<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
-
<html>
<head>
<title>Miscellaneous</title>
<link rel="PREVIOUS" title="Configuration" href="configuration.html">
<link rel="NEXT" title="Troubleshooting" href="trouble.html">
<link rel="STYLESHEET" type="text/css" href="../p_doc.css">
- <meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
-
<body class="SECT1" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink=
"#840084" alink="#0000FF">
<div class="NAVHEADER">
<th colspan="3" align="center">Privoxy Frequently Asked
Questions</th>
</tr>
-
<tr>
<td width="10%" align="left" valign="bottom"><a href=
"configuration.html" accesskey="P">Prev</a></td>
-
<td width="80%" align="center" valign="bottom"></td>
-
<td width="10%" align="right" valign="bottom"><a href="trouble.html"
accesskey="N">Next</a></td>
</tr>
</table>
<hr align="left" width="100%">
</div>
-
<div class="SECT1">
<h1 class="SECT1"><a name="MISC" id="MISC">4. Miscellaneous</a></h1>
-
<div class="SECT2">
<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>
-
<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, the size of the page, the bandwidth of the
connection, etc.</p>
-
<p>Overall, it should not slow you down any in real terms, and may
actually help speed things up since ads, banners and other junk are not
typically being retrieved and displayed. The actual processing time
very quickly. This is typically more than offset by time saved not
downloading and rendering ad images and other junk content (if ad
blocking is being used).</p>
-
<p><span class="QUOTE">"Filtering"</span> content via the <tt class=
"LITERAL"><a href="../user-manual/actions-file.html#FILTER" target=
"_top">filter</a></tt> or <tt class="LITERAL"><a href=
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 but zlib support isn't available,
compression is often disabled (see <a href=
"../user-manual/actions-file.html#PREVENT-COMPRESSION" target=
well, although it's probably smaller than you might think. Again, the
page size, etc. will determine how much of an impact.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="LOADINGTIMES" id="LOADINGTIMES">4.2. I
notice considerable delays in page requests. What's wrong?</a></h3>
-
<p>If you use any <tt class="LITERAL"><a href=
"../user-manual/actions-file.html#FILTER" target="_top">filter</a></tt>
action, such as filtering banners by size, web-bugs etc, or the
"_top">deanimate-gifs</a></tt> action, the entire document must be
loaded into memory in order for the filtering mechanism to work, and
nothing is sent to the browser during this time.</p>
-
<p>The loading time typically does not really change much in real
numbers, but the feeling is different, because most browsers are able
to start rendering incomplete content, giving the user a feeling of "it
page where there is filtering being done. But overall, the difference
should be very minimal. If there is a big impact, then probably some
other situation is contributing (like anti-virus software).</p>
-
<p>Filtering is automatically disabled for inappropriate MIME types.
But note that if the web server mis-reports the MIME type, then content
that should not be filtered, could be. <span class=
content because of the MIME type as reported by the server, or because
of some configuration setting that enables/disables filtering.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="CONFIGURL" id="CONFIGURL">4.3. What are
"http://config.privoxy.org/" and "http://p.p/"?</a></h3>
-
<p><a href="http://config.privoxy.org/" target=
"_top">http://config.privoxy.org/</a> is the address of <span class=
"APPLICATION">Privoxy</span>'s built-in user interface, and <a href=
"http://p.p/" target="_top">http://p.p/</a> is a shortcut for it.</p>
-
<p>Since <span class="APPLICATION">Privoxy</span> sits between your web
browser and the Internet, it can simply intercept requests for these
addresses and answer them with its built-in <span class="QUOTE">"web
server"</span>.</p>
-
<p>This also makes for a good test for your browser configuration: If
entering the URL <a href="http://config.privoxy.org/" target=
"_top">http://config.privoxy.org/</a> takes you to a page saying
"APPLICATION">Privoxy</span> for the request, hence it could not be
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">
<h3 class="SECT2"><a name="NEWADS" id="NEWADS">4.4. How can I submit
new ads, or report problems?</a></h3>
-
<p>Please see the <a href="contact.html">Contact section</a> for
various ways to interact with the developers.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="NEWADS2" id="NEWADS2">4.5. If I do submit
missed ads, will they be included in future updates?</a></h3>
-
<p>Whether such submissions are eventually included in the <tt class=
"FILENAME">default.action</tt> configuration file depends on how
significant the issue is. We of course want to address any potential
user's <tt class="FILENAME">user.action</tt>, and thus would be
unlikely to be included.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="NOONECARES" id="NOONECARES">4.6. Why doesn't
