
+ into delay pool number one, no more delay are checked, otherwise the
+ rest are checked in order of their delay pool number until they have
+ all been checked. For example, if you want some_big_clients in delay
+ pool 1 and lotsa_little_clients in delay pool 2:
+
+Example:
+ delay_access 1 allow some_big_clients
+ delay_access 1 deny all
+ delay_access 2 allow lotsa_little_clients
+ delay_access 2 deny all
+ delay_access 3 allow authenticated_clients
+DOC_END
+
+NAME: delay_parameters
+TYPE: delay_pool_rates
+DEFAULT: none
+IFDEF: DELAY_POOLS
+LOC: Config.Delay
+DOC_START
+ This defines the parameters for a delay pool. Each delay pool has
+ a number of "buckets" associated with it, as explained in the
+ description of delay_class. For a class 1 delay pool, the syntax is:
+
+delay_parameters pool aggregate
+
+ For a class 2 delay pool:
+
+delay_parameters pool aggregate individual
+
+ For a class 3 delay pool:
+
+delay_parameters pool aggregate network individual
+
+ For a class 4 delay pool:
+
+delay_parameters pool aggregate network individual user
+
+ For a class 5 delay pool:
+
+delay_parameters pool tag
+
+ The variables here are:
+
+ pool a pool number - ie, a number between 1 and the
+ number specified in delay_pools as used in
+ delay_class lines.
+
+ aggregate the "delay parameters" for the aggregate bucket
+ (class 1, 2, 3).
+
+ individual the "delay parameters" for the individual
+ buckets (class 2, 3).
+
+ network the "delay parameters" for the network buckets
+ (class 3).
+
+ user the delay parameters for the user buckets
+ (class 4).
+
+ tag the delay parameters for the tag buckets
+ (class 5).
+
+ A pair of delay parameters is written restore/maximum, where restore is
+ the number of bytes (not bits - modem and network speeds are usually
+ quoted in bits) per second placed into the bucket, and maximum is the
+ maximum number of bytes which can be in the bucket at any time.
+
+ For example, if delay pool number 1 is a class 2 delay pool as in the
+ above example, and is being used to strictly limit each host to 64kbps
+ (plus overheads), with no overall limit, the line is:
+
+delay_parameters 1 -1/-1 8000/8000
+
+ Note that the figure -1 is used to represent "unlimited".
+
+ And, if delay pool number 2 is a class 3 delay pool as in the above
+ example, and you want to limit it to a total of 256kbps (strict limit)
+ with each 8-bit network permitted 64kbps (strict limit) and each
+ individual host permitted 4800bps with a bucket maximum size of 64kb
+ to permit a decent web page to be downloaded at a decent speed
+ (if the network is not being limited due to overuse) but slow down
+ large downloads more significantly:
+
+delay_parameters 2 32000/32000 8000/8000 600/8000
+
+ There must be one delay_parameters line for each delay pool.
+
+ Finally, for a class 4 delay pool as in the example - each user will
+ be limited to 128Kb no matter how many workstations they are logged into.:
+
+delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000
+DOC_END
+
+NAME: delay_initial_bucket_level
+COMMENT: (percent, 0-100)
+TYPE: ushort
+DEFAULT: 50
+IFDEF: DELAY_POOLS
+LOC: Config.Delay.initial
+DOC_START
+ The initial bucket percentage is used to determine how much is put
+ in each bucket when squid starts, is reconfigured, or first notices
+ a host accessing it (in class 2 and class 3, individual hosts and
+ networks only have buckets associated with them once they have been
+ "seen" by squid).
