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->Privoxy 3.0.5 User Manual</TH
+>Privoxy 3.0.10 User Manual</TH
></TR
><TR
><TD
CLASS="SECT1"
><A
NAME="CONFIG"
-></A
->7. The Main Configuration File</H1
+>7. The Main Configuration File</A
+></H1
><P
> Again, the main configuration file is named <TT
CLASS="FILENAME"
CLASS="SECT2"
><A
NAME="LOCAL-SET-UP"
-></A
->7.1. Local Set-up Documentation</H2
+>7.1. Local Set-up Documentation</A
+></H2
><P
> If you intend to operate <SPAN
CLASS="APPLICATION"
CLASS="SECT3"
><A
NAME="USER-MANUAL"
-></A
->7.1.1. user-manual</H4
+>7.1.1. user-manual</A
+></H4
><P
></P
><DIV
>
</P
><P
-> The User Manual is then available to anyone with access to the proxy, by
- following the built-in URL: <TT
+> The User Manual is then available to anyone with access to
+ <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>, by following the built-in URL:
+ <TT
CLASS="LITERAL"
>http://config.privoxy.org/user-manual/</TT
>
CLASS="SECT3"
><A
NAME="TRUST-INFO-URL"
-></A
->7.1.2. trust-info-url</H4
+>7.1.2. trust-info-url</A
+></H4
><P
></P
><DIV
>Default value:</DT
><DD
><P
->Two example URL are provided</P
+>Two example URLs are provided</P
></DD
><DT
>Effect if unset:</DT
>trustfile</I
></SPAN
></A
-> above.)
+> below.)
</P
><P
> If you use the trust mechanism, it is a good idea to write up some on-line
CLASS="SECT3"
><A
NAME="ADMIN-ADDRESS"
-></A
->7.1.3. admin-address</H4
+>7.1.3. admin-address</A
+></H4
><P
></P
><DIV
>Specifies:</DT
><DD
><P
-> An email address to reach the proxy administrator.
+> An email address to reach the <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> administrator.
</P
></DD
><DT
CLASS="SECT3"
><A
NAME="PROXY-INFO-URL"
-></A
->7.1.4. proxy-info-url</H4
+>7.1.4. proxy-info-url</A
+></H4
><P
></P
><DIV
CLASS="SECT2"
><A
NAME="CONF-LOG-LOC"
-></A
->7.2. Configuration and Log File Locations</H2
+>7.2. Configuration and Log File Locations</A
+></H2
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT3"
><A
NAME="CONFDIR"
-></A
->7.2.1. confdir</H4
+>7.2.1. confdir</A
+></H4
><P
></P
><DIV
>Specifies:</DT
><DD
><P
->The directory where the other configuration files are located</P
+>The directory where the other configuration files are located.</P
></DD
><DT
>Type of value:</DT
CLASS="LITERAL"
>/</TT
>"</SPAN
->, please
+>, please.
+ </P
+></DD
+></DL
+></DIV
+></DIV
+><DIV
+CLASS="SECT3"
+><H4
+CLASS="SECT3"
+><A
+NAME="TEMPLDIR"
+>7.2.2. templdir</A
+></H4
+><P
+></P
+><DIV
+CLASS="VARIABLELIST"
+><DL
+><DT
+>Specifies:</DT
+><DD
+><P
+>An alternative directory where the templates are loaded from.</P
+></DD
+><DT
+>Type of value:</DT
+><DD
+><P
+>Path name</P
+></DD
+><DT
+>Default value:</DT
+><DD
+><P
+>unset</P
+></DD
+><DT
+>Effect if unset:</DT
+><DD
+><P
+>The templates are assumed to be located in confdir/template.</P
+></DD
+><DT
+>Notes:</DT
+><DD
+><P
+> <SPAN
+CLASS="APPLICATION"
+>Privoxy's</SPAN
+> original templates are usually
+ overwritten with each update. Use this option to relocate customized
+ templates that should be kept. As template variables might change
+ between updates, you shouldn't expect templates to work with
+ <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> releases other than the one
+ they were part of, though.
