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+ <hr align="left" width="100%">
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<div class="SECT1">
<h1 class="SECT1"><a name="MISC" id="MISC">4. Miscellaneous</a></h1>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN738" id="AEN738">4.1. How much does
+ <h3 class="SECT2"><a name="SLOWSME" id="SLOWSME">4.1. How much does
Privoxy slow my browsing down? This has to add extra time to
browsing.</a></h3>
you get a page saying <span class="QUOTE">"Privoxy is not
working"</span> instead, then your browser didn't use <span class=
"APPLICATION">Privoxy</span> for the request, hence it could not be
- intercepted, and you have accessed the <span class=
- "emphasis EMPHASIS c2">real</span> web site at config.privoxy.org.</p>
+ intercepted, and you have accessed the <span class="emphasis"><i class=
+ "EMPHASIS">real</i></span> web site at config.privoxy.org.</p>
+
+ <p>Note that config.privoxy.org resolves to a public IP address. If you
+ use config.privoxy.org as ping or traceroute target you will reach the
+ system on the Internet (Privoxy can't intercept ICMP requests). If you
+ want to ping the system Privoxy runs on, you should use its IP address
+ or local DNS name (if it has got one).</p>
</div>
<div class="SECT2">
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN803" id="AEN803">4.8. Can Privoxy
- guarantee I am anonymous?</a></h3>
+ <h3 class="SECT2"><a name="ANONFORSURE" id="ANONFORSURE">4.8. Can
+ Privoxy guarantee I am anonymous?</a></h3>
<p>No. Your chances of remaining anonymous are improved, but unless you
<a href="#TOR" target="_top">chain <span class=
assume that everything you do on the Web can be traced back to you.</p>
<p><span class="APPLICATION">Privoxy</span> can remove various
- information about you, and allows <span class=
- "emphasis EMPHASIS c2">you</span> more freedom to decide which sites
- you can trust, and what details you want to reveal. But it neither
- hides your IP address, nor can it guarantee that the rest of the system
- behaves correctly. There are several possibilities how a web sites can
- find out who you are, even if you are using a strict <span class=
+ information about you, and allows <span class="emphasis"><i class=
+ "EMPHASIS">you</i></span> more freedom to decide which sites you can
+ trust, and what details you want to reveal. But it neither hides your
+ IP address, nor can it guarantee that the rest of the system behaves
+ correctly. There are several possibilities how a web sites can find out
+ who you are, even if you are using a strict <span class=
"APPLICATION">Privoxy</span> configuration and chained it with
<span class="APPLICATION">Tor</span>.</p>
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN821" id="AEN821">4.9. A test site says I
- am not using a Proxy.</a></h3>
+ <h3 class="SECT2"><a name="PROXYTEST" id="PROXYTEST">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>
your local network. Using socks4a would work too, but with socks5 you
get more precise error messages.</p>
- <p>
Since <span class="APPLICATION">Privoxy</span> 3.0.5, its <a href=
+ <p>
<span class="APPLICATION">Privoxy's</span> <a href=
"../user-manual/config.html" target="_top">main configuration file</a>
is already prepared for <span class="APPLICATION">Tor</span>, if you
are using a default <span class="APPLICATION">Tor</span> configuration
"../user-manual/config.html#FORWARDING" target="_top">forwarding
section</a> and uncomment the line:</p>
- <table class="c3" border="0" width="100%">
+ <table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
<pre class="SCREEN">
-# forward-socks5 / 127.0.0.1:9050 .
+# forward-socks5t / 127.0.0.1:9050 .