+DOC_END
+
+NAME: incoming_icp_average
+TYPE: int
+DEFAULT: 6
+LOC: Config.comm_incoming.icp_average
+DOC_NONE
+
+NAME: incoming_http_average
+TYPE: int
+DEFAULT: 4
+LOC: Config.comm_incoming.http_average
+DOC_NONE
+
+NAME: incoming_dns_average
+TYPE: int
+DEFAULT: 4
+LOC: Config.comm_incoming.dns_average
+DOC_NONE
+
+NAME: min_icp_poll_cnt
+TYPE: int
+DEFAULT: 8
+LOC: Config.comm_incoming.icp_min_poll
+DOC_NONE
+
+NAME: min_dns_poll_cnt
+TYPE: int
+DEFAULT: 8
+LOC: Config.comm_incoming.dns_min_poll
+DOC_NONE
+
+NAME: min_http_poll_cnt
+TYPE: int
+DEFAULT: 8
+LOC: Config.comm_incoming.http_min_poll
+DOC_START
+ Heavy voodoo here. I can't even believe you are reading this.
+ Are you crazy? Don't even think about adjusting these unless
+ you understand the algorithms in comm_select.c first!
+DOC_END
+
+NAME: max_open_disk_fds
+TYPE: int
+LOC: Config.max_open_disk_fds
+DEFAULT: 0
+DOC_START
+ To avoid having disk as the I/O bottleneck Squid can optionally
+ bypass the on-disk cache if more than this amount of disk file
+ descriptors are open.
+
+ A value of 0 indicates no limit.
+DOC_END
+
+NAME: offline_mode
+TYPE: onoff
+LOC: Config.onoff.offline
+DEFAULT: off
+DOC_START
+ Enable this option and Squid will never try to validate cached
+ objects.
+DOC_END
+
+NAME: uri_whitespace
+TYPE: uri_whitespace
+LOC: Config.uri_whitespace
+DEFAULT: strip
+DOC_START
+ What to do with requests that have whitespace characters in the
+ URI. Options:
+
+ strip: The whitespace characters are stripped out of the URL.
+ This is the behavior recommended by RFC2616.
+ deny: The request is denied. The user receives an "Invalid
+ Request" message.
+ allow: The request is allowed and the URI is not changed. The
+ whitespace characters remain in the URI. Note the
+ whitespace is passed to redirector processes if they
+ are in use.
+ encode: The request is allowed and the whitespace characters are
+ encoded according to RFC1738. This could be considered
+ a violation of the HTTP/1.1
+ RFC because proxies are not allowed to rewrite URI's.
+ chop: The request is allowed and the URI is chopped at the
+ first whitespace. This might also be considered a
+ violation.
+DOC_END
+
+NAME: broken_posts
+TYPE: acl_access
+DEFAULT: none
+LOC: Config.accessList.brokenPosts
+DOC_START
+ A list of ACL elements which, if matched, causes Squid to send
+ an extra CRLF pair after the body of a PUT/POST request.
+
+ Some HTTP servers has broken implementations of PUT/POST,
+ and rely on an extra CRLF pair sent by some WWW clients.
+
+ Quote from RFC 2068 section 4.1 on this matter:
+
+ Note: certain buggy HTTP/1.0 client implementations generate an
+ extra CRLF's after a POST request. To restate what is explicitly
+ forbidden by the BNF, an HTTP/1.1 client must not preface or follow
+ a request with an extra CRLF.
+
+Example:
+ acl buggy_server url_regex ^http://....
+ broken_posts allow buggy_server
+DOC_END
+
+NAME: mcast_miss_addr
+IFDEF: MULTICAST_MISS_STREAM
+TYPE: address
+LOC: Config.mcast_miss.addr
+DEFAULT: 255.255.255.255
+DOC_START
+ If you enable this option, every "cache miss" URL will
+ be sent out on the specified multicast address.
+
+ Do not enable this option unless you are are absolutely
+ certain you understand what you are doing.
+DOC_END
+
+NAME: mcast_miss_ttl
+IFDEF: MULTICAST_MISS_TTL
+TYPE: ushort
+LOC: Config.mcast_miss.ttl
+DEFAULT: 16
+DOC_START
+ This is the time-to-live value for packets multicasted
+ when multicasting off cache miss URLs is enabled. By
+ default this is set to 'site scope', i.e. 16.
+DOC_END
+
+NAME: mcast_miss_port
+IFDEF: MULTICAST_MISS_STREAM
+TYPE: ushort
+LOC: Config.mcast_miss.port
+DEFAULT: 3135
+DOC_START
+ This is the port number to be used in conjunction with
+ 'mcast_miss_addr'.
