- debug 32768 # log all data read from the network</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> To select multiple debug levels, you can either add them or use
- multiple <TT
-CLASS="LITERAL"
->debug</TT
-> lines.
- </P
-><P
-> A debug level of 1 is informative because it will show you each request
- as it happens. <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->1, 1024, 4096 and 8192 are recommended</I
-></SPAN
->
- so that you will notice when things go wrong. The other levels are
- probably only of interest if you are hunting down a specific problem.
- They can produce a hell of an output (especially 16).
-
- </P
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> used to ship with the debug levels recommended above enabled by
- default, but due to privacy concerns 3.0.7 and later are configured to
- only log fatal errors.
- </P
-><P
-> If you are used to the more verbose settings, simply enable the debug lines
- below again.
- </P
-><P
-> If you want to use pure CLF (Common Log Format), you should set <SPAN
-CLASS="QUOTE"
->"debug
- 512"</SPAN
-> <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->ONLY</I
-></SPAN
-> and not enable anything else.
- </P
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> has a hard-coded limit for the
- length of log messages. If it's reached, messages are logged truncated
- and marked with <SPAN
-CLASS="QUOTE"
->"... [too long, truncated]"</SPAN
->.
- </P
-><P
-> Please don't file any support requests without trying to reproduce
- the problem with increased debug level first. Once you read the log
- messages, you may even be able to solve the problem on your own.
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="SINGLE-THREADED"
->7.3.2. single-threaded</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Whether to run only one server thread.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->None</I
-></SPAN
-></P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->Unset</I
-></SPAN
-></P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Multi-threaded (or, where unavailable: forked) operation, i.e. the ability to
- serve multiple requests simultaneously.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> This option is only there for debugging purposes.
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->It will drastically reduce performance.</I
-></SPAN
->
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="HOSTNAME"
->7.3.3. hostname</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> The hostname shown on the CGI pages.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->Text</P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->Unset</I
-></SPAN
-></P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> The hostname provided by the operating system is used.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> On some misconfigured systems resolving the hostname fails or
- takes too much time and slows Privoxy down. Setting a fixed hostname
- works around the problem.
- </P
-><P
-> In other circumstances it might be desirable to show a hostname
- other than the one returned by the operating system. For example
- if the system has several different hostnames and you don't want
- to use the first one.
- </P
-><P
-> Note that Privoxy does not validate the specified hostname value.
- </P
-></DD
-></DL
-></DIV
-></DIV
-></DIV
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="ACCESS-CONTROL"
->7.4. Access Control and Security</A
-></H2
-><P
-> This section of the config file controls the security-relevant aspects
- of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->'s configuration.
- </P
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="LISTEN-ADDRESS"
->7.4.1. listen-address</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> The address and TCP port on which <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> will
- listen for client requests.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->[<TT
-CLASS="REPLACEABLE"
-><I
->IP-Address</I
-></TT
->]:<TT
-CLASS="REPLACEABLE"
-><I
->Port</I
-></TT
-></P
-><P
->[<TT
-CLASS="REPLACEABLE"
-><I
->Hostname</I
-></TT
->]:<TT
-CLASS="REPLACEABLE"
-><I
->Port</I
-></TT
-></P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
->127.0.0.1:8118</P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Bind to 127.0.0.1 (IPv4 localhost), port 8118. This is suitable and
- recommended for home users who run <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on
- the same machine as their browser.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> You will need to configure your browser(s) to this proxy address and port.
- </P
-><P
-> If you already have another service running on port 8118, or if you want to
- serve requests from other machines (e.g. on your local network) as well, you
- will need to override the default.
- </P
-><P
-> You can use this statement multiple times to make
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> listen on more ports or more
- <ABBR
-CLASS="ABBREV"
->IP</ABBR
-> addresses. Suitable if your operating system does not
- support sharing <ABBR
-CLASS="ABBREV"
->IPv6</ABBR
-> and <ABBR
-CLASS="ABBREV"
->IPv4</ABBR
-> protocols
- on the same socket.
- </P
-><P
-> If a hostname is used instead of an IP address, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- will try to resolve it to an IP address and if there are multiple, use the first
- one returned.
- </P
-><P
-> If the address for the hostname isn't already known on the system
- (for example because it's in /etc/hostname), this may result in DNS
- traffic.
- </P
-><P
-> If the specified address isn't available on the system, or if the
- hostname can't be resolved, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- will fail to start.
- </P
-><P
-> IPv6 addresses containing colons have to be quoted by brackets.
- They can only be used if <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> has
- been compiled with IPv6 support. If you aren't sure if your version
- supports it, have a look at
- <TT
-CLASS="LITERAL"
->http://config.privoxy.org/show-status</TT
->.
- </P
-><P
-> Some operating systems will prefer IPv6 to IPv4 addresses even if the
- system has no IPv6 connectivity which is usually not expected by the user.
- Some even rely on DNS to resolve localhost which mean the "localhost" address
- used may not actually be local.
- </P
-><P
-> It is therefore recommended to explicitly configure the intended IP address
- instead of relying on the operating system, unless there's a strong reason not to.
- </P
-><P
-> If you leave out the address, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> will bind to all
- IPv4 interfaces (addresses) on your machine and may become reachable from the
- Internet and/or the local network. Be aware that some GNU/Linux distributions
- modify that behaviour without updating the documentation. Check for non-standard
- patches if your <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->version behaves differently.
- </P
-><P
-> If you configure <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->to be reachable from the
- network, consider using <A
-HREF="config.html#ACLS"
->access control lists</A
->
- (ACL's, see below), and/or a firewall.
- </P
-><P
-> If you open <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to untrusted users, you will
- also want to make sure that the following actions are disabled: <TT
-CLASS="LITERAL"
-><A
-HREF="config.html#ENABLE-EDIT-ACTIONS"
->enable-edit-actions</A
-></TT
-> and
- <TT
-CLASS="LITERAL"
-><A
-HREF="config.html#ENABLE-REMOTE-TOGGLE"
->enable-remote-toggle</A
-></TT
->
- </P
-><P
-> With the exception noted above, listening on multiple addresses is currently
- not supported by <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> directly.
- It can be done on most operating systems by letting a packet filter
- redirect request for certain addresses to Privoxy, though.
- </P
-></DD
-><DT
->Example:</DT
-><DD
-><P
-> Suppose you are running <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on
- a machine which has the address 192.168.0.1 on your local private network
- (192.168.0.0) and has another outside connection with a different address.
