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+ <tr>
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+ <td width="10%" align="left" valign="bottom"><a href="index.html" accesskey="P">Prev</a></td>
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+ <div class="SECT1">
+ <h1 class="SECT1"><a name="GENERAL" id="GENERAL">1. General Information</a></h1>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WHO-USES" id="WHO-USES">1.1. Who should give <span class="APPLICATION">Privoxy</span>
+ a try?</a></h3>
+ <p>Anyone who is interested in security, privacy, or in finer-grained control over their web and Internet
+ experience.</p>
</div>
- <div class="SECT1">
- <h1 class="SECT1">
- <a name="GENERAL">1. General Information</a>
- </h1>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="WHO-USES">1.1. Who should give <span class=
- "APPLICATION">Privoxy</span> a try?</a>
- </h3>
- <p>
- Anyone who is interested in security, privacy, or in finer-grained
- control over their web and Internet experience.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="BESTCHOICE">1.2. Is Privoxy the best choice for me?</a>
- </h3>
- <p>
- <span class="APPLICATION">Privoxy</span> is certainly a good
- choice, especially for those who want more control and security.
- Those with the willingness to read the documentation and the
- ability to fine-tune their installation will benefit the most.
- </p>
- <p>
- One of <span class="APPLICATION">Privoxy's</span> strengths is that
- it is highly configurable giving you the ability to completely
- personalize your installation. Being familiar with, or at least
- having an interest in learning about <a href=
- "http://en.wikipedia.org/wiki/Http" target="_top">HTTP</a> and
- other networking protocols, <a href=
- "http://en.wikipedia.org/wiki/Html" target="_top">HTML</a>, and <a
- href="http://en.wikipedia.org/wiki/Regular_expressions" target=
- "_top"><span class="QUOTE">"Regular Expressions"</span></a> will be
- a big plus and will help you get the most out of <span class=
- "APPLICATION">Privoxy</span>. A new installation just includes a
- very basic configuration. The user should take this as a starting
- point only, and enhance it as he or she sees fit. In fact, the user
- is encouraged, and expected to, fine-tune the configuration.
- </p>
- <p>
- Much of <span class="APPLICATION">Privoxy's</span> configuration
- can be done with a <a href=
- "http://en.wikipedia.org/wiki/Web_browser" target="_top">Web
- browser</a>. But there are areas where configuration is done using
- a <a href="http://en.wikipedia.org/wiki/Text_editors" target=
- "_top">text editor</a> to edit configuration files. Also note that
- the web-based action editor doesn't use authentication and should
- only be enabled in environments where all clients with access to
- <span class="APPLICATION">Privoxy</span> listening port can be
- trusted.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="PROXYMORON">1.3. What is a <span class=
- "QUOTE">"proxy"</span>? How does Privoxy work?</a>
- </h3>
- <p>
- A <a href="http://en.wikipedia.org/wiki/Proxy_server" target=
- "_top">web proxy</a> is a service, based on a software such as
- <span class="APPLICATION">Privoxy</span>, that clients (i.e.
- browsers) can use instead of connecting to web servers directly.
- The clients then ask the proxy to request objects (web pages,
- images, movies etc) on their behalf and to forward the data to the
- clients. It is a <span class="QUOTE">"go-between"</span>. For
- details, see <a href="http://en.wikipedia.org/wiki/Proxy_server"
- target="_top">Wikipedia's proxy definition</a>.
- </p>
- <p>
- There are many reasons to use web proxies, such as security
- (firewalling), efficiency (caching) and others, and there are any
- number of proxies to accommodate those needs.
- </p>
- <p>
- <span class="APPLICATION">Privoxy</span> is a proxy that is
- primarily focused on privacy enhancement, ad and junk elimination
- and freeing the user from restrictions placed on his activities.
- Sitting between your browser(s) and the Internet, it is in a
- perfect position to filter outbound personal information that your
- browser is leaking, as well as inbound junk. It uses a variety of
- techniques to do this, all of which are under your complete control
- via the various configuration files and options. Being a proxy also
- makes it easier to share configurations among multiple browsers
- and/or users.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="OTHERSTUFF">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="APPLICATION">Privoxy</span> can be used to sanitize
- and customize web browsing.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="NEWJB">1.5. What is this new version of <span class=
- "QUOTE">"Junkbuster"</span>?</a>
- </h3>
- <p>
- A long time ago, there was the <a href=
- "http://www.junkbusters.com/ijb.html" target="_top"><span class=
- "APPLICATION">Internet Junkbuster</span></a>, by Anonymous Coders
- and <a href="http://www.junkbusters.com/" target="_top">Junkbusters
- Corporation</a>. This saved many users a lot of pain in the early
- days of web advertising and user tracking.
- </p>
- <p>
- But the web, its protocols and standards, and with it, the
- techniques for forcing ads on users, give up autonomy over their
- browsing, and for tracking them, keeps evolving. Unfortunately, the
- <span class="APPLICATION">Internet Junkbuster</span> did not.
- Version 2.0.2, published in 1998, was (and is) the last official <a
- href="http://www.junkbusters.com/ijbdist.html#release" target=
- "_top">release</a> available from <a href=
- "http://www.junkbusters.com" target="_top">Junkbusters
- Corporation</a>. Fortunately, it had been released under the GNU <a
- href="http://www.gnu.org/licenses/old-licenses/gpl-2.0.html"
- target="_top">GPL</a>, which allowed further development by others.