anyone answer my support 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 one has had time to yet investigate it thoroughly, it
information was provided to help us help you. Your efforts are not
wasted, and we do appreciate them.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="IP" id="IP">4.7. How can I hide my IP
address?</a></h3>
-
<p>If you run both the browser and <span class=
"APPLICATION">Privoxy</span> locally, you cannot hide your IP address
with <span class="APPLICATION">Privoxy</span> or ultimately any other
software alone. The server needs to know your IP address so that it
knows where to send the responses back.</p>
-
<p>There are many publicly usable "anonymous" proxies out there, which
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
to authenticate, not because they would offer any real anonymity. Most
of them will log your IP address and make it available to the
fact you can't even rule out that some of them only exist to *collect*
information on (those suspicious) people with a more than average
preference for privacy.</p>
-
<p>If you want to hide your IP address from most adversaries, you
should consider chaining <span class="APPLICATION">Privoxy</span> with
<a href="https://www.torproject.org/" target="_top">Tor</a>. The
do I use <span class="APPLICATION">Privoxy</span> together with
<span class="APPLICATION">Tor</span> section</a> just below.</p>
</div>
-
<div class="SECT2">
<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=
"APPLICATION">Privoxy</span> with <span class=
"APPLICATION">Tor</span></a> or a similar proxy and know what you're
doing when it comes to configuring the rest of your system, you should
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"><i class=
"EMPHASIS">you</i></span> more freedom to decide which sites you can
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>
-
<p>Most of <span class="APPLICATION">Privoxy's</span> privacy-enhancing
features can be easily subverted by an insecure browser configuration,
therefore you should use a browser that can be configured to only
"APPLICATION">Privoxy</span> modify the User-Agent header, if websites
can get all the information they want through JavaScript, ActiveX,
Flash, Java etc.</p>
-
<p>A few browsers disclose the user's email address in certain
situations, such as when transferring a file by FTP. <span class=
"APPLICATION">Privoxy</span> does not filter FTP. If you need this
feature, or are concerned about the mail handler of your browser
disclosing your email address, you might consider products such as
<span class="APPLICATION">NSClean</span>.</p>
-
<p>Browsers available only as binaries could use non-standard headers
to give out any information they can have access to: see the
manufacturer's license agreement. It's impossible to anticipate and
paranoid prefer browsers available as source code, because anticipating
their behavior is easier. Trust the source, Luke!</p>
</div>
-
<div class="SECT2">
<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>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="TOR" id="TOR">4.10. How do I use Privoxy
together with Tor?</a></h3>
-
<p>Before you configure <span class="APPLICATION">Privoxy</span> to use
<a href="https://www.torproject.org/" target="_top">Tor</a>, please
follow the <i class="CITETITLE">User Manual</i> chapters <a href=
and <a href="../user-manual/startup.html" target="_top">5. Startup</a>
to make sure <span class="APPLICATION">Privoxy</span> itself is setup
correctly.</p>
-
<p>If it is, refer to <a href=
"https://www.torproject.org/documentation.html" target="_top">Tor's
extensive documentation</a> to learn how to install <span class=
"APPLICATION">Tor</span>'s logfile says that <span class="QUOTE">"Tor
has successfully opened a circuit"</span> and it <span class=
"QUOTE">"looks like client functionality is working"</span>.</p>
-
<p>If either <span class="APPLICATION">Tor</span> or <span class=
"APPLICATION">Privoxy</span> isn't working, their combination most
likely will neither. Testing them on their own will also help you to
<span class="APPLICATION">Tor</span> developers. If <span class=
"APPLICATION">Tor</span> isn't working, don't send bug reports to the
<span class="APPLICATION">Privoxy</span> Team.</p>
-
<p>If you verified that <span class="APPLICATION">Privoxy</span> and
<span class="APPLICATION">Tor</span> are working, it is time to connect
them. As far as <span class="APPLICATION">Privoxy</span> is concerned,
done through <span class="APPLICATION">Tor</span> and thus invisible to
your local network. Using socks4a would work too, but with socks5 you
get more precise error messages.</p>
-
<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
"APPLICATION">Privoxy</span>, you just have to edit the <a href=
"../user-manual/config.html#FORWARDING" target="_top">forwarding
section</a> and uncomment the line:</p>
-
<table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
<pre class="SCREEN">
-# forward-socks5t / 127.0.0.1:9050 .
