+<!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 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="CONFIGURATION"
-></A
->3. Configuration</H1
+>3. Configuration</A
+></H1
><DIV
CLASS="SECT2"
><H3
CLASS="SECT2"
><A
-NAME="AEN351"
-></A
+NAME="AEN342"
>3.1. What exactly is an <SPAN
CLASS="QUOTE"
>"actions"</SPAN
-> file?</H3
+> file?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="ACTIONSS"
-></A
>3.2. The <SPAN
CLASS="QUOTE"
>"actions"</SPAN
some of these <SPAN
CLASS="QUOTE"
>"actions"</SPAN
->.</H3
+>.</A
+></H3
><P
> For a comprehensive discussion of the actions concept, please refer
to the <A
><H3
CLASS="SECT2"
><A
-NAME="AEN374"
-></A
+NAME="AEN365"
>3.3. How are actions files configured? What is the easiest
-way to do this?</H3
+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
><H3
CLASS="SECT2"
><A
-NAME="AEN382"
-></A
+NAME="AEN373"
>3.4. There are several different <SPAN
CLASS="QUOTE"
>"actions"</SPAN
> files. What are
-the differences?</H3
+the differences?</A
+></H3
><P
> Three actions files
are being included by the developers, to be used for
CLASS="SECT2"
><A
NAME="GETUPDATES"
-></A
->3.5. Where can I get updated Actions Files?</H3
+>3.5. Where can I get updated Actions Files?</A
+></H3
><P
> Based on your feedback and the continuing development, updates of
<TT
CLASS="SECT2"
><A
NAME="NEWCONFIG"
-></A
->3.6. Can I use my old config files?</H3
+>3.6. Can I use my old config files?</A
+></H3
><P
-> The syntax and purpose of configuration files has remained the same
- throughout the 3.x series. Although each release contains updated,
- <SPAN
+> 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 recommended to use the newer
- configuration files.
-
- If upgrading from version prior to 3.0.4 the syntax for <TT
-CLASS="LITERAL"
->fast-redirects</TT
->
- has changed. See the <A
-HREF="../user-manual/whatsnew.html"
-TARGET="_top"
->What's New section</A
->
- of the <I
-CLASS="CITETITLE"
->User Manual</I
-> for details.
- </P
-><P
-> But all configuration files have substantially
- changed from the <SPAN
-CLASS="APPLICATION"
->Junkbuster</SPAN
-> days, and early
- versions of <SPAN
-CLASS="APPLICATION"
->Privoxy 2.x</SPAN
->. The old files, like
- <TT
-CLASS="FILENAME"
->blocklist</TT
-> will not work at all.
- </P
-><P
-> Refer to the <A
-HREF="../user-manual/whatsnew.html"
-TARGET="_top"
->What's New</A
->
- page for information on configuration changes that may occur from one release to another.
+> versions and it is
+ therefore strongly recommended to use the newer configuration files.
</P
></DIV
><DIV
CLASS="SECT2"
><A
NAME="DIFFICULT"
-></A
->3.7. Why is the configuration so complicated?</H3
+>3.7. Why is the configuration so complicated?</A
+></H3
><P
> <SPAN
CLASS="QUOTE"
CLASS="SECT2"
><A
NAME="YAHOO"
-></A
->3.8. How can I make my Yahoo/Hotmail/Gmail account work?</H3
+>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
CLASS="SECT2"
><A
NAME="CONFIGFILES"
-></A
>3.9. What's the difference between the
<SPAN
CLASS="QUOTE"
> and <SPAN
CLASS="QUOTE"
>"Advanced"</SPAN
-> defaults?</H3
+> defaults?</A
+></H3
><P
> Configuring <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="BROWSECONFIG"
-></A
>3.10. Why can I change the configuration
-with a browser? Does that not raise security issues?</H3
+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="QUOTE"
>"privoxy"</SPAN
>,
- it can update the config files.
+ 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), you will probably want to turn the web-based editor and remote toggle
- features off by setting <SPAN
+ a LAN), you will probably want to make sure that the turn the web-based
+ editor and remote toggle features are <SPAN
+CLASS="QUOTE"
+>"off"</SPAN
+> by setting <SPAN
CLASS="QUOTE"
>"<TT
CLASS="LITERAL"
CLASS="APPLICATION"
>Privoxy</SPAN
>,
- so this is not (normally) a security problem.
+ so this is (normally) not a security problem.
</P
></DIV
><DIV
><H3
CLASS="SECT2"
><A
-NAME="AEN488"
-></A
+NAME="AEN471"
>3.11. What is the <TT
CLASS="FILENAME"
>default.filter</TT
> file? What is a <SPAN
CLASS="QUOTE"
>"filter"</SPAN
->?</H3
+>?</A
+></H3
><P
> The <A
HREF="../user-manual/filter-file.html"
CLASS="SECT2"
><A
NAME="LANCONFIG"
-></A
>3.12. How can I set up Privoxy to act as a proxy for my
- LAN?</H3
+ LAN?</A
+></H3
><P
> By default, <SPAN
CLASS="APPLICATION"
><H3
CLASS="SECT2"
><A
-NAME="AEN531"
-></A
->3.13. Instead of ads, now I get a checkerboard pattern. I don't want to see anything.</H3
+NAME="AEN514"
+>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"
><H3
CLASS="SECT2"
><A
-NAME="AEN548"
-></A
->3.14. Why would anybody want to see a checkerboard pattern?</H3
+NAME="AEN531"
+>3.14. Why would anybody want to see a checkerboard pattern?</A
+></H3
><P
> Remember that <A
HREF="general.html#WHATSANAD"
><H3
CLASS="SECT2"
><A
-NAME="AEN554"
-></A
->3.15. I see some images being replaced by a text
-instead of the checkerboard image. Why and how do I get rid of this?</H3
+NAME="AEN537"
+>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
CLASS="SECT2"
><A
NAME="SRVANY"
-></A
>3.16. Can Privoxy run as a service
-on Win2K/NT/XP?</H3
+on Win2K/NT/XP?</A
+></H3
><P
> Yes. Version 3.0.5 introduces full <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="OTHERPROXY"
-></A
>3.17. How can I make Privoxy work with other
-proxies like Squid or Tor?</H3
+proxies like Squid or Tor?</A
+></H3
><P
> This can be done and is often useful to combine the benefits of
<SPAN
CLASS="SECT2"
><A
NAME="PORT-80"
-></A
>3.18. Can I just set Privoxy to use port 80
-and thus avoid individual browser configuration?</H3
+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"
->"transparent"</SPAN
+>"intercepting"</SPAN
> proxies (see below).</P
></DIV
><DIV
CLASS="SECT2"
><A
NAME="TRANSPARENT"
-></A
>3.19. Can Privoxy run as a <SPAN
CLASS="QUOTE"
>"transparent"</SPAN
-> proxy?</H3
+> 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
-> No, <SPAN
+> <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> currently does not have this ability,
- though it may be added in a future release. Transparent proxies require
- special handling of the request headers beyond what
- <SPAN
+> can't intercept traffic itself,
+ but it can handle requests that where intercepted and redirected
+ with a packet filter (like <SPAN
CLASS="APPLICATION"
->Privoxy</SPAN
-> is now capable of. </P
+>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 don't work if it isn't set, this limitation shouldn't be a
+ problem.</P
><P
-> Chaining <SPAN
+> Please refer to your packet filter's documentation to learn how to
+ intercept and redirect traffic into <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> behind another proxy that has
- this ability should work though.
