Don't try to remove memory-only objects from the disk during cache_dir rebuild

[thirdparty/squid.git] / src / cf.data.pre

#
# $Id: cf.data.pre,v 1.214 2001/02/10 16:40:40 hno Exp $
#
#
# SQUID Web Proxy Cache          http://www.squid-cache.org/
# ----------------------------------------------------------
#
#  Squid is the result of efforts by numerous individuals from
#  the Internet community; see the CONTRIBUTORS file for full
#  details.   Many organizations have provided support for Squid's
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#  Copyrighted (C) 2000 by the Regents of the University of
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#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
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#  
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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#  You should have received a copy of the GNU General Public License
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#

COMMENT_START
	WELCOME TO SQUID 2
	------------------

	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.

	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
TYPE: sockaddr_in_list
DEFAULT: none
DEFAULT_IF_NONE: 3128
LOC: Config.Sockaddr.http
DOC_START
	Usage:	port
		hostname:port
		1.2.3.4:port

	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.

	The default port number is 3128.

	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.
DOC_END


NAME: icp_port udp_port
TYPE: ushort
DEFAULT: 3130
LOC: Config.Port.icp
DOC_START
	The port number where Squid sends and receives ICP queries to
	and from neighbor caches.  Default is 3130.  To disable use
	"0".  May be overridden with -u on the command line.
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".

	To enable this option, you must use --enable-htcp with the
	configure script.
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: tcp_outgoing_address outbound_address
TYPE: address
LOC: Config.Addrs.tcp_outgoing
DEFAULT: 255.255.255.255
DOC_NONE

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
	Usage: tcp_incoming_address 10.20.30.40
	       udp_outgoing_address fully.qualified.domain.name

	tcp_outgoing_address	is used for connections made to remote
				servers and other caches.
	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 *_incoming_address value of 0.0.0.0 indicates that Squid should
	listen 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.

	NOTE, tcp_incoming_address has been removed.  You can now
	specify IP addresses on the 'http_port' line.
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

	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
		     ttl=n
		     no-query
		     default
		     round-robin
		     multicast-responder
		     closest-only
		     no-digest
		     no-netdb-exchange
		     no-delay
		     login=user:password | PASS | *:password
		     connect-timeout=nn
		     digest-url=url
		     allow-miss

		     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 '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 '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.

		     '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. 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 parent. 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)

	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: 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


NAME: no_cache
TYPE: acl_access
DEFAULT: none
LOC: Config.accessList.noCache
DOC_START
	A list of ACL elements which, if matched, cause the reply to
	immediately removed from the cache.  In other words, use this
	to force certain objects to never be cached.

	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


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 PLACES A LIMIT ON ONE ASPECT OF SQUID'S MEMORY
	USAGE.  SQUID USES MEMORY FOR OTHER THINGS AS WELL.
	YOUR PROCESS WILL PROBABLY BECOME TWICE OR THREE TIMES
	BIGGER THAN THE VALUE YOU PUT HERE 

	'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]

	You can specify multiple cache_dir lines to spread the
	cache among different disk partitions.

	Type specifies the kind of storage system to use.  Most
	everyone will want to use "ufs" as the type.  If you are using
	Async I/O (--enable async-io) on Linux or Solaris, then you may
	want to try "aufs" as the type.  Async IO support may be
	buggy, however, so beware.

	'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.

	'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: 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.

	Example: dns_nameservers 10.0.0.1 192.172.0.4
DOC_END

NAME: hosts_file
TYPE: string
DEFAULT: /etc/hosts
LOC: Config.etcHostsPath
DOC_START
	Location of the host-local IP name-address associations
	database.  Most Operating Systems have such a file: under
	Un*X it's by default in /etc/hosts MS-Windows NT/2000 places
	that in %SystemRoot%(by default
	c:\winnt)\system32\drivers\etc\hosts, while Windows 9x/ME
	places that in %windir%(usually c:\windows)\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: 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.
	This is only useful if you configured Squid (during compilation)
	with the '--enable-icmp' option.
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 Release-Notes 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 a accelerator then this may
	not be a wanted effect of a redirector.
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.authConfig
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
	authenticate_program is not used.

	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). Their 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 a one-time password system (such as SecureID).
	If you are using such a system, you will be vulnerable to replay attacks
	unless you also enable the IP ttl is strict option.

	=== 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 a 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.