</P
></DD
></DL
CLASS="SECT3"
><A
NAME="LOGDIR"
-></A
->7.2.2. logdir</H4
+>7.2.3. logdir</A
+></H4
><P
></P
><DIV
>Specifies:</DT
><DD
><P
-> The directory where all logging takes place (i.e. where <TT
+> The directory where all logging takes place
+ (i.e. where <TT
CLASS="FILENAME"
>logfile</TT
-> and
+> and
<TT
CLASS="FILENAME"
>jarfile</TT
-> are located)
+> are located).
</P
></DD
><DT
CLASS="LITERAL"
>/</TT
>"</SPAN
->, please
+>, please.
</P
></DD
></DL
CLASS="SECT3"
><A
NAME="ACTIONSFILE"
-></A
->7.2.3. actionsfile</H4
+>7.2.4. actionsfile</A
+></H4
><A
NAME="DEFAULT.ACTION"
></A
>Type of value:</DT
><DD
><P
->File name, relative to <TT
+>Complete file name, relative to <TT
CLASS="LITERAL"
>confdir</TT
->, without the <TT
-CLASS="LITERAL"
->.action</TT
-> suffix</P
+></P
></DD
><DT
>Default values:</DT
><TD
> <P
CLASS="LITERALLAYOUT"
-> standard # Internal purposes, no editing recommended</P
+> standard.action # Internal purposes, no editing recommended</P
>
</TD
></TR
><TD
> <P
CLASS="LITERALLAYOUT"
-> default # Main actions file</P
+> default.action # Main actions file</P
>
</TD
></TR
><TD
> <P
CLASS="LITERALLAYOUT"
-> user # User customizations</P
+> user.action # User customizations</P
>
</TD
></TR
>Effect if unset:</DT
><DD
><P
-> No actions are taken at all. Simple neutral proxying.
+> No actions are taken at all. More or less neutral proxying.
</P
></DD
><DT
</P
><P
>
- The default values include standard.action, which is used for internal
- purposes and should be loaded, default.action, which is the
- <SPAN
+ The default values include <TT
+CLASS="FILENAME"
+>standard.action</TT
+>, which is used
+ for internal purposes and should be loaded, <TT
+CLASS="FILENAME"
+>default.action</TT
+>,
+ which is the <SPAN
CLASS="QUOTE"
>"main"</SPAN
> actions file maintained by the developers, and
</P
><P
>
- Actions files are where all the per site and per URL configuration is done for
+ Actions files contain all the per site and per URL configuration for
ad blocking, cookie management, privacy considerations, etc.
There is no point in using <SPAN
CLASS="APPLICATION"
> without at
least one actions file.
</P
+><P
+> Note that since Privoxy 3.0.7, the complete filename, including the <SPAN
+CLASS="QUOTE"
+>".action"</SPAN
+>
+ extension has to be specified. The syntax change was necessary to be consistent
+ with the other file options and to allow previously forbidden characters.
+ </P
></DD
></DL
></DIV
CLASS="SECT3"
><A
NAME="FILTERFILE"
-></A
->7.2.4. filterfile</H4
+>7.2.5. filterfile</A
+></H4
><A
NAME="DEFAULT.FILTER"
></A
>regular expressions</A
>. These rules permit
powerful changes on the content of Web pages, and optionally the headers
- as well, e.g., you could disable your favorite JavaScript annoyances,
+ as well, e.g., you could try to disable your favorite JavaScript annoyances,
re-write the actual displayed text, or just have some fun
playing buzzword bingo with web pages.
</P
CLASS="SECT3"
><A
NAME="LOGFILE"
-></A
->7.2.5. logfile</H4
+>7.2.6. logfile</A
+></H4
><P
></P
><DIV
>Default value:</DT
><DD
><P
->logfile (Unix) <SPAN
+><SPAN
+CLASS="emphasis"
+><I
+CLASS="EMPHASIS"
+>Unset (commented out)</I
+></SPAN
+>. When activated: logfile (Unix) <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>or</I
></SPAN
-> privoxy.log (Windows)</P
+> privoxy.log (Windows).</P
></DD
><DT
>Effect if unset:</DT
><DD
><P
-> No log file is used, all log messages go to the console (<TT
-CLASS="LITERAL"
->STDERR</TT
->).
