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-><BODY
-CLASS="SECT1"
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->Privoxy Frequently Asked Questions</TH
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-><A
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-ACCESSKEY="P"
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-><DIV
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-><A
-NAME="CONFIGURATION"
->3. Configuration</A
-></H1
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN358"
->3.1. What exactly is an <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> file?</A
-></H3
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> utilizes the concept of <SPAN
-CLASS="QUOTE"
->" <A
-HREF="../user-manual/actions-file.html#ACTIONS"
-TARGET="_top"
->actions</A
->"</SPAN
->
- that are used to manipulate and control web page data.
- <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->Actions files</A
->
- are where these <A
-HREF="../user-manual/actions-file.html#ACTIONS"
-TARGET="_top"
->actions</A
->
- that <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> could take while processing a certain
- request, are configured. Typically, you would define a set of default actions
- that apply globally to all URLs, then add exceptions to these defaults where needed.
- There is a wide array of actions available that give the user a high degree
- of control and flexibility on how to process each and every web page.</P
-><P
-> Actions can be defined on a <A
-HREF="../user-manual/actions-file.html#AF-PATTERNS"
-TARGET="_top"
->URL pattern</A
-> basis, i.e.
- for single URLs, whole web sites, groups or parts thereof etc. Actions can also be
- grouped together and then applied to requests matching one or more patterns.
- There are many possible actions that might apply to any given site. As an example,
- if you are blocking <A
-HREF="http://en.wikipedia.org/wiki/Browser_cookie"
-TARGET="_top"
->cookies</A
->
- as one of your default actions, but need to accept cookies from a given site,
- you would need to define an exception for this site in one of your actions
- files, preferably in <TT
-CLASS="FILENAME"
->user.action</TT
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="ACTIONSS"
->3.2. The <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> concept confuses me. Please list
-some of these <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
->.</A
-></H3
-><P
-> For a comprehensive discussion of the actions concept, please refer
- to the <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->actions file
- chapter</A
-> in the <A
-HREF="../user-manual/index.html"
-TARGET="_top"
->User
- Manual</A
->. It includes a <A
-HREF="../user-manual/actions-file.html#ACTIONS"
-TARGET="_top"
->list of all actions</A
->
- and an <A
-HREF="../user-manual/actions-file.html#ACT-EXAMPLES"
-TARGET="_top"
->actions
- file tutorial</A
-> to get you started.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN381"
->3.3. How are actions files configured? What is the easiest
-way to do this?</A
-></H3
-><P
-> Actions files are just text files in a special syntax and can be edited
- with a text editor. But probably the easiest way is to access
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->'s user interface with your web browser
- at <A
-HREF="http://config.privoxy.org/"
-TARGET="_top"
->http://config.privoxy.org/</A
->
- (Shortcut: <A
-HREF="http://p.p/"
-TARGET="_top"
->http://p.p/</A
->) and then select
- <SPAN
-CLASS="QUOTE"
->"<A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->View &
- change the current configuration</A
->"</SPAN
-> from the menu. Note
- that this feature must be explicitly enabled in the main config file
- (see <A
-HREF="../user-manual/config.html#ENABLE-EDIT-ACTIONS"
-TARGET="_top"
->enable-edit-actions</A
->).</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN390"
->3.4. There are several different <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> files. What are
-the differences?</A
-></H3
-><P
-> Three actions files
- are being included by the developers, to be used for
- different purposes: These are
- <TT
-CLASS="FILENAME"
->default.action</TT
->, the <SPAN
-CLASS="QUOTE"
->"main"</SPAN
-> actions file
- which is actively maintained by the <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- developers and typically sets the default policies, <TT
-CLASS="FILENAME"
->user.action</TT
->,
- where users are encouraged to make their private customizations.
- Please see <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->the actions chapter</A
->
- in the <A
-HREF="../user-manual/index.html"
-TARGET="_top"
->User Manual</A
-> for a more
- detailed explanation.</P
-><P
-> Earlier versions included three different versions of the
- <TT
-CLASS="FILENAME"
->default.action</TT
-> file. The new scheme allows for
- greater flexibility of local configuration, and for browser based
- selection of pre-defined <SPAN
-CLASS="QUOTE"
->"aggressiveness"</SPAN
-> levels.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="GETUPDATES"
->3.5. Where can I get updated Actions Files?</A
-></H3
-><P
-> Based on your feedback and the continuing development, updates of
- <TT
-CLASS="FILENAME"
->default.action</TT
-> will be
- made available from time to time on the <A
-HREF="http://sourceforge.net/project/showfiles.php?group_id=11118"
-TARGET="_top"
->files section</A
-> of
- our <A
-HREF="http://sf.net/projects/ijbswa/"
-TARGET="_top"
->project page</A
->.
- </P
-><P
-> If you wish to receive an email notification whenever we release updates of
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> or the actions file, <A
-HREF="http://lists.sourceforge.net/lists/listinfo/ijbswa-announce/"
-TARGET="_top"
->subscribe
- to our announce mailing list</A
->, ijbswa-announce@lists.sourceforge.net.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="NEWCONFIG"
->3.6. Can I use my old config files?</A
-></H3
-><P
-> The syntax and purpose of configuration files has remained roughly the
- same throughout the 3.x series, but backwards compatibility is not guaranteed.
- Also each release contains updated, <SPAN
-CLASS="QUOTE"
->"improved"</SPAN
-> versions and it is
- therefore strongly recommended to install the newer configuration files
- and merge back your modifications.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="DIFFICULT"
->3.7. Why is the configuration so complicated?</A
-></H3
-><P
-> <SPAN
-CLASS="QUOTE"
->"Complicated"</SPAN
-> is in the eye of the beholder. Those that are
- familiar with some of the underlying concepts, such as regular expression
- syntax, take to it like a fish takes to water. Also, software that tries
- hard to be <SPAN
-CLASS="QUOTE"
->"user friendly"</SPAN
->, often lacks sophistication and
- flexibility. There is always that trade-off there between power vs.
- easy-of-use. Furthermore, anyone is welcome to contribute ideas and
- implementations to enhance <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="YAHOO"
->3.8. How can I make my Yahoo/Hotmail/Gmail account work?</A
-></H3
-><P
-> The default configuration shouldn't impact the usability of any of these services.