+DOC_END
+
+NAME: mcast_miss_encode_key
+IFDEF: MULTICAST_MISS_STREAM
+TYPE: string
+LOC: Config.mcast_miss.encode_key
+DEFAULT: XXXXXXXXXXXXXXXX
+DOC_START
+ The URLs that are sent in the multicast miss stream are
+ encrypted. This is the encryption key.
+DOC_END
+
+NAME: nonhierarchical_direct
+TYPE: onoff
+LOC: Config.onoff.nonhierarchical_direct
+DEFAULT: on
+DOC_START
+ By default, Squid will send any non-hierarchical requests
+ (matching hierarchy_stoplist or not cachable request type) direct
+ to origin servers.
+
+ If you set this to off, then Squid will prefer to send these
+ requests to parents.
+
+ Note that in most configurations, by turning this off you will only
+ add latency to these request without any improvement in global hit
+ ratio.
+
+ If you are inside an firewall then see never_direct instead of
+ this directive.
+DOC_END
+
+NAME: prefer_direct
+TYPE: onoff
+LOC: Config.onoff.prefer_direct
+DEFAULT: off
+DOC_START
+ Normally Squid tries to use parents for most requests. If you by some
+ reason like it to first try going direct and only use a parent if
+ going direct fails then set this to on.
+
+ By combining nonhierarchical_direct off and prefer_direct on you
+ can set up Squid to use a parent as a backup path if going direct
+ fails.
+DOC_END
+
+NAME: strip_query_terms
+TYPE: onoff
+LOC: Config.onoff.strip_query_terms
+DEFAULT: on
+DOC_START
+ By default, Squid strips query terms from requested URLs before
+ logging. This protects your user's privacy.
+DOC_END
+
+NAME: coredump_dir
+TYPE: string
+LOC: Config.coredump_dir
+DEFAULT: none
+DEFAULT_IF_NONE: none
+DOC_START
+ By default Squid leaves core files in the directory from where
+ it was started. If you set 'coredump_dir' to a directory
+ that exists, Squid will chdir() to that directory at startup
+ and coredump files will be left there.
+
+NOCOMMENT_START
# Leave coredumps in the first cache dir
- coredump_dir @DEFAULT_SWAP_DIR@
- NOCOMMENT_END
- DOC_END
-
- NAME: redirector_bypass
- TYPE: onoff
- LOC: Config.onoff.redirector_bypass
- DEFAULT: off
- DOC_START
- When this is 'on', a request will not go through the
- redirector if all redirectors are busy. If this is 'off'
- and the redirector queue grows too large, Squid will exit
- with a FATAL error and ask you to increase the number of
- redirectors. You should only enable this if the redirectors
- are not critical to your caching system. If you use
- redirectors for access control, and you enable this option,
- then users may have access to pages that they should not
- be allowed to request.
- DOC_END
-
- NAME: ignore_unknown_nameservers
- TYPE: onoff
- LOC: Config.onoff.ignore_unknown_nameservers
- DEFAULT: on
- DOC_START
- By default Squid checks that DNS responses are received
- from the same IP addresses that they are sent to. If they
- don't match, Squid ignores the response and writes a warning
- message to cache.log. You can allow responses from unknown
- nameservers by setting this option to 'off'.
- DOC_END
-
- NAME: digest_generation
- IFDEF: USE_CACHE_DIGESTS
- TYPE: onoff
- LOC: Config.onoff.digest_generation
- DEFAULT: on
- DOC_START
- This controls whether the server will generate a Cache Digest
- of its contents. By default, Cache Digest generation is
- enabled if Squid is compiled with USE_CACHE_DIGESTS defined.
- DOC_END
-
- NAME: digest_bits_per_entry
- IFDEF: USE_CACHE_DIGESTS
- TYPE: int
- LOC: Config.digest.bits_per_entry
- DEFAULT: 5
- DOC_START
- This is the number of bits of the server's Cache Digest which
- will be associated with the Digest entry for a given HTTP
- Method and URL (public key) combination. The default is 5.
