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-><BODY
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-><HR
-ALIGN="LEFT"
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-><DIV
-CLASS="SECT1"
-><H1
-CLASS="SECT1"
-><A
-NAME="TROUBLE"
->5. Troubleshooting</A
-></H1
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN1076"
->5.1. I cannot connect to any websites. Or, I am getting
-<SPAN
-CLASS="QUOTE"
->"connection refused"</SPAN
-> message with every web page. Why?</A
-></H3
-><P
-> There are several possibilities:</P
-><P
-><P
-></P
-><UL
-><LI
-><P
-><SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is not running. Solution: verify
- that <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is installed correctly, has not crashed, and is indeed running.
- Turn on <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> logging, and look at the logs to see what they say.</P
-></LI
-><LI
-><P
->Or your browser is configured for a different port than what
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is using. Solution: verify that <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- and your browser are set to the same port (<TT
-CLASS="LITERAL"
->listen-address</TT
->).</P
-></LI
-><LI
-><P
->Or if using a forwarding rule, you have a configuration problem or a
- problem with a host in the forwarding chain. Solution: temporarily alter your
- configuration and take the forwarders out of the equation.</P
-></LI
-><LI
-><P
-> Or you have a firewall that is interfering and blocking you. Solution:
- try disabling or removing the firewall as a simple test.
- </P
-></LI
-></UL
-></P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="ERROR503"
->5.2. Why am I getting a 503 Error (WSAECONNREFUSED) on every page?</A
-></H3
-><P
-> More than likely this is a problem with your TCP/IP networking. ZoneAlarm has
- been reported to cause this symptom -- even if not running! The solution is
- to either fight the ZA configuration, or uninstall ZoneAlarm, and then find
- something better behaved in its place. Other personal firewall type products
- may cause similar type problems if not configured correctly.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="AEN1099"
->5.3. I just added a new rule, but the steenkin ad is
-still getting through. How?</A
-></H3
-><P
-> If the ad had been displayed before you added its URL, it will probably be
- held in the browser's cache for some time, so it will be displayed without
- the need for any request to the server, and <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- will not be involved. Flush the browser's caches, and then try again.</P
-><P
-> If this doesn't help, you probably have an error in the rule you
- applied. Try pasting the full URL of the offending ad into <A
-HREF="http://config.privoxy.org/show-url-info"
-TARGET="_top"
->http://config.privoxy.org/show-url-info</A
->
- and see if it really matches your new rule. Blocking ads is like blocking
- spam: a lot of tinkering is required to stay ahead of the game. And
- remember you need to block the URL of the ad in question, which may be
- entirely different from the site URL itself. Most ads are hosted on different
- servers than the main site itself. If you right-click on the ad, you should
- be able to get all the relevant information you need. Alternately, you can
- find the correct URL by looking at <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> logs
- (you may need to enable logging in the main config file if its disabled).</P
-><P
-> Below is a slightly modified real-life log snippet that originates with one
- requested URL: <TT
-CLASS="LITERAL"
->www.example.com</TT
-> (name of site was changed
- for this example, the number of requests is real). You can see in this the
- complexity of what goes into making up this one <SPAN
-CLASS="QUOTE"
->"page"</SPAN
->. There
- are eight different domains involved here, with thirty two separate URLs
- requested in all, making up all manner of images, Shockwave Flash,
- JavaScript, CSS stylesheets, scripts, and other related content. Some of this
- content is obviously <SPAN
-CLASS="QUOTE"
->"good"</SPAN
-> or <SPAN
-CLASS="QUOTE"
->"bad"</SPAN
->, but not all.