- </p>
- <p>
- So Stefan Waldherr started maintaining an improved version of the
- software, to which eventually a number of people contributed
- patches. It could already replace banners with a transparent image,
- and had a first version of pop-up killing, but it was still very
- closely based on the original, with all its limitations, such as
- the lack of HTTP/1.1 support, flexible per-site configuration, or
- content modification. The last release from this effort was version
- 2.0.2-10, published in 2000.
- </p>
- <p>
- Then, some <a href=
- "http://www.privoxy.org/user-manual/copyright.html#AUTHORS" target=
- "_top">developers</a> picked up the thread, and started turning the
- software inside out, upside down, and then reassembled it, adding
- many <a href=
- "http://www.privoxy.org/user-manual/introduction.html#FEATURES"
- target="_top">new features</a> along the way.
- </p>
- <p>
- The result of this is <span class="APPLICATION">Privoxy</span>,
- whose first stable version, 3.0, was released August, 2002.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="AEN85">1.6. Why <span class="QUOTE">"Privoxy"</span>? Why
- change the name from Junkbuster at all?</a>
- </h3>
- <p>
- Though outdated, <a href="http://junkbusters.com/" target=
- "_top">Junkbusters Corporation</a> continues to offer their
- original version of the <span class="APPLICATION">Internet
- Junkbuster</span>, so publishing our <span class=
- "APPLICATION">Junkbuster</span>-derived software under the same
- name led to confusion.
- </p>
- <p>
- There are also potential legal complications from our use of the
- <span class="APPLICATION">Junkbuster</span> name, which is a
- registered trademark of <a href="http://junkbusters.com/" target=
- "_top">Junkbusters Corporation</a>. There are, however, no
- objections from Junkbusters Corporation to the <span class=
- "APPLICATION">Privoxy</span> project itself, and they, in fact,
- still share our ideals and goals.
- </p>
- <p>
- The developers also believed that there are so many improvements
- over the original code, that it was time to make a clean break from
- the past and make a name in their own right.
- </p>
- <p>
- <span class="APPLICATION">Privoxy</span> is the <span class=
- "QUOTE">"<span class="emphasis"><i class="EMPHASIS">Privacy
- Enhancing Proxy</i></span>"</span>. Also, its content modification
- and junk suppression gives <span class="emphasis"><i class=
- "EMPHASIS">you</i></span>, the user, more control, more freedom,
- and allows you to browse your personal and <span class=
- "QUOTE">"<span class="emphasis"><i class=
- "EMPHASIS">private</i></span> edition"</span> of the web.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="DIFFERS">1.7. How does Privoxy differ from the old
- Junkbuster?</a>
- </h3>
- <p>
- <span class="APPLICATION">Privoxy</span> picks up where <span
- class="APPLICATION">Junkbuster</span> left off. The new <span
- class="APPLICATION">Privoxy</span> still blocks ads and banners,
- still manages <a href="http://en.wikipedia.org/wiki/Browser_cookie"
- target="_top">cookies</a>, and still helps protect your privacy.
- But, most of these features have been enhanced, and many new ones
- have been added, all in the same vein.
- </p>
- <p>
- <span class="APPLICATION">Privoxy</span>'s new features include:
- </p>
- <p>
- </p>
- <ul>
- <li>
- <p>
- Supports "Connection: keep-alive". Outgoing connections can be
- kept alive independently from the client.
- </p>
- </li>
- <li>
- <p>
- Supports IPv6, provided the operating system does so too, and
- the configure script detects it.
- </p>
- </li>
- <li>
- <p>
- Supports tagging which allows to change the behaviour based on
- client and server headers.
- </p>
- </li>
- <li>
- <p>
- Can be run as an "intercepting" proxy, which obviates the need
- to configure browsers individually.
- </p>
- </li>
- <li>
- <p>
- Sophisticated actions and filters for manipulating both server
- and client headers.
- </p>
- </li>
- <li>
- <p>
- Can be chained with other proxies.
- </p>
- </li>
- <li>
- <p>
- Integrated browser-based configuration and control utility 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>). Browser-based
- tracing of rule and filter effects. Remote toggling.
- </p>
- </li>
- <li>
- <p>
- Web page filtering (text replacements, removes banners based on
- size, invisible <span class="QUOTE">"web-bugs"</span> and HTML
- annoyances, etc.)
- </p>
- </li>
- <li>
- <p>
- Modularized configuration that allows for standard settings and
- user settings to reside in separate files, so that installing
- updated actions files won't overwrite individual user settings.
- </p>
- </li>
- <li>
- <p>
- Support for Perl Compatible Regular Expressions in the
- configuration files, and a more sophisticated and flexible
- configuration syntax.
- </p>
- </li>
- <li>
- <p>
- GIF de-animation.
- </p>
- </li>
- <li>
- <p>
- Bypass many click-tracking scripts (avoids script redirection).
- </p>
- </li>
- <li>
- <p>
- User-customizable HTML templates for most proxy-generated pages
- (e.g. "blocked" page).
- </p>
- </li>
- <li>
- <p>
- Auto-detection and re-reading of config file changes.
- </p>
- </li>
- <li>
- <p>
- Most features are controllable on a per-site or per-location
- basis.
- </p>
- </li>
- <li>
- <p>
- Many smaller new features added, limitations and bugs removed.
