-# Sample Configuration File for Privoxy 3.0.23
-#
-# $Id: p-config.sgml,v 2.112 2014/11/28 14:26:35 fabiankeil Exp $
-#
-# Copyright (C) 2001-2014 Privoxy Developers http://www.privoxy.org/
-#
-####################################################################
-# #
-# Table of Contents #
-# #
-# I. INTRODUCTION #
-# II. FORMAT OF THE CONFIGURATION FILE #
-# #
-# 1. LOCAL SET-UP DOCUMENTATION #
-# 2. CONFIGURATION AND LOG FILE LOCATIONS #
-# 3. DEBUGGING #
-# 4. ACCESS CONTROL AND SECURITY #
-# 5. FORWARDING #
-# 6. MISCELLANEOUS #
-# 7. WINDOWS GUI OPTIONS #
-# #
-####################################################################
+# Sample Configuration File for Privoxy 3.0.27
+#
+# Copyright (C) 2001-2018 Privoxy Developers https://www.privoxy.org/
+#
+#####################################################################
+# #
+# Table of Contents #
+# #
+# I. INTRODUCTION #
+# II. FORMAT OF THE CONFIGURATION FILE #
+# #
+# 1. LOCAL SET-UP DOCUMENTATION #
+# 2. CONFIGURATION AND LOG FILE LOCATIONS #
+# 3. DEBUGGING #
+# 4. ACCESS CONTROL AND SECURITY #
+# 5. FORWARDING #
+# 6. MISCELLANEOUS #
+# 7. WINDOWS GUI OPTIONS #
+# #
+#####################################################################
#
#
# I. INTRODUCTION
#
# Effect if unset:
#
-# http://www.privoxy.org/version/user-manual/ will be used,
+# https://www.privoxy.org/version/user-manual/ will be used,
# where version is the Privoxy version.
#
# Notes:
# config file, because it is used while the config file is
# being read.
#
-#user-manual http://www.privoxy.org/user-manual/
+#user-manual https://www.privoxy.org/user-manual/
#
# 1.2. trust-info-url
# ====================
# problem on your own.
#
#debug 1 # Log the destination for each request Privoxy let through. See also debug 1024.
-#debug 1024 # Actions that are applied to all sites and maybe overruled later on.
+#debug 1024 # Log the destination for requests Privoxy didn't let through, and the reason why.
#debug 4096 # Startup banner and warnings
#debug 8192 # Non-fatal errors
#
#
enable-proxy-authentication-forwarding 0
#
+# 4.10. trusted-cgi-referer
+# ==========================
+#
+# Specifies:
+#
+# A trusted website or webpage whose links can be followed to
+# reach sensitive CGI pages
+#
+# Type of value:
+#
+# URL or URL prefix
+#
+# Default value:
+#
+# Unset
+#
+# Effect if unset:
+#
+# No external pages are considered trusted referers.
+#
+# Notes:
+#
+# Before Privoxy accepts configuration changes through CGI pages
+# like client-tags or the remote toggle, it checks the Referer
+# header to see if the request comes from a trusted source.
+#
+# By default only the webinterface domains config.privoxy.org
+# and p.p are considered trustworthy. Requests originating from
+# other domains are rejected to prevent third-parties from
+# modifiying Privoxy's state by e.g. embedding images that
+# result in CGI requests.
+#
+# In some environments it may be desirable to embed links to CGI
+# pages on external pages, for example on an Intranet homepage
+# the Privoxy admin controls.
+#
+# The "trusted-cgi-referer" option can be used to add that page,
+# or the whole domain, as trusted source so the resulting
+# requests aren't rejected. Requests are accepted if the
+# specified trusted-cgi-refer is the prefix of the Referer.
+#
+# +-----------------------------------------------------+
+# | Warning |
+# |-----------------------------------------------------|
+# |Declaring pages the admin doesn't control trustworthy|
+# |may allow malicious third parties to modify Privoxy's|
+# |internal state against the user's wishes and without |
+# |the user's knowledge. |
+# +-----------------------------------------------------+
+#
+trusted-cgi-referer http://www.example.org/
+#
+#
# 5. FORWARDING
# ==============
#
# loops if Privoxy's listening port is reachable by the outside
# or an attacker has access to the pages you visit.
#
+# If you are running Privoxy as intercepting proxy without being
+# able to intercept all client requests you may want to adjust
+# the CGI templates to make sure they don't reference content
+# from config.privoxy.org.
+#
# Examples:
#
# accept-intercepted-requests 1
#
#max-client-connections 256
#
-# 6.10. handle-as-empty-doc-returns-ok
+# 6.10. listen-backlog
+# =====================
+#
+# Specifies:
+#
+# Connection queue length requested from the operating system.
