zentyal-squid 2.3.11+quantal1 / usr / share / zentyal / stubs / squid / dansguardian.conf.mas

<%args>
    $port
    $lang
    $squidport
    $weightedPhraseThreshold

    $nGroups

    $antivirus => 1

    $maxchildren
    $minchildren
    $minsparechildren
    $preforkchildren
    $maxsparechildren
    $maxagechildren
</%args>

# Web Access Denied Reporting (does not affect logging)
#
# -1 = log, but do not block - Stealth mode
#  0 = just say 'Access Denied'
#  1 = report why but not what denied phrase
#  2 = report fully
#  3 = use HTML template file (accessdeniedaddress ignored) - recommended
#
reportinglevel = 3

# Language dir where languages are stored for internationalisation.
# The HTML template within this dir is only used when reportinglevel
# is set to 3. When used, DansGuardian will display the HTML file instead of
# using the perl cgi script.  This option is faster, cleaner
# and easier to customise the access denied page.
# The language file is used no matter what setting however.
#
languagedir = '/etc/dansguardian/languages'

# language to use from languagedir.
language = <% $lang %>

# Logging Settings
#
# 0 = none  1 = just denied  2 = all text based  3 = all requests
loglevel = 3

# Log Exception Hits
# Log if an exception (user, ip, URL, phrase) is matched and so
# the page gets let through.  Can be useful for diagnosing
# why a site gets through the filter.
# 0 = never log exceptions
# 1 = log exceptions, but do not explicitly mark them as such
# 2 = always log & mark exceptions (default)
logexceptionhits = 1

# Log File Format
# 1 = DansGuardian format (space delimited)
# 2 = CSV-style format
# 3 = Squid Log File Format
# 4 = Tab delimited
logfileformat = 3

# truncate large items in log lines
#maxlogitemlength = 400

# anonymize logs (blank out usernames & IPs)
#anonymizelogs = on


# Syslog logging
#
# Use syslog for access logging instead of logging to the file
# at the defined or built-in "loglocation"
#syslog = on

# Log file location
#
# Defines the log directory and filename.
loglocation = '/var/log/dansguardian/access.log'


# Statistics log file location
#
# Defines the stat file directory and filename.
# Only used in conjunction with maxips > 0
# Once every 3 minutes, the current number of IPs in the cache, and the most
# that have been in the cache since the daemon was started, are written to this
# file. IPs persist in the cache for 7 days.
#statlocation = '/var/log/dansguardian/stats'

# Network Settings
#
# the IP that DansGuardian listens on.  If left blank DansGuardian will
# listen on all IPs.  That would include all NICs, loopback, modem, etc.
# Normally you would have your firewall protecting this, but if you want
# you can limit it to a certain IP. To bind to multiple interfaces,
# specify each IP on an individual filterip line.
filterip =

# the port that DansGuardian listens to.
filterport = <% $port %>

# the ip of the proxy (default is the loopback - i.e. this server)
proxyip = 127.0.0.1

# the port DansGuardian connects to proxy on
proxyport = <% $squidport %>

# accessdeniedaddress is the address of your web server to which the cgi
# dansguardian reporting script was copied. Only used in reporting levels 1 and 2.
#
# This webserver must be either:
#  1. Non-proxied. Either a machine on the local network, or listed as an exception
#     in your browser's proxy configuration.
#  2. Added to the exceptionsitelist. Option 1 is preferable; this option is
#     only for users using both transparent proxying and a non-local server
#     to host this script.
#
# Individual filter groups can override this setting in their own configuration.
#
accessdeniedaddress = 'http://YOURSERVER.YOURDOMAIN/cgi-bin/dansguardian.pl'

# Non standard delimiter (only used with accessdeniedaddress)
# To help preserve the full banned URL, including parameters, the variables
# passed into the access denied CGI are separated using non-standard
# delimiters. This can be useful to ensure correct operation of the filter
# bypass modes. Parameters are split using "::" in place of "&", and "==" in
# place of "=".
# Default is enabled, but to go back to the standard mode, disable it.
nonstandarddelimiter = on