-
-</pre>
+ # 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 border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
- <pre class="SCREEN">
-# forward 192.168.*.*/ .
+ <pre class="SCREEN"># forward 192.168.*.*/ .
# forward 10.*.*.*/ .
# forward 127.*.*.*/ .
-
-</pre>
+ </pre>
</td>
</tr>
</table>
-
<p>Unencrypted connections to systems in these address ranges will be
as (un)secure as the local network is, but the alternative is 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>
-
<table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
- <pre class="SCREEN">
-# forward localhost/ .
-
-</pre>
+ <pre class="SCREEN"># forward localhost/ .
+ </pre>
</td>
</tr>
</table>
-
<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,
"https://wiki.torproject.org/noreply/TheOnionRouter/TorFAQ#IsMyConnectionPrivate"
target="_top">Tor Faq 4.2</a> to learn how to verify that you are
really using <span class="APPLICATION">Tor</span>.</p>
-
<p>Afterward, please take the time to at least skim through the rest of
<span class="APPLICATION">Tor's</span> documentation. Make sure you
understand what <span class="APPLICATION">Tor</span> does, why it is no
replacement for application level security, and why you probably don't
want to use it for unencrypted logins.</p>
</div>
-
<div class="SECT2">
<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
dynamically decide what to display and how to display it. What you see,
and what I see, might be very different. There are many, many ways that
this can be handled, so having hard and fast rules, is tricky.</p>
-
<p>The <span class="QUOTE">"User-Agent"</span> is sometimes used in
this way to identify the browser, and adjust content accordingly.</p>
-
<p>Also, different browsers use different encodings of non-English
characters, certain web servers convert pages on-the-fly according to
the User Agent header. Giving a <span class="QUOTE">"User Agent"</span>
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>
-
<p>If you have problems with a site, you will have to adjust your
configuration accordingly. Cookies are probably the most likely
adjustment that may be required, but by no means the only one.</p>
</div>
-
<div class="SECT2">
<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
<a href="http://www.squid-cache.org/" target="_top">Squid</a> or
<a href="http://www.pps.jussieu.fr/~jch/software/polipo/" target=
chapter</a> in the <a href="../user-manual/index.html" target=
"_top">user manual</a> for details.</p>
</div>
-
<div class="SECT2">
<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"><i class="EMPHASIS">both</i></span>.</p>
</div>
-
<div class="SECT2">
<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"><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
rely on the banners utilizing a certain amount of page space, and might
tables for instance). Also, making ads and banners disappear without
any trace complicates troubleshooting, and would sooner or later be
problematic.</p>
-
<p>The better alternative is to instead let them stay, and block the
resulting requests for the banners themselves as is now the case. This
leaves either empty space, or the familiar checkerboard pattern.</p>
-
<p>So the developers won't support this in the default configuration,
but you can of course define appropriate filters yourself to achieve
this.</p>
</div>
-
<div class="SECT2">
<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"><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
of the remote server, so that <span class="APPLICATION">Privoxy</span>
can establish the connection. If that name matches a host-only pattern,
the connection will be blocked.</p>
-
<p>As far as ad blocking is concerned, this is less of a restriction
than it may seem, since ad sources are often identifiable by the host
name, and often the banners to be placed in an encrypted page come
unencrypted nonetheless for efficiency reasons, which exposes them to
the full power of <span class="APPLICATION">Privoxy</span>'s ad
blocking.</p>
-
<p><span class="QUOTE">"Content cookies"</span> (those that are
embedded in the actual HTML or JS page content, see <tt class=