+#
+# Type of value:
+#
+# Number.
+#
+# Default value:
+#
+# 128
+#
+# Effect if unset:
+#
+# A connection queue length of 128 is requested from the
+# operating system.
+#
+# Notes:
+#
+# Under high load incoming connection may queue up before
+# Privoxy gets around to serve them. The queue length is
+# limitted by the operating system. Once the queue is full,
+# additional connections are dropped before Privoxy can accept
+# and serve them.
+#
+# Increasing the queue length allows Privoxy to accept more
+# incomming connections that arrive roughly at the same time.
+#
+# Note that Privoxy can only request a certain queue length,
+# whether or not the requested length is actually used depends
+# on the operating system which may use a different length
+# instead.
+#
+# On many operating systems a limit of -1 can be specified to
+# instruct the operating system to use the maximum queue length
+# allowed. Check the listen man page to see if your platform
+# allows this.
+#
+# On some platforms you can use "netstat -Lan -p tcp" to see the
+# effective queue length.
+#
+# Effectively using a value above 128 usually requires changing
+# the system configuration as well. On FreeBSD-based system the
+# limit is controlled by the kern.ipc.soacceptqueue sysctl.
+#
+# Examples:
+#
+# listen-backlog 4096
+#
+#listen-backlog -1
+#
+# 6.11. enable-accept-filter
+# ===========================
+#
+# Specifies:
+#
+# Whether or not Privoxy should use an accept filter
+#
+# Type of value:
+#
+# 0 or 1
+#
+# Default value:
+#
+# 0
+#
+# Effect if unset:
+#
+# No accept filter is enabled.
+#
+# Notes:
+#
+# Accept filters reduce the number of context switches by not
+# passing sockets for new connections to Privoxy until a
+# complete HTTP request is available.
+#
+# As a result, Privoxy can process the whole request right away
+# without having to wait for additional data first.
+#
+# For this option to work, Privoxy has to be compiled with
+# FEATURE_ACCEPT_FILTER and the operating system has to support
+# it (which may require loading a kernel module).
+#
+# Currently accept filters are only supported on FreeBSD-based
+# systems. Check the accf_http(9) man page to learn how to
+# enable the support in the operating system.
+#
+# Examples:
+#
+# enable-accept-filter 1
+#
+#enable-accept-filter 1
+#
+# 6.12. handle-as-empty-doc-returns-ok
# =====================================
#
# Specifies:
#
#handle-as-empty-doc-returns-ok 1
#
-# 6.11. enable-compression
+# 6.13. enable-compression
# =========================
#
# Specifies:
#
#enable-compression 1
#
-# 6.12. compression-level
+# 6.14. compression-level
# ========================
#
# Specifies:
#
#compression-level 1
#
-# 6.13. client-header-order
+# 6.15. client-header-order
# ==========================
#
# Specifies:
# Content-Type
#
#
+# 6.16. client-specific-tag
+# ==========================
+#
+# Specifies:
+#
+# The name of a tag that will always be set for clients that
+# requested it through the webinterface.
+#
+# Type of value:
+#
+# Tag name followed by a description that will be shown in the
+# webinterface
+#
+# Default value:
+#
+# None
+#
+# Notes:
+#
+# +-----------------------------------------------------+
+# | Warning |
+# |-----------------------------------------------------|
+# |This is an experimental feature. The syntax is likely|
+# |to change in future versions. |
+# +-----------------------------------------------------+
+#
+# Client-specific tags allow Privoxy admins to create different
+# profiles and let the users chose which one they want without
+# impacting other users.
+#
+# One use case is allowing users to circumvent certain blocks
+# without having to allow them to circumvent all blocks. This is
+# not possible with the enable-remote-toggle feature because it
+# would bluntly disable all blocks for all users and also affect
+# other actions like filters. It also is set globally which
+# renders it useless in most multi-user setups.
+#
+# After a client-specific tag has been defined with the
+# client-specific-tag directive, action sections can be
+# activated based on the tag by using a CLIENT-TAG pattern. The
+# CLIENT-TAG pattern is evaluated at the same priority as URL
+# patterns, as a result the last matching pattern wins. Tags
+# that are created based on client or server headers are
+# evaluated later on and can overrule CLIENT-TAG and URL
+# patterns!
+#
+# The tag is set for all requests that come from clients that
+# requested it to be set. Note that "clients" are differentiated
+# by IP address, if the IP address changes the tag has to be
+# requested again.