- It may, however, make all <A
-HREF="http://en.wikipedia.org/wiki/Browser_cookie"
-TARGET="_top"
->cookies</A
->
- temporary, so that your browser will forget your
- login credentials in between browser sessions. If you would like not to have to log
- in manually each time you access those websites, simply turn off all cookie handling
- for them in the <TT
-CLASS="FILENAME"
->user.action</TT
-> file. An example for yahoo might
- look like:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-># Allow all cookies for Yahoo login:
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+"http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<head>
+ <title>Configuration</title>
+ <meta name="GENERATOR" content="Modular DocBook HTML Stylesheet Version 1.79">
+ <link rel="HOME" title="Privoxy Frequently Asked Questions" href="index.html">
+ <link rel="PREVIOUS" title="Installation" href="installation.html">
+ <link rel="NEXT" title="Miscellaneous" href="misc.html">
+ <link rel="STYLESHEET" type="text/css" href="../p_doc.css">
+ <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+</head>
+<body class="SECT1" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink="#840084" alink="#0000FF">
+ <div class="NAVHEADER">
+ <table summary="Header navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
+ <tr>
+ <th colspan="3" align="center">Privoxy Frequently Asked Questions</th>
+ </tr>
+ <tr>
+ <td width="10%" align="left" valign="bottom"><a href="installation.html" accesskey="P">Prev</a></td>
+ <td width="80%" align="center" valign="bottom"></td>
+ <td width="10%" align="right" valign="bottom"><a href="misc.html" accesskey="N">Next</a></td>
+ </tr>
+ </table>
+ <hr align="left" width="100%">
+ </div>
+ <div class="SECT1">
+ <h1 class="SECT1"><a name="CONFIGURATION" id="CONFIGURATION">3. Configuration</a></h1>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="ACTIONSFILE" id="ACTIONSFILE">3.1. What exactly is an <span class=
+ "QUOTE">"actions"</span> file?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> utilizes the concept of <span class="QUOTE">" <a href=
+ "../user-manual/actions-file.html#ACTIONS" target="_top">actions</a>"</span> that are used to manipulate and
+ control web page data. <a href="../user-manual/actions-file.html" target="_top">Actions files</a> are where these
+ <a href="../user-manual/actions-file.html#ACTIONS" target="_top">actions</a> that <span class=
+ "APPLICATION">Privoxy</span> could take while processing a certain request, are configured. Typically, you would
+ define a set of default actions that apply globally to all URLs, then add exceptions to these defaults where
+ needed. There is a wide array of actions available that give the user a high degree of control and flexibility on
+ how to process each and every web page.</p>
+ <p>Actions can be defined on a <a href="../user-manual/actions-file.html#AF-PATTERNS" target="_top">URL
+ pattern</a> basis, i.e. for single URLs, whole web sites, groups or parts thereof etc. Actions can also be
+ grouped together and then applied to requests matching one or more patterns. There are many possible actions that
+ might apply to any given site. As an example, if you are blocking <a href=
+ "http://en.wikipedia.org/wiki/Browser_cookie" target="_top">cookies</a> as one of your default actions, but need
+ to accept cookies from a given site, you would need to define an exception for this site in one of your actions
+ files, preferably in <tt class="FILENAME">user.action</tt>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="ACTIONSS" id="ACTIONSS">3.2. The <span class="QUOTE">"actions"</span> concept confuses
+ me. Please list some of these <span class="QUOTE">"actions"</span>.</a></h3>
+ <p>For a comprehensive discussion of the actions concept, please refer to the <a href=
+ "../user-manual/actions-file.html" target="_top">actions file chapter</a> in the <a href=
+ "../user-manual/index.html" target="_top">User Manual</a>. It includes a <a href=
+ "../user-manual/actions-file.html#ACTIONS" target="_top">list of all actions</a> and an <a href=
+ "../user-manual/actions-file.html#ACT-EXAMPLES" target="_top">actions file tutorial</a> to get you started.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="ACTCONFIG" id="ACTCONFIG">3.3. How are actions files configured? What is the easiest
+ way to do this?</a></h3>
+ <p>Actions files are just text files in a special syntax and can be edited with a text editor. But probably the
+ easiest way is to access <span class="APPLICATION">Privoxy</span>'s user interface with your web browser at
+ <a href="http://config.privoxy.org/" target="_top">http://config.privoxy.org/</a> (Shortcut: <a href=
+ "http://p.p/" target="_top">http://p.p/</a>) and then select <span class="QUOTE">"<a href=
+ "http://config.privoxy.org/show-status" target="_top">View & change the current configuration</a>"</span>
+ from the menu. Note that this feature must be explicitly enabled in the main config file (see <a href=
+ "../user-manual/config.html#ENABLE-EDIT-ACTIONS" target="_top">enable-edit-actions</a>).</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="AEN417" id="AEN417">3.4. There are several different <span class=
+ "QUOTE">"actions"</span> files. What are the differences?</a></h3>
+ <p>Please have a look at the <a href="../user-manual/actions-file.html" target="_top">the actions chapter</a> in
+ the <a href="../user-manual/index.html" target="_top">User Manual</a> for a detailed explanation.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="GETUPDATES" id="GETUPDATES">3.5. Where can I get updated Actions Files?</a></h3>
+ <p>Based on your feedback and the continuing development, updates of <tt class="FILENAME">default.action</tt>
+ will be made available from time to time on the <a href=
+ "https://sourceforge.net/project/showfiles.php?group_id=11118" target="_top">files section</a> of our <a href=
+ "https://sourceforge.net/projects/ijbswa/" target="_top">project page</a>.</p>
+ <p>If you wish to receive an email notification whenever we release updates of <span class=
+ "APPLICATION">Privoxy</span> or the actions file, <a href=
+ "https://lists.privoxy.org/mailman/listinfo/privoxy-announce" target="_top">subscribe to our announce mailing
+ list</a>, privoxy-announce@lists.privoxy.org.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="NEWCONFIG" id="NEWCONFIG">3.6. Can I use my old config files?</a></h3>
+ <p>The syntax and purpose of configuration files has remained roughly the same throughout the 3.x series, but
+ backwards compatibility is not guaranteed. Also each release contains updated, <span class=
+ "QUOTE">"improved"</span> versions and it is therefore strongly recommended to install the newer configuration
+ files and merge back your modifications.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DIFFICULT" id="DIFFICULT">3.7. Why is the configuration so complicated?</a></h3>
+ <p><span class="QUOTE">"Complicated"</span> is in the eye of the beholder.</p>
+ <p>Privoxy is currently mainly written by and for people who are already familiar with the underlying concepts
+ like regular expressions, HTTP and HTML, or are willing to become familiar with them to be able to get the most
+ out of a powerful and flexible tool such as Privoxy.</p>
+ <p>While everybody is expected to be able to get a Privoxy default installation up and running, fine-tuning
+ requires a certain amount of background information and Privoxy's documentation mainly concentrates on the
+ Privoxy-specific parts while only providing references to the rest.</p>
+ <p>If you or anyone you know has the skills, time and energy to reduce the barrier of entry, please <a href=
+ "general.html#PARTICIPATE">get involved</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="YAHOO" id="YAHOO">3.8. How can I make my Yahoo/Hotmail/Gmail account work?</a></h3>
+ <p>The default configuration shouldn't impact the usability of any of these services. It may, however, make all
+ <a href="http://en.wikipedia.org/wiki/Browser_cookie" target="_top">cookies</a> temporary, so that your browser
+ will forget your login credentials in between browser sessions. If you would like not to have to log in manually
+ each time you access those websites, simply turn off all cookie handling for them in the <tt class=
+ "FILENAME">user.action</tt> file. An example for yahoo might look like:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"># Allow all cookies for Yahoo login:
#
-{ -<A
-HREF="../user-manual/actions-file.html#CRUNCH-INCOMING-COOKIES"
-TARGET="_top"
->crunch-incoming-cookies</A
-> -<A
-HREF="../user-manual/actions-file.html#CRUNCH-OUTGOING-COOKIES"
-TARGET="_top"
->crunch-outgoing-cookies</A
-> -<A
-HREF="../user-manual/actions-file.html#SESSION-COOKIES-ONLY"
-TARGET="_top"
->session-cookies-only</A
-> }
-.login.yahoo.com</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> These kinds of sites are often quite complex and heavy with
- <A
-HREF="http://en.wikipedia.org/wiki/Javascript"
-TARGET="_top"
->Javascript</A
-> and
- thus <SPAN
-CLASS="QUOTE"
->"fragile"</SPAN
->. So if <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->still</I
-></SPAN
-> a problem,
- we have an <A
-HREF="../user-manual/actions-file.html#ALIASES"
-TARGET="_top"
->alias</A
-> just for such
- sticky situations:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-># Gmail is a _fragile_ site:
+{ -<a href="../user-manual/actions-file.html#CRUNCH-INCOMING-COOKIES" target=
+"_top">crunch-incoming-cookies</a> -<a href="../user-manual/actions-file.html#CRUNCH-OUTGOING-COOKIES" target=
+"_top">crunch-outgoing-cookies</a> -<a href="../user-manual/actions-file.html#SESSION-COOKIES-ONLY" target=
+"_top">session-cookies-only</a> }
+.login.yahoo.com</pre>
+ </td>
+ </tr>
+ </table>
+ <p>These kinds of sites are often quite complex and heavy with <a href="http://en.wikipedia.org/wiki/Javascript"
+ target="_top">Javascript</a> and thus <span class="QUOTE">"fragile"</span>. So if <span class=
+ "emphasis"><i class="EMPHASIS">still</i></span> a problem, we have an <a href=
+ "../user-manual/actions-file.html#ALIASES" target="_top">alias</a> just for such sticky situations:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"># Gmail is a _fragile_ site:
#
-{ <TT
-CLASS="LITERAL"
->fragile</TT
-> }
+{ <tt class="LITERAL">fragile</tt> }
# Gmail is ...
- mail.google.com</PRE
-></TD
-></TR
-></TABLE
->
- </P
-><P
-> Be sure to flush your browser's caches whenever making these kinds of
- changes, just to make sure the changes <SPAN
-CLASS="QUOTE"
->"take"</SPAN
->.
- </P
-><P
-> Make sure the domain, host and path are appropriate as well. Your browser can
- tell you where you are specifically and you should use that information for
- your configuration settings. Note that above it is not referenced as
- <TT
-CLASS="LITERAL"
->gmail.com</TT
->, which is a valid domain name.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="CONFIGFILES"
->3.9. What's the difference between the
-<SPAN
-CLASS="QUOTE"
->"Cautious"</SPAN
->, <SPAN
-CLASS="QUOTE"
->"Medium"</SPAN
-> and <SPAN
-CLASS="QUOTE"
->"Advanced"</SPAN
-> defaults?</A
-></H3
-><P
-> Configuring <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is not entirely trivial. To
- help you get started, we provide you with three different default action
- <SPAN
-CLASS="QUOTE"
->"profiles"</SPAN
-> in the web based actions file editor at <A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->http://config.privoxy.org/show-status</A
->.
- See the <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
-><I
-CLASS="CITETITLE"
->User
- Manual</I
-></A
-> for a list of actions, and how the default
- profiles are set.