- 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
->. As
- a transparent proxy to be used for chaining we suggest Transproxy
- (<A
-HREF="http://transproxy.sourceforge.net/"
+>. Afterward you just have
+ to configure <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> to
+ <A
+HREF="../user-manual/config.html#ACCEPT-INTERCEPTED-REQUESTS"
TARGET="_top"
->http://transproxy.sourceforge.net/</A
->).</P
+>accept intercepted requests</A
+>.</P
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="OUTLOOK"
-></A
->3.20. How can I configure Privoxy for use with Outlook
- Express?</H3
+>3.21. How can I configure Privoxy for use with Outlook
+ Express?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="OUTLOOK-MORE"
-></A
->3.21. How can I have separate rules just for HTML mail?</H3
+>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"
CLASS="SECT2"
><A
NAME="SNEAKY-COOKIES"
-></A
->3.22. I sometimes notice cookies sneaking through. How?</H3
+>3.23. I sometimes notice cookies sneaking through. How?</A
+></H3
><P
> <A
HREF="http://en.wikipedia.org/wiki/Browser_cookie"
CLASS="SECT2"
><A
NAME="EVIL-COOKIES"
-></A
->3.23. Are all cookies bad? Why?</H3
+>3.24. Are all cookies bad? Why?</A
+></H3
><P
> No, in fact there are many beneficial uses of
<A
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 security conscious watch from whom those cookies come, and why
+ That is why the privacy conscious watch from whom those cookies come, and why
they really <SPAN
CLASS="emphasis"
><I
CLASS="SECT2"
><A
NAME="ALLOW-COOKIES"
-></A
->3.24. How can I allow permanent cookies for my trusted sites?</H3
+>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
>"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 we want cookies to last.</P
+ 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
> Place the above in <TT
CLASS="FILENAME"
>user.action</TT
->. Note some of these may
+>. 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"
CLASS="SECT2"
><A
NAME="MULTIPLES"
-></A
->3.25. Can I have separate configurations for different users?</H3
+>3.26. Can I have separate configurations for different users?</A
+></H3
><P
> Each instance of <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="WHITELISTS"
-></A
->3.26. Can I set-up Privoxy as a whitelist of
+>3.27. Can I set-up Privoxy as a whitelist of
<SPAN
CLASS="QUOTE"
>"good"</SPAN
-> sites?</H3
+> 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
CLASS="SECT2"
><A
NAME="NO-ADBLOCK"
-></A
->3.27. How can I turn off ad-blocking?</H3
+>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"
CLASS="SECT2"
><A
NAME="TEMPLATES"
-></A
->3.28. How can I have custom template pages, like the
+>3.29. How can I have custom template pages, like the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>BLOCKED</I
></SPAN
-> page?</H3
+> page?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="BLOCKALL"
-></A
->3.29. How can I remove the <SPAN
+>3.30. How can I remove the <SPAN
CLASS="QUOTE"
>"Go There Anyway"</SPAN
> link from
CLASS="EMPHASIS"
>BLOCKED</I
></SPAN
-> page?</H3
+> page?</A
+></H3
+><P
+> There is more than one way to do it.</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
CLASS="APPLICATION"
>Privoxy</SPAN
> does not allow easy bypassing of blocked sites, or changing the
- current configuration via any connected user's web browser. Some of these
- features can also be toggled on/off via options in
+ current configuration via any connected user's web browser.</P
+><P
+> Note that all of these features can also be toggled on/off via options in
<SPAN
CLASS="APPLICATION"
>Privoxy's</SPAN
-> main
- <A
+> main <A
HREF="../user-manual/config.html#ACCESS-CONTROL"
TARGET="_top"
>config</A
-> file. But
- compiled-in compliance is a much better method of ensuring that a block is
- really a block. </P
-><P
-> Default builds of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> are typically built with these features
- disabled.</P
+> file which
+ means you don't have to recompile anything.</P
></DIV
></DIV
><DIV
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Contacting the developers, Bug Reporting and Feature Requests</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="CONTACT"
-></A
->6. Contacting the developers, Bug Reporting and Feature Requests</H1
+>6. Contacting the developers, Bug Reporting and Feature Requests</A
+></H1
><P
> We value your feedback. In fact, we rely on it to improve
<SPAN
CLASS="SECT2"
><A
NAME="CONTACT-SUPPORT"
-></A
->6.1. Get Support</H2
+>6.1. Get Support</A
+></H2
><P
> For casual users, our
<A
>users
mailing list</A
>, where the developers also hang around.</P
+><P
+> Note that the Privoxy mailing lists are moderated. Posts from unsubscribed
+ addresses have to be accepted manually by a moderator. This may cause a
+ delay of several days and if you use a subject that doesn't clearly
+ mention Privoxy or one of its features, your message may be accidentally
+ discarded as spam.</P
+><P
+> If you aren't subscribed, you should therefore spend a few seconds
+ to come up with a proper subject. Additionally you should make it clear
+ that you want to get CC'd. Otherwise some responses will be directed to
+ the mailing list only, and you won't see them.</P
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="REPORTING"
-></A
->6.2. Reporting Problems</H2
+>6.2. Reporting Problems</A
+></H2
><P
><SPAN
CLASS="QUOTE"
CLASS="SECT3"
><A
NAME="CONTACT-ADS"
-></A
->6.2.1. Reporting Ads or Other Configuration Problems</H3
+>6.2.1. Reporting Ads or Other Configuration Problems</A
+></H3
><P
> Please send feedback on ads that slipped through, innocent images that were
blocked, sites that don't work properly, and other configuration related problem of
CLASS="SECT3"
><A
NAME="CONTACT-BUGS"
-></A
->6.2.2. Reporting Bugs</H3
+>6.2.2. Reporting Bugs</A
+></H3
><P
-> Please report all bugs <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->only</I
-></SPAN
-> through our
- bug tracker:
+> Please report all bugs through our bug tracker:
<A
HREF="http://sourceforge.net/tracker/?group_id=11118&atid=111118"
TARGET="_top"
>. If already submitted, please feel free to add any info to the
original report that might help to solve the issue.</P
><P
->
- Please try to verify that it is a <SPAN
+> Please try to verify that it is a <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
> bug,
- and not a browser or site bug first. If unsure,
+ and not a browser or site bug or documented behaviour that just happens
+ to be different than what you expected. If unsure,
try <A
HREF="http://config.privoxy.org/toggle?set=disable"
TARGET="_top"
> <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
->, and see if the problem persists.
- If you are using your own custom configuration, please try
- the stock configs to see if the problem is configuration related.</P
+>, and see if the problem persists.</P
+><P
+> If you are using your own custom configuration, please try
+ the stock configs to see if the problem is configuration related.
+ If you're having problems with a feature that is disabled by default,
+ please ask around on the mailing list if others can reproduce the problem.</P
><P
-> If not using the latest version, the bug may have been found
+> If you aren't using the latest Privoxy version, the bug may have been found
and fixed in the meantime. We would appreciate if you could take the time
to <A
HREF="http://www.privoxy.org/user-manual/installation.html"
>upgrade
to the latest version</A
> (or even the latest CVS snapshot) and verify
- your bug.</P
+ that your bug still exists.</P
><P
>Please be sure to provide the following information:</P
><P
> The exact <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> version of the proxy software
+> version you are using
(if you got the source from CVS, please also provide the source code revisions
as shown in <A
HREF="http://config.privoxy.org/show-version"
sending the output of <SPAN
CLASS="QUOTE"
>"uname -a"</SPAN
-> should do.
+> should do,
+ in case of GNU/Linux, please also name the distribution.
</P
></LI
><LI
CLASS="APPLICATION"
>Privoxy</SPAN
> is one supplied
- by the developers of <SPAN
+ by the <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> via SourceForge,
- or somewhere else.
+> developers via SourceForge,
+ or if you got your copy somewhere else.
</P
></LI
><LI
another proxy such as <SPAN
CLASS="APPLICATION"
>Tor</SPAN
->. If so, please try
- disabling the other proxy.
+>. If so, please
+ temporary disable the other proxy to see if the symptoms change.
</P
></LI
><LI
action taken).
</P
></LI
-><LI
-><P
-> <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->Please provide your SF login, or email address</I
-></SPAN
->, in case we
- need to contact you.
