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-><DIV
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-><H1
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-><A
-NAME="CONFIGURATION"
->3. Configuration</A
-></H1
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="NEWCONFIG"
->3.1. Can I use my old config files?</A
-></H3
-><P
-> There are major changes to <SPAN
-CLASS="APPLICATION"
->Junkbuster</SPAN
->/
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> configuration from version 2.0.x to
- 2.9.x and later. Most of the older files will not work at all. This is
- especially true of <TT
-CLASS="FILENAME"
->blocklist</TT
->. If this is the case, you
- will need to re-enter your old data into the new configuration structure.
- This is probably also a good recommendation even if upgrading from 2.9.x to
- 3.x since there were many minor changes along the way.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN232"
->3.2. What is an <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> file?</A
-></H3
-><P
-> <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> files are where various actions that
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> might take, are configured.
- Typically, you would define a set of default actions that apply
- to all URLs, then add exceptions to these defaults where needed.</P
-><P
-> Actions can be defined on a per site basis, or for groups of sites. Actions
- can also be grouped together and then applied to one or more sites. There
- are many possible actions that might apply to any given site. As an example,
- if we are blocking cookies as one of our default
- <SPAN
-CLASS="APPLICATION"
->actions</SPAN
->, but need to accept cookies from a given
- site, we would define this in our <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> file. </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="ACTIONSS"
->3.3. The <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> concept confuses me. Please list
-some of these <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
->.</A
-></H3
-><P
-> These are all explained in the
- <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->user-manual</A
->.
- Please refer to that.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN247"
->3.4. How are actions files configured? What is the easiest
-way to do this?</A
-></H3
-><P
-> The easiest way to do this, is to access <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- with your web browser at <A
-HREF="http://p.p/"
-TARGET="_top"
->http://p.p/</A
->,
- and then select
- "<A
-HREF="http://config.privoxy.org"
-TARGET="_top"
->View & change the current configuration</A
->"
- from the selection list. You can also do this by editing the appropriate
- file with a text editor.</P
-><P
-> Please see the
- <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->user-manual</A
-> for a
- detailed explanation of these and other configuration files, and their
- various options and syntax.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN255"
->3.5. There are several different <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> files. What are
-the differences?</A
-></H3
-><P
-> As of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> v2.9.15, three actions files
- are being included, to be used for
- different purposes. These are
- <TT
-CLASS="FILENAME"
->default.action</TT
->, <TT
-CLASS="FILENAME"
->standard.action</TT
->,
- and <TT
-CLASS="FILENAME"
->user.action</TT
->. Please see
- <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->the User Manual</A
->
- for an explanation of each.</P
-><P
-> Earlier versions included three different versions
- <TT
-CLASS="FILENAME"
->default.action</TT
-> files. The new scheme allows for
- greater flexibility of local configuration, and for browser based
- configuration.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="BROWSECONFIG"
->3.6. Why can I change the configuration with a
-browser? Does that not raise security issues?</A
-></H3
-><P
->What I don't understand, is how I can browser edit the config file as a
-regular user, while 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 the config files.
- </P
-><P
->If you don't like this, setting <SPAN
-CLASS="QUOTE"
->"enable-edit-actions 0"</SPAN
-> in the
-config file will disable the browser-based editor. If you're that paranoid,
-you should also consider setting <SPAN
-CLASS="QUOTE"
->"enable-remote-toggle 0"</SPAN
-> to prevent
-browser-based enabling/disabling of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->.