</pre>
</td>
</tr>
</table>
+ <p>Note that if you got Tor through one of the bundles, you may have to
+ change the port from 9050 to 9150 (or even another one). For details,
+ please check the documentation on the <a href="https://torproject.org/"
+ target="_top">Tor website</a>.</p>
+
<p>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>
- <table class="c3" border="0" width="100%">
+ <table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
<pre class="SCREEN">
network by using their names, you will need additional exceptions that
look like this:</p>
- <table class="c3" border="0" width="100%">
+ <table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
<pre class="SCREEN">
<p>Save the modified configuration file and open <a href=
"http://config.privoxy.org/show-status" target=
- "_top">http://config.privoxy.org/show-status/</a> in your browser,
+ "_top">http://config.privoxy.org/show-status</a> in your browser,
confirm that <span class="APPLICATION">Privoxy</span> has reloaded its
configuration and that there are no other forward lines, unless you
know that you need them. If everything looks good, refer to <a href=
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN877" id="AEN877">4.11. Might some things
- break because header information or content is being altered?</a></h3>
+ <h3 class="SECT2"><a name="SITEBREAK" id="SITEBREAK">4.11. Might some
+ things break because header information or 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
server. The results of which could inadvertently cause pages to load
incorrectly, partially, or even not at all. And there may be no obvious
clues as to just what went wrong, or why. Nowhere will there be a
- message that says <span class="QUOTE">"<span class=
- "emphasis EMPHASIS c2">Turn off <tt class="LITERAL">fast-redirects</tt>
- or else!</span> "</span></p>
+ message that says <span class="QUOTE">"<span class="emphasis"><i class=
+ "EMPHASIS">Turn off <tt class="LITERAL">fast-redirects</tt> or
+ else!</i></span> "</span></p>
<p>Similar thoughts apply to modifying JavaScript, and, to a lesser
degree, HTML elements.</p>
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN891" id="AEN891">4.12. Can Privoxy act as
- a <span class="QUOTE">"caching"</span> proxy to speed up web
+ <h3 class="SECT2"><a name="CACHING" id="CACHING">4.12. Can Privoxy act
+ as a <span class="QUOTE">"caching"</span> proxy to speed up web
browsing?</a></h3>
<p>No, it does not have this ability at all. You want something like
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN901" id="AEN901">4.13. What about as a
- firewall? Can Privoxy protect me?</a></h3>
+ <h3 class="SECT2"><a name="FIREWALL" id="FIREWALL">4.13. What about as
+ a firewall? Can Privoxy protect me?</a></h3>
<p>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 can't protect your system from intrusion attempts. It
is, of course, perfectly possible to use <span class=
- "emphasis EMPHASIS c2">both</span>.</p>
+ "emphasis"><i class="EMPHASIS">both</i></span>.</p>
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN906" id="AEN906">4.14. I have large empty
+ <h3 class="SECT2"><a name="WASTED" id="WASTED">4.14. I have large empty
spaces / a checkerboard pattern now where 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 <span class="APPLICATION">Privoxy's</span> filters, and
- eliminating the <span class="emphasis EMPHASIS c2">entire</span> image
- references from the HTML page source.</p>
+ eliminating the <span class="emphasis"><i class=
+ "EMPHASIS">entire</i></span> image references from the HTML page
+ source.</p>
<p>But, this would consume considerably more CPU resources (IOW, slow
things down), would likely destroy the layout of some web pages which
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN914" id="AEN914">4.15. How can Privoxy
- filter Secure (HTTPS) URLs?</a></h3>
+ <h3 class="SECT2"><a name="SSL" id="SSL">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 class="emphasis EMPHASIS c2">secure</span>, there is little that
- <span class="APPLICATION">Privoxy</span> can do but hand the raw
- gibberish data though from one end to the other unprocessed.</p>
+ <span class="emphasis"><i class="EMPHASIS">secure</i></span>, there is
+ little that <span class="APPLICATION">Privoxy</span> can do but hand
+ the raw gibberish data though from one end to the other
+ unprocessed.</p>
<p>The only exception to this is blocking by host patterns, as the
client needs to tell <span class="APPLICATION">Privoxy</span> the name
</div>
<div class="SECT2">
- <h3 class="SECT2"><a name="AEN928" id="AEN928">4.16. Privoxy runs as a
+ <h3 class="SECT2"><a name="SECURE" id="SECURE">4.16. Privoxy runs as a
<span class="QUOTE">"server"</span>. How secure is it? Do I need to
take any special precautions?</a></h3>
<p>A <span class="QUOTE">"crunch"</span> simply means <span class=
"APPLICATION">Privoxy</span> intercepted <span class=
- "emphasis EMPHASIS c2">something</span>, nothing more. Often this is
- indeed ads or banners, but <span class="APPLICATION">Privoxy</span>
- uses the same mechanism for trapping requests for its own internal
- pages. For instance, a request for <span class=
- "APPLICATION">Privoxy's</span> configuration page at: <a href=
- "http://config.privoxy.org" target=
+ "emphasis"><i class="EMPHASIS">something</i></span>, nothing more.