+> No logfile is written.
</P
></DD
><DT
CLASS="APPLICATION"
>Privoxy</SPAN
> (e.g., it's not blocking an ad you
- think it should block) but in most cases you probably will never look at it.
+ think it should block) and it can help you to monitor what your browser
+ is doing.
+ </P
+><P
+> Depending on the debug options below, the logfile may be a privacy risk
+ if third parties can get access to it. As most users will never look
+ at it, <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> 3.0.7 and later only log fatal
+ errors by default.
+ </P
+><P
+> For most troubleshooting purposes, you will have to change that,
+ please refer to the debugging section for details.
</P
><P
> Your logfile will grow indefinitely, and you will probably want to
(see <SPAN
CLASS="QUOTE"
>"man cron"</SPAN
->). For Red Hat, a <B
+>). For Red Hat based Linux distributions, a
+ <B
CLASS="COMMAND"
>logrotate</B
->
- script has been included.
- </P
-><P
-> On SuSE Linux systems, you can place a line like <SPAN
-CLASS="QUOTE"
->"/var/log/privoxy.*
- +1024k 644 nobody.nogroup"</SPAN
-> in <TT
-CLASS="FILENAME"
->/etc/logfiles</TT
->, with
- the effect that cron.daily will automatically archive, gzip, and empty the
- log, when it exceeds 1M size.
+> script has been included.
</P
><P
> Any log files must be writable by whatever user <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
>
- is being run as (default on UNIX, user id is <SPAN
+ is being run as (on Unix, default user id is <SPAN
CLASS="QUOTE"
>"privoxy"</SPAN
>).
CLASS="SECT3"
><A
NAME="JARFILE"
-></A
->7.2.6. jarfile</H4
+>7.2.7. jarfile</A
+></H4
><P
></P
><DIV
>Default value:</DT
><DD
><P
->Unset (commented out). When activated: jarfile (Unix) <SPAN
+><SPAN
+CLASS="emphasis"
+><I
+CLASS="EMPHASIS"
+>Unset (commented out)</I
+></SPAN
+>. When activated: jarfile (Unix) <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>or</I
></SPAN
-> privoxy.jar (Windows)</P
+> privoxy.jar (Windows).</P
></DD
><DT
>Effect if unset:</DT
</P
><P
> If debug 8 (show header parsing) is enabled, cookies are
- written to the logfile with the rest of the headers.
+ also written to the logfile with the rest of the headers.
+ Therefore this option isn't very useful and may be removed
+ in future releases. Please report to the developers if you
+ are still using it.
</P
></DD
></DL
CLASS="SECT3"
><A
NAME="TRUSTFILE"
-></A
->7.2.7. trustfile</H4
+>7.2.8. trustfile</A
+></H4
><P
></P
><DIV
CLASS="SECT2"
><A
NAME="DEBUGGING"
-></A
->7.3. Debugging</H2
+>7.3. Debugging</A
+></H2
><P
> These options are mainly useful when tracing a problem.
Note that you might also want to invoke
CLASS="SECT3"
><A
NAME="DEBUG"
-></A
->7.3.1. debug</H4
+>7.3.1. debug</A
+></H4
><P
></P
><DIV
>Specifies:</DT
><DD
><P
-> Key values that determine what information gets logged to the
- <A
-HREF="config.html#LOGFILE"
-><SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->logfile</I
-></SPAN
-></A
->.
+> Key values that determine what information gets logged.
</P
></DD
><DT
>Default value:</DT
><DD
><P
->12289 (i.e.: URLs plus informational and warning messages)</P
+>0 (i.e.: only fatal errors (that cause Privoxy to exit) are logged)</P
></DD
><DT
>Effect if unset:</DT
><DD
><P
-> Nothing gets logged.
+> Default value is used (see above).