- </P
-><P
->Note that normally only local users can connect to
-<SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->, so this is not (normally) a security
-problem.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN281"
->3.7. What is <SPAN
-CLASS="QUOTE"
->"default.filter"</SPAN
->?</A
-></H3
-><P
-> The <SPAN
-CLASS="QUOTE"
->"default.filter"</SPAN
-> file is where <SPAN
-CLASS="QUOTE"
->"filters"</SPAN
->
- are defined, which are used to <SPAN
-CLASS="QUOTE"
->"filter"</SPAN
-> any
- web page content. By <SPAN
-CLASS="QUOTE"
->"filtering"</SPAN
-> we mean it can modify, remove,
- or change <I
-CLASS="EMPHASIS"
->anything</I
-> on the page, including HTML tags, and
- JavaScript. Regular expressions are used to accomplish this, and operate
- on a line by line basis. This is potentially a very powerful feature, but
- requires some expertise. </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 see
- some of things it can be used for.</P
-><P
-> Presently, there is no GUI editor option for this part of the configuration,
- but you can disable/enable various sections of the included default
- file with the <SPAN
-CLASS="QUOTE"
->"View & change the current configuration"</SPAN
-> from
- your browser. </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN294"
->3.8. How can I set up <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to act as a proxy for my
- LAN?</A
-></H3
-><P
-> By default, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> only responds to requests
- from localhost. To have it act as a server for a network, this needs to be
- changed in the main config file where the <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- configuration is located. In that file is a <SPAN
-CLASS="QUOTE"
->"listen-address"</SPAN
->
- option. It 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:</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
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN306"
->3.9. Instead of ads, now I get a checkerboard pattern. I don't want to see anything.</A
-></H3
-><P
-> This is a configuration option for images that
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is stopping. You have the choice of a
- checkerboard pattern, a transparent 1x1 GIF image (aka <SPAN
-CLASS="QUOTE"
->"blank"</SPAN
->),
- or a custom URL of your choice. Note that to fit this category, the URL must
- match both the <A
-HREF="../user-manual/actions-file.html#HANDLE-AS-IMAGE"
-TARGET="_top"
-><SPAN
-CLASS="QUOTE"
->"+handle-as-image"</SPAN
-></A
->
- <I
-CLASS="EMPHASIS"
->and</I
->
- <A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
-><SPAN
-CLASS="QUOTE"
->"+block"</SPAN
-></A
-> actions.</P
-><P
-> If you want to see nothing, then change the
- <A
-HREF="../user-manual/actions-file.html#SET-IMAGE-BLOCKER"
-TARGET="_top"
-><SPAN
-CLASS="QUOTE"
->"+set-image-blocker"</SPAN
-></A
->
- action to <SPAN
-CLASS="QUOTE"
->"+image-blocker{blank}"</SPAN
->. This can be done from the
- <SPAN
-CLASS="QUOTE"
->"View & change the current configuration"</SPAN
-> selection at <A
-HREF="http://p.p/"
-TARGET="_top"
->http://p.p/</A
->. Or by hand editing the appropriate
- actions file. This will only effect what is defined as <SPAN
-CLASS="QUOTE"
->"images"</SPAN
->
- though. Also, some URLs that generate the bright red <SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
->
- banner, can be moved to the <SPAN
-CLASS="QUOTE"
->"+set-image-blocker"</SPAN
-> section for the
- same reason, but there are some limits and risks to this (see below).</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN325"
->3.10. Why would anybody want to see a checkerboard pattern?</A
-></H3
-><P
-> This can be helpful for troubleshooting problems. It might also be good
- for anyone new to <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> so that they can
- see if their favorite pages are displaying correctly, and
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is not inadvertently removing something
- important.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN330"
->3.11. I see large red banners on some pages that say
-<SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
->. Why and how do I get rid of this?</A
-></H3
-><P
-> These are URLs that match something in one of
- <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> block actions
- (<A
-HREF="../user-manual/actions-file.html#BLOCK"
-TARGET="_top"
-><SPAN
-CLASS="QUOTE"
->"+block"</SPAN
-></A
->).
- It is meant to be a warning so that you know something has been blocked and
- an easy way for you to see why. These are handled differently than what has
- been defined explicitly as <SPAN
-CLASS="QUOTE"
->"images"</SPAN
-> (e.g. ads that are GIF image
- files). Depending on the URL itself, it is sometimes hard for
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to really know whether there is indeed an
- ad image there or not. And there are limitations as to what
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> can do to <SPAN
-CLASS="QUOTE"
->"fool"</SPAN
-> the
- browser.</P
-><P
-> For instance, if the ad is in a frame, then it is embedded in the separate
- HTML page used for the frame. In this case, you cannot just substitute an
- aribitrary image (like we would for a <SPAN
-CLASS="QUOTE"
->"blank"</SPAN
-> image), for an HTML
- page. The browser is expecting an HTML page, and that is what it must have
- for frames. Such situations can be a little trickier to deal with, and
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> may show the <SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
-> page,
- despite your best efforts.</P
-><P
-> If you want these to be treated as if they were images, so that they can be
- made invisible, you can try moving the offending URL from the
- <SPAN
-CLASS="QUOTE"
->"+block"</SPAN
-> section to the <SPAN
-CLASS="QUOTE"
->"+imageblock"</SPAN
-> section of
- your actions file. Just be forewarned, if any URL is made
- <SPAN
-CLASS="QUOTE"
->"invisible"</SPAN
->, you may not have any inkling that something has
- been removed from that page, or why. If this approach does not work, then you are
- probably dealing with a frame (or <SPAN
-CLASS="QUOTE"
->"ilayer"</SPAN
->), and the only thing
- that can go there is an HTML page of some sort.</P
-><P
-> To deal with this situation, you could modify the
- <SPAN
-CLASS="QUOTE"
->"<TT
-CLASS="FILENAME"
->block</TT
->"</SPAN
-> HTML template that is used by
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> to display this, and make it something
- more to your liking. Currently, there is no configuration option for this.