- </P
-></LI
></UL
></P
><P
+> You don't have to tell us your actual name when filing a problem
+ report, but please use a nickname so we can differentiate between
+ your messages and the ones entered by other "anonymous" users that
+ may respond to your request if they have the same problem or already
+ found a solution.</P
+><P
+> Please also check the status of your request a few days after submitting
+ it, as we may request additional information. If you use a SF id,
+ you should automatically get a mail when someone responds to your request.</P
+><P
> The <A
HREF="http://www.privoxy.org/user-manual/appendix.html#ACTIONSANAT"
TARGET="_top"
CLASS="SECT2"
><A
NAME="CONTACT-FEATURE"
-></A
->6.3. Request New Features</H2
+>6.3. Request New Features</A
+></H2
><P
> You are welcome to submit ideas on new features or other proposals
for improvement through our feature request tracker at
CLASS="SECT2"
><A
NAME="CONTACT-OTHER"
-></A
->6.4. Other</H2
+>6.4. Other</A
+></H2
><P
>For any other issues, feel free to use the mailing lists. Technically interested users
and people who wish to contribute to the project are also welcome on the developers list!
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Privoxy Copyright, License and History</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="COPYRIGHT"
-></A
->7. Privoxy Copyright, License and History</H1
+>7. Privoxy Copyright, License and History</A
+></H1
><P
-> Copyright © 2001 - 2006 by Privoxy Developers <TT
+> Copyright © 2001 - 2007 by Privoxy Developers <CODE
CLASS="EMAIL"
><<A
HREF="mailto:ijbswa-developers@lists.sourceforge.net"
>ijbswa-developers@lists.sourceforge.net</A
->></TT
+>></CODE
></P
><P
> Some source code is based on code Copyright © 1997 by Anonymous Coders
><H2
CLASS="SECT2"
><A
-NAME="AEN1373"
-></A
->7.1. License</H2
+NAME="AEN1375"
+>7.1. License</A
+></H2
><P
> <SPAN
CLASS="APPLICATION"
><H2
CLASS="SECT2"
><A
-NAME="AEN1389"
-></A
->7.2. History</H2
+NAME="AEN1391"
+>7.2. History</A
+></H2
><P
> A long time ago, there was the
<A
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>General Information</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="GENERAL"
-></A
->1. General Information</H1
+>1. General Information</A
+></H1
><DIV
CLASS="SECT2"
><H3
CLASS="SECT2"
><A
-NAME="WHO_USES"
-></A
->1.1. Who should use Privoxy?</H3
+NAME="WHO-USES"
+>1.1. Who should use Privoxy?</A
+></H3
><P
> Anyone that is interested in security, privacy, or in
finer-grained control over their web and Internet experience.
CLASS="SECT2"
><A
NAME="BESTCHOICE"
-></A
>1.2. Is Privoxy the best choice for
-me?</H3
+me?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="PROXYMORON"
-></A
>1.3. What is a <SPAN
CLASS="QUOTE"
>"proxy"</SPAN
>? How does
-Privoxy work?</H3
+Privoxy work?</A
+></H3
><P
> A <A
HREF="http://en.wikipedia.org/wiki/Proxy_server"
CLASS="SECT2"
><A
NAME="OTHERSTUFF"
-></A
->1.4. Does Privoxy do anything more than ad blocking?</H3
+>1.4. Does Privoxy do anything more than ad blocking?</A
+></H3
><P
>
Yes, ad blocking is but one possible use. There are many, many ways <SPAN
CLASS="SECT2"
><A
NAME="NEWJB"
-></A
>1.5. What is this new version of
<SPAN
CLASS="QUOTE"
>"Junkbuster"</SPAN
->?</H3
+>?</A
+></H3
><P
> A long time ago, there was the
<A
CLASS="SECT2"
><A
NAME="AEN78"
-></A
>1.6. Why <SPAN
CLASS="QUOTE"
>"Privoxy"</SPAN
>? Why change the name from
-Junkbuster at all?</H3
+Junkbuster at all?</A
+></H3
><P
> Though outdated, <A
HREF="http://junkbusters.com/"
CLASS="SECT2"
><A
NAME="DIFFERS"
-></A
>1.7. How does Privoxy differ
-from the old Junkbuster?</H3
+from the old Junkbuster?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
></LI
><LI
><P
-> HTTP/1.1 compliant (but not all optional 1.1 features are supported).
- </P
-></LI
-><LI
-><P
> Support for Perl Compatible Regular Expressions in the configuration files, and
generally a more sophisticated and flexible configuration syntax over
previous versions.
CLASS="SECT2"
><A
NAME="WHATSANAD"
-></A
>1.8. How does Privoxy know what is
-an ad, and what is not?</H3
+an ad, and what is not?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
><H3
CLASS="SECT2"
><A
-NAME="AEN159"
-></A
+NAME="AEN157"
>1.9. Can Privoxy make mistakes?
-This does not sound very scientific.</H3
+This does not sound very scientific.</A
+></H3
><P
> Actually, it's a black art ;-) And yes, it is always possible to have a broad
rule accidentally block or change something by mistake. You will almost surely
><H3
CLASS="SECT2"
><A
-NAME="AEN165"
-></A
+NAME="AEN163"
>1.10. Will I have to configure Privoxy
- before I can use it?</H3
+ before I can use it?</A
+></H3
><P
> No, not really. The default installation should give you a good starting
point, and block <SPAN
CLASS="SECT2"
><A
NAME="LAN"
-></A
->1.11. Can Privoxy run as a server on a network?</H3
+>1.11. Can Privoxy run as a server on a network?</A
+></H3
><P
>
Yes, <SPAN
CLASS="SECT2"
><A
NAME="BROWSERS2"
-></A
>1.12. My browser does the same things as
-Privoxy. Why should I use Privoxy at all?</H3
+Privoxy. Why should I use Privoxy at all?</A
+></H3
><P
> Modern browsers do indeed have <SPAN
CLASS="emphasis"
CLASS="SECT2"
><A
NAME="WHYTRUST"
-></A
->1.13. Why should I trust Privoxy?</H3
+>1.13. Why should I trust Privoxy?</A
+></H3
><P
> The most important reason is because you have access to
<SPAN
check every line of every configuration file yourself. You can check every
last bit of source code should you desire. And even if you can't read code,
there should be some comfort in knowing that thousands of other people can,
- and do read it. You can build the software from scratch, if you want, so
- that you know the executable is clean, and that it is
+ and some of them do read it. You can build the software from scratch, if you want,
+ so that you know the executable is clean, and that it is
<SPAN
CLASS="emphasis"
><I
CLASS="SECT2"
><A
NAME="LICENSE"
-></A
>1.14. Is there is a license or fee? What about a
-warranty? Registration?</H3
+warranty? Registration?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
> is licensed under the <A
-HREF="http://www.gnu.org/copyleft/gpl.html"
+HREF="http://www.gnu.org/licenses/old-licenses/gpl-2.0.html"
TARGET="_top"
->GNU General Public License (GPL)</A
+>GNU General Public License (GPL) version 2</A
>.