</P
></DD
><DT
><TD
><PRE
CLASS="PROGRAMLISTING"
-> debug 1 # show each GET/POST/CONNECT request
- debug 2 # show each connection status
- debug 4 # show I/O status
- debug 8 # show header parsing
- debug 16 # log all data into the logfile
- debug 32 # debug force feature
- debug 64 # debug regular expression filter
- debug 128 # debug fast redirects
- debug 256 # debug GIF de-animation
- debug 512 # Common Log Format
- debug 1024 # debug kill pop-ups
- debug 2048 # CGI user interface
- debug 4096 # Startup banner and warnings.
- debug 8192 # Non-fatal errors</PRE
+> debug 1 # log each request destination (and the crunch reason if <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> intercepted the request)
+ debug 2 # show each connection status
+ debug 4 # show I/O status
+ debug 8 # show header parsing
+ debug 16 # log all data written to the network into the logfile
+ debug 32 # debug force feature
+ debug 64 # debug regular expression filters
+ debug 128 # debug redirects
+ debug 256 # debug GIF de-animation
+ debug 512 # Common Log Format
+ debug 2048 # CGI user interface
+ debug 4096 # Startup banner and warnings.
+ debug 8192 # Non-fatal errors</PRE
></TD
></TR
></TABLE
CLASS="emphasis"
><I
CLASS="EMPHASIS"
->1, 4096 and 8192 are highly recommended</I
+>1, 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).
+ 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
-> The reporting of <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->fatal</I
-></SPAN
-> errors (i.e. ones which crash
- <SPAN
+> <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
->) is always on and cannot be disabled.
+> 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 CLF (Common Log Format), you should set <SPAN
+> If you want to use pure CLF (Common Log Format), you should set <SPAN
CLASS="QUOTE"
>"debug
512"</SPAN
></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
CLASS="SECT3"
><A
NAME="SINGLE-THREADED"
-></A
->7.3.2. single-threaded</H4
+>7.3.2. single-threaded</A
+></H4
><P
></P
><DIV
>Specifies:</DT
><DD
><P
-> Whether to run only one server thread
+> Whether to run only one server thread.
</P
></DD
><DT
>Notes:</DT
><DD
><P
-> This option is only there for debug purposes and you should never
- need to use it. <SPAN
+> This option is only there for debugging purposes.
+ <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
></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"
CLASS="SECT2"
><A
NAME="ACCESS-CONTROL"
-></A
->7.4. Access Control and Security</H2
+>7.4. Access Control and Security</A
+></H2
><P
> This section of the config file controls the security-relevant aspects
of <SPAN
CLASS="SECT3"
><A
NAME="LISTEN-ADDRESS"
-></A
->7.4.1. listen-address</H4
+>7.4.1. listen-address</A
+></H4
><P
></P
><DIV
CLASS="APPLICATION"
>Privoxy</SPAN
> to untrusted users, you will
- also want to turn off the <TT
+ also want to make sure that the following actions are disabled: <TT
CLASS="LITERAL"
><A
HREF="config.html#ENABLE-EDIT-ACTIONS"
>enable-remote-toggle</A
></TT
>
- options!
</P
></DD
><DT
CLASS="SECT3"
><A
NAME="TOGGLE"
-></A
->7.4.2. toggle</H4
+>7.4.2. toggle</A
+></H4
><P
></P
><DIV
<SPAN
CLASS="QUOTE"
>"toggled off"</SPAN
-> mode, i.e. behave like a normal, content-neutral
- proxy where all ad blocking, filtering, etc are disabled. See
- <TT
+> 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. This is not really useful
- anymore, since toggling is much easier via <A
-HREF="http://config.privoxy.org/toggle"
-TARGET="_top"
->the web interface</A
-> than via
- editing the <TT
-CLASS="FILENAME"
->conf</TT
-> file.
+> below.
</P
><P
> The windows version will only display the toggle icon in the system tray
CLASS="SECT3"
><A
NAME="ENABLE-REMOTE-TOGGLE"
-></A
->7.4.3. enable-remote-toggle</H4
+>7.4.3. enable-remote-toggle</A
+></H4
><P
></P
><DIV
>Default value:</DT
><DD
><P
->1</P
+>0</P
></DD
><DT
>Effect if unset:</DT
> When toggled off, <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> acts like a normal,
- content-neutral proxy, i.e. it acts as if none of the actions applied to
- any URL.