- Many of the more questionable looking requests, are going to outside domains
- that seem to be identifying themselves with suspicious looking names, making
- our job a little easier. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> has <SPAN
-CLASS="QUOTE"
->"crunched"</SPAN
-> (meaning caught
- and BLOCKED) quite a few items in this example, but perhaps missed a few as well. </P
-><P
-><TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->Request: www.example.com/
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+"http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<head>
+ <title>Troubleshooting</title>
+ <meta name="GENERATOR" content=
+ "Modular DocBook HTML Stylesheet Version 1.79">
+ <link rel="HOME" title="Privoxy Frequently Asked Questions" href=
+ "index.html">
+ <link rel="PREVIOUS" title="Miscellaneous" href="misc.html">
+ <link rel="NEXT" title=
+ "Contacting the developers, Bug Reporting and Feature Requests" href=
+ "contact.html">
+ <link rel="STYLESHEET" type="text/css" href="../p_doc.css">
+ <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">
+ <table summary="Header navigation table" width="100%" border="0"
+ cellpadding="0" cellspacing="0">
+ <tr>
+ <th colspan="3" align="center">Privoxy Frequently Asked
+ Questions</th>
+ </tr>
+ <tr>
+ <td width="10%" align="left" valign="bottom"><a href="misc.html"
+ accesskey="P">Prev</a></td>
+ <td width="80%" align="center" valign="bottom"></td>
+ <td width="10%" align="right" valign="bottom"><a href="contact.html"
+ accesskey="N">Next</a></td>
+ </tr>
+ </table>
+ <hr align="left" width="100%">
+ </div>
+ <div class="SECT1">
+ <h1 class="SECT1"><a name="TROUBLE" id="TROUBLE">5.
+ Troubleshooting</a></h1>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="REFUSED" id="REFUSED">5.1. I cannot connect
+ to any websites. Or, I am getting <span class="QUOTE">"connection
+ refused"</span> message with every web page. Why?</a></h3>
+ <p>There are several possibilities:</p>
+ <ul>
+ <li>
+ <p><span class="APPLICATION">Privoxy</span> is not running.
+ Solution: verify that <span class="APPLICATION">Privoxy</span> is
+ installed correctly, has not crashed, and is indeed running. Turn
+ on <span class="APPLICATION">Privoxy's</span> logging, and look at
+ the logs to see what they say.</p>
+ </li>
+ <li>
+ <p>Or your browser is configured for a different port than what
+ <span class="APPLICATION">Privoxy</span> is using. Solution: verify
+ that <span class="APPLICATION">Privoxy</span> and your browser are
+ set to the same port (<tt class="LITERAL">listen-address</tt>).</p>
+ </li>
+ <li>
+ <p>Or if using a forwarding rule, you have a configuration problem
+ or a problem with a host in the forwarding chain. Solution:
+ temporarily alter your configuration and take the forwarders out of
+ the equation.</p>
+ </li>
+ <li>
+ <p>Or you have a firewall that is interfering and blocking you.
+ Solution: try disabling or removing the firewall as a simple
+ test.</p>
+ </li>
+ </ul>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="ERROR503" id="ERROR503">5.2. Why am I
+ getting a 503 Error (WSAECONNREFUSED) on every page?</a></h3>
+ <p>More than likely this is a problem with your TCP/IP networking.
+ ZoneAlarm has been reported to cause this symptom -- even if not
+ running! The solution is to either fight the ZA configuration, or
+ uninstall ZoneAlarm, and then find something better behaved in its
+ place. Other personal firewall type products may cause similar type
+ problems if not configured correctly.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="FLUSHIT" id="FLUSHIT">5.3. I just added a
+ new rule, but the steenkin ad is still getting through. How?</a></h3>
+ <p>If the ad had been displayed before you added its URL, it will
+ probably be held in the browser's cache for some time, so it will be
+ displayed without the need for any request to the server, and
+ <span class="APPLICATION">Privoxy</span> will not be involved. Flush
+ the browser's caches, and then try again.</p>
+ <p>If this doesn't help, you probably have an error in the rule you
+ applied. Try pasting the full URL of the offending ad into <a href=
+ "http://config.privoxy.org/show-url-info" target=
+ "_top">http://config.privoxy.org/show-url-info</a> and see if it really
+ matches your new rule. Blocking ads is like blocking spam: a lot of
+ tinkering is required to stay ahead of the game. And remember you need
+ to block the URL of the ad in question, which may be entirely different
+ from the site URL itself. Most ads are hosted on different servers than
+ the main site itself. If you right-click on the ad, you should be able
+ to get all the relevant information you need. Alternately, you can find
+ the correct URL by looking at <span class=
+ "APPLICATION">Privoxy's</span> logs (you may need to enable logging in
+ the main config file if its disabled).</p>
+ <p>Below is a slightly modified real-life log snippet that originates
+ with one requested URL: <tt class="LITERAL">www.example.com</tt> (name
+ of site was changed for this example, the number of requests is real).