- </P
-><P
-> Where the defaults are likely to break some sites, exceptions for
- known popular <SPAN
-CLASS="QUOTE"
->"problem"</SPAN
-> sites are included, but in
- general, the more aggressive your default settings are, the more exceptions
- you will have to make later. New users are best to start off in
- <SPAN
-CLASS="QUOTE"
->"Cautious"</SPAN
-> setting. This is safest and will have the fewest
- problems. See the <A
-HREF="../user-manual/index.html"
-TARGET="_top"
-><I
-CLASS="CITETITLE"
->User Manual</I
-></A
->
- for a more detailed discussion.</P
-><P
-> It should be noted that the <SPAN
-CLASS="QUOTE"
->"Advanced"</SPAN
-> profile (formerly known
- as the <SPAN
-CLASS="QUOTE"
->"Adventuresome"</SPAN
-> profile) is more
- aggressive, and will make use of some of
- <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> advanced features. Use at your own risk!</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="BROWSECONFIG"
->3.10. Why can I change the configuration
-with a browser? Does that not raise security issues?</A
-></H3
-><P
-> It may seem strange that regular users can edit the config files with their
- browsers, although the whole <TT
-CLASS="FILENAME"
->/etc/privoxy</TT
-> hierarchy
- belongs to the user <SPAN
-CLASS="QUOTE"
->"privoxy"</SPAN
->, with only 644 permissions.
- </P
-><P
-> When you use the browser-based editor, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- itself is writing to the config files. Because
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is running as the user <SPAN
-CLASS="QUOTE"
->"privoxy"</SPAN
->,
- it can update its own config files.
- </P
-><P
-> If you run <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> for multiple untrusted users (e.g. in
- a LAN) or aren't entirely in control of your own browser, you will probably want
- to make sure that the the web-based editor and remote toggle features are
- <SPAN
-CLASS="QUOTE"
->"off"</SPAN
-> by setting <SPAN
-CLASS="QUOTE"
->"<TT
-CLASS="LITERAL"
-><A
-HREF="../user-manual/config.html#ENABLE-EDIT-ACTIONS"
-TARGET="_top"
->enable-edit-actions</A
->
- 0</TT
->"</SPAN
-> and <SPAN
-CLASS="QUOTE"
->"<TT
-CLASS="LITERAL"
-><A
-HREF="../user-manual/config.html#ENABLE-REMOTE-TOGGLE"
-TARGET="_top"
->enable-remote-toggle</A
->
- 0</TT
->"</SPAN
-> in the <A
-HREF="../user-manual/config.html"
-TARGET="_top"
->main configuration file</A
->.
- </P
-><P
-> As of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> 3.0.7 these options are disabled by default.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN485"
->3.11. What is the <TT
-CLASS="FILENAME"
->default.filter</TT
-> file? What is a <SPAN
-CLASS="QUOTE"
->"filter"</SPAN
->?</A
-></H3
-><P
-> The <A
-HREF="../user-manual/filter-file.html"
-TARGET="_top"
-><TT
-CLASS="FILENAME"
->default.filter</TT
-></A
->
- file is where <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->filters</I
-></SPAN
-> as supplied by the developers are defined.
- Filters are a special subset of actions that can be used to modify or
- remove web page content or headers on the fly. Content filters can
- be applied to <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->anything</I
-></SPAN
-> in the page source,
- header filters can be applied to either server or client headers.
- Regular expressions are used to accomplish this.</P
-><P
-> There are a number of pre-defined filters to deal with common annoyances. The
- filters are only defined here, to invoke them, you need to use the
- <A
-HREF="../user-manual/actions-file.html#FILTER"
-TARGET="_top"
-><TT
-CLASS="LITERAL"
->filter</TT
->
- action</A
-> in one of the actions files. Content filtering is automatically
- disabled for inappropriate MIME types, but if you now better than Privoxy
- what should or should not be filtered you can filter any content you like.</P
-><P
-> Filters should
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->not</I
-></SPAN
-> be confused with <A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
-><TT
-CLASS="LITERAL"
->blocks</TT
-></A
->, which
- is a completely different action, and is more typically used to block ads and
- unwanted sites.</P
-><P
-> If you are familiar with regular expressions, and HTML, you can look at
- the provided <TT
-CLASS="FILENAME"
->default.filter</TT
-> with a text editor and define
- your own filters. This is potentially a very powerful feature, but
- requires some expertise in both regular expressions and HTML/HTTP.
- You should
- place any modifications to the default filters, or any new ones you create
- in a separate file, such as <TT
-CLASS="FILENAME"
->user.filter</TT
->, so they won't
- be overwritten during upgrades.
- The ability to define multiple filter files
- in <TT
-CLASS="FILENAME"
->config</TT
-> is a new feature as of v. 3.0.5.</P
-><P
-> There is no GUI editor option for this part of the configuration,
- but you can disable/enable the various pre-defined filters of the included
- <TT
-CLASS="FILENAME"
->default.filter</TT
-> file with the <A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->web-based actions file editor</A
->.
- Note that the custom actions editor must be explicitly enabled in
- the main config file (see <A
-HREF="../user-manual/config.html#ENABLE-EDIT-ACTIONS"
-TARGET="_top"
->enable-edit-actions</A
->).</P
-><P
-> If you intend to develop your own filters, you might want to have a look at
- <A
-HREF="http://www.fabiankeil.de/sourcecode/pft/"
-TARGET="_top"
->Privoxy-Filter-Test</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="LANCONFIG"
->3.12. How can I set up Privoxy to act as a proxy for my
- LAN?</A
-></H3
-><P
-> By default, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> only responds to requests
- from <TT
-CLASS="LITERAL"
->127.0.0.1</TT
-> (localhost). To have it act as a server for
- a network, this needs to be changed in the <A
-HREF="../user-manual/config.html"
-TARGET="_top"
->main configuration file</A
->. Look for
- the <TT
-CLASS="LITERAL"
-><A
-HREF="../user-manual/config.html#LISTEN-ADDRESS"
-TARGET="_top"
->listen-address</A
-></TT
->
- option, which may be commented out with a <SPAN
-CLASS="QUOTE"
->"#"</SPAN
-> symbol. Make sure
- it is uncommented, and assign it the address of the LAN gateway interface,
- and port number to use. Assuming your LAN address is 192.168.1.1 and you
- wish to run <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on port 8118, this line
- should look like:</P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> listen-address 192.168.1.1:8118</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> Save the file, and restart <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->. Configure
- all browsers on the network then to use this address and port number.</P
-><P
-> Alternately, you can have <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> listen on
- all available interfaces:</P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> listen-address :8118</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> And then use <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
->
- <A
-HREF="../user-manual/config.html#PERMIT-ACCESS"
-TARGET="_top"
->permit-access</A
->
- feature to limit connections. A firewall in this situation is recommended
- as well.</P
-><P
-> The above steps should be the same for any TCP network, regardless of
- operating system.</P
-><P
-> If you run <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on a LAN with untrusted users,
- we recommend that you double-check the <A
-HREF="../user-manual/config.html#ACCESS-CONTROL"
-TARGET="_top"
->access control and security</A
->
- options!</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN536"
->3.13. Instead of ads, now I get a checkerboard pattern. I don't want to see anything.</A
-></H3
-><P
-> The replacement for blocked images can be controlled with the <A
-HREF="../user-manual/actions-file.html#SET-IMAGE-BLOCKER"
-TARGET="_top"
-><TT
-CLASS="LITERAL"
->set-image-blocker</TT
->
- action</A
->. You have the choice of a checkerboard pattern, a transparent 1x1 GIF
- image (aka <SPAN
-CLASS="QUOTE"
->"blank"</SPAN
->), or a redirect to a custom image of your choice.
- Note that this choice only has effect for images which are blocked as images, i.e.