+#
+# Clients can request tags to be set by using the CGI interface
+# http://config.privoxy.org/client-tags. The specific tag
+# description is only used on the web page and should be phrased
+# in away that the user understand the effect of the tag.
+#
+# Examples:
+#
+# # Define a couple of tags, the described effect requires action sections
+# # that are enabled based on CLIENT-TAG patterns.
+# client-specific-tag circumvent-blocks Overrule blocks but do not affect other actions
+# disable-content-filters Disable content-filters but do not affect other actions
+#
+#
+#
+# 6.17. client-tag-lifetime
+# ==========================
+#
+# Specifies:
+#
+# How long a temporarily enabled tag remains enabled.
+#
+# Type of value:
+#
+# Time in seconds.
+#
+# Default value:
+#
+# 60
+#
+# Notes:
+#
+# +-----------------------------------------------------+
+# | Warning |
+# |-----------------------------------------------------|
+# |This is an experimental feature. The syntax is likely|
+# |to change in future versions. |
+# +-----------------------------------------------------+
+#
+# In case of some tags users may not want to enable them
+# permanently, but only for a short amount of time, for example
+# to circumvent a block that is the result of an overly-broad
+# URL pattern.
+#
+# The CGI interface http://config.privoxy.org/client-tags
+# therefore provides a "enable this tag temporarily" option. If
+# it is used, the tag will be set until the client-tag-lifetime
+# is over.
+#
+# Examples:
+#
+# # Increase the time to life for temporarily enabled tags to 3 minutes
+# client-tag-lifetime 180
+#
+#
+#
+# 6.18. trust-x-forwarded-for
+# ============================
+#
+# Specifies:
+#
+# Whether or not Privoxy should use IP addresses specified with
+# the X-Forwarded-For header
+#
+# Type of value:
+#
+# 0 or one
+#
+# Default value:
+#
+# 0
+#
+# Notes:
+#
+# +-----------------------------------------------------+
+# | Warning |
+# |-----------------------------------------------------|
+# |This is an experimental feature. The syntax is likely|
+# |to change in future versions. |
+# +-----------------------------------------------------+
+#
+# If clients reach Privoxy through another proxy, for example a
+# load balancer, Privoxy can't tell the client's IP address from
+# the connection. If multiple clients use the same proxy, they
+# will share the same client tag settings which is usually not
+# desired.
+#
+# This option lets Privoxy use the X-Forwarded-For header value
+# as client IP address. If the proxy sets the header, multiple
+# clients using the same proxy do not share the same client tag
+# settings.
+#
+# This option should only be enabled if Privoxy can only be
+# reached through a proxy and if the proxy can be trusted to set
+# the header correctly. It is recommended that ACL are used to
+# make sure only trusted systems can reach Privoxy.
+#
+# If access to Privoxy isn't limited to trusted systems, this
+# option would allow malicious clients to change the client tags
+# for other clients or increase Privoxy's memory requirements by
+# registering lots of client tag settings for clients that don't
+# exist.
+#
+# Examples:
+#
+# # Allow systems that can reach Privoxy to provide the client
+# # IP address with a X-Forwarded-For header.
+# trust-x-forwarded-for 1
+#
+#
+#
+# 6.19. receive-buffer-size
+# ==========================
+#
+# Specifies:
+#
+# The size of the buffer Privoxy uses to receive data from the
+# server.
+#
+# Type of value:
+#
+# Size in bytes
+#
+# Default value:
+#
+# 5000
+#
+# Notes:
+#
+# Increasing the receive-buffer-size increases Privoxy's memory
+# usage but can lower the number of context switches and thereby
+# reduce the cpu usage and potentially increase the throughput.
+#
+# This is mostly relevant for fast network connections and large
+# downloads that don't require filtering.
+#
+# Reducing the buffer size reduces the amount of memory Privoxy
+# needs to handle the request but increases the number of
+# systemcalls and may reduce the throughput.
+#
+# A dtrace command like: "sudo dtrace -n 'syscall::read:return /
+# execname == "privoxy"/ { @[execname] = llquantize(arg0, 10, 0,
+# 5, 20); @m = max(arg0)}'" can be used to properly tune the
+# receive-buffer-size. On systems without dtrace, strace or
+# truss may be used as less convenient alternatives.
+#
+# If the buffer is too large it will increase Privoxy's memory
+# footprint without any benefit. As the memory is (currently)
+# cleared before using it, a buffer that is too large can
+# actually reduce the throughput.
+#
+# Examples:
+#
+# # Increase the receive buffer size
+# receive-buffer-size 32768
+#
+#
+#
# 7. WINDOWS GUI OPTIONS
# =======================
#