+> mostly acts like a normal,
+ content-neutral proxy, i.e. doesn't block ads or filter content.
</P
><P
-> For the time being, access to the toggle feature can <SPAN
+> Access to the toggle feature can <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
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
CLASS="SECT3"
><A
NAME="ENABLE-REMOTE-HTTP-TOGGLE"
-></A
->7.4.4. enable-remote-http-toggle</H4
+>7.4.4. enable-remote-http-toggle</A
+></H4
><P
></P
><DIV
>Default value:</DT
><DD
><P
->1</P
+>0</P
></DD
><DT
>Effect if unset:</DT
the ongoing request, even if it is enabled in one of the action files.
</P
><P
-> If you are using <SPAN
+> This feature is disabled by default. If you are using
+ <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> in a
- multi-user environment or with untrustworthy clients and want to
- enforce filtering, you will have to disable this option,
- otherwise you can ignore it.
+> 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
CLASS="SECT3"
><A
NAME="ENABLE-EDIT-ACTIONS"
-></A
->7.4.5. enable-edit-actions</H4
+>7.4.5. enable-edit-actions</A
+></H4
><P
></P
><DIV
>Default value:</DT
><DD
><P
->1</P
+>0</P
></DD
><DT
>Effect if unset:</DT
>Notes:</DT
><DD
><P
-> For the time being, access to the editor can <SPAN
+> Access to the editor can <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
CLASS="LITERAL"
>listen-address</TT
> above) can
- modify its configuration for all users. So this option is <SPAN
+ modify its configuration for all users.
+ </P
+><P
+> This option is <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
->not
- recommended</I
+>not recommended</I
></SPAN
-> for multi-user environments with untrusted users.
+> 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
><H4
CLASS="SECT3"
><A
-NAME="ACLS"
-></A
->7.4.6. ACLs: permit-access and deny-access</H4
-><A
-NAME="PERMIT-ACCESS"
-></A
-><A
-NAME="DENY-ACCESS"
-></A
+NAME="ENFORCE-BLOCKS"
+>7.4.6. enforce-blocks</A
+></H4
><P
></P
><DIV
>Specifies:</DT
><DD
><P
-> Who can access what.
+> Whether the user is allowed to ignore blocks and can <SPAN
+CLASS="QUOTE"
+>"go there anyway"</SPAN
+>.
</P
></DD
><DT
> <TT
CLASS="REPLACEABLE"
><I
->src_addr</I
-></TT
->[/<TT
-CLASS="REPLACEABLE"
-><I
->src_masklen</I
-></TT
->]
- [<TT
-CLASS="REPLACEABLE"
-><I
->dst_addr</I
-></TT
->[/<TT
-CLASS="REPLACEABLE"
-><I
->dst_masklen</I
+>0 or 1</I
></TT
->]]
+>
</P
+></DD
+><DT
+>Default value:</DT
+><DD
><P
-> Where <TT
-CLASS="REPLACEABLE"
+><SPAN
+CLASS="emphasis"
><I
->src_addr</I
-></TT
-> and
- <TT
-CLASS="REPLACEABLE"
+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
+>src_masklen</I
+></TT
+>]
+ [<TT
+CLASS="REPLACEABLE"
+><I
+>dst_addr</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
option.
</P
><P
-> Please see the warnings in the FAQ that this proxy is not intended to be a substitute
- for a firewall or to encourage anyone to defer addressing basic security
- weaknesses.
+> 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, then the <SPAN
+ If any ACLs are specified, <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
->
- talks only to IP addresses that match at least one <TT
+> only talks
+ to IP addresses that match at least one <TT
CLASS="LITERAL"
>permit-access</TT
> line
</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.
+ if the site in question is hosted on a machine which also hosts other sites
+ (most sites are).