- whose URLs match both a <TT
-CLASS="LITERAL"
-><A
-HREF="../user-manual/actions-file.html#HANDLE-AS-IMAGE"
-TARGET="_top"
->handle-as-image</A
-></TT
->
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->and</I
-></SPAN
-> <TT
-CLASS="LITERAL"
-><A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
->block</A
-></TT
-> action.</P
-><P
-> If you want to see nothing, then change the <A
-HREF="../user-manual/actions-file.html#SET-IMAGE-BLOCKER"
-TARGET="_top"
-><TT
-CLASS="LITERAL"
->set-image-blocker</TT
->
- action</A
-> to <SPAN
-CLASS="QUOTE"
->"blank"</SPAN
->. This can be done by editing the
- <TT
-CLASS="FILENAME"
->user.action</TT
-> file, or through the <A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->web-based actions file editor</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN553"
->3.14. Why would anybody want to see a checkerboard pattern?</A
-></H3
-><P
-> Remember that <A
-HREF="general.html#WHATSANAD"
->telling which image is an ad and which
- isn't</A
->, is an educated guess. While we hope that the standard configuration
- is rather smart, it will make occasional mistakes. The checkerboard image is visually
- decent, and it shows you where images have been blocked, which can be very
- helpful in case some navigation aid or otherwise innocent image was
- erroneously blocked. It is recommended for new users so they can
- <SPAN
-CLASS="QUOTE"
->"see"</SPAN
-> what is happening. Some people might also enjoy seeing how
- many banners they <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->don't</I
-></SPAN
-> have to see.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN559"
->3.15. I see some images being replaced with text
-instead of the checkerboard image. Why and how do I get rid of this?</A
-></H3
-><P
-> This happens when the banners are not embedded in the HTML code of the
- page itself, but in separate HTML (sub)documents that are loaded into (i)frames
- or (i)layers, and these external HTML documents are blocked. Being non-images
- they get replaced by a substitute HTML page rather than a substitute image,
- which wouldn't work out technically, since the browser expects and accepts
- only HTML when it has requested an HTML document. </P
-><P
-> The substitute page adapts to the available space and shows itself as a
- miniature two-liner if loaded into small frames, or full-blown with a
- large red "BLOCKED" banner if space allows.</P
-><P
-> If you prefer the banners to be blocked by images, you must see to it that
- the HTML documents in which they are embedded are not blocked. Clicking
- the <SPAN
-CLASS="QUOTE"
->"See why"</SPAN
-> link offered in the substitute page will show
- you which rule blocked the page. After changing the rule and un-blocking
- the HTML documents, the browser will try to load the actual banner images
- and the usual image blocking will (hopefully!) kick in.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="SRVANY"
->3.16. Can Privoxy run as a service
-on Win2K/NT/XP?</A
-></H3
-><P
-> Yes. Version 3.0.5 introduces full <SPAN
-CLASS="APPLICATION"
->Windows</SPAN
-> service
- functionality. See <A
-HREF="../user-manual/installation.html#installation-pack-win"
-TARGET="_top"
-> the <I
-CLASS="CITETITLE"
->User Manual</I
-></A
-> for details on how to install and configure
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> as a service.</P
-><P
-> Earlier 3.x versions could run as a system service using <B
-CLASS="COMMAND"
->srvany.exe</B
->.
- See the discussion at <A
-HREF="http://sourceforge.net/tracker/?func=detail&atid=361118&aid=485617&group_id=11118"
-TARGET="_top"
->http://sourceforge.net/tracker/?func=detail&atid=361118&aid=485617&group_id=11118</A
->,
- for details, and a sample configuration.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="OTHERPROXY"
->3.17. How can I make Privoxy work with other
-proxies like Squid or Tor?</A
-></H3
-><P
-> This can be done and is often useful to combine the benefits of
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> with those of a another proxy.
- See the <A
-HREF="../user-manual/config.html#FORWARDING"
-TARGET="_top"
->forwarding chapter</A
->
- in the <A
-HREF="../user-manual/index.html"
-TARGET="_top"
->User Manual</A
-> which
- describes how to do this, and the <A
-HREF="misc.html#TOR"
-> How do I use Privoxy together with
- Tor</A
-> section below.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="PORT-80"
->3.18. Can I just set Privoxy to use port 80
-and thus avoid individual browser configuration?</A
-></H3
-><P
-> No, its more complicated than that. This only works with special kinds
- of proxies known as <SPAN
-CLASS="QUOTE"
->"intercepting"</SPAN
-> proxies (see below).</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="TRANSPARENT"
->3.19. Can Privoxy run as a <SPAN
-CLASS="QUOTE"
->"transparent"</SPAN
-> proxy?</A
-></H3
-><P
-> The whole idea of Privoxy is to modify client requests
- and server responses in all sorts of ways and therefore
- it's not a transparent proxy as described in
- <A
-HREF="http://tools.ietf.org/html/rfc2616"
-TARGET="_top"
->RFC 2616</A
->.</P
-><P
-> However, some people say <SPAN
-CLASS="QUOTE"
->"transparent proxy"</SPAN
-> when they
- mean <SPAN
-CLASS="QUOTE"
->"intercepting proxy"</SPAN
->. If you are one of them,
- please read the <A
-HREF="#intercepting"
-TARGET="_top"
->next entry</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="INTERCEPTING"
->3.20. Can Privoxy run as a <SPAN
-CLASS="QUOTE"
->"intercepting"</SPAN
-> proxy?</A
-></H3
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> can't intercept traffic itself,
- but it can handle requests that where intercepted and redirected
- with a packet filter (like <SPAN
-CLASS="APPLICATION"
->PF</SPAN
-> or
- <SPAN
-CLASS="APPLICATION"
->iptables</SPAN
->), as long as the <TT
-CLASS="LITERAL"
->Host</TT
->
- header is present.
- </P
-><P
-> As the <TT
-CLASS="LITERAL"
->Host</TT
-> header is required by HTTP/1.1 and as most
- web sites rely on it anyway, this limitation shouldn't be a problem.</P
-><P
-> Please refer to your packet filter's documentation to learn how to
- intercept and redirect traffic into <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->.
- Afterward you just have to configure <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to
- <A
-HREF="../user-manual/config.html#ACCEPT-INTERCEPTED-REQUESTS"
-TARGET="_top"
->accept
- intercepted requests</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="OUTLOOK"
->3.21. How can I configure Privoxy for use with Outlook?</A
-></H3
-><P
-> Versions of <SPAN
-CLASS="APPLICATION"
->Outlook</SPAN
-> prior to Office 2007, use
- <SPAN
-CLASS="APPLICATION"
->Internet Explorer</SPAN
-> components to both render HTML,
- and fetch any HTTP requests that may be embedded in an HTML email. So however
- you have <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> configured to work with IE, this
- configuration should automatically be shared, at least with older version of
- Internet Explorer.</P
-><P
-> Starting with Office 2007, Microsoft is instead using the MS-Word rendering
- engine with Outlook. It is unknown whether this can be configured to use a
- proxy.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="OUTLOOK-MORE"
->3.22. How can I have separate rules just for HTML mail?</A
-></H3
-><P
-> The short answer is, you can't. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> has no way
- of knowing which particular application makes a request, so there is no way to
- distinguish between web pages and HTML mail.
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> just blindly proxies all requests. In the
- case of <SPAN
-CLASS="APPLICATION"
->Outlook Express</SPAN
-> (see above), OE uses
- IE anyway, and there is no way for <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to ever
- be able to distinguish between them (nor could any other proxy type application for
- that matter).</P
-><P
-> For a good discussion of some of the issues involved (including privacy and
- security issues), see
- <A
-HREF="http://sourceforge.net/tracker/?func=detail&atid=211118&aid=629518&group_id=11118"
-TARGET="_top"
->http://sourceforge.net/tracker/?func=detail&atid=211118&aid=629518&group_id=11118</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="SNEAKY-COOKIES"
->3.23. I sometimes notice cookies sneaking through. How?</A
-></H3
-><P
-> <A
-HREF="http://en.wikipedia.org/wiki/Browser_cookie"
-TARGET="_top"
->Cookies</A
-> can be
- set in several ways. The classic method is via the
- <TT
-CLASS="LITERAL"
->Set-Cookie</TT
-> HTTP header. This is straightforward, and an
- easy one to manipulate, such as the <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> concept of
- <A
-HREF="../user-manual/actions-file.html#SESSION-COOKIES-ONLY"
-TARGET="_top"
->session-cookies-only</A
->.
- There is also the possibility of using
- <A
-HREF="http://en.wikipedia.org/wiki/Javascript"
-TARGET="_top"
->Javascript</A
-> to
- set cookies (<SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> calls these <TT
-CLASS="LITERAL"
->content-cookies</TT
->). This
- is trickier because the syntax can vary widely, and thus requires a certain
- amount of guesswork. It is not realistic to catch all of these short of
- disabling Javascript, which would break many sites. And lastly, if the
- cookies are embedded in a HTTPS/SSL secure session via Javascript, they are beyond
- <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> reach.</P
-><P
-> All in all, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> can help manage cookies in general, can help minimize
- the loss of privacy posed by cookies, but can't realistically stop all
- cookies.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="EVIL-COOKIES"
->3.24. Are all cookies bad? Why?</A
-></H3
-><P
-> No, in fact there are many beneficial uses of
- <A
-HREF="http://en.wikipedia.org/wiki/Browser_cookie"
-TARGET="_top"
->cookies</A
->. Cookies are just a
- method that browsers can use to store data between pages, or between browser
- sessions. Sometimes there is a good reason for this, and the user's life is a
- bit easier as a result. But there is a long history of some websites taking
- advantage of this layer of trust, and using the data they glean from you and
- your browsing habits for their own purposes, and maybe to your potential
- detriment. Such sites are using you and storing their data on your system.