- You will have to modify, or create your own page, and use this to replace
- <TT
-CLASS="FILENAME"
->templates/blocked</TT
->, which is what
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> uses to display the <SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
->
- page.</P
-><P
-> Another way to deal with this is find why and where
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is blocking the frame, and
- diable this. Then let the <SPAN
-CLASS="QUOTE"
->"+set-image-blocker"</SPAN
-> action
- handle the ad that is embedded in the frame's HTML page. </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="ALLISEEISRED"
->3.12. I cannot see all of the <SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
-> page banner. Help.</A
-></H3
-><P
-> There is not enough available space to fit the entire Blocked page. Try right
- clicking on the visible portion, and select <SPAN
-CLASS="QUOTE"
->"Show Frame"</SPAN
->,
- or equivalent. This will usually allow you to see the entire Privoxy
- <SPAN
-CLASS="QUOTE"
->"Blocked"</SPAN
-> page, and from there you can see just what is being
- blocked, and why.</P
-><P
-> As of Privoxy 2.9.14, the Blocked banner page is re-sizeable, and tries
- to adjust to the allotted space. There may be occassions where there
- just isn't enough room to display much of anything useful though. </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="SRVANY"
->3.13. Can <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> run as a service
-on Win2K/NT?</A
-></H3
-><P
-> Yes, it can run as a system service using <B
-CLASS="COMMAND"
->srvany.exe</B
->.
- The only catch is that this will effectively disable the
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> icon in the taskbar. You can have
- one or the other, but not both at this time :( </P
-><P
-> There is a pending feature request for this functionality. See
- thread: <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"
->3.14. How can I make <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> work with other
-proxies like <SPAN
-CLASS="APPLICATION"
->Squid</SPAN
->?</A
-></H3
-><P
-> This can be done. See the <A
-HREF="../user-manual/config.html#FORWARDING"
-TARGET="_top"
->user manual</A
->,
- which describes how to do this.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="TRANSPARENT"
->3.15. Can <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> run as a <SPAN
-CLASS="QUOTE"
->"transparent"</SPAN
-> proxy?</A
-></H3
-><P
-> No, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> currently does not have this ability,
- though it is planned for a future release. Transparent proxies require
- special handling of the request headers beyond what
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is now capable of.</P
-><P
-> Chaining <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> with another proxy that has
- this ability should work though.
- See the <A
-HREF="../user-manual/config.html#FORWARDING"
-TARGET="_top"
->user
- manual</A
->, which describes this, and also <A
-HREF="http://www.transproxy.nlc.net.au/"
-TARGET="_top"
->http://www.transproxy.nlc.net.au/</A
->.</P
-></DIV
-></DIV
-><DIV
-CLASS="NAVFOOTER"
-><HR
-ALIGN="LEFT"
-WIDTH="100%"><TABLE
-WIDTH="100%"
-BORDER="0"
-CELLPADDING="0"
-CELLSPACING="0"
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
-><A
-HREF="installation.html"
->Prev</A
-></TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-><A
-HREF="index.html"
->Home</A
-></TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
-><A
-HREF="misc.html"
->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
+<!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">3. Configuration</a>
+ </h1>
+ <div class="SECT2">
+ <h3 class="SECT2">
+ <a name="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">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">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="AEN418">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">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">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.
+ </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">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>
+ </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>
+ 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>
+ </p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+<pre class="SCREEN">
+# Gmail is a _fragile_ site:
+#
+{ <tt class="LITERAL">fragile</tt> }
+ # Gmail is ...
+ 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">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
+ 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">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">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>
+ </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>
+ <p>
+ </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">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">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">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=
+ "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">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">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">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">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=
+ "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">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>
+ </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">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">
+ ############################################################
+ # Blacklist
+ ############################################################
+ { <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> }
+ 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>
+ </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>
+ <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> \
+ }
+ / # 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">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>
+ </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%">
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