- You want it to serve requests from inside only:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
-> listen-address 192.168.0.1:8118</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Suppose you are running <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on an
- IPv6-capable machine and you want it to listen on the IPv6 address
- of the loopback device:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
-> listen-address [::1]:8118</PRE
-></TD
-></TR
-></TABLE
->
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="TOGGLE"
->7.4.2. toggle</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Initial state of "toggle" status
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->1 or 0</P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
->1</P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Act as if toggled on
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> If set to 0, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> will start in
- <SPAN
-CLASS="QUOTE"
->"toggled off"</SPAN
-> mode, i.e. mostly behave like a normal,
- content-neutral proxy with both ad blocking and content filtering
- disabled. See <TT
-CLASS="LITERAL"
->enable-remote-toggle</TT
-> below.
- </P
-><P
-> The windows version will only display the toggle icon in the system tray
- if this option is present.
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="ENABLE-REMOTE-TOGGLE"
->7.4.3. enable-remote-toggle</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Whether or not the <A
-HREF="http://config.privoxy.org/toggle"
-TARGET="_top"
->web-based toggle
- feature</A
-> may be used
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->0 or 1</P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
->0</P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> The web-based toggle feature is disabled.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> When toggled off, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> mostly acts like a normal,
- content-neutral proxy, i.e. doesn't block ads or filter content.
- </P
-><P
-> Access to the toggle feature can <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->not</I
-></SPAN
-> be
- controlled separately by <SPAN
-CLASS="QUOTE"
->"ACLs"</SPAN
-> or HTTP authentication,
- so that everybody who can access <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> (see
- <SPAN
-CLASS="QUOTE"
->"ACLs"</SPAN
-> and <TT
-CLASS="LITERAL"
->listen-address</TT
-> above) can
- toggle it for all users. So this option is <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->not recommended</I
-></SPAN
->
- for multi-user environments with untrusted users.
- </P
-><P
-> Note that malicious client side code (e.g Java) is also
- capable of using this option.
- </P
-><P
-> As a lot of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> users don't read
- documentation, this feature is disabled by default.
- </P
-><P
-> Note that you must have compiled <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> with
- support for this feature, otherwise this option has no effect.
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="ENABLE-REMOTE-HTTP-TOGGLE"
->7.4.4. enable-remote-http-toggle</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Whether or not Privoxy recognizes special HTTP headers to change its behaviour.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->0 or 1</P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
->0</P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Privoxy ignores special HTTP headers.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> When toggled on, the client can change <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
->
- behaviour by setting special HTTP headers. Currently the only supported
- special header is <SPAN
-CLASS="QUOTE"
->"X-Filter: No"</SPAN
->, to disable filtering for
- the ongoing request, even if it is enabled in one of the action files.
- </P
-><P
-> This feature is disabled by default. If you are using
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> in a environment with trusted clients,
- you may enable this feature at your discretion. Note that malicious client
- side code (e.g Java) is also capable of using this feature.
- </P
-><P
-> This option will be removed in future releases as it has been obsoleted
- by the more general header taggers.
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="ENABLE-EDIT-ACTIONS"
->7.4.5. enable-edit-actions</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Whether or not the <A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->web-based actions
- file editor</A
-> may be used
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->0 or 1</P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
->0</P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> The web-based actions file editor is disabled.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> Access to the editor can <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->not</I
-></SPAN
-> be
- controlled separately by <SPAN
-CLASS="QUOTE"
->"ACLs"</SPAN
-> or HTTP authentication,
- so that everybody who can access <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> (see
- <SPAN
-CLASS="QUOTE"
->"ACLs"</SPAN
-> and <TT
-CLASS="LITERAL"
->listen-address</TT
-> above) can
- modify its configuration for all users.
- </P
-><P
-> This option is <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->not recommended</I
-></SPAN
-> for environments
- with untrusted users and as a lot of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- users don't read documentation, this feature is disabled by default.
- </P
-><P
-> Note that malicious client side code (e.g Java) is also
- capable of using the actions editor and you shouldn't enable
- this options unless you understand the consequences and are
- sure your browser is configured correctly.
- </P
-><P
-> Note that you must have compiled <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> with
- support for this feature, otherwise this option has no effect.
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="ENFORCE-BLOCKS"
->7.4.6. enforce-blocks</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Whether the user is allowed to ignore blocks and can <SPAN
-CLASS="QUOTE"
->"go there anyway"</SPAN
->.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
-> <TT
-CLASS="REPLACEABLE"
-><I
->0 or 1</I
-></TT
->
- </P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->0</I
-></SPAN
-></P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Blocks are not enforced.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is mainly used to block and filter
- requests as a service to the user, for example to block ads and other
- junk that clogs the pipes. <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> configuration
- isn't perfect and sometimes innocent pages are blocked. In this situation it
- makes sense to allow the user to enforce the request and have
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> ignore the block.
- </P
-><P
-> In the default configuration <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
->
- <SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
-> page contains a <SPAN
-CLASS="QUOTE"
->"go there anyway"</SPAN
->
- link to adds a special string (the force prefix) to the request URL.
- If that link is used, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> will
- detect the force prefix, remove it again and let the request pass.
- </P
-><P
-> Of course <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> can also be used to enforce
- a network policy. In that case the user obviously should not be able to
- bypass any blocks, and that's what the <SPAN
-CLASS="QUOTE"
->"enforce-blocks"</SPAN
->
- option is for. If it's enabled, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> hides
- the <SPAN
-CLASS="QUOTE"
->"go there anyway"</SPAN
-> link. If the user adds the force
- prefix by hand, it will not be accepted and the circumvention attempt
- is logged.
- </P
-></DD
-><DT
->Examples:</DT
-><DD
-><P
-> enforce-blocks 1
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="ACLS"
->7.4.7. ACLs: permit-access and deny-access</A
-></H4
-><A
-NAME="PERMIT-ACCESS"
-></A
-><A
-NAME="DENY-ACCESS"
-></A
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Who can access what.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
-> <TT
-CLASS="REPLACEABLE"
-><I
->src_addr</I
-></TT
->[:<TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
->][/<TT
-CLASS="REPLACEABLE"
-><I
->src_masklen</I
-></TT
->]
- [<TT
-CLASS="REPLACEABLE"
-><I
->dst_addr</I
-></TT
->[:<TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
->][/<TT
-CLASS="REPLACEABLE"
-><I
->dst_masklen</I
-></TT
->]]
- </P
-><P
-> Where <TT
-CLASS="REPLACEABLE"
-><I
->src_addr</I
-></TT
-> and
- <TT
-CLASS="REPLACEABLE"
-><I
->dst_addr</I
-></TT
-> are IPv4 addresses in dotted decimal notation or valid
- DNS names, <TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
-> is a port
- number, and <TT
-CLASS="REPLACEABLE"
-><I
->src_masklen</I
-></TT
-> and
- <TT
-CLASS="REPLACEABLE"
-><I
->dst_masklen</I
-></TT
-> are subnet masks in CIDR notation, i.e. integer
- values from 2 to 30 representing the length (in bits) of the network address. The masks and the whole
- destination part are optional.