It is free to use, copy, modify or distribute as you wish under the terms of this
license. Please see the <A
CLASS="SECT2"
><A
NAME="SPYWARE"
-></A
->1.15. Can Privoxy remove spyware? Adware? Viruses?</H3
+>1.15. Can Privoxy remove spyware? Adware? Viruses?</A
+></H3
><P
-> No. <SPAN
+> No, at least not reliable enough to trust it. <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> cannot remove anything. It is not a removal tool. It is a
- preventative. <SPAN
+> is not designed to be
+ a malware removal tool and the default configuration doesn't even try to
+ filter out any malware.</P
+><P
+> <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> can help prevent contact from sites that use such
+> could help prevent contact from (known) sites that use such
tactics with appropriate configuration rules, and thus could conceivably
prevent contamination from such sites.</P
></DIV
CLASS="SECT2"
><A
NAME="OTHERADS"
-></A
->1.16. Can I use Privoxy with other ad-blocking software?</H3
+>1.16. Can I use Privoxy with other ad-blocking software?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="JOINTEAM"
-></A
->1.17. I would like to help you, what can I do?</H3
+>1.17. I would like to help you, what can I do?</A
+></H3
><DIV
CLASS="SECT3"
><H4
CLASS="SECT3"
><A
NAME="JOINTEAM-WORK"
-></A
->1.17.1. Would you like to participate?</H4
+>1.17.1. Would you like to participate?</A
+></H4
><P
> Well, we <SPAN
CLASS="emphasis"
CLASS="SECT3"
><A
NAME="JOINTEAM-MONEY"
-></A
->1.17.2. Contribute!</H4
+>1.17.2. Contribute!</A
+></H4
><P
> We, of course, welcome donations and could use money for domain registering,
buying software to test <SPAN
CLASS="SECT3"
><A
NAME="JOINTEAM-SOFTWARE"
-></A
->1.17.3. Software</H4
+>1.17.3. Software</A
+></H4
><P
> If you are a vendor of a web-related software like a browser, web server
or proxy, and would like us to ensure that <SPAN
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Privoxy Frequently Asked Questions</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="NEXT"
TITLE="General Information"
HREF="general.html"><LINK
CLASS="TITLE"
><A
NAME="AEN2"
-></A
->Privoxy Frequently Asked Questions</H1
+>Privoxy Frequently Asked Questions</A
+></H1
><P
CLASS="PUBDATE"
> <SUB
> <A
HREF="copyright.html"
>Copyright</A
-> © 2001-2006 by
+> © 2001-2007 by
<A
-HREF="http://www.privoxy.org"
+HREF="http://www.privoxy.org/"
TARGET="_top"
>Privoxy Developers</A
>
><BR></P
><P
CLASS="PUBDATE"
->$Id: faq.sgml,v 2.23 2006/10/21 22:19:52 hal9 Exp $<BR></P
+>$Id: faq.sgml,v 2.28 2007/10/27 15:14:16 fabiankeil Exp $<BR></P
><DIV
><DIV
CLASS="ABSTRACT"
+><P
+></P
><A
NAME="AEN9"
></A
><P
-></P
-><P
> This FAQ gives quick answers to frequently asked questions about
<A
HREF="http://www.privoxy.org/"
> Privoxy is based on Internet Junkbuster (tm).</P
><P
> Please note that this document is a work in progress. This copy represents
- the state at the release of version 3.0.6.
+ the state at the release of version 3.0.7.
You can find the latest version of the document at <A
HREF="http://www.privoxy.org/faq/"
TARGET="_top"
><DL
><DT
>1.1. <A
-HREF="general.html#WHO_USES"
+HREF="general.html#WHO-USES"
>Who should use Privoxy?</A
></DT
><DT
></DT
><DT
>1.9. <A
-HREF="general.html#AEN159"
+HREF="general.html#AEN157"
>Can Privoxy make mistakes?
This does not sound very scientific.</A
></DT
><DT
>1.10. <A
-HREF="general.html#AEN165"
+HREF="general.html#AEN163"
>Will I have to configure Privoxy
before I can use it?</A
></DT
></DT
><DT
>2.4. <A
-HREF="installation.html#NEWINSTALL"
->Can I install
- Privoxy over Junkbuster?</A
-></DT
-><DT
->2.5. <A
HREF="installation.html#FIRSTSTEP"
>I just installed Privoxy. Is there anything
special I have to do now?</A
></DT
><DT
->2.6. <A
+>2.5. <A
HREF="installation.html#LOCALHOST"
>What is the proxy address of Privoxy?</A
></DT
><DT
->2.7. <A
+>2.6. <A
HREF="installation.html#NOTHING"
>I just installed Privoxy, and nothing is happening.
All the ads are there. What's wrong?</A
></DT
><DT
->2.8. <A
+>2.7. <A
HREF="installation.html#NOTUSED"
>I get a <SPAN
CLASS="QUOTE"
><DL
><DT
>3.1. <A
-HREF="configuration.html#AEN351"
+HREF="configuration.html#AEN342"
>What exactly is an <SPAN
CLASS="QUOTE"
>"actions"</SPAN
></DT
><DT
>3.3. <A
-HREF="configuration.html#AEN374"
+HREF="configuration.html#AEN365"
>How are actions files configured? What is the easiest
way to do this?</A
></DT
><DT
>3.4. <A
-HREF="configuration.html#AEN382"
+HREF="configuration.html#AEN373"
>There are several different <SPAN
CLASS="QUOTE"
>"actions"</SPAN
></DT
><DT
>3.11. <A
-HREF="configuration.html#AEN488"
+HREF="configuration.html#AEN471"
>What is the <TT
CLASS="FILENAME"
>default.filter</TT
></DT
><DT
>3.13. <A
-HREF="configuration.html#AEN531"
+HREF="configuration.html#AEN514"
>Instead of ads, now I get a checkerboard pattern. I don't want to see anything.</A
></DT
><DT
>3.14. <A
-HREF="configuration.html#AEN548"
+HREF="configuration.html#AEN531"
>Why would anybody want to see a checkerboard pattern?</A
></DT
><DT
>3.15. <A
-HREF="configuration.html#AEN554"
->I see some images being replaced by a text
+HREF="configuration.html#AEN537"
+>I see some images being replaced with text
instead of the checkerboard image. Why and how do I get rid of this?</A
></DT
><DT
></DT
><DT
>3.20. <A
+HREF="configuration.html#INTERCEPTING"
+>Can Privoxy run as a <SPAN
+CLASS="QUOTE"
+>"intercepting"</SPAN
+> proxy?</A
+></DT
+><DT
+>3.21. <A
HREF="configuration.html#OUTLOOK"
>How can I configure Privoxy for use with Outlook
Express?</A
></DT
><DT
->3.21. <A
+>3.22. <A
HREF="configuration.html#OUTLOOK-MORE"
>How can I have separate rules just for HTML mail?</A
></DT
><DT
->3.22. <A
+>3.23. <A
HREF="configuration.html#SNEAKY-COOKIES"
>I sometimes notice cookies sneaking through. How?</A
></DT
><DT
->3.23. <A
+>3.24. <A
HREF="configuration.html#EVIL-COOKIES"
>Are all cookies bad? Why?</A
></DT
><DT
->3.24. <A
+>3.25. <A
HREF="configuration.html#ALLOW-COOKIES"
>How can I allow permanent cookies for my trusted sites?</A
></DT
><DT
->3.25. <A
+>3.26. <A
HREF="configuration.html#MULTIPLES"
>Can I have separate configurations for different users?</A
></DT
><DT
->3.26. <A
+>3.27. <A
HREF="configuration.html#WHITELISTS"
>Can I set-up Privoxy as a whitelist of
<SPAN
> sites?</A
></DT
><DT
->3.27. <A
+>3.28. <A
HREF="configuration.html#NO-ADBLOCK"
>How can I turn off ad-blocking?</A
></DT
><DT
->3.28. <A
+>3.29. <A
HREF="configuration.html#TEMPLATES"
>How can I have custom template pages, like the
<SPAN
> page?</A
></DT
><DT
->3.29. <A
+>3.30. <A
HREF="configuration.html#BLOCKALL"
>How can I remove the <SPAN
CLASS="QUOTE"
><DL
><DT
>4.1. <A
-HREF="misc.html#AEN712"
+HREF="misc.html#AEN707"
>How much does Privoxy slow my browsing down? This
has to add extra time to browsing.</A
></DT
>4.2. <A
HREF="misc.html#LOADINGTIMES"
>I notice considerable
-delays in page requests compared to the old Junkbuster. What's wrong?</A
+delays in page requests. What's wrong?</A
></DT
><DT
>4.3. <A
></DT
><DT
>4.8. <A
-HREF="misc.html#AEN784"
+HREF="misc.html#AEN773"
>Can Privoxy guarantee I am anonymous?</A
></DT
><DT
>4.9. <A
-HREF="misc.html#AEN802"
+HREF="misc.html#AEN791"
>A test site says I am not using a Proxy.</A
></DT
><DT
></DT
><DT
>4.11. <A
-HREF="misc.html#AEN859"
+HREF="misc.html#AEN847"
>Might some things break because header information or
content is being altered?</A
></DT
><DT
>4.12. <A
-HREF="misc.html#AEN873"
+HREF="misc.html#AEN861"
>Can Privoxy act as a <SPAN
CLASS="QUOTE"
>"caching"</SPAN
></DT
><DT
>4.13. <A
-HREF="misc.html#AEN882"
+HREF="misc.html#AEN871"
>What about as a firewall? Can Privoxy protect me?</A
></DT
><DT
>4.14. <A
-HREF="misc.html#AEN887"
+HREF="misc.html#AEN876"
>I have large empty spaces / a checkerboard pattern now where
ads used to be. Why?</A
></DT
><DT
>4.15. <A
-HREF="misc.html#AEN895"
+HREF="misc.html#AEN884"
>How can Privoxy filter Secure (HTTPS) URLs?</A
></DT
><DT
>4.16. <A
-HREF="misc.html#AEN909"
+HREF="misc.html#AEN898"
>Privoxy runs as a <SPAN
CLASS="QUOTE"
>"server"</SPAN
>"MicroSuck"</SPAN
>! Why are you manipulating my browsing?</A
></DT
+><DT
+>4.26. <A