	=== 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 digest realm Squid proxy-caching web server
#auth_param digest nonce_garbage_interval 5 minutes
#auth_param digest nonce_max_duration 30 minutes
#auth_param digest nonce_max_count 50
#auth_param ntlm program <uncomment and complete this line to activate>
#auth_param ntlm 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
	With this option you control how long a proxy authentication
	will be bound to a specific IP address. If a request using
	the same user name is received during this time then access
	will be denied and both users are required to reauthenticate
	them selves.  The idea behind this is to make it annoying
	for people to share their password to their friends, but
	yet allow a dialup user to reconnect on a different dialup
	port.

	The default is 0 to disable the check. Recommended value
	if you have dialup users are no more than 60 seconds to allow
	the user to redial without hassle. If all your users are
	stationary then higher values may be used.

	See also authenticate_ip_ttl_is_strict
DOC_END

NAME: authenticate_ip_ttl_is_strict
TYPE: onoff
LOC: Config.onoff.authenticateIpTTLStrict
DEFAULT: on
DOC_START
	This option makes authenticate_ip_ttl a bit stricter. With this
	enabled authenticate_ip_ttl will deny all access from other IP
	addresses until the TTL has expired, and the IP address "owning"
	the userid will not be forced to reauthenticate.
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: 1 MB
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, there will be no limit
	imposed.
DOC_END

NAME: reply_body_max_size
COMMENT: (KB)
TYPE: b_size_t
DEFAULT: 0
LOC: Config.maxReplyBodySize
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.   The reply size is 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 this parameter, 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.

	NOTE: 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.

	If you set this parameter to zero (the default), there will be
	no limit imposed.
DOC_END


NAME: refresh_pattern
TYPE: refreshpattern
LOC: Config.Refresh
DEFAULT: none
DEFAULT_IF_NONE:	^ftp:		1440	20%	10080
DEFAULT_IF_NONE:	^gopher:	1440	0%	1440
DEFAULT_IF_NONE: 	.		0	20%	4320
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: overrsde-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.
		
	Please see the file doc/Release-Notes-1.1.txt for a full
	description of Squid's refresh algorithm.  Basically a
	cached object is: (the order is changed from 1.1.X)

		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.
DOC_END

NAME: reference_age
TYPE: time_t
LOC: Config.referenceAge
DEFAULT: 1 year
DOC_START
	As a part of normal operation, Squid performs Least Recently
	Used removal of cached objects.  The LRU age for removal is
	computed dynamically, based on the amount of disk space in
	use.  The dynamic value can be seen in the Cache Manager 'info'
	output.

	The 'reference_age' parameter defines the maximum LRU age.  For
	example, setting reference_age to '1 week' will cause objects
	to be removed if they have not been accessed for a week or
	more.  The default value is one year.

	Specify a number here, followed by units of time.  For example:
		1 week
		3.5 days
		4 months
		2.2 hours

	NOTE: this parameter is not used when using the enhanced
	replacement policies, GDSH or LFUDA.
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 can be configured to continue downloading aborted
	requests.  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.  Setting 'quick_abort_min' to -1
	will disable the quick_abort feature.

	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.
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: siteselect_timeout
COMMENT: time-units
TYPE: time_t
LOC: Config.Timeout.siteSelect
DEFAULT: 4 seconds
DOC_START
	For URN to multiple URL's URL selection
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: 30 seconds
DOC_START
	How long to wait for an HTTP request after connection
	establishment.  For persistent connections, wait this long
	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, pconn_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 requests.  If this is too high,
	and you enabled 'ident_lookup', then you might be susceptible
	to denial-of-service by having many ident requests going at
	once.

	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.

	This option may be disabled by using --disable-ident with
	the configure script.
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 src dst srcdomain dstdomain url_pattern
		urlpath_pattern time port proto method browser user

	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 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 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
	  # needed during ACL checking the username is NOT logged
	  # in access.log.
	  #
	  # NOTE: proxy_auth requires a EXTERNAL authentication program
	  # to check username/password combinations (see
	  # authenticate_program).
	  #
	  # WARNING: proxy_auth can't be used in a transparent proxy. It
	  # collides with any authentication done by origin servers. It may
	  # seem like it works at first, but it doesn't.

	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
	  # more than <number> HTTP connections established.

	acl 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 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.


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
#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 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
# Deny requests to unknown ports
http_access deny !Safe_ports
# Deny CONNECT to other than SSL ports
http_access deny CONNECT !SSL_ports
#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
# And finally deny all other access to this proxy
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.

        http_reply_access allow|deny [!] aclname ...

        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.