- </P
-><P
-> If your system implements
- <A
-HREF="http://tools.ietf.org/html/rfc3493"
-TARGET="_top"
->RFC 3493</A
->, then
- <TT
-CLASS="REPLACEABLE"
-><I
->src_addr</I
-></TT
-> and <TT
-CLASS="REPLACEABLE"
-><I
->dst_addr</I
-></TT
-> can be IPv6 addresses delimeted by
- brackets, <TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
-> can be a number
- or a service name, and
- <TT
-CLASS="REPLACEABLE"
-><I
->src_masklen</I
-></TT
-> and
- <TT
-CLASS="REPLACEABLE"
-><I
->dst_masklen</I
-></TT
-> can be a number
- from 0 to 128.
- </P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->Unset</I
-></SPAN
-></P
-><P
-> If no <TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
-> is specified,
- any port will match. If no <TT
-CLASS="REPLACEABLE"
-><I
->src_masklen</I
-></TT
-> or
- <TT
-CLASS="REPLACEABLE"
-><I
->src_masklen</I
-></TT
-> is given, the complete IP
- address has to match (i.e. 32 bits for IPv4 and 128 bits for IPv6).
- </P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Don't restrict access further than implied by <TT
-CLASS="LITERAL"
->listen-address</TT
->
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> Access controls are included at the request of ISPs and systems
- administrators, and <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->are not usually needed by individual users</I
-></SPAN
->.
- For a typical home user, it will normally suffice to ensure that
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> only listens on the localhost
- (127.0.0.1) or internal (home) network address by means of the
- <A
-HREF="config.html#LISTEN-ADDRESS"
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->listen-address</I
-></SPAN
-></A
->
- option.
- </P
-><P
-> Please see the warnings in the FAQ that <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- is not intended to be a substitute for a firewall or to encourage anyone
- to defer addressing basic security weaknesses.
- </P
-><P
-> Multiple ACL lines are OK.
- If any ACLs are specified, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> only talks
- to IP addresses that match at least one <TT
-CLASS="LITERAL"
->permit-access</TT
-> line
- and don't match any subsequent <TT
-CLASS="LITERAL"
->deny-access</TT
-> line. In other words, the
- last match wins, with the default being <TT
-CLASS="LITERAL"
->deny-access</TT
->.
- </P
-><P
-> If <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is using a forwarder (see <TT
-CLASS="LITERAL"
->forward</TT
-> below)
- for a particular destination URL, the <TT
-CLASS="REPLACEABLE"
-><I
->dst_addr</I
-></TT
->
- that is examined is the address of the forwarder and <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->NOT</I
-></SPAN
-> the address
- of the ultimate target. This is necessary because it may be impossible for the local
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to determine the IP address of the
- ultimate target (that's often what gateways are used for).
- </P
-><P
-> You should prefer using IP addresses over DNS names, because the address lookups take
- time. All DNS names must resolve! You can <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->not</I
-></SPAN
-> use domain patterns
- like <SPAN
-CLASS="QUOTE"
->"*.org"</SPAN
-> or partial domain names. If a DNS name resolves to multiple
- IP addresses, only the first one is used.
- </P
-><P
-> Some systems allow IPv4 clients to connect to IPv6 server sockets.
- Then the client's IPv4 address will be translated by the system into
- IPv6 address space with special prefix ::ffff:0:0/96 (so called IPv4
- mapped IPv6 address). <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> can handle it
- and maps such ACL addresses automatically.
- </P
-><P
-> Denying access to particular sites by ACL may have undesired side effects
- if the site in question is hosted on a machine which also hosts other sites
- (most sites are).
- </P
-></DD
-><DT
->Examples:</DT
-><DD
-><P
-> Explicitly define the default behavior if no ACL and
- <TT
-CLASS="LITERAL"
->listen-address</TT
-> are set: <SPAN
-CLASS="QUOTE"
->"localhost"</SPAN
->
- is OK. The absence of a <TT
-CLASS="REPLACEABLE"
-><I
->dst_addr</I
-></TT
-> implies that
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->all</I
-></SPAN
-> destination addresses are OK:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> permit-access localhost</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Allow any host on the same class C subnet as www.privoxy.org access to
- nothing but www.example.com (or other domains hosted on the same system):
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> permit-access www.privoxy.org/24 www.example.com/32</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Allow access from any host on the 26-bit subnet 192.168.45.64 to anywhere,
- with the exception that 192.168.45.73 may not access the IP address behind
- www.dirty-stuff.example.com:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> permit-access 192.168.45.64/26
- deny-access 192.168.45.73 www.dirty-stuff.example.com</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Allow access from the IPv4 network 192.0.2.0/24 even if listening on
- an IPv6 wild card address (not supported on all platforms):
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
-> permit-access 192.0.2.0/24</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> This is equivalent to the following line even if listening on an
- IPv4 address (not supported on all platforms):
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
-> permit-access [::ffff:192.0.2.0]/120</PRE
-></TD
-></TR
-></TABLE
->
- </P
-></DD
-></DL
-></DIV
-></DIV
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="BUFFER-LIMIT"
->7.4.8. buffer-limit</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> Maximum size of the buffer for content filtering.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
->Size in Kbytes</P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
->4096</P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Use a 4MB (4096 KB) limit.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> For content filtering, i.e. the <TT
-CLASS="LITERAL"
->+filter</TT
-> and
- <TT
-CLASS="LITERAL"
->+deanimate-gif</TT
-> actions, it is necessary that
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> buffers the entire document body.
- This can be potentially dangerous, since a server could just keep sending
- data indefinitely and wait for your RAM to exhaust -- with nasty consequences.
- Hence this option.