+ Often this is indeed ads or banners, but <span class=
+ "APPLICATION">Privoxy</span> uses the same mechanism for trapping
+ requests for its own internal pages. For instance, a request for
+ <span class="APPLICATION">Privoxy's</span> configuration page at:
+ <a href="http://config.privoxy.org" target=
"_top">http://config.privoxy.org</a>, is intercepted (i.e. it does not
go out to the 'net), and the familiar CGI configuration is returned to
the browser, and the log consequently will show a <span class=
<div class="SECT2">
<h3 class="SECT2"><a name="DOWNLOADS" id="DOWNLOADS">4.21. Can Privoxy
- effect files that I download from a webserver? FTP server?</a></h3>
+ affect files that I download 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
<span class="QUOTE">"good"</span> content that we do want. <span class=
"APPLICATION">Privoxy</span> is blind to the differences, and can only
distinguish <span class="QUOTE">"good from bad"</span> by the
- configuration parameters <span class="emphasis EMPHASIS c2">we</span>
- give it.</p>
+ configuration parameters <span class="emphasis"><i class=
+ "EMPHASIS">we</i></span> give it.</p>
<p><span class="APPLICATION">Privoxy</span> knows the differences in
files according to the <span class="QUOTE">"Content Type"</span> as
<p>In short, filtering is <span class="QUOTE">"ON"</span> if a) the
content type as reported by the webserver is appropriate <span class=
- "emphasis EMPHASIS c2">and</span> b) the configuration allows it (or at
- least does not disallow it). That's it. There is no magic cookie
- anywhere to say this is <span class="QUOTE">"good"</span> and this is
- <span class="QUOTE">"bad"</span>. It's the configuration that lets it
- all happen or not.</p>
+ "emphasis"><i class="EMPHASIS">and</i></span> b) the configuration
+ allows it (or at least does not disallow it). That's it. There is no
+ magic cookie anywhere to say this is <span class="QUOTE">"good"</span>
+ and this is <span class="QUOTE">"bad"</span>. 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
off filtering for download sites (particularly if the content may be
plain text files and you are using version 3.0.2 or earlier) in your
<tt class="FILENAME">user.action</tt> file. And also, for any site or
- page where making <span class="emphasis EMPHASIS c2">any</span> changes
- at all to the content is to be avoided.</p>
+ page where making <span class="emphasis"><i class=
+ "EMPHASIS">any</i></span> changes at all to the content is to be
+ avoided.</p>
<p><span class="APPLICATION">Privoxy</span> does not do FTP at all,
only HTTP and HTTPS (SSL) protocols.</p>
adding your list to your <tt class="FILENAME">user.action</tt>
file:</p>
- <table class="c3" border="0" width="100%">
+ <table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
<pre class="SCREEN">
<table border="0">
<tbody>
<tr>
- <td><a href="http://www.privoxy.org/" target=
- "_top">http://www.privoxy.org/</a>, the <span class=
+ <td><a href="https://www.privoxy.org/" target=
+ "_top">https://www.privoxy.org/</a>, the <span class=
"APPLICATION">Privoxy</span> Home page.</td>
</tr>
</tbody>
<table border="0">
<tbody>
<tr>
- <td><a href="http://www.privoxy.org/faq/" target=
- "_top">http://www.privoxy.org/faq/</a>, the <span class=
+ <td><a href="https://www.privoxy.org/faq/" target=
+ "_top">https://www.privoxy.org/faq/</a>, the <span class=
"APPLICATION">Privoxy</span> FAQ.</td>
</tr>
</tbody>
<table border="0">
<tbody>
<tr>
- <td><a href="http://www.privoxy.org/developer-manual/" target=
- "_top">http://www.privoxy.org/developer-manual/</a>, the
+ <td><a href="https://www.privoxy.org/developer-manual/" target=
+ "_top">https://www.privoxy.org/developer-manual/</a>, the
<span class="APPLICATION">Privoxy</span> developer manual.</td>
</tr>
</tbody>
</tbody>
</table>
- <table border="0">
- <tbody>
- <tr>
- <td><a href="http://www.junkbusters.com/ht/en/cookies.html"
- target="_top">http://www.junkbusters.com/ht/en/cookies.html</a>,
- an explanation how cookies are used to track web users.</td>
- </tr>
- </tbody>
- </table>
-
- <table border="0">
- <tbody>
- <tr>
- <td><a href="http://www.junkbusters.com/ijb.html" target=
- "_top">http://www.junkbusters.com/ijb.html</a>, the original
- Internet Junkbuster.</td>
- </tr>
- </tbody>
- </table>
-
<table border="0">
<tbody>
<tr>
<table border="0">
<tbody>
<tr>
- <td><a href="http://www.pps.jussieu.fr/~jch/software/polipo/"
+ <td><a href=
+ "http://www.pps.univ-paris-diderot.fr/~jch/software/polipo/"
target=
- "_top">http://www.pps.jussieu.fr/~jch/software/polipo/</a>,
+ "_top">http://www.pps.univ-paris-diderot.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=
Privoxy, or maybe something that is based on the real Privoxy, but has
been modified.</p>
- <p>Lately there have been reports of problems with some kind of Privoxy
- versions that come preinstalled on some Netbooks. Some of the problems
- described are inconsistent with the behaviour of official Privoxy
- versions, which suggests that the preinstalled software may contain
- vendor modifications that we don't know about and thus can't debug.</p>
+ <p>Lately there have been reports of problems with some kind of
+ "parental control" software based on Privoxy that came preinstalled on
+ certain <a href="https://sourceforge.net/p/ijbswa/bugs/813/" target=
+ "_top">ASUS Netbooks</a>. The problems described are inconsistent with
+ the behaviour of official Privoxy versions, which suggests that the
+ preinstalled software may contain vendor modifications that we don't
+ know about and thus can't debug.</p>
<p>Privoxy's <a href="copyright.html">license</a> allows vendor
modifications, but the vendor has to comply with the license, which
</div>
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- <hr class="c1" width="100%">
+ <hr align="left" width="100%">
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