+HREF="misc.html#VALID"
+>Does Privoxy produce <SPAN
+CLASS="QUOTE"
+>"valid"</SPAN
+> HTML (or XHTML)?</A
+></DT
></DL
></DD
><DT
><DL
><DT
>5.1. <A
-HREF="trouble.html#AEN1062"
+HREF="trouble.html#AEN1063"
>I cannot connect to any websites. Or, I am getting
<SPAN
CLASS="QUOTE"
></DT
><DT
>5.3. <A
-HREF="trouble.html#AEN1085"
+HREF="trouble.html#AEN1086"
>I just added a new rule, but the steenkin ad is
still getting through. How?</A
></DT
><DL
><DT
>7.1. <A
-HREF="copyright.html#AEN1373"
+HREF="copyright.html#AEN1375"
>License</A
></DT
><DT
>7.2. <A
-HREF="copyright.html#AEN1389"
+HREF="copyright.html#AEN1391"
>History</A
></DT
></DL
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Installation</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="INSTALLATION"
-></A
->2. Installation</H1
+>2. Installation</A
+></H1
><DIV
CLASS="SECT2"
><H3
CLASS="SECT2"
><A
NAME="WHICHBROWSERS"
-></A
->2.1. Which browsers are supported by Privoxy?</H3
+>2.1. Which browsers are supported by Privoxy?</A
+></H3
><P
> Any browser that can be configured to use a proxy, which
should be virtually all browsers, including
CLASS="APPLICATION"
>Internet
Explorer</SPAN
->, and <SPAN
+>, <SPAN
CLASS="APPLICATION"
>Opera</SPAN
+>, and
+ <SPAN
+CLASS="APPLICATION"
+>Safari</SPAN
> among others.
Direct browser support is not an absolute requirement since
<SPAN
CLASS="SECT2"
><A
NAME="WHICHOS"
-></A
->2.2. Which operating systems are supported?</H3
+>2.2. Which operating systems are supported?</A
+></H3
><P
> At present, <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
> is known to run on
- Windows(95, 98, ME, 2000, XP), Linux (RedHat, SuSE, Debian, Fedora, Gentoo,
- Slackware and others), Mac OSX, OS/2, AmigaOS, FreeBSD, NetBSD, OpenBSD,
- Solaris, and various other flavors of Unix.</P
+ Windows(95, 98, ME, 2000, XP, Vista), GNU/Linux (RedHat, SuSE, Debian,
+ Fedora, Gentoo, Slackware and others), Mac OSX, OS/2, AmigaOS, FreeBSD,
+ NetBSD, OpenBSD, Solaris, and various other flavors of Unix.</P
><P
> But any operating system that runs TCP/IP, can conceivably take advantage of
<SPAN
CLASS="SECT2"
><A
NAME="EMAIL-CLIENT"
-></A
->2.3. Can I use Privoxy with my email client?</H3
+>2.3. Can I use Privoxy with my email client?</A
+></H3
><P
> As long as there is some way to set a HTTP proxy for the client, then yes,
any application can be used, whether it is strictly speaking a
><H3
CLASS="SECT2"
><A
-NAME="NEWINSTALL"
-></A
->2.4. Can I install
- Privoxy over Junkbuster?</H3
-><P
-> We recommend you un-install <SPAN
-CLASS="APPLICATION"
->Junkbuster</SPAN
->
- first to minimize conflicts and confusion. You may want to
- save your old configuration files for future reference. The configuration
- files and syntax have substantially changed, so you will need to manually
- port your old patterns. See the <A
-HREF="../user-manual/upgradersnote.html"
-TARGET="_top"
->note
- to upgraders</A
-> and <A
-HREF="../user-manual/installation.html"
-TARGET="_top"
->installation
- chapter</A
-> in the <A
-HREF="../user-manual/index.html"
-TARGET="_top"
->User Manual</A
->
- for details.
- </P
-><P
-> Note: Some installers may automatically un-install
- <SPAN
-CLASS="APPLICATION"
->Junkbuster</SPAN
->, if present!
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
NAME="FIRSTSTEP"
-></A
->2.5. I just installed Privoxy. Is there anything
-special I have to do now?</H3
+>2.4. I just installed Privoxy. Is there anything
+special I have to do now?</A
+></H3
><P
> All browsers must be told to use <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="LOCALHOST"
-></A
->2.6. What is the proxy address of Privoxy?</H3
+>2.5. What is the proxy address of Privoxy?</A
+></H3
><P
> If you set up the <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="NOTHING"
-></A
->2.7. I just installed Privoxy, and nothing is happening.
-All the ads are there. What's wrong?</H3
+>2.6. I just installed Privoxy, and nothing is happening.
+All the ads are there. What's wrong?</A
+></H3
><P
> Did you configure your browser to use <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="NOTUSED"
-></A
->2.8. I get a <SPAN
+>2.7. I get a <SPAN
CLASS="QUOTE"
>"Privoxy is not being used"</SPAN
> dummy page although
-Privoxy is running and being used.</H3
+Privoxy is running and being used.</A
+></H3
><P
> First, make sure that Privoxy is <SPAN
CLASS="emphasis"
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Miscellaneous</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="MISC"
-></A
->4. Miscellaneous</H1
+>4. Miscellaneous</A
+></H1
><DIV
CLASS="SECT2"
><H3
CLASS="SECT2"
><A
-NAME="AEN712"
-></A
+NAME="AEN707"
>4.1. How much does Privoxy slow my browsing down? This
-has to add extra time to browsing.</H3
+has to add extra time to browsing.</A
+></H3
><P
> How much of an impact depends on many things, including the CPU of the host
system, how aggressive the configuration is, which specific actions are being triggered,
>deanimate-gifs</A
></TT
>
- actions will certainly cause a perceived slowdown, since the entire document
+ actions may cause a perceived slowdown, since the entire document
needs to be buffered before displaying. And on very large documents, filtering may have
some measurable impact. How much depends on the page size, the actual
definition of the filter(s), etc. See below. Most other actions have little
to no impact on speed.</P
><P
->
- Also, when filtering is enabled, typically there is a disabling of
- compression, (see <A
+> Also, when filtering is enabled but zlib support isn't available, compression
+ is often disabled (see <A
HREF="../user-manual/actions-file.html#PREVENT-COMPRESSION"
TARGET="_top"
>prevent-compression</A
CLASS="SECT2"
><A
NAME="LOADINGTIMES"
-></A
>4.2. I notice considerable
-delays in page requests compared to the old Junkbuster. What's wrong?</H3
+delays in page requests. What's wrong?</A
+></H3
><P
> If you use any <TT
CLASS="LITERAL"
> only knows how
to differentiate filterable content because of the MIME type as reported by
the server, or because of some configuration setting that enables/disables
- filtering. </P
+ filtering.</P
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="CONFIGURL"
-></A
>4.3. What are "http://config.privoxy.org/" and
-"http://p.p/"?</H3
+"http://p.p/"?</A
+></H3
><P
> <A
HREF="http://config.privoxy.org/"
></SPAN
>
web site at config.privoxy.org.</P
-><P
-> With recent versions of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> (version 2.9.x and
- later), the user interface features information on the run time status, the
- configuration, and even a built-in editor for the <A
-HREF="../user-manual/actions-file.html"
-TARGET="_top"
->actions files</A
->.</P
-><P
-> Note that the built-in URLs from earlier versions of <SPAN
-CLASS="APPLICATION"
->Junkbuster</SPAN
->
- / <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->, http://example.com/show-proxy-args and http://i.j.b/,
- are no longer supported. If you still use such an old version, you should really consider
- upgrading to 3.0.6.</P
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="NEWADS"
-></A
>4.4. How can I submit new ads, or report
-problems?</H3
+problems?</A
+></H3
><P
>Please see the <A
HREF="contact.html"
CLASS="SECT2"
><A
NAME="NEWADS2"
-></A
>4.5. If I do submit missed ads, will
-they be included in future updates?</H3
+they be included in future updates?</A
+></H3
><P
> Whether such submissions are eventually included in the
<TT
CLASS="SECT2"
><A
NAME="NOONECARES"
-></A
>4.6. Why doesn't anyone answer my support
-request?</H3
+request?</A
+></H3
><P
>Rest assured that it has been read and considered. Why it is not answered,
could be for various reasons, including no one has a good answer for it, no
CLASS="SECT2"
><A
NAME="IP"
-></A
->4.7. How can I hide my IP address?</H3
+>4.7. How can I hide my IP address?</A
+></H3
><P
> If you run both the browser and <SPAN
CLASS="APPLICATION"
provide a further level of indirection between you and the web server.</P
><P
> However, these proxies are called "anonymous" because you don't need
- a password, not because they would offer any real anonymity.