- DOC_END
-
- NAME: digest_rebuild_period
- IFDEF: USE_CACHE_DIGESTS
- COMMENT: (seconds)
- TYPE: time_t
- LOC: Config.digest.rebuild_period
- DEFAULT: 1 hour
- DOC_START
- This is the number of seconds between Cache Digest rebuilds.
- DOC_END
-
- NAME: digest_rewrite_period
- COMMENT: (seconds)
- IFDEF: USE_CACHE_DIGESTS
- TYPE: time_t
- LOC: Config.digest.rewrite_period
- DEFAULT: 1 hour
- DOC_START
- This is the number of seconds between Cache Digest writes to
- disk.
- DOC_END
-
- NAME: digest_swapout_chunk_size
- COMMENT: (bytes)
- TYPE: b_size_t
- IFDEF: USE_CACHE_DIGESTS
- LOC: Config.digest.swapout_chunk_size
- DEFAULT: 4096 bytes
- DOC_START
- This is the number of bytes of the Cache Digest to write to
- disk at a time. It defaults to 4096 bytes (4KB), the Squid
- default swap page.
- DOC_END
-
- NAME: digest_rebuild_chunk_percentage
- COMMENT: (percent, 0-100)
- IFDEF: USE_CACHE_DIGESTS
- TYPE: int
- LOC: Config.digest.rebuild_chunk_percentage
- DEFAULT: 10
- DOC_START
- This is the percentage of the Cache Digest to be scanned at a
- time. By default it is set to 10% of the Cache Digest.
- DOC_END
-
- NAME: chroot
- TYPE: string
- LOC: Config.chroot_dir
- DEFAULT: none
- DOC_START
- Use this to have Squid do a chroot() while initializing. This
- also causes Squid to fully drop root privileges after
- initializing. This means, for example, that if you use a HTTP
- port less than 1024 and try to reconfigure, you will get an
- error.
- DOC_END
-
- NAME: client_persistent_connections
- TYPE: onoff
- LOC: Config.onoff.client_pconns
- DEFAULT: on
- DOC_NONE
-
- NAME: server_persistent_connections
- TYPE: onoff
- LOC: Config.onoff.server_pconns
- DEFAULT: on
- DOC_START
- Persistent connection support for clients and servers. By
- default, Squid uses persistent connections (when allowed)
- with its clients and servers. You can use these options to
- disable persistent connections with clients and/or servers.
- DOC_END
-
- NAME: pipeline_prefetch
- TYPE: onoff
- LOC: Config.onoff.pipeline_prefetch
- DEFAULT: off
- DOC_START
- To boost the performance of pipelined requests to closer
- match that of a non-proxied environment Squid can try to fetch
- up to two requests in parallell from a pipeline.
-
- Defaults to off for bandwidth management and access logging
- reasons.
- DOC_END
-
- NAME: extension_methods
- TYPE: wordlist
- LOC: Config.ext_methods
- DEFAULT: none
- DOC_START
- Squid only knows about standardized HTTP request methods.
- You can add up to 20 additional "extension" methods here.
- DOC_END
-
- NAME: request_entities
- TYPE: onoff
- LOC: Config.onoff.request_entities
- DEFAULT: off
- DOC_START
- Squid defaults to deny GET and HEAD requests with request entities,
- as the meaning of such requests are undefined in the HTTP standard
- even if not explicitly forbidden.
-
- Set this directive to on if you have clients which insists
- on sending request entities in GET or HEAD requests.
- DOC_END
-
- NAME: high_response_time_warning
- TYPE: int
- COMMENT: (msec)
- LOC: Config.warnings.high_rptm
- DEFAULT: 0
- DOC_START
- If the one-minute median response time exceeds this value,
- Squid prints a WARNING with debug level 0 to get the
- administrators attention. The value is in milliseconds.
- DOC_END
-
- NAME: high_page_fault_warning
- TYPE: int
- LOC: Config.warnings.high_pf
- DEFAULT: 0
- DOC_START
- If the one-minute average page fault rate exceeds this
- value, Squid prints a WARNING with debug level 0 to get
- the administrators attention. The value is in page faults
- per second.