- That is why the privacy conscious watch from whom those cookies come, and why
- they really <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->need</I
-></SPAN
-> to be there.</P
-><P
-> See the
- <A
-HREF="http://en.wikipedia.org/wiki/Browser_cookie"
-TARGET="_top"
->Wikipedia cookie
- definition</A
-> for more.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="ALLOW-COOKIES"
->3.25. How can I allow permanent cookies for my trusted sites?</A
-></H3
-><P
-> There are several actions that relate to cookies. The default behavior is to
- allow only <SPAN
-CLASS="QUOTE"
->"session cookies"</SPAN
->, which means the cookies only last
- for the current browser session. This eliminates most kinds of abuse related
- to cookies. But there may be cases where you want cookies to last.</P
-><P
-> To disable all cookie actions, so that cookies are allowed unrestricted,
- both in and out, for <TT
-CLASS="LITERAL"
->example.com</TT
->: </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> { -crunch-incoming-cookies -crunch-outgoing-cookies -session-cookies-only -filter{content-cookies} }
- .example.com</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> Place the above in <TT
-CLASS="FILENAME"
->user.action</TT
->. Note that some of these may
- be off by default anyway, so this might be redundant, but there is no harm
- being explicit in what you want to happen. <TT
-CLASS="FILENAME"
->user.action</TT
->
- includes an alias for this situation, called
- <TT
-CLASS="LITERAL"
->allow-all-cookies</TT
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="MULTIPLES"
->3.26. Can I have separate configurations for different users?</A
-></H3
-><P
-> Each instance of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> has its own
- configuration, including such attributes as the TCP port that it listens on.
- What you can do is run multiple instances of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->, each with
- a unique
- <A
-HREF="../user-manual/config.html#LISTEN-ADDRESS"
-TARGET="_top"
->listen-address</A
->
- configuration setting, and configuration path, and then
- each of these can have their own configurations. Think of it as per-port
- configuration.</P
-><P
->
- Simple enough for a few users, but for large installations, consider having
- groups of users that might share like configurations.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="WHITELISTS"
->3.27. Can I set-up Privoxy as a whitelist of
-<SPAN
-CLASS="QUOTE"
->"good"</SPAN
-> sites?</A
-></H3
-><P
-> Sure. There are a couple of things you can do for simple white-listing.
- Here's one real easy one:</P
-><TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> ############################################################
+ mail.google.com</pre>
+ </td>
+ </tr>
+ </table>
+ <p>Be sure to flush your browser's caches whenever making these kinds of changes, just to make sure the changes
+ <span class="QUOTE">"take"</span>.</p>
+ <p>Make sure the domain, host and path are appropriate as well. Your browser can tell you where you are
+ specifically and you should use that information for your configuration settings. Note that above it is not
+ referenced as <tt class="LITERAL">gmail.com</tt>, which is a valid domain name.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="CONFIGFILES" id="CONFIGFILES">3.9. What's the difference between the <span class=
+ "QUOTE">"Cautious"</span>, <span class="QUOTE">"Medium"</span> and <span class="QUOTE">"Advanced"</span>
+ defaults?</a></h3>
+ <p>Configuring <span class="APPLICATION">Privoxy</span> is not entirely trivial. To help you get started, we
+ provide you with three different default action <span class="QUOTE">"profiles"</span> in the web based actions
+ file editor at <a href="http://config.privoxy.org/show-status" target=
+ "_top">http://config.privoxy.org/show-status</a>. See the <a href="../user-manual/actions-file.html" target=
+ "_top"><i class="CITETITLE">User Manual</i></a> for a list of actions, and how the default profiles are set.</p>
+ <p>Where the defaults are likely to break some sites, exceptions for known popular <span class=
+ "QUOTE">"problem"</span> sites are included, but in general, the more aggressive your default settings are, the
+ more exceptions you will have to make later. New users are best to start off in <span class=
+ "QUOTE">"Cautious"</span> setting. This is safest and will have the fewest problems. See the <a href=
+ "../user-manual/index.html" target="_top"><i class="CITETITLE">User Manual</i></a> for a more detailed
+ discussion.</p>
+ <p>It should be noted that the <span class="QUOTE">"Advanced"</span> profile (formerly known as the <span class=
+ "QUOTE">"Adventuresome"</span> profile) is more aggressive, and will make use of some of <span class=
+ "APPLICATION">Privoxy's</span> advanced features. Use at your own risk!</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="BROWSECONFIG" id="BROWSECONFIG">3.10. Why can I change the configuration with a
+ browser? Does that not raise security issues?</a></h3>
+ <p>It may seem strange that regular users can edit the config files with their browsers, although the whole
+ <tt class="FILENAME">/etc/privoxy</tt> hierarchy belongs to the user <span class="QUOTE">"privoxy"</span>, with
+ only 644 permissions.</p>
+ <p>When you use the browser-based editor, <span class="APPLICATION">Privoxy</span> itself is writing to the
+ config files. Because <span class="APPLICATION">Privoxy</span> is running as the user <span class=
+ "QUOTE">"privoxy"</span>, it can update its own config files.</p>
+ <p>If you run <span class="APPLICATION">Privoxy</span> for multiple untrusted users (e.g. in a LAN) or aren't
+ entirely in control of your own browser, you will probably want to make sure that the web-based editor and remote
+ toggle features are <span class="QUOTE">"off"</span> by setting <span class="QUOTE">"<tt class="LITERAL"><a href=
+ "../user-manual/config.html#ENABLE-EDIT-ACTIONS" target="_top">enable-edit-actions</a> 0</tt>"</span> and
+ <span class="QUOTE">"<tt class="LITERAL"><a href="../user-manual/config.html#ENABLE-REMOTE-TOGGLE" target=
+ "_top">enable-remote-toggle</a> 0</tt>"</span> in the <a href="../user-manual/config.html" target="_top">main
+ configuration file</a>.</p>
+ <p>As of <span class="APPLICATION">Privoxy</span> 3.0.7 these options are disabled by default.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="FILTERFILE" id="FILTERFILE">3.11. What is the <tt class="FILENAME">default.filter</tt>
+ file? What is a <span class="QUOTE">"filter"</span>?</a></h3>
+ <p>The <a href="../user-manual/filter-file.html" target="_top"><tt class="FILENAME">default.filter</tt></a> file
+ is where <span class="emphasis"><i class="EMPHASIS">filters</i></span> as supplied by the developers are defined.
+ Filters are a special subset of actions that can be used to modify or remove web page content or headers on the
+ fly. Content filters can be applied to <span class="emphasis"><i class="EMPHASIS">anything</i></span> in the page
+ source, header filters can be applied to either server or client headers. Regular expressions are used to
+ accomplish this.</p>
+ <p>There are a number of pre-defined filters to deal with common annoyances. The filters are only defined here,
+ to invoke them, you need to use the <a href="../user-manual/actions-file.html#FILTER" target="_top"><tt class=
+ "LITERAL">filter</tt> action</a> in one of the actions files. Content filtering is automatically disabled for
+ inappropriate MIME types, but if you know better than Privoxy what should or should not be filtered you can
+ filter any content you like.</p>
+ <p>Filters should <span class="emphasis"><i class="EMPHASIS">not</i></span> be confused with <a href=
+ "../user-manual/actions-file.html#BLOCK" target="_top"><tt class="LITERAL">blocks</tt></a>, which is a completely
+ different action, and is more typically used to block ads and unwanted sites.</p>
+ <p>If you are familiar with regular expressions, and HTML, you can look at the provided <tt class=
+ "FILENAME">default.filter</tt> with a text editor and define your own filters. This is potentially a very
+ powerful feature, but requires some expertise in both regular expressions and HTML/HTTP. You should place any
+ modifications to the default filters, or any new ones you create in a separate file, such as <tt class=
+ "FILENAME">user.filter</tt>, so they won't be overwritten during upgrades. The ability to define multiple filter
+ files in <tt class="FILENAME">config</tt> is a new feature as of v. 3.0.5.</p>
+ <p>There is no GUI editor option for this part of the configuration, but you can disable/enable the various
+ pre-defined filters of the included <tt class="FILENAME">default.filter</tt> file with the <a href=
+ "http://config.privoxy.org/show-status" target="_top">web-based actions file editor</a>. Note that the custom
+ actions editor must be explicitly enabled in the main config file (see <a href=
+ "../user-manual/config.html#ENABLE-EDIT-ACTIONS" target="_top">enable-edit-actions</a>).</p>
+ <p>If you intend to develop your own filters, you might want to have a look at <a href=
+ "https://www.fabiankeil.de/sourcecode/pft/" target="_top">Privoxy-Filter-Test</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="LANCONFIG" id="LANCONFIG">3.12. How can I set up Privoxy to act as a proxy for my
+ LAN?</a></h3>
+ <p>By default, <span class="APPLICATION">Privoxy</span> only responds to requests from <tt class=
+ "LITERAL">127.0.0.1</tt> (localhost). To have it act as a server for a network, this needs to be changed in the