+ You can see in this the complexity of what goes into making up this one
+ <span class="QUOTE">"page"</span>. There are eight different domains
+ involved here, with thirty two separate URLs requested in all, making
+ up all manner of images, Shockwave Flash, JavaScript, CSS stylesheets,
+ scripts, and other related content. Some of this content is obviously
+ <span class="QUOTE">"good"</span> or <span class="QUOTE">"bad"</span>,
+ but not all. Many of the more questionable looking requests, are going
+ to outside domains that seem to be identifying themselves with
+ suspicious looking names, making our job a little easier. <span class=
+ "APPLICATION">Privoxy</span> has <span class="QUOTE">"crunched"</span>
+ (meaning caught and BLOCKED) quite a few items in this example, but
+ perhaps missed a few as well.</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN">Request: www.example.com/
Request: www.example.com/favicon.ico
Request: img.example.com/main.css
Request: img.example.com/sr.js
Request: www.google-analytics.com/urchin.js crunch! (Blocked)
Request: www.advertising-department.com/ats/switch.ps.php?26856 crunch! (Blocked)
Request: img.example.com/p.gif
-Request: www.popuptraffic.com/assign.php?l=example&mode=behind crunch! (Blocked)
-Request: www.popuptraffic.com/scripts/popup.php?hid=5c3cf&tmpl=PBa.tmpl crunch! (Blocked)
+Request: www.popuptraffic.com/assign.php?l=example&mode=behind crunch! (Blocked)
+Request: www.popuptraffic.com/scripts/popup.php?hid=5c3cf&tmpl=PBa.tmpl crunch! (Blocked)
Request: www.popuptraffic.com/assign.php?l=example crunch! (Blocked)
Request: www.lik-sang.com/Banners/best_sellers/best_sellers.css
Request: www.adtrak.net/adx.js crunch! (Blocked)
Request: img.example.com/mt.png
Request: img.example.com/mm.png
Request: img.example.com/mb.png
-Request: www.popuptraffic.com/scripts/popup.php?hid=a71b91fa5&tmpl=Ua.tmp crunch! (Blocked)
+Request: www.popuptraffic.com/scripts/popup.php?hid=a71b91fa5&tmpl=Ua.tmp crunch! (Blocked)
Request: www.example.com/tracker.js
Request: www.lik-sang.com/Banners/best_sellers/lsi_head.gif
-Request: www.adtrak.net/adjs.php?n=020548130&what=zone:61 crunch! (Blocked)
-Request: www.adtrak.net/adjs.php?n=463594413&what=zone:58&source=Ua crunch! (Blocked)
+Request: www.adtrak.net/adjs.php?n=020548130&what=zone:61 crunch! (Blocked)
+Request: www.adtrak.net/adjs.php?n=463594413&what=zone:58&source=Ua crunch! (Blocked)
Request: www.lik-sang.com/Banners/best_sellers/bottomani.swf
-Request: mmm.elitemediagroup.net/install.php?allowpop=no&popupmincook=0&allowsp2=1 crunch! (Blocked)
-Request: www.example.com/tracker.js?screen=1400x1050&win=962x693
-Request: www.adtrak.net/adlog.php?bannerid=1309&clientid=439&zoneid=61 crunch! (Blocked)
-Request: 66.70.21.80/scripts/click.php?hid=5c3cf599a9efd0320d26&si
+Request: mmm.elitemediagroup.net/install.php?allowpop=no&popupmincook=0&allowsp2=1 crunch! (Blocked)
+Request: www.example.com/tracker.js?screen=1400x1050&win=962x693
+Request: www.adtrak.net/adlog.php?bannerid=1309&clientid=439&zoneid=61 crunch! (Blocked)
+Request: 66.70.21.80/scripts/click.php?hid=5c3cf599a9efd0320d26&si
Request: 66.70.21.80/img/pixel.gif
-Request: www.adtrak.net/adlog.php?bannerid=1309&clientid=439&zoneid=58&source=Ua&block=86400 crunch! (Blocked)
-Request: 66.70.21.80/scripts/click.php?hid=a71b9f6504b0c5681fa5&si=Ua</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> Despite 12 out of 32 requests being blocked, the page looked, and seemed to
- behave perfectly <SPAN
-CLASS="QUOTE"
->"normal"</SPAN
-> (minus some ads, of course).</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="BADSITE"
->5.4. One of my favorite sites does not work with Privoxy.