# Banned image replacement
# Images that are banned due to domain/url/etc reasons including those
# in the adverts blacklists can be replaced by an image.  This will,
# for example, hide images from advert sites and remove broken image
# icons from banned domains.
# on (default) | off
usecustombannedimage = on
custombannedimagefile = '/usr/share/dansguardian/transparent1x1.gif'

# Filter groups options
# filtergroups sets the number of filter groups. A filter group is a set of content
# filtering options you can apply to a group of users.  The value must be 1 or more.
# DansGuardian will automatically look for dansguardianfN.conf where N is the filter
# group.  To assign users to groups use the filtergroupslist option.  All users default
# to filter group 1.  You must have some sort of authentication to be able to map users
# to a group.  The more filter groups the more copies of the lists will be in RAM so
# use as few as possible.
filtergroups = <% $nGroups %>
filtergroupslist = '/etc/dansguardian/lists/filtergroupslist'

# Authentication files location
bannediplist = '/etc/dansguardian/lists/bannediplist'
exceptioniplist = '/etc/dansguardian/lists/exceptioniplist'

# Show weighted phrases found
# If enabled then the phrases found that made up the total which excedes
# the naughtyness limit will be logged and, if the reporting level is
# high enough, reported. on | off
showweightedfound = on

# Weighted phrase mode
# There are 3 possible modes of operation:
# 0 = off = do not use the weighted phrase feature.
# 1 = on, normal = normal weighted phrase operation.
# 2 = on, singular = each weighted phrase found only counts once on a page.
#
weightedphrasemode = <% $weightedPhraseThreshold ? 2 : 0 %>

# Positive (clean) result caching for URLs
# Caches good pages so they don't need to be scanned again.
# It also works with AV plugins.
# 0 = off (recommended for ISPs with users with disimilar browsing)
# 1000 = recommended for most users
# 5000 = suggested max upper limit
# If you're using an AV plugin then use at least 5000.
urlcachenumber = 1000
#
# Age before they are stale and should be ignored in seconds
# 0 = never
# 900 = recommended = 15 mins
urlcacheage = 900



# Clean cache for content (AV) scan results
# By default, to save CPU, files scanned and found to be
# clean are inserted into the clean cache and NOT scanned
# again for a while.  If you don't like this then choose
# to disable it.
# (on|off) default = on.
scancleancache = on



# Smart, Raw and Meta/Title phrase content filtering options
# Smart is where the multiple spaces and HTML are removed before phrase filtering
# Raw is where the raw HTML including meta tags are phrase filtered
# Meta/Title is where only meta and title tags are phrase filtered (v. quick)
# CPU usage can be effectively halved by using setting 0 or 1 compared to 2
# 0 = raw only
# 1 = smart only
# 2 = both of the above (default)
# 3 = meta/title
phrasefiltermode = 2

# Lower casing options
# When a document is scanned the uppercase letters are converted to lower case
# in order to compare them with the phrases.  However this can break Big5 and
# other 16-bit texts.  If needed preserve the case.  As of version 2.7.0 accented
# characters are supported.
# 0 = force lower case (default)
# 1 = do not change case
# 2 = scan first in lower case, then in original case
preservecase = 0

# Note:
# If phrasefiltermode and preserve case are both 2, this equates to 4 phrase
# filtering passes. If you have a large enough userbase for this to be a
# worry, and need to filter pages in exotic character encodings, it may be
# better to run two instances on separate servers: one with preservecase 1
# (and possibly forcequicksearch 1) and non ASCII/UTF-8 phrase lists, and one
# with preservecase 0 and ASCII/UTF-8 lists.