- </p>
- </li>
- </ul>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="WHATSANAD">1.8. How does Privoxy know what is an ad, and
- what is not?</a>
- </h3>
- <p>
- <span class="APPLICATION">Privoxy</span>'s approach to blocking ads
- is twofold:
- </p>
- <p>
- First, there are certain patterns in the <span class="emphasis"><i
- class="EMPHASIS">locations</i></span> (URLs) of banner images. This
- applies to both the path (you wouldn't guess how many web sites
- serve their banners from a directory called <span class=
- "QUOTE">"banners"</span>!) and the host (blocking the big banner
- hosting services like doublecklick.net already helps a lot). <span
- class="APPLICATION">Privoxy</span> takes advantage of this fact by
- using <a href="../user-manual/actions-file.html#AF-PATTERNS"
- target="_top">URL patterns</a> to sort out and block the requests
- for things that sound like they would be ads or banners.
- </p>
- <p>
- Second, banners tend to come in certain <span class="emphasis"><i
- class="EMPHASIS">sizes</i></span>. But you can't tell the size of
- an image by its URL without downloading it, and if you do, it's too
- late to save bandwidth. Therefore, <span class=
- "APPLICATION">Privoxy</span> also inspects the HTML sources of web
- pages while they are loaded, and replaces references to images with
- standard banner sizes by dummy references, so that your browser
- doesn't request them anymore in the first place.
- </p>
- <p>
- Both of this involves a certain amount of guesswork and is, of
- course, freely and readily configurable.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="AEN163">1.9. Can Privoxy make mistakes? 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 run into such situations at some
- point. It is tricky writing rules to cover every conceivable
- possibility, and not occasionally get false positives.
- </p>
- <p>
- But this should not be a big concern since the <span class=
- "APPLICATION">Privoxy</span> configuration is very flexible, and
- includes tools to help identify these types of situations so they
- can be addressed as needed, allowing you to customize your
- installation. (<a href="trouble.html#BADSITE">See the
- Troubleshooting section below</a>.)
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="AEN169">1.10. Will I have to configure Privoxy before I
- can use it?</a>
- </h3>
- <p>
- That depends on your expectations. The default installation should
- give you a good starting point, and block <span class="emphasis"><i
- class="EMPHASIS">most</i></span> ads and unwanted content, but many
- of the more advanced features are off by default, and require you
- to activate them.
- </p>
- <p>
- You do have to set up your browser to use <span class=
- "APPLICATION">Privoxy</span> (see the <a href=
- "installation.html#FIRSTSTEP">Installation section below</a>).
- </p>
- <p>
- And you will certainly run into situations where there are false
- positives, or ads not being blocked that you may not want to see.
- In these cases, you would certainly benefit by customizing <span
- class="APPLICATION">Privoxy's</span> configuration to more closely
- match your individual situation. And we encourage you to do this.
- This is where the real power of <span class=
- "APPLICATION">Privoxy</span> lies!
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="LAN">1.11. Can Privoxy run as a server on a network?</a>
- </h3>
- <p>
- Yes, <span class="APPLICATION">Privoxy</span> runs as a server
- already, and can easily be configured to <span class=
- "QUOTE">"serve"</span> more than one client. See <a href=
- "configuration.html#LANCONFIG">How can I set up Privoxy to act as a
- proxy for my LAN</a> below.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="BROWSERS2">1.12. My browser does the same things as
- Privoxy. Why should I use Privoxy at all?</a>
- </h3>
- <p>
- Modern browsers do indeed have <span class="emphasis"><i class=
- "EMPHASIS">some</i></span> of the same functionality as <span
- class="APPLICATION">Privoxy</span>. Maybe this is adequate for you.
- But <span class="APPLICATION">Privoxy</span> is very versatile and
- powerful, and can probably do a number of things your browser just
- can't.
- </p>
- <p>
- In addition, a proxy is good choice if you use multiple browsers,
- or have a LAN with multiple computers since <span class=
- "APPLICATION">Privoxy</span> can run as a server application. This
- way all the configuration is in one place, and you don't have to
- maintain a similar configuration for possibly many browsers or
- users.
- </p>
- <p>
- Note, however, that it's recommended to leverage both your
- browser's and <span class="APPLICATION">Privoxy's</span> privacy
- enhancing features at the same time. While your browser probably
- lacks some features <span class="APPLICATION">Privoxy</span>
- offers, it should also be able to do some things more reliable, for
- example restricting and suppressing JavaScript.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="WHYTRUST">1.13. Why should I trust Privoxy?</a>
- </h3>
- <p>
- The most important reason is because you have access to <span
- class="emphasis"><i class="EMPHASIS">everything</i></span>, and you
- can control everything. You can 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 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 <span class=
- "emphasis"><i class="EMPHASIS">yours</i></span>. In fact, we
- encourage this level of scrutiny. It is one reason we use <span
- class="APPLICATION">Privoxy</span> ourselves.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="LICENSE">1.14. Is there is a license or fee? What about a
- warranty? Registration?</a>
- </h3>
- <p>
- <span class="APPLICATION">Privoxy</span> is free software and
- licensed under the <a href=
- "http://www.gnu.org/licenses/old-licenses/gpl-2.0.html" target=
- "_top">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 href="copyright.html">Copyright</a>
- section for more information on the license and copyright. Or the
- <tt class="FILENAME">LICENSE</tt> file that should be included.
- </p>
- <p>
- There is <span class="emphasis"><i class="EMPHASIS">no
- warranty</i></span> of any kind, expressed, implied or otherwise.