- DOC_END
-
- NAME: high_memory_warning
- TYPE: b_size_t
- LOC: Config.warnings.high_memory
- DEFAULT: 0
- DOC_START
- If the memory usage (as determined by mallinfo) exceeds
- value, Squid prints a WARNING with debug level 0 to get
- the administrators attention.
- DOC_END
-
- NAME: store_dir_select_algorithm
- TYPE: string
- LOC: Config.store_dir_select_algorithm
- DEFAULT: least-load
- DOC_START
- Set this to 'round-robin' as an alternative.
- DOC_END
-
- NAME: forward_log
- IFDEF: WIP_FWD_LOG
- TYPE: string
- DEFAULT: none
- LOC: Config.Log.forward
- DOC_START
- Logs the server-side requests.
-
- This is currently work in progress.
- DOC_END
-
- NAME: ie_refresh
- COMMENT: on|off
- TYPE: onoff
- LOC: Config.onoff.ie_refresh
- DEFAULT: off
- DOC_START
- Microsoft Internet Explorer up until version 5.5 Service
- Pack 1 has an issue with transparent proxies, wherein it
- is impossible to force a refresh. Turning this on provides
- a partial fix to the problem, by causing all IMS-REFRESH
- requests from older IE versions to check the origin server
- for fresh content. This reduces hit ratio by some amount
- (~10% in my experience), but allows users to actually get
- fresh content when they want it. Note that because Squid
- cannot tell if the user is using 5.5 or 5.5SP1, the behavior
- of 5.5 is unchanged from old versions of Squid (i.e. a
- forced refresh is impossible). Newer versions of IE will,
- hopefully, continue to have the new behavior and will be
- handled based on that assumption. This option defaults to
- the old Squid behavior, which is better for hit ratios but
- worse for clients using IE, if they need to be able to
- force fresh content.
- DOC_END
-
- NAME: vary_ignore_expire
- COMMENT: on|off
- TYPE: onoff
- LOC: Config.onoff.vary_ignore_expire
- DEFAULT: off
- DOC_START
- Many HTTP servers supporting Vary gives such objects
- immediate expiry time with no cache-control header
- when requested by a HTTP/1.0 client. This option
- enables Squid to ignore such expiry times until
- HTTP/1.1 is fully implemented.
- WARNING: This may eventually cause some varying
- objects not intended for caching to get cached.
- DOC_END
-
- NAME: sleep_after_fork
- COMMENT: (microseconds)
- TYPE: int
- LOC: Config.sleep_after_fork
- DEFAULT: 0
- DOC_START
- When this is set to a non-zero value, the main Squid process
- sleeps the specified number of microseconds after a fork()
- system call. This sleep may help the situation where your
- system reports fork() failures due to lack of (virtual)
- memory. Note, however, that if you have a lot of child
- processes, then these sleep delays will add up and your
- Squid will not service requests for some amount of time
- until all the child processes have been started.
- DOC_END
-
- EOF
+coredump_dir @DEFAULT_SWAP_DIR@
+NOCOMMENT_END
+DOC_END
+
+NAME: redirector_bypass
+TYPE: onoff
+LOC: Config.onoff.redirector_bypass
+DEFAULT: off
+DOC_START
+ When this is 'on', a request will not go through the
+ redirector if all redirectors are busy. If this is 'off'
+ and the redirector queue grows too large, Squid will exit
+ with a FATAL error and ask you to increase the number of
+ redirectors. You should only enable this if the redirectors
+ are not critical to your caching system. If you use
+ redirectors for access control, and you enable this option,
+ then users may have access to pages that they should not
+ be allowed to request.
+DOC_END
+
+NAME: ignore_unknown_nameservers
+TYPE: onoff
+LOC: Config.onoff.ignore_unknown_nameservers
+DEFAULT: on
+DOC_START
+ By default Squid checks that DNS responses are received
+ from the same IP addresses that they are sent to. If they
+ don't match, Squid ignores the response and writes a warning
+ message to cache.log. You can allow responses from unknown
+ nameservers by setting this option to 'off'.