# Hex decoding options
# When a document is scanned it can optionally convert %XX to chars.
# If you find documents are getting past the phrase filtering due to encoding
# then enable.  However this can break Big5 and other 16-bit texts.
# off = disabled (default)
# on = enabled
hexdecodecontent = off

# Force Quick Search rather than DFA search algorithm
# The current DFA implementation is not totally 16-bit character compatible
# but is used by default as it handles large phrase lists much faster.
# If you wish to use a large number of 16-bit character phrases then
# enable this option.
# off (default) | on (Big5 compatible)
forcequicksearch = off



# Reverse lookups for banned site and URLs.
# If set to on, DansGuardian will look up the forward DNS for an IP URL
# address and search for both in the banned site and URL lists.  This would
# prevent a user from simply entering the IP for a banned address.
# It will reduce searching speed somewhat so unless you have a local caching
# DNS server, leave it off and use the Blanket IP Block option in the
# bannedsitelist file instead.
reverseaddresslookups = off



# Reverse lookups for banned and exception IP lists.
# If set to on, DansGuardian will look up the forward DNS for the IP
# of the connecting computer.  This means you can put in hostnames in
# the exceptioniplist and bannediplist.
# If a client computer is matched against an IP given in the lists, then the
# IP will be recorded in any log entries; if forward DNS is successful and a
# match occurs against a hostname, the hostname will be logged instead.
# It will reduce searching speed somewhat so unless you have a local DNS server,
# leave it off.
reverseclientiplookups = off


# Perform reverse lookups on client IPs for successful requests.
# If set to on, DansGuardian will look up the forward DNS for the IP
# of the connecting computer, and log host names (where available) rather than
# IPs against requests.
# This is not dependent on reverseclientiplookups being enabled; however, if it
# is, enabling this option does not incur any additional forward DNS requests.
logclienthostnames = off


# Build bannedsitelist and bannedurllist cache files.
# This will compare the date stamp of the list file with the date stamp of
# the cache file and will recreate as needed.
# If a bsl or bul .processed file exists, then that will be used instead.
# It will increase process start speed by 300%.  On slow computers this will
# be significant.  Fast computers do not need this option. on | off
createlistcachefiles = on

# POST protection (web upload and forms)
# does not block forms without any file upload, i.e. this is just for
# blocking or limiting uploads
# measured in kibibytes after MIME encoding and header bumph
# use 0 for a complete block
# use higher (e.g. 512 = 512Kbytes) for limiting
# use -1 for no blocking
#maxuploadsize = 512
#maxuploadsize = 0
maxuploadsize = -1

# Max content filter size
# Sometimes web servers label binary files as text which can be very
# large which causes a huge drain on memory and cpu resources.
# To counter this, you can limit the size of the document to be
# filtered and get it to just pass it straight through.
# This setting also applies to content regular expression modification.
# The value must not be higher than maxcontentramcachescansize
# The size is in Kibibytes - eg 2048 = 2Mb
# use 0 to set it to maxcontentramcachescansize
maxcontentfiltersize = 256

# Max content ram cache scan size
# This is only used if you use a content scanner plugin such as AV
# This is the max size of file that DG will download and cache
# in RAM.  After this limit is reached it will cache to disk
# This value must be less than or equal to maxcontentfilecachescansize.
# The size is in Kibibytes - eg 10240 = 10Mb
# use 0 to set it to maxcontentfilecachescansize
# This option may be ignored by the configured download manager.
maxcontentramcachescansize = 2000

# Max content file cache scan size
# This is only used if you use a content scanner plugin such as AV
# This is the max size file that DG will download
# so that it can be scanned or virus checked.
# This value must be greater or equal to maxcontentramcachescansize.
# The size is in Kibibytes - eg 10240 = 10Mb
maxcontentfilecachescansize = 20000



# File cache dir
# Where DG will download files to be scanned if too large for the
# RAM cache.
filecachedir = '/tmp'

# Delete file cache after user completes download
# When a file gets save to temp it stays there until it is deleted.
# You can choose to have the file deleted when the user makes a sucessful
# download.  This will mean if they click on the link to download from
# the temp store a second time it will give a 404 error.
# You should configure something to delete old files in temp to stop it filling up.
# on|off (defaults to on)
deletedownloadedtempfiles = on