+ to authenticate, not because they would offer any real anonymity.
Most of them will log your IP address and make it available to the
authorities in case you violate the law of the country they run in. In fact
you can't even rule out that some of them only exist to *collect* information
>How do I use <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> together with <SPAN
+> together
+ with <SPAN
CLASS="APPLICATION"
>Tor</SPAN
> section</A
><H3
CLASS="SECT2"
><A
-NAME="AEN784"
-></A
->4.8. Can Privoxy guarantee I am anonymous?</H3
+NAME="AEN773"
+>4.8. Can Privoxy guarantee I am anonymous?</A
+></H3
><P
> No. Your chances of remaining anonymous are greatly improved, but unless you
<A
> Most of <SPAN
CLASS="APPLICATION"
>Privoxy's</SPAN
-> protection can be easily subverted
+> privacy-enhancing features can be easily subverted
by an insecure browser configuration, therefore you should use a browser that can
be configured to only execute code from trusted sites, and be careful which sites you trust.
For example there is no point in having <SPAN
><H3
CLASS="SECT2"
><A
-NAME="AEN802"
-></A
->4.9. A test site says I am not using a Proxy.</H3
+NAME="AEN791"
+>4.9. A test site says I am not using a Proxy.</A
+></H3
><P
> Good! Actually, they are probably testing for some other kinds of proxies.
Hiding yourself completely would require additional steps.</P
CLASS="SECT2"
><A
NAME="TOR"
-></A
>4.10. How do I use Privoxy
- together with Tor?</H3
+ together with Tor?</A
+></H3
><P
> Before you configure <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> to use <SPAN
-CLASS="APPLICATION"
->Tor</SPAN
->
- (<A
-HREF="http://tor.eff.org/"
+> to use
+ <A
+HREF="https://www.torproject.org/"
TARGET="_top"
->http://tor.eff.org/</A
->),
+>Tor</A
+>,
please follow the <I
CLASS="CITETITLE"
>User Manual</I
><P
>
If it is, refer to <A
-HREF="http://tor.eff.org/documentation.html.en"
+HREF="https://www.torproject.org/documentation.html"
TARGET="_top"
>Tor's
extensive documentation</A
CLASS="APPLICATION"
>Tor</SPAN
>
- to increase your anonymity level, therefore you should use socks4a,
- to make sure <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> DNS requests are
+ to increase your anonymity level, therefore you should use socks4a, to make sure DNS requests are
done through <SPAN
CLASS="APPLICATION"
>Tor</SPAN
></TABLE
></P
><P
-> This is enough to reach the Internet, but additionally you should
+> This is enough to reach the Internet, but additionally you might want to
uncomment the following forward rules, to make sure your local network is still
reachable through Privoxy:</P
><P
><P
> Unencrypted connections to systems in these address ranges will
be as (un)secure as the local network is, but the alternative is
- that you can't reach the network at all.
- If you also want to be able to reach servers in your local
- network by using their names, you will need additional
- exceptions that look like this:</P
+ that your browser can't reach the network at all. Then again,
+ that may actually be desired and if you don't know for sure
+ that your browser has to be able to reach the local network,
+ there's no reason to allow it.</P
+><P
+> If you want your browser to be able to reach servers in your local
+ network by using their names, you will need additional exceptions
+ that look like this:</P
><P
> <TABLE
BORDER="0"
and that there are no other forward lines, unless you know that you need them. If everything looks good,
refer to
<A
-HREF="http://wiki.noreply.org/noreply/TheOnionRouter/TorFAQ#head-0e1cc2ac330ede8c6ad1ac0d0db0ac163b0e6143"
+HREF="https://wiki.torproject.org/wiki/TheOnionRouter/TorFAQ#head-0e1cc2ac330ede8c6ad1ac0d0db0ac163b0e6143"
TARGET="_top"
>Tor
Faq 4.2</A
><H3
CLASS="SECT2"
><A
-NAME="AEN859"
-></A
+NAME="AEN847"
>4.11. Might some things break because header information or
-content is being altered?</H3
+content is being altered?</A
+></H3
><P
> Definitely. It is common for sites to use browser type, browser version,
HTTP header content, and various other techniques in order to dynamically
might be very different. There are many, many ways that this can be handled,
so having hard and fast rules, is tricky.</P
><P
-> <SPAN
+> The <SPAN
CLASS="QUOTE"
>"User-Agent"</SPAN
-> is often used in this way to identify
- the browser, and adjust content accordingly. Changing this now (at least not
- further than removing the OS information) is not recommended, since so many
- sites do look for it. You may get undesirable results by changing just this
- one aspect.</P
+> is sometimes used in this way to identify
+ the browser, and adjust content accordingly.</P
><P
> Also, different browsers use different encodings of Russian and Czech
characters, certain web servers convert pages on-the-fly according to the
><H3
CLASS="SECT2"
><A
-NAME="AEN873"
-></A
+NAME="AEN861"
>4.12. Can Privoxy act as a <SPAN
CLASS="QUOTE"
>"caching"</SPAN
> proxy to
-speed up web browsing?</H3
+speed up web browsing?</A
+></H3
><P
> No, it does not have this ability at all. You want something like
<A
HREF="http://www.squid-cache.org/"
TARGET="_top"
>Squid</A
-> for this. And, yes,
- before you ask, <SPAN
+> or
+ <A
+HREF="http://www.pps.jussieu.fr/~jch/software/polipo/"
+TARGET="_top"
+>Polipo</A
+> for this.
+ And, yes, before you ask, <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
> can co-exist
><H3
CLASS="SECT2"
><A
-NAME="AEN882"
-></A
->4.13. What about as a firewall? Can Privoxy protect me?</H3
+NAME="AEN871"
+>4.13. What about as a firewall? Can Privoxy protect me?</A
+></H3
><P
-> Not in the way you mean, or in the way a true firewall can.
+> Not in the way you mean, or in the way some firewall vendors claim they can.
<SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> can help protect your privacy, but not
- protect you from intrusion attempts. It is, of course, perfectly possible
- and recommended to use <SPAN
+> can help protect your privacy, but can't
+ protect your system from intrusion attempts. It is, of course, perfectly possible
+ to use <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
><H3
CLASS="SECT2"
><A
-NAME="AEN887"
-></A
+NAME="AEN876"
>4.14. I have large empty spaces / a checkerboard pattern now where
-ads used to be. Why?</H3
+ads used to be. Why?</A
+></H3
><P
> It is technically possible to eliminate banners and ads in a way that frees
their allocated page space. This could easily be done by blocking with
><H3
CLASS="SECT2"
><A
-NAME="AEN895"
-></A
->4.15. How can Privoxy filter Secure (HTTPS) URLs?</H3
+NAME="AEN884"
+>4.15. How can Privoxy filter Secure (HTTPS) URLs?</A
+></H3
><P
> Since secure HTTP connections are encrypted SSL sessions between your browser
and the secure site, and are meant to be reliably <SPAN
><H3
CLASS="SECT2"
><A
-NAME="AEN909"
-></A
+NAME="AEN898"
>4.16. Privoxy runs as a <SPAN
CLASS="QUOTE"
>"server"</SPAN
>. How
-secure is it? Do I need to take any special precautions?</H3
+secure is it? Do I need to take any special precautions?</A
+></H3
><P
-> There are no known exploits that might affect
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->. On Unix-like systems,
- <SPAN
+> On Unix-like systems, <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
> can run as a non-privileged
- user, which is how we recommend it be run. Also, by default
+ user, which is how we recommend it be run. Also, by default
<SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> only listens to requests
- from <SPAN
+> listens to requests from <SPAN
CLASS="QUOTE"
>"localhost"</SPAN
-> only. The server aspect of
- <SPAN
+>
+ only.</P
+><P
+> The server aspect of <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> is not itself directly exposed to the
- Internet in this configuration. If you want to have
+> is not itself directly
+ exposed to the Internet in this configuration. If you want to have
<SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
CLASS="SECT2"
><A
NAME="TURNOFF"
-></A
->4.17. How can I temporarily disable Privoxy?</H3
+>4.17. How can I temporarily disable Privoxy?</A
+></H3
><P
> The easiest way is to access <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="REALLYOFF"
-></A
>4.18. When <SPAN
CLASS="QUOTE"
>"disabled"</SPAN
> is Privoxy totally
-out of the picture?</H3
+out of the picture?</A
+></H3
><P
-> No, this just means all filtering and actions are disabled.
+> No, this just means all optional filtering and actions are disabled.
<SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
CLASS="SECT2"
><A
NAME="TURNOFF2"
-></A
->4.19. How can I tell Privoxy to totally ignore certain sites?</H3
+>4.19. How can I tell Privoxy to totally ignore certain sites?</A
+></H3
><P
> Bypassing a proxy, or proxying based on arbitrary criteria, is purely a browser
configuration issue, not a <SPAN
CLASS="SECT2"
><A
NAME="CRUNCH"
-></A
>4.20. My logs show Privoxy <SPAN
CLASS="QUOTE"
>"crunches"</SPAN
ads, but also its own internal CGI pages. What is a <SPAN
CLASS="QUOTE"
>"crunch"</SPAN
->?</H3
+>?</A
+></H3
><P
> A <SPAN
CLASS="QUOTE"
CLASS="QUOTE"
>"crunch"</SPAN
>.</P
+><P
+> Since version 3.0.7, Privoxy will also log the crunch reason.
+ If you are using an older version you might want to upgrade.</P
></DIV
><DIV
CLASS="SECT2"
CLASS="SECT2"
><A
NAME="DOWNLOADS"
-></A
>4.21. Can Privoxy effect files that I download
-from a webserver? FTP server?</H3
+from a webserver? FTP server?</A
+></H3
><P
> From the webserver's perspective, there is no difference between
viewing a document (i.e. a page), and downloading a file. The same is true of
> knows the differences in files according
to the <SPAN
CLASS="QUOTE"
->"Document Type"</SPAN
+>"Content Type"</SPAN
> as reported by the webserver. If this is
reported accurately (e.g. <SPAN
CLASS="QUOTE"
> In short, filtering is <SPAN
CLASS="QUOTE"
>"ON"</SPAN
-> if a) the Document Type as reported
+> if a) the content type as reported
by the webserver is appropriate <SPAN
CLASS="emphasis"
><I
<SPAN
CLASS="QUOTE"
>"bad"</SPAN
->. It's the configuration that let's it all happen or not.</P
+>. It's the configuration that lets it all happen or not.</P
><P
> If you download text files, you probably do not want these to be filtered,
particularly if the content is source code, or other critical content. Source
CLASS="SECT2"
><A
NAME="DOWNLOADS2"
-></A
>4.22. I just downloaded a Perl script, and Privoxy
-altered it! Yikes, what is wrong!</H3
+altered it! Yikes, what is wrong!</A
+></H3
><P
> Please read above.</P
></DIV
CLASS="SECT2"
><A
NAME="HOSTSFILE"
-></A
>4.23. Should I continue to use a <SPAN
CLASS="QUOTE"
>"HOSTS"</SPAN
-> file for ad-blocking?</H3
+> file for ad-blocking?</A
+></H3
><P
> One time-tested technique to defeat common ads is to trick the local DNS
system by giving a phony IP address for the ad generator in the local
CLASS="FILENAME"
>HOSTS</TT
> file, in fact, not only
- duplicates effort, but may get in the way. It is recommended to remove
- such entries from your <TT
+ duplicates effort, but may get in the way and seriously slow down your system.
+ It is recommended to remove such entries from your <TT
CLASS="FILENAME"
>HOSTS</TT
> file. If you think
CLASS="SECT2"
><A
NAME="SEEALSO"
-></A
>4.24. Where can I find more information about Privoxy
-and related issues?</H3
+and related issues?</A
+></H3
><P
> Other references and sites of interest to <SPAN
CLASS="APPLICATION"
HREF="http://www.squid-cache.org/"
TARGET="_top"
>http://www.squid-cache.org/</A
->, a very popular
+>, a popular
caching proxy, which is often used together with <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
><TR
><TD
> <A
+HREF="http://www.pps.jussieu.fr/~jch/software/polipo/"
+TARGET="_top"
+>http://www.pps.jussieu.fr/~jch/software/polipo/</A
+>,
+ <SPAN
+CLASS="APPLICATION"
+>Polipo</SPAN
+> is a caching proxy with advanced features
+ like pipelining, multiplexing and caching of partial instances. In many setups
+ it can be used as <SPAN
+CLASS="APPLICATION"
+>Squid</SPAN
+> replacement.
+ </TD
+></TR
+></TBODY
+></TABLE
+><P
+></P
+>
+ <P
+></P
+><TABLE
+BORDER="0"
+><TBODY
+><TR
+><TD
+> <A
HREF="http://tor.eff.org/"
TARGET="_top"
>http://tor.eff.org/</A
CLASS="SECT2"
><A
NAME="MICROSUCK"
-></A
>4.25. I've noticed that Privoxy changes <SPAN
CLASS="QUOTE"
>"Microsoft"</SPAN
<SPAN
CLASS="QUOTE"
>"MicroSuck"</SPAN
->! Why are you manipulating my browsing?</H3
+>! Why are you manipulating my browsing?</A
+></H3
><P
> We're not. The text substitutions that you are seeing are disabled
in the default configuration as shipped. You have either manually
> profile in the
web-based editor. Please upgrade!</P
></DIV
+><DIV
+CLASS="SECT2"
+><H3
+CLASS="SECT2"
+><A
+NAME="VALID"
+>4.26. Does Privoxy produce <SPAN
+CLASS="QUOTE"
+>"valid"</SPAN
+> HTML (or XHTML)?</A
+></H3
+><P
+> Privoxy generates HTML in both its own <SPAN
+CLASS="QUOTE"
+>"templates"</SPAN
+>, and possibly
+ whenever there are text substitutions via a <SPAN
+CLASS="APPLICATION"
+>Privoxy</SPAN
+> filter. While this
+ should always conform to the HTML 4.01 specifications, it has not been
+ validated against this or any other standard. </P
+></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Troubleshooting</TITLE
><META
NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
-"><LINK
+CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Privoxy Frequently Asked Questions"
HREF="index.html"><LINK
CLASS="SECT1"
><A
NAME="TROUBLE"
-></A
->5. Troubleshooting</H1
+>5. Troubleshooting</A
+></H1
><DIV
CLASS="SECT2"
><H3
CLASS="SECT2"
><A
-NAME="AEN1062"
-></A
+NAME="AEN1063"
>5.1. I cannot connect to any websites. Or, I am getting
<SPAN
CLASS="QUOTE"
>"connection refused"</SPAN
-> message with every web page. Why?</H3
+> message with every web page. Why?</A
+></H3
><P
> There are several possibilities:</P
><P
CLASS="APPLICATION"
>Privoxy</SPAN
> is installed correctly, has not crashed, and is indeed running.