"LITERAL"><a href=
seem to be a very common scenario since most cookies come by
traditional means.</p>
</div>
-
<div class="SECT2">
<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>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 <span class="APPLICATION">Privoxy</span> listens to
requests from <span class="QUOTE">"localhost"</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 <span class="APPLICATION">Privoxy</span> serve as a LAN
external interfaces. ACLs can be defined in addition, and using a
firewall is always good too. Better safe than sorry.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="TURNOFF" id="TURNOFF">4.17. Can I
temporarily disable Privoxy?</a></h3>
-
<p><span class="APPLICATION">Privoxy</span> doesn't have a transparent
proxy mode, but you can toggle off blocking and content filtering.</p>
-
<p>The easiest way to do that is to point your browser to the remote
toggle URL: <a href="http://config.privoxy.org/toggle" target=
"_top">http://config.privoxy.org/toggle</a>.</p>
-
<p>See the <a href="../user-manual/appendix.html#BOOKMARKLETS" target=
"_top">Bookmarklets section</a> of the <i class="CITETITLE">User
Manual</i> for an easy way to access this feature. Note that this is a
feature that may need to be enabled in the main <tt class=
"FILENAME">config</tt> file.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="REALLYOFF" id="REALLYOFF">4.18. When
<span class="QUOTE">"disabled"</span> is Privoxy totally out of the
picture?</a></h3>
-
<p>No, this just means all optional filtering and actions are disabled.
<span class="APPLICATION">Privoxy</span> is still acting as a proxy,
but just doing less of the things that <span class=
still a <span class="QUOTE">"middle-man"</span> in the interaction
between your browser and web sites. See below to bypass the proxy.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="TURNOFF2" id="TURNOFF2">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=
"APPLICATION">Privoxy</span> issue. Modern browsers typically do have
settings for not proxying certain sites. Check your browser's help
files.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="CRUNCH" id="CRUNCH">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>?</a></h3>
-
- <p>A <span class="QUOTE">"crunch"</span> simply means <span class=
+ <p>A <span class="QUOTE">"crunch"</span> means <span class=
"APPLICATION">Privoxy</span> intercepted <span class=
"emphasis"><i class="EMPHASIS">something</i></span>, nothing more.
Often this is indeed ads or banners, but <span class=
go out to the 'net), and the familiar CGI configuration is returned to
the browser, and the log consequently will show a <span 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">
<h3 class="SECT2"><a name="DOWNLOADS" id="DOWNLOADS">4.21. Can Privoxy
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
true of <span class="APPLICATION">Privoxy</span>. If there is a match
for a <tt class="LITERAL"><a href=
"../user-manual/actions-file.html#BLOCK" target="_top">block</a></tt>
pattern, it will still be blocked, and of course this is obvious.</p>
-
<p>Filtering is potentially more of a concern since the results are not
always so obvious, and the effects of filtering are there whether the
file is simply viewed, or downloaded. And potentially whether the
distinguish <span class="QUOTE">"good from bad"</span> by the
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
reported by the webserver. If this is reported accurately (e.g.
webserver. If such a file is a downloaded file that is intended to be
saved to disk, then any content that might have been altered by
filtering, will be saved too, for these (probably rare) cases.</p>
-
<p>Note that versions later than 3.0.2 do NOT filter document types
reported as <span class="QUOTE">"text/plain"</span>. Prior to this,
<span class="APPLICATION">Privoxy</span> did filter this document
type.</p>
-
<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"><i class="EMPHASIS">and</i></span> b) the configuration
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
content. Source code sometimes might be mistaken for Javascript (i.e.