- </P
-><P
-> When a document buffer size reaches the <TT
-CLASS="LITERAL"
->buffer-limit</TT
->, it is
- flushed to the client unfiltered and no further attempt to
- filter the rest of the document is made. Remember that there may be multiple threads
- running, which might require up to <TT
-CLASS="LITERAL"
->buffer-limit</TT
-> Kbytes
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->each</I
-></SPAN
->, unless you have enabled <SPAN
-CLASS="QUOTE"
->"single-threaded"</SPAN
->
- above.
- </P
-></DD
-></DL
-></DIV
-></DIV
-></DIV
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="FORWARDING"
->7.5. Forwarding</A
-></H2
-><P
-> This feature allows routing of HTTP requests through a chain of
- multiple proxies.</P
-><P
-> Forwarding can be used to chain Privoxy with a caching proxy to speed
- up browsing. Using a parent proxy may also be necessary if the machine
- that <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> runs on has no direct Internet access.</P
-><P
-> Note that parent proxies can severely decrease your privacy level.
- For example a parent proxy could add your IP address to the request
- headers and if it's a caching proxy it may add the <SPAN
-CLASS="QUOTE"
->"Etag"</SPAN
->
- header to revalidation requests again, even though you configured Privoxy
- to remove it. It may also ignore Privoxy's header time randomization and use the
- original values which could be used by the server as cookie replacement
- to track your steps between visits.</P
-><P
-> Also specified here are SOCKS proxies. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- supports the SOCKS 4 and SOCKS 4A protocols.</P
-><DIV
-CLASS="SECT3"
-><H4
-CLASS="SECT3"
-><A
-NAME="FORWARD"
->7.5.1. forward</A
-></H4
-><P
-></P
-><DIV
-CLASS="VARIABLELIST"
-><DL
-><DT
->Specifies:</DT
-><DD
-><P
-> To which parent HTTP proxy specific requests should be routed.
- </P
-></DD
-><DT
->Type of value:</DT
-><DD
-><P
-> <TT
-CLASS="REPLACEABLE"
-><I
->target_pattern</I
-></TT
->
- <TT
-CLASS="REPLACEABLE"
-><I
->http_parent</I
-></TT
->[:<TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
->]
- </P
-><P
-> where <TT
-CLASS="REPLACEABLE"
-><I
->target_pattern</I
-></TT
-> is a <A
-HREF="actions-file.html#AF-PATTERNS"
->URL pattern</A
->
- that specifies to which requests (i.e. URLs) this forward rule shall apply. Use <TT
-CLASS="LITERAL"
->/</TT
-> to
- denote <SPAN
-CLASS="QUOTE"
->"all URLs"</SPAN
->.
- <TT
-CLASS="REPLACEABLE"
-><I
->http_parent</I
-></TT
->[:<TT
-CLASS="REPLACEABLE"
-><I
->port</I
-></TT
->]
- is the DNS name or IP address of the parent HTTP proxy through which the requests should be forwarded,
- optionally followed by its listening port (default: 8000).
- Use a single dot (<TT
-CLASS="LITERAL"
->.</TT
->) to denote <SPAN
-CLASS="QUOTE"
->"no forwarding"</SPAN
->.
- </P
-></DD
-><DT
->Default value:</DT
-><DD
-><P
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->Unset</I
-></SPAN
-></P
-></DD
-><DT
->Effect if unset:</DT
-><DD
-><P
-> Don't use parent HTTP proxies.
- </P
-></DD
-><DT
->Notes:</DT
-><DD
-><P
-> If <TT
-CLASS="REPLACEABLE"
-><I
->http_parent</I
-></TT
-> is <SPAN
-CLASS="QUOTE"
->"."</SPAN
->, then requests are not
- forwarded to another HTTP proxy but are made directly to the web servers.
- </P
-><P
-> <TT
-CLASS="REPLACEABLE"
-><I
->http_parent</I
-></TT
-> can be a
- numerical IPv6 address (if
- <A
-HREF="http://tools.ietf.org/html/rfc3493"
-TARGET="_top"
->RFC 3493</A
-> is
- implemented). To prevent clashes with the port delimiter, the whole IP
- address has to be put into brackets. On the other hand a <TT
-CLASS="REPLACEABLE"
-><I
->target_pattern</I
-></TT
-> containing an IPv6 address
- has to be put into angle brackets (normal brackets are reserved for
- regular expressions already).
- </P
-><P
-> Multiple lines are OK, they are checked in sequence, and the last match wins.
- </P
-></DD
-><DT
->Examples:</DT
-><DD
-><P
-> Everything goes to an example parent proxy, except SSL on port 443 (which it doesn't handle):
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> forward / parent-proxy.example.org:8080
- forward :443 .</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Everything goes to our example ISP's caching proxy, except for requests
- to that ISP's sites:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> forward / caching-proxy.isp.example.net:8000
- forward .isp.example.net .</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Parent proxy specified by an IPv6 address:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
-> forward / [2001:DB8::1]:8000</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Suppose your parent proxy doesn't support IPv6:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="90%"
-><TR
-><TD
-><PRE
-CLASS="PROGRAMLISTING"
-> forward / parent-proxy.example.org:8000
+ debug 32768 # log all data read from the network
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ To select multiple debug levels, you can either add them or
+ use multiple <tt class="LITERAL">debug</tt> lines.
+ </p>
+ <p>
+ A debug level of 1 is informative because it will show you
+ each request as it happens. <span class="emphasis"><i
+ class="EMPHASIS">1, 1024, 4096 and 8192 are
+ recommended</i></span> so that you will notice when things
+ go wrong. The other levels are probably only of interest if
+ you are hunting down a specific problem. They can produce a
+ hell of an output (especially 16).
+ </p>
+ <p>
+ <span class="APPLICATION">Privoxy</span> used to ship with
+ the debug levels recommended above enabled by default, but
+ due to privacy concerns 3.0.7 and later are configured to
+ only log fatal errors.
+ </p>
+ <p>
+ If you are used to the more verbose settings, simply enable
+ the debug lines below again.
+ </p>
+ <p>
+ If you want to use pure CLF (Common Log Format), you should
+ set <span class="QUOTE">"debug 512"</span> <span class=
+ "emphasis"><i class="EMPHASIS">ONLY</i></span> and not
+ enable anything else.
+ </p>
+ <p>
+ <span class="APPLICATION">Privoxy</span> has a hard-coded
+ limit for the length of log messages. If it's reached,
+ messages are logged truncated and marked with <span class=
+ "QUOTE">"... [too long, truncated]"</span>.
+ </p>
+ <p>
+ Please don't file any support requests without trying to
+ reproduce the problem with increased debug level first.