+DOC_END
+
+NAME: digest_generation
+IFDEF: USE_CACHE_DIGESTS
+TYPE: onoff
+LOC: Config.onoff.digest_generation
+DEFAULT: on
+DOC_START
+ This controls whether the server will generate a Cache Digest
+ of its contents. By default, Cache Digest generation is
+ enabled if Squid is compiled with USE_CACHE_DIGESTS defined.
+DOC_END
+
+NAME: digest_bits_per_entry
+IFDEF: USE_CACHE_DIGESTS
+TYPE: int
+LOC: Config.digest.bits_per_entry
+DEFAULT: 5
+DOC_START
+ This is the number of bits of the server's Cache Digest which
+ will be associated with the Digest entry for a given HTTP
+ Method and URL (public key) combination. The default is 5.
+DOC_END
+
+NAME: digest_rebuild_period
+IFDEF: USE_CACHE_DIGESTS
+COMMENT: (seconds)
+TYPE: time_t
+LOC: Config.digest.rebuild_period
+DEFAULT: 1 hour
+DOC_START
+ This is the number of seconds between Cache Digest rebuilds.
+DOC_END
+
+NAME: digest_rewrite_period
+COMMENT: (seconds)
+IFDEF: USE_CACHE_DIGESTS
+TYPE: time_t
+LOC: Config.digest.rewrite_period
+DEFAULT: 1 hour
+DOC_START
+ This is the number of seconds between Cache Digest writes to
+ disk.
+DOC_END
+
+NAME: digest_swapout_chunk_size
+COMMENT: (bytes)
+TYPE: b_size_t
+IFDEF: USE_CACHE_DIGESTS
+LOC: Config.digest.swapout_chunk_size
+DEFAULT: 4096 bytes
+DOC_START
+ This is the number of bytes of the Cache Digest to write to
+ disk at a time. It defaults to 4096 bytes (4KB), the Squid
+ default swap page.
+DOC_END
+
+NAME: digest_rebuild_chunk_percentage
+COMMENT: (percent, 0-100)
+IFDEF: USE_CACHE_DIGESTS
+TYPE: int
+LOC: Config.digest.rebuild_chunk_percentage
+DEFAULT: 10
+DOC_START
+ This is the percentage of the Cache Digest to be scanned at a
+ time. By default it is set to 10% of the Cache Digest.
+DOC_END
+
+NAME: chroot
+TYPE: string
+LOC: Config.chroot_dir
+DEFAULT: none
+DOC_START
+ Use this to have Squid do a chroot() while initializing. This
+ also causes Squid to fully drop root privileges after
+ initializing. This means, for example, that if you use a HTTP
+ port less than 1024 and try to reconfigure, you will get an
+ error.
+DOC_END
+
+NAME: client_persistent_connections
+TYPE: onoff
+LOC: Config.onoff.client_pconns
+DEFAULT: on
+DOC_NONE
+
+NAME: server_persistent_connections
+TYPE: onoff
+LOC: Config.onoff.server_pconns
+DEFAULT: on
+DOC_START
+ Persistent connection support for clients and servers. By
+ default, Squid uses persistent connections (when allowed)
+ with its clients and servers. You can use these options to
+ disable persistent connections with clients and/or servers.
+DOC_END
+
+NAME: pipeline_prefetch
+TYPE: onoff
+LOC: Config.onoff.pipeline_prefetch
+DEFAULT: off
+DOC_START
+ To boost the performance of pipelined requests to closer
+ match that of a non-proxied environment Squid can try to fetch
+ up to two requests in parallell from a pipeline.
+
+ Defaults to off for bandwidth management and access logging
+ reasons.
+DOC_END
+
+NAME: extension_methods
+TYPE: wordlist
+LOC: Config.ext_methods
+DEFAULT: none
+DOC_START
+ Squid only knows about standardized HTTP request methods.
+ You can add up to 20 additional "extension" methods here.