# Initial Trickle delay
# This is the number of seconds a browser connection is left waiting
# before first being sent *something* to keep it alive.  The
# *something* depends on the download manager chosen.
# Do not choose a value too low or normal web pages will be affected.
# A value between 20 and 110 would be sensible
# This may be ignored by the configured download manager.
initialtrickledelay = 20

# Trickle delay
# This is the number of seconds a browser connection is left waiting
# before being sent more *something* to keep it alive.  The
# *something* depends on the download manager chosen.
# This may be ignored by the configured download manager.
trickledelay = 10

# Download Managers
# These handle downloads of files to be filtered and scanned.
# They differ in the method they deal with large downloads.
# Files usually need to be downloaded 100% before they can be
# filtered and scanned before being sent on to the browser.
# Normally the browser can just wait, but with content scanning,
# for example to AV, the browser may timeout or the user may get
# confused so the download manager has to do some sort of
# 'keep alive'.
#
# There are various methods possible but not all are included.
# The author does not have the time to write them all so I have
# included a plugin systam.  Also, not all methods work with all
# browsers and clients.  Specifically some fancy methods don't
# work with software that downloads updates.  To solve this,
# each plugin can support a regular expression for matching
# the client's user-agent string, and lists of the mime types
# and extensions it should manage.
#
# Note that these are the matching methods provided by the base plugin
# code, and individual plugins may override or add to them.
# See the individual plugin conf files for supported options.
#
# The plugins are matched in the order you specify and the last
# one is forced to match as the default, regardless of user agent
# and other matching mechanisms.
#
downloadmanager = '/etc/dansguardian/downloadmanagers/fancy.conf'
#downloadmanager = '/etc/dansguardian/downloadmanagers/trickle.conf'
downloadmanager = '/etc/dansguardian/downloadmanagers/default.conf'

# Content Scanners (Also known as AV scanners)
# These are plugins that scan the content of all files your browser fetches
# for example to AV scan.  The options are limitless.  Eventually all of
# DansGuardian will be plugin based.  You can have more than one content
# scanner. The plugins are run in the order you specify.
# This is one of the few places you can have multiple options of the same name.
#
# Some of the scanner(s) require 3rd party software and libraries eg clamav.
# See the individual plugin conf file for more options (if any).
#
% if ($antivirus) {
contentscanner = '/etc/dansguardian/contentscanners/clamdscan.conf'
% }

# Content scanner timeout
# Some of the content scanners support using a timeout value to stop
# processing (eg AV scanning) the file if it takes too long.
# If supported this will be used.
# The default of 60 seconds is probably reasonable.
contentscannertimeout = 60

# Content scan exceptions
# If 'on' exception sites, urls, users etc will be scanned
# This is probably not desirable behavour as exceptions are
# supposed to be trusted and will increase load.
# Correct use of grey lists are a better idea.
# (on|off) default = off
contentscanexceptions = off

# Auth plugins
# These replace the usernameidmethod* options in previous versions. They
# handle the extraction of client usernames from various sources, such as
# Proxy-Authorisation headers and ident servers, enabling requests to be
# handled according to the settings of the user's filter group.
# Multiple plugins can be specified, and will be queried in order until one
# of them either finds a username or throws an error. For example, if Squid
# is configured with both NTLM and Basic auth enabled, and both the 'proxy-basic'
# and 'proxy-ntlm' auth plugins are enabled here, then clients which do not support
# NTLM can fall back to Basic without sacrificing access rights.
#
# If you do not use multiple filter groups, you need not specify this option.
#
authplugin = '/etc/dansguardian/authplugins/proxy-basic.conf'
#authplugin = '/etc/dansguardian/authplugins/proxy-digest.conf'
#authplugin = '/etc/dansguardian/authplugins/proxy-ntlm.conf'
#authplugin = '/etc/dansguardian/authplugins/ident.conf'
authplugin = '/etc/dansguardian/authplugins/ip.conf'