+ Once you read the log messages, you may even be able to
+ solve the problem on your own.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="SINGLE-THREADED">7.3.2. single-threaded</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Whether to run only one server thread.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ <span class="emphasis"><i class="EMPHASIS">None</i></span>
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ <span class="emphasis"><i class="EMPHASIS">Unset</i></span>
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Multi-threaded (or, where unavailable: forked) operation,
+ i.e. the ability to serve multiple requests simultaneously.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ This option is only there for debugging purposes. <span
+ class="emphasis"><i class="EMPHASIS">It will drastically
+ reduce performance.</i></span>
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="HOSTNAME">7.3.3. hostname</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ The hostname shown on the CGI pages.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ Text
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ <span class="emphasis"><i class="EMPHASIS">Unset</i></span>
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ The hostname provided by the operating system is used.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ On some misconfigured systems resolving the hostname fails
+ or takes too much time and slows Privoxy down. Setting a
+ fixed hostname works around the problem.
+ </p>
+ <p>
+ In other circumstances it might be desirable to show a
+ hostname other than the one returned by the operating
+ system. For example if the system has several different
+ hostnames and you don't want to use the first one.
+ </p>
+ <p>
+ Note that Privoxy does not validate the specified hostname
+ value.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ </div>
+ <div class="SECT2">
+ <h2 class="SECT2">
+ <a name="ACCESS-CONTROL">7.4. Access Control and Security</a>
+ </h2>
+ <p>
+ This section of the config file controls the security-relevant
+ aspects of <span class="APPLICATION">Privoxy</span>'s
+ configuration.
+ </p>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="LISTEN-ADDRESS">7.4.1. listen-address</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ The address and TCP port on which <span class=
+ "APPLICATION">Privoxy</span> will listen for client
+ requests.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ [<tt class="REPLACEABLE"><i>IP-Address</i></tt>]:<tt class=
+ "REPLACEABLE"><i>Port</i></tt>
+ </p>
+ <p>
+ [<tt class="REPLACEABLE"><i>Hostname</i></tt>]:<tt class=
+ "REPLACEABLE"><i>Port</i></tt>
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ 127.0.0.1:8118
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Bind to 127.0.0.1 (IPv4 localhost), port 8118. This is
+ suitable and recommended for home users who run <span
+ class="APPLICATION">Privoxy</span> on the same machine as
+ their browser.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ You will need to configure your browser(s) to this proxy
+ address and port.
+ </p>
+ <p>
+ If you already have another service running on port 8118,
+ or if you want to serve requests from other machines (e.g.
+ on your local network) as well, you will need to override
+ the default.
+ </p>
+ <p>
+ You can use this statement multiple times to make <span
+ class="APPLICATION">Privoxy</span> listen on more ports or
+ more <abbr class="ABBREV">IP</abbr> addresses. Suitable if
+ your operating system does not support sharing <abbr class=
+ "ABBREV">IPv6</abbr> and <abbr class="ABBREV">IPv4</abbr>
+ protocols on the same socket.
+ </p>
+ <p>
+ If a hostname is used instead of an IP address, <span
+ class="APPLICATION">Privoxy</span> will try to resolve it
+ to an IP address and if there are multiple, use the first
+ one returned.
+ </p>
+ <p>
+ If the address for the hostname isn't already known on the
+ system (for example because it's in /etc/hostname), this
+ may result in DNS traffic.
+ </p>
+ <p>
+ If the specified address isn't available on the system, or
+ if the hostname can't be resolved, <span class=
+ "APPLICATION">Privoxy</span> will fail to start.
+ </p>
+ <p>
+ IPv6 addresses containing colons have to be quoted by
+ brackets. They can only be used if <span class=
+ "APPLICATION">Privoxy</span> has been compiled with IPv6
+ support. If you aren't sure if your version supports it,
+ have a look at <tt class=
+ "LITERAL">http://config.privoxy.org/show-status</tt>.
+ </p>
+ <p>
+ Some operating systems will prefer IPv6 to IPv4 addresses
+ even if the system has no IPv6 connectivity which is
+ usually not expected by the user. Some even rely on DNS to
+ resolve localhost which mean the "localhost" address used
+ may not actually be local.
+ </p>
+ <p>
+ It is therefore recommended to explicitly configure the
+ intended IP address instead of relying on the operating
+ system, unless there's a strong reason not to.
+ </p>
+ <p>
+ If you leave out the address, <span class=
+ "APPLICATION">Privoxy</span> will bind to all IPv4
+ interfaces (addresses) on your machine and may become
+ reachable from the Internet and/or the local network. Be
+ aware that some GNU/Linux distributions modify that
+ behaviour without updating the documentation. Check for
+ non-standard patches if your <span class=
+ "APPLICATION">Privoxy</span>version behaves differently.
+ </p>
+ <p>
+ If you configure <span class="APPLICATION">Privoxy</span>to
+ be reachable from the network, consider using <a href=
+ "config.html#ACLS">access control lists</a> (ACL's, see
+ below), and/or a firewall.
+ </p>
+ <p>
+ If you open <span class="APPLICATION">Privoxy</span> to
+ untrusted users, you will also want to make sure that the
+ following actions are disabled: <tt class="LITERAL"><a
+ href=
+ "config.html#ENABLE-EDIT-ACTIONS">enable-edit-actions</a></tt>
+ and <tt class="LITERAL"><a href=
+ "config.html#ENABLE-REMOTE-TOGGLE">enable-remote-toggle</a></tt>
+ </p>
+ <p>
+ With the exception noted above, listening on multiple
+ addresses is currently not supported by <span class=
+ "APPLICATION">Privoxy</span> directly. It can be done on
+ most operating systems by letting a packet filter redirect
+ request for certain addresses to Privoxy, though.
+ </p>
+ </dd>
+ <dt>
+ Example:
+ </dt>
+ <dd>
+ <p>
+ Suppose you are running <span class=
+ "APPLICATION">Privoxy</span> on a machine which has the
+ address 192.168.0.1 on your local private network
+ (192.168.0.0) and has another outside connection with a
+ different address. You want it to serve requests from
+ inside only:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="PROGRAMLISTING">
+ listen-address 192.168.0.1:8118
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Suppose you are running <span class=
+ "APPLICATION">Privoxy</span> on an IPv6-capable machine and
+ you want it to listen on the IPv6 address of the loopback
+ device:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="PROGRAMLISTING">
+ listen-address [::1]:8118
+</pre>
+ </td>
+ </tr>
+ </table>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="TOGGLE">7.4.2. toggle</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Initial state of "toggle" status
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ 1 or 0
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ 1
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Act as if toggled on
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ If set to 0, <span class="APPLICATION">Privoxy</span> will
+ start in <span class="QUOTE">"toggled off"</span> mode,
+ i.e. mostly behave like a normal, content-neutral proxy
+ with both ad blocking and content filtering disabled. See
+ <tt class="LITERAL">enable-remote-toggle</tt> below.