</P
></DD
><DT
</P
><P
> Allow any host on the same class C subnet as www.privoxy.org access to
- nothing but www.example.com:
+ nothing but www.example.com (or other domains hosted on the same system):
</P
><P
> <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 www.dirty-stuff.example.com:
+ with the exception that 192.168.45.73 may not access the IP address behind
+ www.dirty-stuff.example.com:
</P
><P
> <TABLE
CLASS="SECT3"
><A
NAME="BUFFER-LIMIT"
-></A
->7.4.7. buffer-limit</H4
+>7.4.8. buffer-limit</A
+></H4
><P
></P
><DIV
CLASS="SECT2"
><A
NAME="FORWARDING"
-></A
->7.5. Forwarding</H2
+>7.5. Forwarding</A
+></H2
><P
> This feature allows routing of HTTP requests through a chain of
- multiple proxies.
- It can be used to better protect privacy and confidentiality when
- accessing specific domains by routing requests to those domains
- through an anonymous public proxy. Or to use a caching proxy to speed up browsing. Or chaining to a parent
- proxy may be necessary because the machine that <SPAN
+ 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
>
- runs on has no direct Internet access.</P
+ 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"
CLASS="SECT3"
><A
NAME="FORWARD"
-></A
->7.5.1. forward</H4
+>7.5.1. forward</A
+></H4
><P
></P
><DIV
>Examples:</DT
><DD
><P
-> Everything goes to an example anonymizing proxy, except SSL on port 443 (which it doesn't handle):
+> Everything goes to an example parent proxy, except SSL on port 443 (which it doesn't handle):
</P
><P
> <TABLE
><TD
><PRE
CLASS="SCREEN"
-> forward / anon-proxy.example.org:8080
+> forward / parent-proxy.example.org:8080
forward :443 .</PRE
></TD
></TR
><TD
><PRE
CLASS="SCREEN"
-> forward / caching-proxy.example-isp.net:8000
- forward .example-isp.net .</PRE
+> forward / caching-proxy.isp.example.net:8000
+ forward .isp.example.net .</PRE
></TD
></TR
></TABLE
CLASS="SECT3"
><A
NAME="SOCKS"
-></A
->7.5.2. forward-socks4 and forward-socks4a</H4
+>7.5.2. forward-socks4, forward-socks4a and forward-socks5</A
+></H4
><A
NAME="FORWARD-SOCKS4"
></A
>Specifies:</DT
><DD
><P
-> Through which SOCKS proxy (and to which parent HTTP proxy) specific requests should be routed.
+> Through which SOCKS proxy (and optionally to which parent HTTP proxy) specific requests should be routed.
</P
></DD
><DT
><I
>target_pattern</I
></TT
-> is a <A
+> 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
+> 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
+>. <TT
CLASS="REPLACEABLE"
><I
>http_parent</I
></TT
-> and <TT
+>
+ and <TT
CLASS="REPLACEABLE"
><I
>socks_proxy</I
></TT
>
- are IP addresses in dotted decimal notation or valid DNS names (<TT
+ are IP addresses in dotted decimal notation or valid DNS names
+ (<TT
CLASS="REPLACEABLE"
><I
>http_parent</I
><I
>port</I
></TT
-> parameters are TCP ports, i.e. integer values from 1 to 64535
+> parameters are TCP ports,
+ i.e. integer values from 1 to 65535
</P
></DD
><DT
server, while in SOCKS 4 it happens locally.
</P
><P
+> With <TT
+CLASS="LITERAL"
+>forward-socks5</TT
+> the DNS resolution will happen on the remote server as well.
+ </P
+><P
> If <TT
CLASS="REPLACEABLE"
><I
><TD
><PRE
CLASS="SCREEN"
-> forward-socks4a / socks-gw.example.com:1080 www-cache.example-isp.net:8080
+> forward-socks4a / socks-gw.example.com:1080 www-cache.isp.example.net:8080
forward .example.com .</PRE
></TD
></TR
>
</P
><P
-> To chain Privoxy and Tor, both running on the same system, you should use
- the rule:
+> To chain Privoxy and Tor, both running on the same system, you would use
+ something like:
</P
><P
> <TABLE
><TD
><PRE
CLASS="SCREEN"
-> forward-socks4 / 127.0.0.1:9050 .</PRE
+> forward-socks4a / 127.0.0.1:9050 .</PRE
></TD
></TR
></TABLE
> The public <SPAN
CLASS="APPLICATION"
>Tor</SPAN
-> network can't be used to reach your local network,
- therefore it's a good idea to make some exceptions:
+> network can't be used to
+ reach your local network, if you need to access local servers you
+ therefore might want to make some exceptions:
</P
><P
> <TABLE
><P
> Unencrypted connections to systems in these address ranges will
be as (un)secure as the local network is, but the alternative is that you
- can't reach the network at all.