+DOC_END
+
+NAME: request_entities
+TYPE: onoff
+LOC: Config.onoff.request_entities
+DEFAULT: off
+DOC_START
+ Squid defaults to deny GET and HEAD requests with request entities,
+ as the meaning of such requests are undefined in the HTTP standard
+ even if not explicitly forbidden.
+
+ Set this directive to on if you have clients which insists
+ on sending request entities in GET or HEAD requests.
+DOC_END
+
+NAME: high_response_time_warning
+TYPE: int
+COMMENT: (msec)
+LOC: Config.warnings.high_rptm
+DEFAULT: 0
+DOC_START
+ If the one-minute median response time exceeds this value,
+ Squid prints a WARNING with debug level 0 to get the
+ administrators attention. The value is in milliseconds.
+DOC_END
+
+NAME: high_page_fault_warning
+TYPE: int
+LOC: Config.warnings.high_pf
+DEFAULT: 0
+DOC_START
+ If the one-minute average page fault rate exceeds this
+ value, Squid prints a WARNING with debug level 0 to get
+ the administrators attention. The value is in page faults
+ per second.
+DOC_END
+
+NAME: high_memory_warning
+TYPE: b_size_t
+LOC: Config.warnings.high_memory
+DEFAULT: 0
+DOC_START
+ If the memory usage (as determined by mallinfo) exceeds
+ value, Squid prints a WARNING with debug level 0 to get
+ the administrators attention.
+DOC_END
+
+NAME: store_dir_select_algorithm
+TYPE: string
+LOC: Config.store_dir_select_algorithm
+DEFAULT: least-load
+DOC_START
+ Set this to 'round-robin' as an alternative.
+DOC_END
+
+NAME: forward_log
+IFDEF: WIP_FWD_LOG
+TYPE: string
+DEFAULT: none
+LOC: Config.Log.forward
+DOC_START
+ Logs the server-side requests.
+
+ This is currently work in progress.
+DOC_END
+
+NAME: ie_refresh
+COMMENT: on|off
+TYPE: onoff
+LOC: Config.onoff.ie_refresh
+DEFAULT: off
+DOC_START
+ Microsoft Internet Explorer up until version 5.5 Service
+ Pack 1 has an issue with transparent proxies, wherein it
+ is impossible to force a refresh. Turning this on provides
+ a partial fix to the problem, by causing all IMS-REFRESH
+ requests from older IE versions to check the origin server
+ for fresh content. This reduces hit ratio by some amount
+ (~10% in my experience), but allows users to actually get
+ fresh content when they want it. Note that because Squid
+ cannot tell if the user is using 5.5 or 5.5SP1, the behavior
+ of 5.5 is unchanged from old versions of Squid (i.e. a
+ forced refresh is impossible). Newer versions of IE will,
+ hopefully, continue to have the new behavior and will be
+ handled based on that assumption. This option defaults to
+ the old Squid behavior, which is better for hit ratios but
+ worse for clients using IE, if they need to be able to
+ force fresh content.
+DOC_END
+
+NAME: vary_ignore_expire
+COMMENT: on|off
+TYPE: onoff
+LOC: Config.onoff.vary_ignore_expire
+DEFAULT: off
+DOC_START
+ Many HTTP servers supporting Vary gives such objects
+ immediate expiry time with no cache-control header
+ when requested by a HTTP/1.0 client. This option
+ enables Squid to ignore such expiry times until
+ HTTP/1.1 is fully implemented.
+ WARNING: This may eventually cause some varying
+ objects not intended for caching to get cached.
+DOC_END
+
+NAME: sleep_after_fork
+COMMENT: (microseconds)
+TYPE: int
+LOC: Config.sleep_after_fork
+DEFAULT: 0
+DOC_START
+ When this is set to a non-zero value, the main Squid process
+ sleeps the specified number of microseconds after a fork()
+ system call. This sleep may help the situation where your
+ system reports fork() failures due to lack of (virtual)
+ memory. Note, however, that if you have a lot of child
+ processes, then these sleep delays will add up and your
+ Squid will not service requests for some amount of time
+ until all the child processes have been started.
+DOC_END
+
+EOF
projects / thirdparty / squid.git / commitdiff