+ </p>
+ <p>
+ The windows version will only display the toggle icon in
+ the system tray if this option is present.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="ENABLE-REMOTE-TOGGLE">7.4.3. enable-remote-toggle</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Whether or not the <a href=
+ "http://config.privoxy.org/toggle" target="_top">web-based
+ toggle feature</a> may be used
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ 0 or 1
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ 0
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ The web-based toggle feature is disabled.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ When toggled off, <span class="APPLICATION">Privoxy</span>
+ mostly acts like a normal, content-neutral proxy, i.e.
+ doesn't block ads or filter content.
+ </p>
+ <p>
+ Access to the toggle feature can <span class="emphasis"><i
+ class="EMPHASIS">not</i></span> be controlled separately by
+ <span class="QUOTE">"ACLs"</span> or HTTP authentication,
+ so that everybody who can access <span class=
+ "APPLICATION">Privoxy</span> (see <span class=
+ "QUOTE">"ACLs"</span> and <tt class=
+ "LITERAL">listen-address</tt> above) can toggle it for all
+ users. So this option is <span class="emphasis"><i class=
+ "EMPHASIS">not recommended</i></span> for multi-user
+ environments with untrusted users.
+ </p>
+ <p>
+ Note that malicious client side code (e.g Java) is also
+ capable of using this option.
+ </p>
+ <p>
+ As a lot of <span class="APPLICATION">Privoxy</span> users
+ don't read documentation, this feature is disabled by
+ default.
+ </p>
+ <p>
+ Note that you must have compiled <span class=
+ "APPLICATION">Privoxy</span> with support for this feature,
+ otherwise this option has no effect.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="ENABLE-REMOTE-HTTP-TOGGLE">7.4.4.
+ enable-remote-http-toggle</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Whether or not Privoxy recognizes special HTTP headers to
+ change its behaviour.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ 0 or 1
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ 0
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Privoxy ignores special HTTP headers.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ When toggled on, the client can change <span class=
+ "APPLICATION">Privoxy's</span> behaviour by setting special
+ HTTP headers. Currently the only supported special header
+ is <span class="QUOTE">"X-Filter: No"</span>, to disable
+ filtering for the ongoing request, even if it is enabled in
+ one of the action files.
+ </p>
+ <p>
+ This feature is disabled by default. If you are using <span
+ class="APPLICATION">Privoxy</span> in a environment with
+ trusted clients, you may enable this feature at your
+ discretion. Note that malicious client side code (e.g Java)
+ is also capable of using this feature.
+ </p>
+ <p>
+ This option will be removed in future releases as it has
+ been obsoleted by the more general header taggers.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="ENABLE-EDIT-ACTIONS">7.4.5. enable-edit-actions</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Whether or not the <a href=
+ "http://config.privoxy.org/show-status" target=
+ "_top">web-based actions file editor</a> may be used
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ 0 or 1
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ 0
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ The web-based actions file editor is disabled.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ Access to the editor can <span class="emphasis"><i class=
+ "EMPHASIS">not</i></span> be controlled separately by <span
+ class="QUOTE">"ACLs"</span> or HTTP authentication, so that
+ everybody who can access <span class=
+ "APPLICATION">Privoxy</span> (see <span class=
+ "QUOTE">"ACLs"</span> and <tt class=
+ "LITERAL">listen-address</tt> above) can modify its
+ configuration for all users.
+ </p>
+ <p>
+ This option is <span class="emphasis"><i class=
+ "EMPHASIS">not recommended</i></span> for environments with
+ untrusted users and as a lot of <span class=
+ "APPLICATION">Privoxy</span> users don't read
+ documentation, this feature is disabled by default.
+ </p>
+ <p>
+ Note that malicious client side code (e.g Java) is also
+ capable of using the actions editor and you shouldn't
+ enable this options unless you understand the consequences
+ and are sure your browser is configured correctly.
+ </p>
+ <p>
+ Note that you must have compiled <span class=
+ "APPLICATION">Privoxy</span> with support for this feature,
+ otherwise this option has no effect.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="ENFORCE-BLOCKS">7.4.6. enforce-blocks</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Whether the user is allowed to ignore blocks and can <span
+ class="QUOTE">"go there anyway"</span>.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ <tt class="REPLACEABLE"><i>0 or 1</i></tt>
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ <span class="emphasis"><i class="EMPHASIS">0</i></span>
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Blocks are not enforced.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ <span class="APPLICATION">Privoxy</span> is mainly used to
+ block and filter requests as a service to the user, for
+ example to block ads and other junk that clogs the pipes.
+ <span class="APPLICATION">Privoxy's</span> configuration
+ isn't perfect and sometimes innocent pages are blocked. In
+ this situation it makes sense to allow the user to enforce
+ the request and have <span class=
+ "APPLICATION">Privoxy</span> ignore the block.
+ </p>
+ <p>
+ In the default configuration <span class=
+ "APPLICATION">Privoxy's</span> <span class=
+ "QUOTE">"Blocked"</span> page contains a <span class=
+ "QUOTE">"go there anyway"</span> link to adds a special
+ string (the force prefix) to the request URL. If that link
+ is used, <span class="APPLICATION">Privoxy</span> will
+ detect the force prefix, remove it again and let the
+ request pass.
+ </p>
+ <p>
+ Of course <span class="APPLICATION">Privoxy</span> can also
+ be used to enforce a network policy. In that case the user
+ obviously should not be able to bypass any blocks, and
+ that's what the <span class="QUOTE">"enforce-blocks"</span>
+ option is for. If it's enabled, <span class=
+ "APPLICATION">Privoxy</span> hides the <span class=
+ "QUOTE">"go there anyway"</span> link. If the user adds the
+ force prefix by hand, it will not be accepted and the
+ circumvention attempt is logged.