# Re-check replaced URLs
# As a matter of course, URLs undergo regular expression search/replace (urlregexplist)
# *after* checking the exception site/URL/regexpURL lists, but *before* checking against
# the banned site/URL lists, allowing certain requests that would be matched against the
# latter in their original state to effectively be converted into grey requests.
# With this option enabled, the exception site/URL/regexpURL lists are also re-checked
# after replacement, making it possible for URL replacement to trigger exceptions based
# on them.
# Defaults to off.
recheckreplacedurls = off



# Misc settings

# if on it adds an X-Forwarded-For: <clientip> to the HTTP request
# header.  This may help solve some problem sites that need to know the
# source ip. on | off
forwardedfor = off


# if on it uses the X-Forwarded-For: <clientip> to determine the client
# IP. This is for when you have squid between the clients and DansGuardian.
# Warning - headers are easily spoofed. on | off

usexforwardedfor = off

# if on it logs some debug info regarding fork()ing and accept()ing which
# can usually be ignored.  These are logged by syslog.  It is safe to leave
# it on or off
logconnectionhandlingerrors = off




# Fork pool options

# If on, this causes DG to write to the log file whenever child processes are
# created or destroyed (other than by crashes). This information can help in
# understanding and tuning the following parameters, but is not generally
# useful in production.
logchildprocesshandling = off

# sets the maximum number of processes to spawn to handle the incoming
# connections.  Max value usually 250 depending on OS.
# On large sites you might want to try 180.
maxchildren = <% $maxchildren %>

# sets the minimum number of processes to spawn to handle the incoming connections.
# On large sites you might want to try 32.
minchildren = <% $minchildren %>

minsparechildren = <% $minsparechildren %>

# sets the minimum number of processes to spawn when it runs out
# On large sites you might want to try 10.
preforkchildren = <% $preforkchildren %>

# sets the maximum number of processes to have doing nothing.
# When this many are spare it will cull some of them.
# On large sites you might want to try 64.
maxsparechildren = <% $maxsparechildren %>

# sets the maximum age of a child process before it croaks it.
# This is the number of connections they handle before exiting.
# On large sites you might want to try 10000.
maxagechildren = <% $maxagechildren %>

# Sets the maximum number client IP addresses allowed to connect at once.
# Use this to set a hard limit on the number of users allowed to concurrently
# browse the web. Set to 0 for no limit, and to disable the IP cache process.
maxips = 0

# Process options
# (Change these only if you really know what you are doing).
# These options allow you to run multiple instances of DansGuardian on a single machine.
# Remember to edit the log file path above also if that is your intention.

# IPC filename
#
# Defines IPC server directory and filename used to communicate with the log process.
ipcfilename = '/tmp/.dguardianipc'
# URL list IPC filename
#
# Defines URL list IPC server directory and filename used to communicate with the URL
# cache process.
urlipcfilename = '/tmp/.dguardianurlipc'

# IP list IPC filename
#
# Defines IP list IPC server directory and filename, for communicating with the client
# IP cache process.
ipipcfilename = '/tmp/.dguardianipipc'

# PID filename
#
# Defines process id directory and filename.
#pidfilename = '/var/run/dansguardian.pid'

# Disable daemoning
# If enabled the process will not fork into the background.
# It is not usually advantageous to do this.
# on|off (defaults to off)
nodaemon = off

# Disable logging process
# on|off (defaults to off)
nologger = off

# Enable logging of "ADs" category blocks
# on|off (defaults to off)
logadblocks = off

# Enable logging of client User-Agent
# Some browsers will cause a *lot* of extra information on each line!
# on|off (defaults to off)
loguseragent = off

# Daemon runas user and group
# This is the user that DansGuardian runs as.  Normally the user/group nobody.
# Uncomment to use.  Defaults to the user set at compile time.
# Temp files created during virus scanning are given owner and group read
# permissions; to use content scanners based on external processes, such as
# clamdscan, the two processes must run with either the same group or user ID.
#daemonuser = 'nobody'
#daemongroup = 'nobody'

# Soft restart
# When on this disables the forced killing off all processes in the process group.
# This is not to be confused with the -g run time option - they are not related.
# on|off (defaults to off)
softrestart = off