+ can't reach the local network through <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>
+ at all. Of course this may actually be desired and there is no reason
+ to make these exceptions if you aren't sure you need them.
</P
><P
> If you also want to be able to reach servers in your local network by
CLASS="SECT3"
><A
NAME="ADVANCED-FORWARDING-EXAMPLES"
-></A
->7.5.3. Advanced Forwarding Examples</H4
+>7.5.3. Advanced Forwarding Examples</A
+></H4
><P
> If you have links to multiple ISPs that provide various special content
only to their subscribers, you can configure multiple <SPAN
></SPAN
> users can see the internal content of all ISPs.</P
><P
-> Assume that host-a has a PPP connection to isp-a.net. And host-b has a PPP connection to
- isp-b.net. Both run <SPAN
+> Assume that host-a has a PPP connection to isp-a.example.net. And host-b has a PPP connection to
+ isp-b.example.org. Both run <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
>. Their forwarding
><PRE
CLASS="SCREEN"
> forward / .
- forward .isp-b.net host-b:8118</PRE
+ forward .isp-b.example.net host-b:8118</PRE
></TD
></TR
></TABLE
><PRE
CLASS="SCREEN"
> forward / .
- forward .isp-a.net host-a:8118</PRE
+ forward .isp-a.example.org host-a:8118</PRE
></TD
></TR
></TABLE
<SPAN
CLASS="APPLICATION"
>squid</SPAN
-> locally, then chain as
+> locally, then chaining as
<TT
CLASS="LITERAL"
>browser -> squid -> privoxy</TT
>squid.conf</TT
>.</P
><P
-> You could just as well decide to only forward requests for Windows executables through
- a virus-scanning parent proxy, say, on <TT
+> You could just as well decide to only forward requests you suspect
+ of leading to Windows executables through a virus-scanning parent proxy,
+ say, on <TT
CLASS="LITERAL"
>antivir.example.com</TT
>, port 8010:</P
CLASS="SECT3"
><A
NAME="FORWARDED-CONNECT-RETRIES"
-></A
->7.5.4. forwarded-connect-retries</H4
+>7.5.4. forwarded-connect-retries</A
+></H4
><P
></P
><DIV
>Effect if unset:</DT
><DD
><P
-> Forwarded connections are treated like direct connections and no retry attempts are made.
+> Connections forwarded through other proxies are treated like direct connections and no retry attempts are made.
</P
></DD
><DT
>forwarded-connect-retries</I
></TT
> is mainly interesting
- for socks4a connections, where Privoxy can't detect why the connections failed.
+ for socks4a connections, where <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> can't detect why the connections failed.
The connection might have failed because of a DNS timeout in which case a retry makes sense,
but it might also have failed because the server doesn't exist or isn't reachable. In this
case the retry will just delay the appearance of Privoxy's error message.
</P
><P
-> Only use this option, if you are getting many forwarding related error messages,
+> Note that in the context of this option, <SPAN
+CLASS="QUOTE"
+>"forwarded connections"</SPAN
+> includes all connections
+ that Privoxy forwards through other proxies. This option is not limited to the HTTP CONNECT method.
+ </P
+><P
+> Only use this option, if you are getting lots of forwarding-related error messages
that go away when you try again manually. Start with a small value and check Privoxy's
logfile from time to time, to see how many retries are usually needed.
</P
></DL
></DIV
></DIV
+><DIV
+CLASS="SECT3"
+><H4
+CLASS="SECT3"
+><A
+NAME="ACCEPT-INTERCEPTED-REQUESTS"
+>7.5.5. accept-intercepted-requests</A
+></H4
+><P
+></P
+><DIV
+CLASS="VARIABLELIST"
+><DL
+><DT
+>Specifies:</DT
+><DD
+><P
+> Whether intercepted requests should be treated as valid.