- That is something that would cost real money ;-) There is no
- registration either.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="SPYWARE">1.15. Can Privoxy remove spyware? Adware?
- Viruses?</a>
- </h3>
- <p>
- No, at least not reliably enough to trust it. <span class=
- "APPLICATION">Privoxy</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> could help prevent contact
- from (known) sites that use such tactics with appropriate
- configuration rules, and thus could conceivably prevent
- contamination from such sites. However, keeping such a
- configuration up to date would require a lot of time and effort
- that would be better spend on keeping your software itself up to
- date so it doesn't have known vulnerabilities.
- </p>
- </div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="OTHERADS">1.16. Can I use Privoxy with other ad-blocking
- software?</a>
- </h3>
- <p>
- <span class="APPLICATION">Privoxy</span> should work fine with
- other proxies and other software in general.
- </p>
- <p>
- But it is probably not necessary to use <span class=
- "APPLICATION">Privoxy</span> in conjunction with other ad-blocking
- products, and this could conceivably cause undesirable results. It
- might be better to choose one software or the other and work a
- little to tweak its configuration to your liking.
- </p>
- <p>
- Note that this is an advice specific to ad blocking.
- </p>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="BESTCHOICE" id="BESTCHOICE">1.2. Is Privoxy the best choice for me?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> is certainly a good choice, especially for those who want more
+ control and security. Those with the willingness to read the documentation and the ability to fine-tune their
+ installation will benefit the most.</p>
+ <p>One of <span class="APPLICATION">Privoxy's</span> strengths is that it is highly configurable giving you the
+ ability to completely personalize your installation. Being familiar with, or at least having an interest in
+ learning about <a href="https://en.wikipedia.org/wiki/Http" target="_top">HTTP</a> and other networking
+ protocols, <a href="https://en.wikipedia.org/wiki/Html" target="_top">HTML</a>, and <a href=
+ "https://en.wikipedia.org/wiki/Regular_expressions" target="_top"><span class="QUOTE">"Regular
+ Expressions"</span></a> will be a big plus and will help you get the most out of <span class=
+ "APPLICATION">Privoxy</span>. A new installation just includes a very basic configuration. The user should take
+ this as a starting point only, and enhance it as he or she sees fit. In fact, the user is encouraged, and
+ expected to, fine-tune the configuration.</p>
+ <p>Much of <span class="APPLICATION">Privoxy's</span> configuration can be done with a <a href=
+ "https://en.wikipedia.org/wiki/Web_browser" target="_top">Web browser</a>. But there are areas where
+ configuration is done using a <a href="https://en.wikipedia.org/wiki/Text_editors" target="_top">text editor</a>
+ to edit configuration files. Also note that the web-based action editor doesn't use authentication and should
+ only be enabled in environments where all clients with access to <span class="APPLICATION">Privoxy</span>
+ listening port can be trusted.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="PROXYMORON" id="PROXYMORON">1.3. What is a <span class="QUOTE">"proxy"</span>? How
+ does Privoxy work?</a></h3>
+ <p>A <a href="https://en.wikipedia.org/wiki/Proxy_server" target="_top">web proxy</a> is a service, based on a
+ software such as <span class="APPLICATION">Privoxy</span>, that clients (i.e. browsers) can use instead of
+ connecting to web servers directly. The clients then ask the proxy to request objects (web pages, images, movies
+ etc) on their behalf and to forward the data to the clients. It is a <span class="QUOTE">"go-between"</span>. For
+ details, see <a href="https://en.wikipedia.org/wiki/Proxy_server" target="_top">Wikipedia's proxy
+ definition</a>.</p>
+ <p>There are many reasons to use web proxies, such as security (firewalling), efficiency (caching) and others,
+ and there are any number of proxies to accommodate those needs.</p>
+ <p><span class="APPLICATION">Privoxy</span> is a proxy that is primarily focused on privacy enhancement, ad and
+ junk elimination and freeing the user from restrictions placed on his activities. Sitting between your browser(s)
+ and the Internet, it is in a perfect position to filter outbound personal information that your browser is
+ leaking, as well as inbound junk. It uses a variety of techniques to do this, all of which are under your
+ complete control via the various configuration files and options. Being a proxy also makes it easier to share
+ configurations among multiple browsers and/or users.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="OTHERSTUFF" id="OTHERSTUFF">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="APPLICATION">Privoxy</span>
+ can be used to sanitize and customize web browsing.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="NEWJB" id="NEWJB">1.5. What is this new version of <span class=