+ <a href="../user-manual/config.html" target="_top">main configuration file</a>. Look for the <tt class=
+ "LITERAL"><a href="../user-manual/config.html#LISTEN-ADDRESS" target="_top">listen-address</a></tt> option, which
+ may be commented out with a <span class="QUOTE">"#"</span> symbol. Make sure it is uncommented, and assign it the
+ address of the LAN gateway interface, and port number to use. Assuming your LAN address is 192.168.1.1 and you
+ wish to run <span class="APPLICATION">Privoxy</span> on port 8118, this line should look like:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"> listen-address 192.168.1.1:8118</pre>
+ </td>
+ </tr>
+ </table>
+ <p>Save the file, and restart <span class="APPLICATION">Privoxy</span>. Configure all browsers on the network
+ then to use this address and port number.</p>
+ <p>Alternately, you can have <span class="APPLICATION">Privoxy</span> listen on all available interfaces:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"> listen-address :8118</pre>
+ </td>
+ </tr>
+ </table>
+ <p>And then use <span class="APPLICATION">Privoxy's</span> <a href="../user-manual/config.html#PERMIT-ACCESS"
+ target="_top">permit-access</a> feature to limit connections. A firewall in this situation is recommended as
+ well.</p>
+ <p>The above steps should be the same for any TCP network, regardless of operating system.</p>
+ <p>If you run <span class="APPLICATION">Privoxy</span> on a LAN with untrusted users, we recommend that you
+ double-check the <a href="../user-manual/config.html#ACCESS-CONTROL" target="_top">access control and
+ security</a> options!</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="NOSEEUM" id="NOSEEUM">3.13. Instead of ads, now I get a checkerboard pattern. I don't
+ want to see anything.</a></h3>
+ <p>The replacement for blocked images can be controlled with the <a href=
+ "../user-manual/actions-file.html#SET-IMAGE-BLOCKER" target="_top"><tt class="LITERAL">set-image-blocker</tt>
+ action</a>. You have the choice of a checkerboard pattern, a transparent 1x1 GIF image (aka <span class=
+ "QUOTE">"blank"</span>), or a redirect to a custom image of your choice. Note that this choice only has effect
+ for images which are blocked as images, i.e. whose URLs match both a <tt class="LITERAL"><a href=
+ "../user-manual/actions-file.html#HANDLE-AS-IMAGE" target="_top">handle-as-image</a></tt> <span class=
+ "emphasis"><i class="EMPHASIS">and</i></span> <tt class="LITERAL"><a href=
+ "../user-manual/actions-file.html#BLOCK" target="_top">block</a></tt> action.</p>
+ <p>If you want to see nothing, then change the <a href="../user-manual/actions-file.html#SET-IMAGE-BLOCKER"
+ target="_top"><tt class="LITERAL">set-image-blocker</tt> action</a> to <span class="QUOTE">"blank"</span>. This
+ can be done by editing the <tt class="FILENAME">user.action</tt> file, or through the <a href=
+ "http://config.privoxy.org/show-status" target="_top">web-based actions file editor</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WHYSEEUM" id="WHYSEEUM">3.14. Why would anybody want to see a checkerboard
+ pattern?</a></h3>
+ <p>Remember that <a href="general.html#WHATSANAD">telling which image is an ad and which isn't</a>, is an
+ educated guess. While we hope that the standard configuration is rather smart, it will make occasional mistakes.
+ The checkerboard image is visually decent, and it shows you where images have been blocked, which can be very
+ helpful in case some navigation aid or otherwise innocent image was erroneously blocked. It is recommended for
+ new users so they can <span class="QUOTE">"see"</span> what is happening. Some people might also enjoy seeing how
+ many banners they <span class="emphasis"><i class="EMPHASIS">don't</i></span> have to see.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="BLOCKEDBYTEXT" id="BLOCKEDBYTEXT">3.15. I see some images being replaced with text
+ instead of the checkerboard image. Why and how do I get rid of this?</a></h3>
+ <p>This happens when the banners are not embedded in the HTML code of the page itself, but in separate HTML
+ (sub)documents that are loaded into (i)frames or (i)layers, and these external HTML documents are blocked. Being
+ non-images they get replaced by a substitute HTML page rather than a substitute image, which wouldn't work out
+ technically, since the browser expects and accepts only HTML when it has requested an HTML document.</p>
+ <p>The substitute page adapts to the available space and shows itself as a miniature two-liner if loaded into
+ small frames, or full-blown with a large red "BLOCKED" banner if space allows.</p>
+ <p>If you prefer the banners to be blocked by images, you must see to it that the HTML documents in which they
+ are embedded are not blocked. Clicking the <span class="QUOTE">"See why"</span> link offered in the substitute
+ page will show you which rule blocked the page. After changing the rule and un-blocking the HTML documents, the
+ browser will try to load the actual banner images and the usual image blocking will (hopefully!) kick in.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="SRVANY" id="SRVANY">3.16. Can Privoxy run as a service on Win2K/NT/XP?</a></h3>
+ <p>Yes. Version 3.0.5 introduces full <span class="APPLICATION">Windows</span> service functionality. See
+ <a href="../user-manual/installation.html#INSTALLATION-PACK-WIN" target="_top">the <i class="CITETITLE">User
+ Manual</i></a> for details on how to install and configure <span class="APPLICATION">Privoxy</span> as a
+ service.</p>
+ <p>Earlier 3.x versions could run as a system service using <b class="COMMAND">srvany.exe</b>. See the discussion
+ at <a href="https://sourceforge.net/tracker/?func=detail&atid=361118&aid=485617&group_id=11118"
+ target="_top">https://sourceforge.net/tracker/?func=detail&atid=361118&aid=485617&group_id=11118</a>,
+ for details, and a sample configuration.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="OTHERPROXY" id="OTHERPROXY">3.17. How can I make Privoxy work with other
+ proxies?</a></h3>
+ <p>This can be done and is often useful to combine the benefits of <span class="APPLICATION">Privoxy</span> with
+ those of a another proxy, for example to cache content. See the <a href="../user-manual/config.html#FORWARDING"
+ target="_top">forwarding chapter</a> in the <a href="../user-manual/index.html" target="_top">User Manual</a>
+ which describes how to do this. If you intend to use Privoxy with Tor, please also have a look at <a href=
+ "misc.html#TOR">How do I use Privoxy together with Tor</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="PORT-80" id="PORT-80">3.18. Can I just set Privoxy to use port 80 and thus avoid
+ individual browser configuration?</a></h3>
+ <p>No, its more complicated than that. This only works with special kinds of proxies known as <span class=
+ "QUOTE">"intercepting"</span> proxies (<a href="configuration.html#INTERCEPTING">see below</a>).</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="TRANSPARENT" id="TRANSPARENT">3.19. Can Privoxy run as a <span class=
+ "QUOTE">"transparent"</span> proxy?</a></h3>
+ <p>The whole idea of Privoxy is to modify client requests and server responses in all sorts of ways and therefore
+ it's not a transparent proxy as described in <a href="http://tools.ietf.org/html/rfc2616" target="_top">RFC
+ 2616</a>.</p>
+ <p>However, some people say <span class="QUOTE">"transparent proxy"</span> when they mean <span class=
+ "QUOTE">"intercepting proxy"</span>. If you are one of them, please read the <a href=
+ "configuration.html#INTERCEPTING">next entry</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="INTERCEPTING" id="INTERCEPTING">3.20. Can Privoxy run as a <span class=
+ "QUOTE">"intercepting"</span> proxy?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> can't intercept traffic itself, but it can handle requests that where
+ intercepted and redirected with a packet filter (like <span class="APPLICATION">PF</span> or <span class=
+ "APPLICATION">iptables</span>), as long as the <tt class="LITERAL">Host</tt> header is present.</p>
+ <p>As the <tt class="LITERAL">Host</tt> header is required by HTTP/1.1 and as most web sites rely on it anyway,
+ this limitation shouldn't be a problem.</p>
+ <p>Please refer to your packet filter's documentation to learn how to intercept and redirect traffic into
+ <span class="APPLICATION">Privoxy</span>. Afterward you just have to configure <span class=
+ "APPLICATION">Privoxy</span> to <a href="../user-manual/config.html#ACCEPT-INTERCEPTED-REQUESTS" target=
+ "_top">accept intercepted requests</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="OUTLOOK" id="OUTLOOK">3.21. How can I configure Privoxy for use with Outlook?</a></h3>
+ <p>Versions of <span class="APPLICATION">Outlook</span> prior to Office 2007, use <span class=
+ "APPLICATION">Internet Explorer</span> components to both render HTML, and fetch any HTTP requests that may be
+ embedded in an HTML email. So however you have <span class="APPLICATION">Privoxy</span> configured to work with
+ IE, this configuration should automatically be shared, at least with older version of Internet Explorer.</p>
+ <p>Starting with Office 2007, Microsoft is instead using the MS-Word rendering engine with Outlook. It is unknown
+ whether this can be configured to use a proxy.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="OUTLOOK-MORE" id="OUTLOOK-MORE">3.22. How can I have separate rules just for HTML
+ mail?</a></h3>
+ <p>The short answer is, you can't. <span class="APPLICATION">Privoxy</span> has no way of knowing which
+ particular application makes a request, so there is no way to distinguish between web pages and HTML mail.