- Look at <SPAN
+ Turn on <SPAN
CLASS="APPLICATION"
>Privoxy's</SPAN
-> logs to see what they say.</P
+> logging and look at the logs to see what they say.</P
></LI
><LI
><P
CLASS="SECT2"
><A
NAME="ERROR503"
-></A
->5.2. Why am I getting a 503 Error (WSAECONNREFUSED) on every page?</H3
+>5.2. Why am I getting a 503 Error (WSAECONNREFUSED) on every page?</A
+></H3
><P
> More than likely this is a problem with your TCP/IP networking. ZoneAlarm has
been reported to cause this symptom -- even if not running! The solution is
><H3
CLASS="SECT2"
><A
-NAME="AEN1085"
-></A
+NAME="AEN1086"
>5.3. I just added a new rule, but the steenkin ad is
-still getting through. How?</H3
+still getting through. How?</A
+></H3
><P
> If the ad had been displayed before you added its URL, it will probably be
held in the browser's cache for some time, so it will be displayed without
CLASS="SECT2"
><A
NAME="BADSITE"
-></A
>5.4. One of my favorite sites does not work with Privoxy.
-What can I do?</H3
+What can I do?</A
+></H3
><P
> First verify that it is indeed a <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="DUN"
-></A
>5.5. After installing Privoxy, I have to log in
-every time I start IE. What gives?</H3
+every time I start IE. What gives?</A
+></H3
><P
> This is a quirk that effects the installation of
<SPAN
CLASS="SECT2"
><A
NAME="FTP"
-></A
>5.6. I cannot connect to any FTP sites. Privoxy
- is blocking me.</H3
+ is blocking me.</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="OSXIE"
-></A
>5.7. In Mac OSX, I can't configure Microsoft Internet Explorer to use
- Privoxy as the HTTP proxy.</H3
+ Privoxy as the HTTP proxy.</A
+></H3
><P
> Microsoft Internet Explorer (in versions like 5.1) respects system-wide
network settings. In order to change the HTTP proxy, open System
CLASS="SECT2"
><A
NAME="OSXUNINSTALL"
-></A
>5.8. In Mac OSX, I dragged the Privoxy folder to the trash in order to
uninstall it. Now the finder tells me I don't have sufficient privileges to
- empty the trash.</H3
+ empty the trash.</A
+></H3
><P
> Just dragging the <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="OSXIMAGES"
-></A
>5.9. In Mac OSX Panther (10.3), images often fail to load and/or I
experience random delays in page loading. I'm using
<TT
CLASS="LITERAL"
>localhost</TT
-> as my browser's proxy setting.</H3
+> as my browser's proxy setting.</A
+></H3
><P
> We believe this is due to an IPv6-related bug in OSX, but don't fully
understand the issue yet. In any case, changing the proxy setting to
CLASS="SECT2"
><A
NAME="BLANKPAGE"
-></A
>5.10. I get a completely blank page at one site. <SPAN
CLASS="QUOTE"
>"View Source"</SPAN
CLASS="MARKUP"
><html><body></body></html></SPAN
>. Without
- Privoxy the page loads fine.</H3
+ Privoxy the page loads fine.</A
+></H3
><P
> Chances are that the site suffers from a bug in
<A
CLASS="SECT2"
><A
NAME="NOHOSTNAME"
-></A
>5.11. My logs show many <SPAN
CLASS="QUOTE"
>"Unable to get my own hostname"</SPAN
> lines.
-Why?</H3
+Why?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="INUSE"
-></A
>5.12. When I try to launch Privoxy, I get an
error message <SPAN
CLASS="QUOTE"
>"port 8118 is already in use"</SPAN
> (or similar wording).
-Why?</H3
+Why?</A
+></H3
><P
> Port 8118 is <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="DEMORONIZER"
-></A
->5.13. Pages with UTF-8 fonts are garbled.</H3
+>5.13. Pages with UTF-8 fonts are garbled.</A
+></H3
><P
> This is caused by the <SPAN
CLASS="QUOTE"
CLASS="SECT2"
><A
NAME="DEMORONIZER2"
-></A
>5.14. Why are binary files (such as images) corrupted when Privoxy
- is used?</H3
+ is used?</A
+></H3
><P
> This may also be caused by the <SPAN
CLASS="QUOTE"
>"demoronizer"</SPAN
> filter,
- in conjunction with a web server that is misreporting a file type. Binary
+ in conjunction with a web server that is misreporting the content type. Binary
files are exempted from <SPAN
CLASS="APPLICATION"
>Privoxy's</SPAN
CLASS="SECT2"
><A
NAME="DEMORONIZER3"
-></A
>5.15. What is the <SPAN
CLASS="QUOTE"
>"demoronizer"</SPAN
-> and why is it there?</H3
+> and why is it there?</A
+></H3
><P
> The original demoronizer was a Perl script that cleaned up HTML pages which
were created with certain Microsoft products. MS has used proprietary extensions
CLASS="SECT2"
><A
NAME="WINDOWOPEN"
-></A
>5.16. Why do I keep seeing <SPAN
CLASS="QUOTE"
>"PrivoxyWindowOpen()"</SPAN
-> in raw source code?</H3
+> in raw source code?</A
+></H3
><P
> <SPAN
CLASS="APPLICATION"
CLASS="SECT2"
><A
NAME="DNSERRORS"
-></A
>5.17. I am getting too many DNS errors like <SPAN
CLASS="QUOTE"
>"404 No Such Domain"</SPAN
>. Why
- can't Privoxy do this better?</H3
+ can't Privoxy do this better?</A
+></H3
><P
> There are potentially several factors here. First of all, the DNS resolution
is done by the underlying operating system -- not
CLASS="SECT2"
><A
NAME="ALLCPU"
-></A
>5.18. At one site Privoxy just hangs, and starts taking
- all CPU. Why is this?</H3
+ all CPU. Why is this?</A
+></H3
><P
> This is probably a manifestation of the <SPAN
CLASS="QUOTE"
CLASS="SECT2"
><A
NAME="SLOWCRAWL"
-></A
>5.19. I just installed Privoxy, and all my
-browsing has slowed to a crawl. What gives?</H3
+browsing has slowed to a crawl. What gives?</A
+></H3
><P
> This should not happen, and for the overwhelming number of users world-wide,
it does not happen. I would suspect some inadvertent interaction of software
CLASS="SECT2"
><A
NAME="PREVENTCOMP"
-></A
->5.20. Why do my filters work on some sites but not on others?</H3
+>5.20. Why do my filters work on some sites but not on others?</A
+></H3
><P
> It's probably due to compression. It is a common practice for web servers to
send their content <SPAN
then let the browser <SPAN
CLASS="QUOTE"
>"uncompress"</SPAN
-> them. <SPAN
+> them. When compiled with zlib support
+ <SPAN
CLASS="APPLICATION"
>Privoxy</SPAN
-> does not (yet)
- support compression. But we can force the web server to bend to our will ;-)
- So for filtering, make sure you have <A
+> can decompress content before filtering, otherwise you may want to enable
+<A
HREF="../user-manual/actions-file.html#PREVENT-COMPRESSION"
TARGET="_top"
>prevent-compression</A
->
- turned ON! </P
+>.</P
></DIV
></DIV
><DIV