+ "QUOTE">"Junkbuster"</span>?</a></h3>
+ <p>A long time ago, there was the <span class="APPLICATION">Internet Junkbuster</span>, by Anonymous Coders and
+ Junkbusters Corporation. This saved many users a lot of pain in the early days of web advertising and user
+ tracking.</p>
+ <p>But the web, its protocols and standards, and with it, the techniques for forcing ads on users, give up
+ autonomy over their browsing, and for tracking them, keeps evolving. Unfortunately, the <span class=
+ "APPLICATION">Internet Junkbuster</span> did not. Version 2.0.2, published in 1998, was the last official
+ release, available from Junkbusters Corporation. Fortunately, it had been released under the GNU <a href=
+ "https://www.gnu.org/licenses/old-licenses/gpl-2.0.html" target="_top">GPL</a>, which allowed further development
+ by others.</p>
+ <p>So Stefan Waldherr started maintaining an improved version of the software, to which eventually a number of
+ people contributed patches. It could already replace banners with a transparent image, and had a first version of
+ pop-up killing, but it was still very closely based on the original, with all its limitations, such as the lack
+ of HTTP/1.1 support, flexible per-site configuration, or content modification. The last release from this effort
+ was version 2.0.2-10, published in 2000.</p>
+ <p>Then, some <a href="https://www.privoxy.org/user-manual/copyright.html#AUTHORS" target="_top">developers</a>
+ picked up the thread, and started turning the software inside out, upside down, and then reassembled it, adding
+ many <a href="https://www.privoxy.org/user-manual/introduction.html#FEATURES" target="_top">new features</a>
+ along the way.</p>
+ <p>The result of this is <span class="APPLICATION">Privoxy</span>, whose first stable version, 3.0, was released
+ August, 2002.</p>
+ <p>As of 2012 the Junkbusters Corporation's website (http://www.junkbusters.com/) has been shut down, but Privoxy
+ is still actively maintained.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WHYPRIVOXY" id="WHYPRIVOXY">1.6. Why <span class="QUOTE">"Privoxy"</span>? Why change
+ the name from Junkbuster at all?</a></h3>
+ <p>Though outdated, Junkbusters Corporation continued to offer their original version of the <span class=
+ "APPLICATION">Internet Junkbuster</span> for a while, so publishing our <span class=
+ "APPLICATION">Junkbuster</span>-derived software under the same name would have led to confusion.</p>
+ <p>There were also potential legal reasons not to use the <span class="APPLICATION">Junkbuster</span> name, as it
+ was (and maybe still is) a registered trademark of Junkbusters Corporation. There were, however, no objections
+ from Junkbusters Corporation to the <span class="APPLICATION">Privoxy</span> project itself, and they, in fact,
+ shared our ideals and goals.</p>
+ <p>The Privoxy developers also believed that there were so many improvements over the original code, that it was
+ time to make a clean break from the past and make a name in their own right.</p>
+ <p><span class="APPLICATION">Privoxy</span> is the <span class="QUOTE">"<span class="emphasis"><i class=
+ "EMPHASIS">Privacy Enhancing Proxy</i></span>"</span>. Also, its content modification and junk suppression gives
+ <span class="emphasis"><i class="EMPHASIS">you</i></span>, the user, more control, more freedom, and allows you
+ to browse your personal and <span class="QUOTE">"<span class="emphasis"><i class="EMPHASIS">private</i></span>
+ edition"</span> of the web.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DIFFERS" id="DIFFERS">1.7. How does Privoxy differ from the old Junkbuster?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> picks up where <span class="APPLICATION">Junkbuster</span> left off.
+ <span class="APPLICATION">Privoxy</span> still blocks ads and banners, still manages <a href=
+ "https://en.wikipedia.org/wiki/Browser_cookie" target="_top">cookies</a>, and still helps protect your privacy.
+ But, most of these features have been enhanced, and many new ones have been added, all in the same vein.</p>
+ <p><span class="APPLICATION">Privoxy</span>'s new features include:</p>
+ <ul>
+ <li>
+ <p>Supports "Connection: keep-alive". Outgoing connections can be kept alive independently from the
+ client.</p>
+ </li>
+ <li>
+ <p>Supports IPv6, provided the operating system does so too, and the configure script detects it.</p>
+ </li>
+ <li>
+ <p>Supports tagging which allows to change the behaviour based on client and server headers.</p>
+ </li>
+ <li>
+ <p>Supports https inspection which allows to filter https requests.</p>
+ </li>
+ <li>
+ <p>Can be run as an "intercepting" proxy, which obviates the need to configure browsers individually.</p>
+ </li>
+ <li>
+ <p>Sophisticated actions and filters for manipulating both server and client headers.</p>
+ </li>
+ <li>
+ <p>Can be chained with other proxies.</p>
+ </li>
+ <li>
+ <p>Integrated browser-based configuration and control utility 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>).