+ <span class="APPLICATION">Privoxy</span> just blindly proxies all requests. In the case of <span class=
+ "APPLICATION">Outlook Express</span> (see above), OE uses IE anyway, and there is no way for <span class=
+ "APPLICATION">Privoxy</span> to ever be able to distinguish between them (nor could any other proxy type
+ application for that matter).</p>
+ <p>For a good discussion of some of the issues involved (including privacy and security issues), see <a href=
+ "https://sourceforge.net/tracker/?func=detail&atid=211118&aid=629518&group_id=11118" target=
+ "_top">https://sourceforge.net/tracker/?func=detail&atid=211118&aid=629518&group_id=11118</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="SNEAKY-COOKIES" id="SNEAKY-COOKIES">3.23. I sometimes notice cookies sneaking through.
+ How?</a></h3>
+ <p><a href="http://en.wikipedia.org/wiki/Browser_cookie" target="_top">Cookies</a> can be set in several ways.
+ The classic method is via the <tt class="LITERAL">Set-Cookie</tt> HTTP header. This is straightforward, and an
+ easy one to manipulate, such as the <span class="APPLICATION">Privoxy</span> concept of <a href=
+ "../user-manual/actions-file.html#SESSION-COOKIES-ONLY" target="_top">session-cookies-only</a>. There is also the
+ possibility of using <a href="http://en.wikipedia.org/wiki/Javascript" target="_top">Javascript</a> to set
+ cookies (<span class="APPLICATION">Privoxy</span> calls these <tt class="LITERAL">content-cookies</tt>). This is
+ trickier because the syntax can vary widely, and thus requires a certain amount of guesswork. It is not realistic
+ to catch all of these short of disabling Javascript, which would break many sites. And lastly, if the cookies are
+ embedded in a HTTPS/SSL secure session via Javascript, they are beyond <span class="APPLICATION">Privoxy's</span>
+ reach.</p>
+ <p>All in all, <span class="APPLICATION">Privoxy</span> can help manage cookies in general, can help minimize the
+ loss of privacy posed by cookies, but can't realistically stop all cookies.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="EVIL-COOKIES" id="EVIL-COOKIES">3.24. Are all cookies bad? Why?</a></h3>
+ <p>No, in fact there are many beneficial uses of <a href="http://en.wikipedia.org/wiki/Browser_cookie" target=
+ "_top">cookies</a>. Cookies are just a method that browsers can use to store data between pages, or between
+ browser sessions. Sometimes there is a good reason for this, and the user's life is a bit easier as a result. But
+ there is a long history of some websites taking advantage of this layer of trust, and using the data they glean
+ from you and your browsing habits for their own purposes, and maybe to your potential detriment. Such sites are
+ using you and storing their data on your system. That is why the privacy conscious watch from whom those cookies
+ come, and why they really <span class="emphasis"><i class="EMPHASIS">need</i></span> to be there.</p>
+ <p>See the <a href="http://en.wikipedia.org/wiki/Browser_cookie" target="_top">Wikipedia cookie definition</a>
+ for more.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="ALLOW-COOKIES" id="ALLOW-COOKIES">3.25. How can I allow permanent cookies for my
+ trusted sites?</a></h3>
+ <p>There are several actions that relate to cookies. The default behavior is to allow only <span class=
+ "QUOTE">"session cookies"</span>, which means the cookies only last for the current browser session. This
+ eliminates most kinds of abuse related to cookies. But there may be cases where you want cookies to last.</p>
+ <p>To disable all cookie actions, so that cookies are allowed unrestricted, both in and out, for <tt class=
+ "LITERAL">example.com</tt>:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class=
+ "SCREEN"> { -crunch-incoming-cookies -crunch-outgoing-cookies -session-cookies-only -filter{content-cookies} }
+ .example.com</pre>
+ </td>
+ </tr>
+ </table>
+ <p>Place the above in <tt class="FILENAME">user.action</tt>. Note that some of these may be off by default
+ anyway, so this might be redundant, but there is no harm being explicit in what you want to happen. <tt class=
+ "FILENAME">user.action</tt> includes an alias for this situation, called <tt class=
+ "LITERAL">allow-all-cookies</tt>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="MULTIPLES" id="MULTIPLES">3.26. Can I have separate configurations for different
+ users?</a></h3>
+ <p>Each instance of <span class="APPLICATION">Privoxy</span> has its own configuration, including such attributes
+ as the TCP port that it listens on. What you can do is run multiple instances of <span class=
+ "APPLICATION">Privoxy</span>, each with a unique <a href="../user-manual/config.html#LISTEN-ADDRESS" target=
+ "_top">listen-address</a> configuration setting, and configuration path, and then each of these can have their
+ own configurations. Think of it as per-port configuration.</p>
+ <p>Simple enough for a few users, but for large installations, consider having groups of users that might share
+ like configurations.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WHITELISTS" id="WHITELISTS">3.27. Can I set-up Privoxy as a whitelist of <span class=
+ "QUOTE">"good"</span> sites?</a></h3>
+ <p>Sure. There are a couple of things you can do for simple white-listing. Here's one real easy one:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"> ############################################################
# Blacklist
############################################################
- { <A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
->+block</A
-> }
+ { <a href="../user-manual/actions-file.html#BLOCK" target="_top">+block</a> }
/ # Block *all* URLs
-
+
############################################################
# Whitelist
############################################################
- { <A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
->-block</A
-> }
+ { <a href="../user-manual/actions-file.html#BLOCK" target="_top">-block</a> }
kids.example.com
toys.example.com
- games.example.com</PRE
-></TD
-></TR
-></TABLE
-><P
-> This allows access to only those three sites by first blocking all URLs, and
- then subsequently allowing three specific exceptions.</P
-><P
-> Another approach is <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
->
- <TT
-CLASS="LITERAL"
->trustfile</TT
-> concept, which incorporates the notion of
- <SPAN
-CLASS="QUOTE"
->"trusted referrers"</SPAN
->. See the <A
-HREF="../user-manual/config.html#TRUSTFILE"
-TARGET="_top"
->Trust documentation</A
->
- for details.</P
-><P
-> These are fairly simple approaches and are not completely foolproof. There
- are various other configuration options that should be disabled (described
- elsewhere here and in <A
-HREF="../user-manual/"
-TARGET="_top"
->the User Manual</A
->)
- so that users can't modify their own configuration and easily circumvent the
- whitelist.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="NO-ADBLOCK"
->3.28. How can I turn off ad-blocking?</A
-></H3
-><P
-> Ad blocking is achieved through a complex application of various <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->actions</A
->. These
- actions are deployed against simple images, banners, flash animations,
- text pages, JavaScript, pop-ups and pop-unders, etc., so its not as simple as
- just turning one or two actions off. The various actions that make up
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> ad blocking are hard-coded into the default configuration files. It
- has been assumed that everyone using <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is interested in this
- particular feature.