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>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="DOWNLOADS2" id="DOWNLOADS2">4.22. I just
downloaded a Perl script, and Privoxy altered it! Yikes, what is
wrong!</a></h3>
-
<p>Please read above.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="HOSTSFILE" id="HOSTSFILE">4.23. Should I
continue to use a <span class="QUOTE">"HOSTS"</span> 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 <tt class="FILENAME">HOSTS</tt> file, typically using <tt class=
"LITERAL">127.0.0.1</tt>, aka <tt class="LITERAL">localhost</tt>. This
effectively blocks the ad.</p>
-
<p>There is no reason to use this technique in conjunction with
<span class="APPLICATION">Privoxy</span>. <span class=
"APPLICATION">Privoxy</span> does essentially the same thing, much more
by <span class="APPLICATION">Privoxy's</span> configuration, consider
adding your list to your <tt class="FILENAME">user.action</tt>
file:</p>
-
<table border="0" bgcolor="#E0E0E0" width="100%">
<tr>
<td>
- <pre class="SCREEN">
- { +block }
+ <pre class="SCREEN"> { +block }
www.ad.example1.com
ad.example2.com
ads.galore.example.com
- etc.example.com
-</pre>
+ etc.example.com</pre>
</td>
</tr>
</table>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="SEEALSO" id="SEEALSO">4.24. Where can I find
more information about Privoxy and related issues?</a></h3>
-
<p>Other references and sites of interest to <span class=
"APPLICATION">Privoxy</span> users:</p>
-
<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>
-
<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>
-
<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>
</table>
-
<table border="0">
<tbody>
<tr>
</tr>
</tbody>
</table>
-
<table border="0">
<tbody>
<tr>
</tr>
</tbody>
</table>
-
<table border="0">
<tbody>
<tr>
</tr>
</tbody>
</table>
-
<table border="0">
<tbody>
<tr>
</tr>
</tbody>
</table>
-
<table border="0">
<tbody>
<tr>
</tr>
</tbody>
</table>
-
<table border="0">
<tbody>
<tr>
</tbody>
</table>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="MICROSUCK" id="MICROSUCK">4.25. I've noticed
that Privoxy changes <span class="QUOTE">"Microsoft"</span> to
<span class="QUOTE">"MicroSuck"</span>! 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
activated the <span class="QUOTE">"<tt class="LITERAL">fun</tt>"</span>
"QUOTE">"Advanced"</span> profile in the web-based editor. Please
upgrade.</p>
</div>
-
<div class="SECT2">
<h3 class="SECT2"><a name="VALID" id="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 class="SECT2">
<h3 class="SECT2"><a name="SURPRISE-PRIVOXY" id=
"SURPRISE-PRIVOXY">4.27. How did you manage to get Privoxy on my
computer without my consent?</a></h3>
-
<p>We didn't. We make Privoxy available for download, but we don't go
around installing it on other people's systems behind their back. If
you discover Privoxy running on your system and are sure you didn't
real Privoxy, but maybe something else that only pretends to be
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
"parental control" software based on Privoxy that came preinstalled on
certain <a href="https://sourceforge.net/p/ijbswa/bugs/813/" target=
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
involves informing the user about the changes and to make the changes
available under the same license as Privoxy itself.</p>
-
<p>If you are having trouble with a modified Privoxy version, please
try to talk to whoever made the modifications before reporting the
problem to us. Please also try to convince whoever made the
know.</p>
</div>
</div>
-
<div class="NAVFOOTER">
<hr align="left" width="100%">
-
<table summary="Footer navigation table" width="100%" border="0"
cellpadding="0" cellspacing="0">
<tr>
<td width="33%" align="left" valign="top"><a href=
"configuration.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="trouble.html"
accesskey="N">Next</a></td>
</tr>
-
<tr>
<td width="33%" align="left" valign="top">Configuration</td>
-
<td width="34%" align="center" valign="top"> </td>
-
<td width="33%" align="right" valign="top">Troubleshooting</td>
</tr>
</table>
projects / privoxy.git / blobdiff