+ Browser-based tracing of rule and filter effects. Remote toggling.</p>
+ </li>
+ <li>
+ <p>Web page filtering (text replacements, removes banners based on size, invisible <span class=
+ "QUOTE">"web-bugs"</span> and HTML annoyances, etc.)</p>
+ </li>
+ <li>
+ <p>Modularized configuration that allows for standard settings and user settings to reside in separate files,
+ so that installing updated actions files won't overwrite individual user settings.</p>
+ </li>
+ <li>
+ <p>Support for Perl Compatible Regular Expressions in the configuration files, and a more sophisticated and
+ flexible configuration syntax.</p>
+ </li>
+ <li>
+ <p>GIF de-animation.</p>
+ </li>
+ <li>
+ <p>Bypass many click-tracking scripts (avoids script redirection).</p>
+ </li>
+ <li>
+ <p>User-customizable HTML templates for most proxy-generated pages (e.g. "blocked" page).</p>
+ </li>
+ <li>
+ <p>Auto-detection and re-reading of config file changes.</p>
+ </li>
+ <li>
+ <p>Most features are controllable on a per-site or per-location basis.</p>
+ </li>
+ <li>
+ <p>Many smaller new features added, limitations and bugs removed.</p>
+ </li>
+ </ul>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WHATSANAD" id="WHATSANAD">1.8. How does Privoxy know what is an ad, and what is
+ not?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span>'s approach to blocking ads is twofold:</p>
+ <p>First, there are certain patterns in the <span class="emphasis"><i class="EMPHASIS">locations</i></span>
+ (URLs) of banner images. This applies to both the path (you wouldn't guess how many web sites serve their banners
+ from a directory called <span class="QUOTE">"banners"</span>!) and the host (blocking the big banner hosting
+ services like doublecklick.net already helps a lot). <span class="APPLICATION">Privoxy</span> takes advantage of
+ this fact by using <a href="../user-manual/actions-file.html#AF-PATTERNS" target="_top">URL patterns</a> to sort
+ out and block the requests for things that sound like they would be ads or banners.</p>
+ <p>Second, banners tend to come in certain <span class="emphasis"><i class="EMPHASIS">sizes</i></span>. But you
+ can't tell the size of an image by its URL without downloading it, and if you do, it's too late to save
+ bandwidth. Therefore, <span class="APPLICATION">Privoxy</span> also inspects the HTML sources of web pages while
+ they are loaded, and replaces references to images with standard banner sizes by dummy references, so that your
+ browser doesn't request them anymore in the first place.</p>
+ <p>Both of this involves a certain amount of guesswork and is, of course, freely and readily configurable.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="MISTAKES" id="MISTAKES">1.9. Can Privoxy make mistakes? 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 run into such situations at some point. It is tricky writing
+ rules to cover every conceivable possibility, and not occasionally get false positives.</p>
+ <p>But this should not be a big concern since the <span class="APPLICATION">Privoxy</span> configuration is very
+ flexible, and includes tools to help identify these types of situations so they can be addressed as needed,
+ allowing you to customize your installation. (<a href="trouble.html#BADSITE">See the Troubleshooting section
+ below</a>.)</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="CONFIGORNOT" id="CONFIGORNOT">1.10. Will I have to configure Privoxy before I can use
+ it?</a></h3>
+ <p>That depends on your expectations. The default installation should give you a good starting point, and block
+ <span class="emphasis"><i class="EMPHASIS">most</i></span> ads and unwanted content, but many of the more
+ advanced features are off by default, and require you to activate them.</p>
+ <p>You do have to set up your browser to use <span class="APPLICATION">Privoxy</span> (see the <a href=
+ "installation.html#FIRSTSTEP">Installation section below</a>).</p>
+ <p>And you will certainly run into situations where there are false positives, or ads not being blocked that you
+ may not want to see. In these cases, you would certainly benefit by customizing <span class=
+ "APPLICATION">Privoxy's</span> configuration to more closely match your individual situation. And we encourage
+ you to do this. This is where the real power of <span class="APPLICATION">Privoxy</span> lies!</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="LAN" id="LAN">1.11. Can Privoxy run as a server on a network?</a></h3>
+ <p>Yes, <span class="APPLICATION">Privoxy</span> runs as a server already, and can easily be configured to
+ <span class="QUOTE">"serve"</span> more than one client. See <a href="configuration.html#LANCONFIG">How can I set
+ up Privoxy to act as a proxy for my LAN</a> below.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="BROWSERS2" id="BROWSERS2">1.12. My browser does the same things as Privoxy. Why should
+ I use Privoxy at all?</a></h3>
+ <p>Modern browsers do indeed have <span class="emphasis"><i class="EMPHASIS">some</i></span> of the same
+ functionality as <span class="APPLICATION">Privoxy</span>. Maybe this is adequate for you. But <span class=
+ "APPLICATION">Privoxy</span> is very versatile and powerful, and can probably do a number of things your browser
+ just can't.</p>
+ <p>In addition, a proxy is good choice if you use multiple browsers, or have a LAN with multiple computers since
+ <span class="APPLICATION">Privoxy</span> can run as a server application. This way all the configuration is in
+ one place, and you don't have to maintain a similar configuration for possibly many browsers or users.</p>
+ <p>Note, however, that it's recommended to leverage both your browser's and <span class=
+ "APPLICATION">Privoxy's</span> privacy enhancing features at the same time. While your browser probably lacks
+ some features <span class="APPLICATION">Privoxy</span> offers, it should also be able to do some things more
+ reliably, for example restricting and suppressing JavaScript.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WHYTRUST" id="WHYTRUST">1.13. Why should I trust Privoxy?</a></h3>
+ <p>The most important reason is because you have access to <span class="emphasis"><i class=
+ "EMPHASIS">everything</i></span>, and you can control everything. You can 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 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 <span class="emphasis"><i class=
+ "EMPHASIS">yours</i></span>. In fact, we encourage this level of scrutiny. It is one reason we use <span class=
+ "APPLICATION">Privoxy</span> ourselves.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="LICENSE" id="LICENSE">1.14. Is there is a license or fee? What about a warranty?