NOCOMMENT_START
#Recommended minimum configuration:
#
# Insert your own rules here.
#
#
# and finally allow by default
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

	icp_access  allow|deny [!]aclname ...

	See http_access for details

NOCOMMENT_START
#Allow ICP queries from eveyone
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:

		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.

	By default, allow all clients who passed the http_access rules
	to fetch MISSES from us.

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

	This option may be disabled by using --disable-ident with
	the configure script.
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 the cache is run 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 and GID to the default group of nobody.

	If Squid is not started as root, the default is to keep the
	current UID/GID, and only the GID can be changed to any of
	the groups the user starting Squid is 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

COMMENT_START
 HTTPD-ACCELERATOR OPTIONS
 -----------------------------------------------------------------------------
COMMENT_END

NAME: httpd_accel_host
TYPE: string
LOC: Config.Accel.host
DEFAULT: none
DOC_NONE

NAME: httpd_accel_port
TYPE: ushort
LOC: Config.Accel.port
DEFAULT: 80
DOC_START
	If you want to run Squid as an httpd accelerator, define the
	host name and port number where the real HTTP server is.

	If you want virtual host support then specify the hostname
	as "virtual".

	If you want virtual port support then specify the port as "0".

	NOTE: enabling httpd_accel_host disables proxy-caching and
	ICP.  If you want these features enabled also, then set
	the 'httpd_accel_with_proxy' option.
DOC_END

NAME: httpd_accel_single_host
COMMENT: on|off
TYPE: onoff
LOC: Config.Accel.single_host
DEFAULT: off
DOC_START
	If you are running Squid as a accelerator and have a single backend
	server then set this to on. This causes Squid to forward the request
	to this server irregardles of what any redirectors or Host headers
	says.

	Leave this at off if you have multiple backend servers, and use a
	redirector (or host table or private DNS) to map the requests to the
	appropriate backend servers. Note that the mapping needs to be a
	1-1 mapping between requested and backend (from redirector) domain
	names or caching will fail, as cacing is performed using the
	URL returned from the redirector.

	See also redirect_rewrites_host_header.
DOC_END

NAME: httpd_accel_with_proxy
COMMENT: on|off
TYPE: onoff
DEFAULT: off
LOC: Config.onoff.accel_with_proxy
DOC_START
	If you want to use Squid as both a local httpd accelerator
	and as a proxy, change this to 'on'. Note however that your
	proxy users may have trouble to reach the accelerated domains
	unless their browsers are configured not to use this proxy for
	those domains (for example via the no_proxy browser configuration
	setting)
DOC_END

NAME: httpd_accel_uses_host_header
COMMENT: on|off
TYPE: onoff
DEFAULT: off
LOC: opt_accel_uses_host
DOC_START
	HTTP/1.1 requests include a Host: header which is basically the
	hostname from the URL.  Squid can be an accelerator for
	different HTTP servers by looking at this header.  However,
	Squid does NOT check the value of the Host header, so it opens
	a big security hole.  We recommend that this option remain
	disabled unless you are sure of what you are doing.

	However, you will need to enable this option if you run Squid
	as a transparent proxy.  Otherwise, virtual servers which
	require the Host: header will not be properly cached.
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.

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: deny_info
TYPE: denyinfo
LOC: Config.denyInfoList
DEFAULT: none
DOC_START
	Usage:   deny_info err_page_name 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.
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: 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'.
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
		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
	Some log files (cache.log, useragent.log) are written with
	stdio functions, and as such they can be buffered or
	unbuffered.  By default they will be unbuffered. Buffering them
	can speed up the writing slightly (though you are unlikely to
	need to worry).
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.

	This option may be disabled by using --disable-http-violations
	with the configure script.
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
TYPE: http_header_access[]
LOC: Config.header_access
DEFAULT: none
DOC_START
	Usage: header_access header_name allow|deny [!]aclname ...
  
	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 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 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
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".

	NOTE: SNMP support requires use the --enable-snmp configure
	command line option.
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.

	To enable this option, you must use --enable-delay-pools with the
	configure script.
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 2      # 2 delay pools
 delay_class 1 2    # pool 1 is a class 2 pool
 delay_class 2 3    # pool 2 is a class 3 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.

	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
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

	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).

	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 600/64000

	There must be one delay_parameters line for each delay pool.
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
	a extra CRLF pair after the body of a PUT/POST request.

	Some HTTP servers has broken implementations of PUT/POST,
	and rely on a 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 off.

	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: 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: 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

EOF