+ </p>
+ </dd>
+ <dt>
+ Examples:
+ </dt>
+ <dd>
+ <p>
+ enforce-blocks 1
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="ACLS">7.4.7. ACLs: permit-access and deny-access</a>
+ </h4>
+ <a name="PERMIT-ACCESS"></a><a name="DENY-ACCESS"></a>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Who can access what.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ <tt class="REPLACEABLE"><i>src_addr</i></tt>[:<tt class=
+ "REPLACEABLE"><i>port</i></tt>][/<tt class=
+ "REPLACEABLE"><i>src_masklen</i></tt>] [<tt class=
+ "REPLACEABLE"><i>dst_addr</i></tt>[:<tt class=
+ "REPLACEABLE"><i>port</i></tt>][/<tt class=
+ "REPLACEABLE"><i>dst_masklen</i></tt>]]
+ </p>
+ <p>
+ Where <tt class="REPLACEABLE"><i>src_addr</i></tt> and <tt
+ class="REPLACEABLE"><i>dst_addr</i></tt> are IPv4 addresses
+ in dotted decimal notation or valid DNS names, <tt class=
+ "REPLACEABLE"><i>port</i></tt> is a port number, and <tt
+ class="REPLACEABLE"><i>src_masklen</i></tt> and <tt class=
+ "REPLACEABLE"><i>dst_masklen</i></tt> are subnet masks in
+ CIDR notation, i.e. integer values from 2 to 30
+ representing the length (in bits) of the network address.
+ The masks and the whole destination part are optional.
+ </p>
+ <p>
+ If your system implements <a href=
+ "http://tools.ietf.org/html/rfc3493" target="_top">RFC
+ 3493</a>, then <tt class="REPLACEABLE"><i>src_addr</i></tt>
+ and <tt class="REPLACEABLE"><i>dst_addr</i></tt> can be
+ IPv6 addresses delimeted by brackets, <tt class=
+ "REPLACEABLE"><i>port</i></tt> can be a number or a service
+ name, and <tt class="REPLACEABLE"><i>src_masklen</i></tt>
+ and <tt class="REPLACEABLE"><i>dst_masklen</i></tt> can be
+ a number from 0 to 128.
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ <span class="emphasis"><i class="EMPHASIS">Unset</i></span>
+ </p>
+ <p>
+ If no <tt class="REPLACEABLE"><i>port</i></tt> is
+ specified, any port will match. If no <tt class=
+ "REPLACEABLE"><i>src_masklen</i></tt> or <tt class=
+ "REPLACEABLE"><i>src_masklen</i></tt> is given, the
+ complete IP address has to match (i.e. 32 bits for IPv4 and
+ 128 bits for IPv6).
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Don't restrict access further than implied by <tt class=
+ "LITERAL">listen-address</tt>
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ Access controls are included at the request of ISPs and
+ systems administrators, and <span class="emphasis"><i
+ class="EMPHASIS">are not usually needed by individual
+ users</i></span>. For a typical home user, it will normally
+ suffice to ensure that <span class=
+ "APPLICATION">Privoxy</span> only listens on the localhost
+ (127.0.0.1) or internal (home) network address by means of
+ the <a href="config.html#LISTEN-ADDRESS"><span class=
+ "emphasis"><i class=
+ "EMPHASIS">listen-address</i></span></a> option.
+ </p>
+ <p>
+ Please see the warnings in the FAQ that <span class=
+ "APPLICATION">Privoxy</span> is not intended to be a
+ substitute for a firewall or to encourage anyone to defer
+ addressing basic security weaknesses.
+ </p>
+ <p>
+ Multiple ACL lines are OK. If any ACLs are specified, <span
+ class="APPLICATION">Privoxy</span> only talks to IP
+ addresses that match at least one <tt class=
+ "LITERAL">permit-access</tt> line and don't match any
+ subsequent <tt class="LITERAL">deny-access</tt> line. In
+ other words, the last match wins, with the default being
+ <tt class="LITERAL">deny-access</tt>.
+ </p>
+ <p>
+ If <span class="APPLICATION">Privoxy</span> is using a
+ forwarder (see <tt class="LITERAL">forward</tt> below) for
+ a particular destination URL, the <tt class=
+ "REPLACEABLE"><i>dst_addr</i></tt> that is examined is the
+ address of the forwarder and <span class="emphasis"><i
+ class="EMPHASIS">NOT</i></span> the address of the ultimate
+ target. This is necessary because it may be impossible for
+ the local <span class="APPLICATION">Privoxy</span> to
+ determine the IP address of the ultimate target (that's
+ often what gateways are used for).
+ </p>
+ <p>
+ You should prefer using IP addresses over DNS names,
+ because the address lookups take time. All DNS names must
+ resolve! You can <span class="emphasis"><i class=
+ "EMPHASIS">not</i></span> use domain patterns like <span
+ class="QUOTE">"*.org"</span> or partial domain names. If a
+ DNS name resolves to multiple IP addresses, only the first
+ one is used.
+ </p>
+ <p>
+ Some systems allow IPv4 clients to connect to IPv6 server
+ sockets. Then the client's IPv4 address will be translated
+ by the system into IPv6 address space with special prefix
+ ::ffff:0:0/96 (so called IPv4 mapped IPv6 address). <span
+ class="APPLICATION">Privoxy</span> can handle it and maps
+ such ACL addresses automatically.
+ </p>
+ <p>
+ Denying access to particular sites by ACL may have
+ undesired side effects if the site in question is hosted on
+ a machine which also hosts other sites (most sites are).
+ </p>
+ </dd>
+ <dt>
+ Examples:
+ </dt>
+ <dd>
+ <p>
+ Explicitly define the default behavior if no ACL and <tt
+ class="LITERAL">listen-address</tt> are set: <span class=
+ "QUOTE">"localhost"</span> is OK. The absence of a <tt
+ class="REPLACEABLE"><i>dst_addr</i></tt> implies that <span
+ class="emphasis"><i class="EMPHASIS">all</i></span>
+ destination addresses are OK:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="SCREEN">
+ permit-access localhost
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Allow any host on the same class C subnet as
+ www.privoxy.org access to nothing but www.example.com (or
+ other domains hosted on the same system):
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="SCREEN">
+ permit-access www.privoxy.org/24 www.example.com/32
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Allow access from any host on the 26-bit subnet
+ 192.168.45.64 to anywhere, with the exception that
+ 192.168.45.73 may not access the IP address behind
+ www.dirty-stuff.example.com:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="SCREEN">
+ permit-access 192.168.45.64/26
+ deny-access 192.168.45.73 www.dirty-stuff.example.com
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Allow access from the IPv4 network 192.0.2.0/24 even if
+ listening on an IPv6 wild card address (not supported on
+ all platforms):
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="PROGRAMLISTING">
+ permit-access 192.0.2.0/24
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ This is equivalent to the following line even if listening
+ on an IPv4 address (not supported on all platforms):
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="PROGRAMLISTING">
+ permit-access [::ffff:192.0.2.0]/120
+</pre>
+ </td>
+ </tr>
+ </table>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="BUFFER-LIMIT">7.4.8. buffer-limit</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ Maximum size of the buffer for content filtering.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ Size in Kbytes
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ 4096
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Use a 4MB (4096 KB) limit.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ For content filtering, i.e. the <tt class=
+ "LITERAL">+filter</tt> and <tt class=
+ "LITERAL">+deanimate-gif</tt> actions, it is necessary that
+ <span class="APPLICATION">Privoxy</span> buffers the entire
+ document body. This can be potentially dangerous, since a
+ server could just keep sending data indefinitely and wait
+ for your RAM to exhaust -- with nasty consequences. Hence
+ this option.