+ Registration?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> is free software. It is free to use, copy, modify or distribute as
+ you wish under the terms of its license. Please see the <a href="copyright.html">Copyright</a> section for more
+ information on the license and copyright.</p>
+ <p>There is <span class="emphasis"><i class="EMPHASIS">no warranty</i></span> of any kind, expressed, implied or
+ otherwise. That is something that would cost real money ;-) There is no registration either.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="SPYWARE" id="SPYWARE">1.15. Can Privoxy remove spyware? Adware? Viruses?</a></h3>
+ <p>No, at least not reliably enough to trust it. <span class="APPLICATION">Privoxy</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> could help prevent contact from (known) sites that use such tactics
+ with appropriate configuration rules, and thus could conceivably prevent contamination from such sites. However,
+ keeping such a configuration up to date would require a lot of time and effort that would be better spend on
+ keeping your software itself up to date so it doesn't have known vulnerabilities.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="OTHERADS" id="OTHERADS">1.16. Can I use Privoxy with other ad-blocking
+ software?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> should work fine with other proxies and other software in
+ general.</p>
+ <p>But it is probably not necessary to use <span class="APPLICATION">Privoxy</span> in conjunction with other
+ ad-blocking products, and this could conceivably cause undesirable results. It might be better to choose one
+ software or the other and work a little to tweak its configuration to your liking.</p>
+ <p>Note that this is an advice specific to ad blocking.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="HELP-THE-DEVELOPERS" id="HELP-THE-DEVELOPERS">1.17. I would like to help you, what can
+ I do?</a></h3>
+ <div class="SECT3">
+ <h4 class="SECT3"><a name="PARTICIPATE" id="PARTICIPATE">1.17.1. Would you like to participate?</a></h4>
+ <p>Well, we <span class="emphasis"><i class="EMPHASIS">always</i></span> need help. There is something for
+ everybody who wants to help us. We welcome new developers, packagers, testers, documentation writers or really
+ anyone with a desire to help in any way. You <span class="emphasis"><i class="EMPHASIS">DO NOT</i></span> need
+ to be a <span class="QUOTE">"programmer"</span>. There are many other tasks available. In fact, the programmers
+ often can't spend as much time programming because of some of the other, more mundane things that need to be
+ done, like checking the Tracker feedback sections or responding to user questions on the mailing lists.</p>
+ <p>So first thing, subscribe to the <a href="https://lists.privoxy.org/mailman/listinfo/privoxy-users" target=
+ "_top">Privoxy Users</a> or the <a href="https://lists.privoxy.org/mailman/listinfo/privoxy-devel" target=
+ "_top">Privoxy Developers</a> mailing list, join the discussion, help out other users, provide general feedback
+ or report problems you noticed.</p>
+ <p>If you intend to help out with the trackers, you also might want to <a href=
+ "https://sourceforge.net/user/registration" target="_top">get an account on SourceForge.net</a> so we don't
+ confuse you with the other name-less users.</p>
+ <p>We also have a <a href="../developer-manual/index.html" target="_top">Developer's Manual</a>. While it is
+ partly out of date, it's still worth reading.</p>
+ <p>Our <a href="https://www.privoxy.org/gitweb/?p=privoxy.git;a=blob_plain;f=TODO;hb=HEAD" target="_top">TODO
+ list</a> may be of interest to you as well. Please let us know if you want to work on one of the items
+ listed.</p>
</div>
- <div class="SECT2">
- <h3 class="SECT2">
- <a name="HELP-THE-DEVELOPERS">1.17. I would like to help you, what
- can I do?</a>
- </h3>
- <div class="SECT3">
- <h4 class="SECT3">
- <a name="PARTICIPATE">1.17.1. Would you like to participate?</a>
- </h4>
- <p>
- Well, we <span class="emphasis"><i class=
- "EMPHASIS">always</i></span> need help. There is something for
- everybody who wants to help us. We welcome new developers,
- packagers, testers, documentation writers or really anyone with a
- desire to help in any way. You <span class="emphasis"><i class=
- "EMPHASIS">DO NOT</i></span> need to be a <span class=
- "QUOTE">"programmer"</span>. There are many other tasks
- available. In fact, the programmers often can't spend as much
- time programming because of some of the other, more mundane
- things that need to be done, like checking the Tracker feedback
- sections or responding to user questions on the mailing lists.
- </p>
- <p>
- So first thing, subscribe to the <a href=
- "https://lists.sourceforge.net/lists/listinfo/ijbswa-users"
- target="_top">Privoxy Users</a> or the <a href=
- "https://lists.sourceforge.net/lists/listinfo/ijbswa-developers"
- target="_top">Privoxy Developers</a> mailing list, join the
- discussion, help out other users, provide general feedback or
- report problems you noticed.
- </p>
- <p>
- If you intend to help out with the trackers, you also might want
- to <a href="https://sourceforge.net/account/register.php" target=
- "_top">get an account on SourceForge.net</a> so we don't confuse
- you with the other name-less users.
- </p>
- <p>
- We also have a <a href="../developer-manual/index.html" target=
- "_top">Developer's Manual</a>. While it is partly out of date,
- it's still worth reading.
- </p>
- <p>
- Our <a href=
- "http://ijbswa.cvs.sourceforge.net/viewvc/ijbswa/current/TODO?view=markup"
- target="_top">TODO list</a> may be of interest to you as well.
- Please let us know if you want to work on one of the items
- listed.
- </p>
- </div>
- <div class="SECT3">
- <h4 class="SECT3">
- <a name="DONATE">1.17.2. Would you like to donate?</a>
- </h4>
- <p>
- <span class="APPLICATION">Privoxy</span> is developed by unpaid
- volunteers and thus our current running costs are pretty low.
- Nevertheless, we have plans that will cost money in the future.
- We would like to get this money through donations made by our
- users.
- </p>
- <p>
- <span class="APPLICATION">Privoxy</span> has therefore become an
- associated project of <a href=
- "http://www.spi-inc.org/about-spi/about-spi" target=
- "_top">Software in the Public Interest (SPI)</a>, which allows us
- to receive tax-deductible donations in most western countries.