- </P
-><P
-> If you want to do without this, there are several approaches you can take:
- You can manually undo the many block rules in
- <TT
-CLASS="FILENAME"
->default.action</TT
->. Or even easier, just create your own
- <TT
-CLASS="FILENAME"
->default.action</TT
-> file from scratch without the many ad
- blocking rules, and corresponding exceptions. Or lastly, if you are not
- concerned about the additional blocks that are done for privacy reasons, you
- can very easily over-ride <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->all</I
-></SPAN
-> blocking with the
- following very simple rule in your <TT
-CLASS="FILENAME"
->user.action</TT
->:
- </P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> # Unblock everybody, everywhere
- { <A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
->-block</A
-> }
- / # UN-Block *all* URLs</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
->
- Or even a more comprehensive reversing of various ad related actions:</P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> # Unblock everybody, everywhere, and turn off appropriate filtering, etc
- { <A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
->-block</A
-> \
- <A
-HREF="../user-manual/actions-file.html#FILTER-BANNERS-BY-SIZE"
-TARGET="_top"
->-filter{banners-by-size}</A
-> \
- <A
-HREF="../user-manual/actions-file.html#FILTER-BANNERS-BY-LINK"
-TARGET="_top"
->-filter{banners-by-link}</A
-> \
- <TT
-CLASS="LITERAL"
->allow-popups</TT
-> \
+ games.example.com</pre>
+ </td>
+ </tr>
+ </table>
+ <p>This allows access to only those three sites by first blocking all URLs, and then subsequently allowing three
+ specific exceptions.</p>
+ <p>Another approach is <span class="APPLICATION">Privoxy's</span> <tt class="LITERAL">trustfile</tt> concept,
+ which incorporates the notion of <span class="QUOTE">"trusted referrers"</span>. See the <a href=
+ "../user-manual/config.html#TRUSTFILE" target="_top">Trust documentation</a> for details.</p>
+ <p>These are fairly simple approaches and are not completely foolproof. There are various other configuration
+ options that should be disabled (described elsewhere here and in <a href="../user-manual/" target="_top">the User
+ Manual</a>) so that users can't modify their own configuration and easily circumvent the whitelist.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="NO-ADBLOCK" id="NO-ADBLOCK">3.28. How can I turn off ad-blocking?</a></h3>
+ <p>Ad blocking is achieved through a complex application of various <span class="APPLICATION">Privoxy</span>
+ <a href="../user-manual/actions-file.html" target="_top">actions</a>. These actions are deployed against simple
+ images, banners, flash animations, text pages, JavaScript, pop-ups and pop-unders, etc., so its not as simple as
+ just turning one or two actions off. The various actions that make up <span class="APPLICATION">Privoxy</span> ad
+ blocking are hard-coded into the default configuration files. It has been assumed that everyone using
+ <span class="APPLICATION">Privoxy</span> is interested in this particular feature.</p>
+ <p>If you want to do without this, there are several approaches you can take: You can manually undo the many
+ block rules in <tt class="FILENAME">default.action</tt>. Or even easier, just create your own <tt class=
+ "FILENAME">default.action</tt> file from scratch without the many ad blocking rules, and corresponding
+ exceptions. Or lastly, if you are not concerned about the additional blocks that are done for privacy reasons,
+ you can very easily over-ride <span class="emphasis"><i class="EMPHASIS">all</i></span> blocking with the
+ following very simple rule in your <tt class="FILENAME">user.action</tt>:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"> # Unblock everybody, everywhere
+ { <a href="../user-manual/actions-file.html#BLOCK" target="_top">-block</a> }
+ / # UN-Block *all* URLs</pre>
+ </td>
+ </tr>
+ </table>
+ <p>Or even a more comprehensive reversing of various ad related actions:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"> # Unblock everybody, everywhere, and turn off appropriate filtering, etc
+ { <a href="../user-manual/actions-file.html#BLOCK" target="_top">-block</a> \
+ <a href="../user-manual/actions-file.html#FILTER-BANNERS-BY-SIZE" target="_top">-filter{banners-by-size}</a> \
+ <a href="../user-manual/actions-file.html#FILTER-BANNERS-BY-LINK" target="_top">-filter{banners-by-link}</a> \
+ <tt class="LITERAL">allow-popups</tt> \
}
- / # UN-Block *all* URLs and allow ads</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> This last <SPAN
-CLASS="QUOTE"
->"action"</SPAN
-> in this compound statement,
- <TT
-CLASS="LITERAL"
->allow-popups</TT
->, is an <A
-HREF="../user-manual/actions-file.html#ALIASES"
-TARGET="_top"
->alias</A
-> that disables
- various pop-up blocking features.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="TEMPLATES"
->3.29. How can I have custom template pages, like the
-<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->BLOCKED</I
-></SPAN
-> page?</A
-></H3
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> <SPAN
-CLASS="QUOTE"
->"templates"</SPAN
-> are specialized text files utilized by
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> for various purposes and can easily be modified using any text
- editor. All the template pages are installed in a sub-directory appropriately
- named: <TT
-CLASS="FILENAME"
->templates</TT
->. Knowing something about HTML syntax
- will of course be helpful.</P
-><P
-> Be forewarned that the default templates are subject to being overwritten
- during upgrades. You can, however, create completely new templates,
- place them in another directory and specify the alternate path in the main
- <TT
-CLASS="FILENAME"
->config</TT
->. For details, have a look at the <A
-HREF="../user-manual/config.html#templdir"
-TARGET="_top"
->templdir</A
-> option. </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="BLOCKALL"
->3.30. How can I remove the <SPAN
-CLASS="QUOTE"
->"Go There Anyway"</SPAN
-> link from
-the <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->BLOCKED</I
-></SPAN
-> page?</A
-></H3
-><P
-> There is more than one way to do it (although Perl is not involved).</P
-><P
-> Editing the BLOCKED template page (see above) may dissuade some users, but
- this method is easily circumvented. Where you need this level of control, you
- might want to build <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> from source, and disable various features that are
- available as compile-time options. You should
- <B
-CLASS="COMMAND"
->configure</B
-> the sources as follows:</P
-><P
-> <TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> ./configure --disable-toggle --disable-editor --disable-force</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> This will create an executable with hard-coded security features so that
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> does not allow easy bypassing of blocked sites, or changing the
- current configuration via any connected user's web browser.</P
-><P
-> Finally, all of these features can also be toggled on/off via options in
- <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> main <A
-HREF="../user-manual/config.html#ACCESS-CONTROL"
-TARGET="_top"
->config</A
-> file which
- means you don't have to recompile anything.</P
-></DIV
-></DIV
-><DIV
-CLASS="NAVFOOTER"
-><HR
-ALIGN="LEFT"
-WIDTH="100%"><TABLE
-SUMMARY="Footer navigation table"
-WIDTH="100%"
-BORDER="0"
-CELLPADDING="0"
-CELLSPACING="0"
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
-><A
-HREF="installation.html"
-ACCESSKEY="P"
->Prev</A
-></TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-><A
-HREF="index.html"
-ACCESSKEY="H"
->Home</A
-></TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
-><A
-HREF="misc.html"
-ACCESSKEY="N"
->Next</A
-></TD
-></TR
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
->Installation</TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-> </TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
->Miscellaneous</TD
-></TR
-></TABLE
-></DIV
-></BODY
-></HTML
->
\ No newline at end of file
+ / # UN-Block *all* URLs and allow ads</pre>
+ </td>
+ </tr>
+ </table>
+ <p>This last <span class="QUOTE">"action"</span> in this compound statement, <tt class=
+ "LITERAL">allow-popups</tt>, is an <a href="../user-manual/actions-file.html#ALIASES" target="_top">alias</a>
+ that disables various pop-up blocking features.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="TEMPLATES" id="TEMPLATES">3.29. How can I have custom template pages, like the
+ <span class="emphasis"><i class="EMPHASIS">BLOCKED</i></span> page?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> <span class="QUOTE">"templates"</span> are specialized text files
+ utilized by <span class="APPLICATION">Privoxy</span> for various purposes and can easily be modified using any
+ text editor. All the template pages are installed in a sub-directory appropriately named: <tt class=
+ "FILENAME">templates</tt>. Knowing something about HTML syntax will of course be helpful.</p>
+ <p>Be forewarned that the default templates are subject to being overwritten during upgrades. You can, however,
+ create completely new templates, place them in another directory and specify the alternate path in the main
+ <tt class="FILENAME">config</tt>. For details, have a look at the <a href="../user-manual/config.html#TEMPLDIR"
+ target="_top">templdir</a> option.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="BLOCKALL" id="BLOCKALL">3.30. How can I remove the <span class="QUOTE">"Go There
+ Anyway"</span> link from the <span class="emphasis"><i class="EMPHASIS">BLOCKED</i></span> page?</a></h3>
+ <p>There is more than one way to do it (although Perl is not involved).</p>
+ <p>Editing the BLOCKED template page (see above) may dissuade some users, but this method is easily circumvented.
+ Where you need this level of control, you might want to build <span class="APPLICATION">Privoxy</span> from
+ source, and disable various features that are available as compile-time options. You should <b class=
+ "COMMAND">configure</b> the sources as follows:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN"> ./configure --disable-toggle --disable-editor --disable-force</pre>
+ </td>
+ </tr>
+ </table>
+ <p>This will create an executable with hard-coded security features so that <span class=
+ "APPLICATION">Privoxy</span> does not allow easy bypassing of blocked sites, or changing the current
+ configuration via any connected user's web browser.</p>
+ <p>Finally, all of these features can also be toggled on/off via options in <span class=
+ "APPLICATION">Privoxy's</span> main <a href="../user-manual/config.html#ACCESS-CONTROL" target="_top">config</a>
+ file which means you don't have to recompile anything.</p>
+ </div>
+ </div>
+ <div class="NAVFOOTER">
+ <hr align="left" width="100%">
+ <table summary="Footer navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
+ <tr>
+ <td width="33%" align="left" valign="top"><a href="installation.html" accesskey="P">Prev</a></td>
+ <td width="34%" align="center" valign="top"><a href="index.html" accesskey="H">Home</a></td>
+ <td width="33%" align="right" valign="top"><a href="misc.html" accesskey="N">Next</a></td>
+ </tr>
+ <tr>
+ <td width="33%" align="left" valign="top">Installation</td>
+ <td width="34%" align="center" valign="top"> </td>
+ <td width="33%" align="right" valign="top">Miscellaneous</td>
+ </tr>
+ </table>
+ </div>
+</body>
+</html>
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