+ </p>
+ <p>
+ When a document buffer size reaches the <tt class=
+ "LITERAL">buffer-limit</tt>, it is flushed to the client
+ unfiltered and no further attempt to filter the rest of the
+ document is made. Remember that there may be multiple
+ threads running, which might require up to <tt class=
+ "LITERAL">buffer-limit</tt> Kbytes <span class=
+ "emphasis"><i class="EMPHASIS">each</i></span>, unless you
+ have enabled <span class="QUOTE">"single-threaded"</span>
+ above.
+ </p>
+ </dd>
+ </dl>
+ </div>
+ </div>
+ </div>
+ <div class="SECT2">
+ <h2 class="SECT2">
+ <a name="FORWARDING">7.5. Forwarding</a>
+ </h2>
+ <p>
+ This feature allows routing of HTTP requests through a chain of
+ multiple proxies.
+ </p>
+ <p>
+ Forwarding can be used to chain Privoxy with a caching proxy to
+ speed up browsing. Using a parent proxy may also be necessary if
+ the machine that <span class="APPLICATION">Privoxy</span> runs on
+ has no direct Internet access.
+ </p>
+ <p>
+ Note that parent proxies can severely decrease your privacy level.
+ For example a parent proxy could add your IP address to the request
+ headers and if it's a caching proxy it may add the <span class=
+ "QUOTE">"Etag"</span> header to revalidation requests again, even
+ though you configured Privoxy to remove it. It may also ignore
+ Privoxy's header time randomization and use the original values
+ which could be used by the server as cookie replacement to track
+ your steps between visits.
+ </p>
+ <p>
+ Also specified here are SOCKS proxies. <span class=
+ "APPLICATION">Privoxy</span> supports the SOCKS 4 and SOCKS 4A
+ protocols.
+ </p>
+ <div class="SECT3">
+ <h4 class="SECT3">
+ <a name="FORWARD">7.5.1. forward</a>
+ </h4>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>
+ Specifies:
+ </dt>
+ <dd>
+ <p>
+ To which parent HTTP proxy specific requests should be
+ routed.
+ </p>
+ </dd>
+ <dt>
+ Type of value:
+ </dt>
+ <dd>
+ <p>
+ <tt class="REPLACEABLE"><i>target_pattern</i></tt> <tt
+ class="REPLACEABLE"><i>http_parent</i></tt>[:<tt class=
+ "REPLACEABLE"><i>port</i></tt>]
+ </p>
+ <p>
+ where <tt class="REPLACEABLE"><i>target_pattern</i></tt> is
+ a <a href="actions-file.html#AF-PATTERNS">URL pattern</a>
+ that specifies to which requests (i.e. URLs) this forward
+ rule shall apply. Use <tt class="LITERAL">/</tt> to denote
+ <span class="QUOTE">"all URLs"</span>. <tt class=
+ "REPLACEABLE"><i>http_parent</i></tt>[:<tt class=
+ "REPLACEABLE"><i>port</i></tt>] is the DNS name or IP
+ address of the parent HTTP proxy through which the requests
+ should be forwarded, optionally followed by its listening
+ port (default: 8000). Use a single dot (<tt class=
+ "LITERAL">.</tt>) to denote <span class="QUOTE">"no
+ forwarding"</span>.
+ </p>
+ </dd>
+ <dt>
+ Default value:
+ </dt>
+ <dd>
+ <p>
+ <span class="emphasis"><i class="EMPHASIS">Unset</i></span>
+ </p>
+ </dd>
+ <dt>
+ Effect if unset:
+ </dt>
+ <dd>
+ <p>
+ Don't use parent HTTP proxies.
+ </p>
+ </dd>
+ <dt>
+ Notes:
+ </dt>
+ <dd>
+ <p>
+ If <tt class="REPLACEABLE"><i>http_parent</i></tt> is <span
+ class="QUOTE">"."</span>, then requests are not forwarded
+ to another HTTP proxy but are made directly to the web
+ servers.
+ </p>
+ <p>
+ <tt class="REPLACEABLE"><i>http_parent</i></tt> can be a
+ numerical IPv6 address (if <a href=
+ "http://tools.ietf.org/html/rfc3493" target="_top">RFC
+ 3493</a> is implemented). To prevent clashes with the port
+ delimiter, the whole IP address has to be put into
+ brackets. On the other hand a <tt class=
+ "REPLACEABLE"><i>target_pattern</i></tt> containing an IPv6
+ address has to be put into angle brackets (normal brackets
+ are reserved for regular expressions already).
+ </p>
+ <p>
+ Multiple lines are OK, they are checked in sequence, and
+ the last match wins.
+ </p>
+ </dd>
+ <dt>
+ Examples:
+ </dt>
+ <dd>
+ <p>
+ Everything goes to an example parent proxy, except SSL on
+ port 443 (which it doesn't handle):
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="SCREEN">
+ forward / parent-proxy.example.org:8080
+ forward :443 .
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Everything goes to our example ISP's caching proxy, except
+ for requests to that ISP's sites:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="SCREEN">
+ forward / caching-proxy.isp.example.net:8000
+ forward .isp.example.net .
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Parent proxy specified by an IPv6 address:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="PROGRAMLISTING">
+ forward / [2001:DB8::1]:8000
+</pre>
+ </td>
+ </tr>
+ </table>
+
+ <p>
+ Suppose your parent proxy doesn't support IPv6:
+ </p>
+ <p>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="90%">
+ <tr>
+ <td>
+<pre class="PROGRAMLISTING">
+ forward / parent-proxy.example.org:8000
projects / privoxy.git / commitdiff