- </p>
- <p>
- We intend to use the donations to pay for our domain after
- transferring it to SPI. Our goal is to make sure there's no
- single point of failure and the bill gets paid and the site keeps
- running even if a some of the currently active developers were to
- suddenly disappear for a while.
- </p>
- <p>
- We would also like to spend some money on more reliable hosting,
- on hardware to help make sure <span class=
- "APPLICATION">Privoxy</span> keeps running on platforms the
- developers currently can't test on, and on technical books to
- educate our developers about said platforms or to improve their
- knowledge in general.
- </p>
- <p>
- If you enjoy our software and feel like helping out with a
- donation, please have a look at <a href=
- "http://www.spi-inc.org/donations" target="_top">SPI's donation
- page</a> to see what the options are.
- </p>
- </div>
+ <div class="SECT3">
+ <h4 class="SECT3"><a name="DONATE" id="DONATE">1.17.2. Would you like to donate?</a></h4>
+ <p>Donations are welcome. Our <a href=
+ "https://www.privoxy.org/gitweb/?p=privoxy.git;a=blob_plain;f=TODO;hb=HEAD" target="_top">TODO list</a> is
+ rather long and being able to pay one (or more) developers to work on Privoxy would make a huge difference,
+ even if it was only for a couple of weeks. Donations may also be used for Privoxy-related travel expenses (for
+ example to attend conferences), for hardware used for Privoxy development and for hosting expenses etc.</p>
+ <p><span class="APPLICATION">Privoxy</span> is an associated project of <a href="https://www.spi-inc.org/"
+ target="_top">Software in the Public Interest (SPI)</a>, which allows us to receive tax-deductible donations in
+ the United States. You can <a href="https://www.spi-inc.org/projects/privoxy/" target="_top">donate via
+ Paypal</a> and <a href="https://co.clickandpledge.com/advanced/default.aspx?wid=34115" target="_top">Click
+ & Pledge</a>. For details, please have a look at <a href="https://www.spi-inc.org/donations" target=
+ "_top">SPI's general donation page</a>.</p>
+ <p>If you have any questions regarding donations please mail to either the public user mailing list or, if it's
+ a private matter, to <a href="mailto:fk@fabiankeil.de" target="_top">Fabian Keil</a> (Privoxy's SPI liaison)
+ directly.</p>
</div>
</div>
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+ <div class="SECT2">
+ <h2 class="SECT2"><a name="SPONSOR" id="SPONSOR">1.18. How can I become a sponsor and get my logo or link on
+ privoxy.org?</a></h2>
+ <p>We are currently offering the following sponsor levels as an experiment:</p>
+ <div class="VARIABLELIST">
+ <dl>
+ <dt>Gold (12000 USD/year)</dt>
+ <dd>
+ <p>Logo or text link shown at the bottom of the <a href="https://www.privoxy.org/" target="_top">Privoxy
+ homepage</a>. Logo, link and self description on the <a href="https://www.privoxy.org/sponsors/" target=
+ "_top">sponsor page</a>.</p>
+ </dd>
+ <dt>Silver (1200 USD/year)</dt>
+ <dd>
+ <p>Logo or text link shown at the bottom of the <a href="https://www.privoxy.org/" target="_top">Privoxy
+ homepage</a>. Logo, link and self description on the <a href="https://www.privoxy.org/sponsors/" target=
+ "_top">sponsor page</a>.</p>
+ </dd>
+ <dt>Bronze (600 USD/year)</dt>
+ <dd>
+ <p>Logo and link on the <a href="https://www.privoxy.org/sponsors/" target="_top">sponsor page</a>.</p>
+ </dd>
+ </dl>
+ </div>
+ <p>The logo sizes depend on the sponsor level. Logos are served from our server, no requests are made to the
+ sponsor website unless the links are being used.</p>
+ <p>Link targets are without path (<span class="QUOTE">"https://www.example.org/"</span> not <span class=
+ "QUOTE">"https://www.example.org/seo/keyword/spam/"</span>).</p>
+ <p>The details may change over time but changes will only affect new sponsors (or existing sponsors that
+ explicitly agreed to the changes).</p>
+ <p>If you want to become a sponsor, please contact <a href="mailto:fk@fabiankeil.de" target="_top">Fabian
+ Keil</a> and include the link target in the mail. New sponsors are only accepted if no <a href=
+ "../user-manual/copyright.html#AUTHORS" target="_top">Privoxy team</a> member objects.</p>
</div>
- </body>
+ </div>
+ <div class="NAVFOOTER">
+ <hr align="left" width="100%">
+ <table summary="Footer navigation table" width="100%" border="0" cellpadding="0" cellspacing="0">
+ <tr>
+ <td width="33%" align="left" valign="top"><a href="index.html" accesskey="P">Prev</a></td>
+ <td width="34%" align="center" valign="top"><a href="index.html" accesskey="H">Home</a></td>
+ <td width="33%" align="right" valign="top"><a href="installation.html" accesskey="N">Next</a></td>
+ </tr>
+ <tr>
+ <td width="33%" align="left" valign="top">Privoxy Frequently Asked Questions</td>
+ <td width="34%" align="center" valign="top"> </td>
+ <td width="33%" align="right" valign="top">Installation</td>
+ </tr>
+ </table>
+ </div>
+</body>
</html>
-
projects / privoxy.git / blobdiff