+ </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
+> Only proxy requests are accepted, intercepted requests are treated as invalid.
+ </P
+></DD
+><DT
+>Notes:</DT
+><DD
+><P
+> If you don't trust your clients and want to force them
+ to use <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>, enable this
+ option and configure your packet filter to redirect outgoing
+ HTTP connections into <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>.
+ </P
+><P
+> Make sure that <SPAN
+CLASS="APPLICATION"
+>Privoxy's</SPAN
+> own requests
+ aren't redirected as well. Additionally take care that
+ <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> can't intentionally connect
+ to itself, otherwise you could run into redirection loops if
+ <SPAN
+CLASS="APPLICATION"
+>Privoxy's</SPAN
+> listening port is reachable
+ by the outside or an attacker has access to the pages you visit.
+ </P
+></DD
+><DT
+>Examples:</DT
+><DD
+><P
+> accept-intercepted-requests 1
+ </P
+></DD
+></DL
+></DIV
+></DIV
+><DIV
+CLASS="SECT3"
+><H4
+CLASS="SECT3"
+><A
+NAME="ALLOW-CGI-REQUEST-CRUNCHING"
+>7.5.6. allow-cgi-request-crunching</A
+></H4
+><P
+></P
+><DIV
+CLASS="VARIABLELIST"
+><DL
+><DT
+>Specifies:</DT
+><DD
+><P
+> Whether requests to <SPAN
+CLASS="APPLICATION"
+>Privoxy's</SPAN
+> CGI pages can be blocked or redirected.
+ </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
+> <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> ignores block and redirect actions for its CGI pages.
+ </P
+></DD
+><DT
+>Notes:</DT
+><DD
+><P
+> By default <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> ignores block or redirect actions
+ for its CGI pages. Intercepting these requests can be useful in multi-user
+ setups to implement fine-grained access control, but it can also render the complete
+ web interface useless and make debugging problems painful if done without care.
+ </P
+><P
+> Don't enable this option unless you're sure that you really need it.
+ </P
+></DD
+><DT
+>Examples:</DT
+><DD
+><P
+> allow-cgi-request-crunching 1
+ </P
+></DD
+></DL
+></DIV
+></DIV
+><DIV
+CLASS="SECT3"
+><H4
+CLASS="SECT3"
+><A
+NAME="SPLIT-LARGE-FORMS"
+>7.5.7. split-large-forms</A
+></H4
+><P
+></P
+><DIV
+CLASS="VARIABLELIST"
+><DL
+><DT
+>Specifies:</DT
+><DD
+><P
+> Whether the CGI interface should stay compatible with broken HTTP clients.
+ </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
+> The CGI form generate long GET URLs.
+ </P
+></DD
+><DT
+>Notes:</DT
+><DD
+><P
+> <SPAN
+CLASS="APPLICATION"
+>Privoxy's</SPAN
+> CGI forms can lead to
+ rather long URLs. This isn't a problem as far as the HTTP
+ standard is concerned, but it can confuse clients with arbitrary
+ URL length limitations.
+ </P
+><P
+> Enabling split-large-forms causes <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+>
+ to divide big forms into smaller ones to keep the URL length down.
+ It makes editing a lot less convenient and you can no longer
+ submit all changes at once, but at least it works around this
+ browser bug.
+ </P
+><P
+> If you don't notice any editing problems, there is no reason
+ to enable this option, but if one of the submit buttons appears
+ to be broken, you should give it a try.
+ </P
+></DD
+><DT
+>Examples:</DT
+><DD
+><P
+> split-large-forms 1
+ </P
+></DD
+></DL
+></DIV
+></DIV
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="WINDOWS-GUI"
-></A
->7.6. Windows GUI Options</H2
+>7.6. Windows GUI Options</A
+></H2
><P
> <SPAN
CLASS="APPLICATION"
<SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> will disconnect from and hide the
+> will disconnect from and hide the
command console.</P
><P
> <TT
projects / privoxy.git / blobdiff