-What can I do?</A
-></H3
-><P
-> First verify that it is indeed a <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> problem,
- by toggling off <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> through <A
-HREF="http://config.privoxy.org/toggle"
-TARGET="_top"
->http://config.privoxy.org/toggle</A
->
- (the toggle feature may need to be enabled in the main
- <TT
-CLASS="FILENAME"
->config</TT
->),
- and then shift-reloading the problem page (i.e. holding down the shift key
- while clicking reload. Alternatively, flush your browser's disk and memory
- caches).</P
-><P
-> If the problem went away, we know we have a configuration related problem.
- Now go to <A
-HREF="http://config.privoxy.org/show-url-info"
-TARGET="_top"
->http://config.privoxy.org/show-url-info</A
->
- and paste the full URL of the page in question into the prompt. See which
- actions are being applied to the URL, and which matches in which actions
- files are responsible for that. It might be helpful also to look at your logs
- for this site too, to see what else might be happening (note: logging may need
- to be enabled in the main config file). Many sites are
- complex and require a number of related pages to help present their content.
- Look at what else might be used by the page in question, and what of that
- might be <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->required</I
-></SPAN
->.
- Now, armed with this information, go to
- <A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->http://config.privoxy.org/show-status</A
->
- and select the appropriate actions files for editing. </P
-><P
-> You can now either look for a section which disables the actions that
- you suspect to cause the problem and add a pattern for your site there,
- or make up a completely new section for your site. In any case, the recommended
- way is to disable only the prime suspect, reload the problem page, and only
- if the problem persists, disable more and more actions until you have
- identified the culprit. You may or may not want to turn the other actions
- on again. Remember to flush your browser's caches in between any such changes!</P
-><P
-> Alternately, if you are comfortable with a text editor, you can accomplish
- the same thing by editing the appropriate actions file. Probably the easiest
- way to deal with such problems when editing by hand is to add your
- site to a <TT
-CLASS="LITERAL"
->{ fragile }</TT
-> section in <TT
-CLASS="FILENAME"
->user.action</TT
->,
- which is an alias that turns off most <SPAN
-CLASS="QUOTE"
->"dangerous"</SPAN
->
- actions, but is also likely to turn off more actions then needed, and thus lower
- your privacy and protection more than necessary, </P
-><P
-> Troubleshooting actions is discussed in more detail in the <A
-HREF="../user-manual/appendix.html#ACTIONSANAT"
-TARGET="_top"
->User Manual appendix,
- Troubleshooting: the Anatomy of an Action</A
->.
- There is also an <A
-HREF="../user-manual/actions-file.html#ACT-EXAMPLES"
-TARGET="_top"
->actions tutorial</A
->
- with general configuration information and examples.</P
-><P
-> As a last resort, you can always see if your browser has a setting that will
- bypass the proxy setting for selective sites. Modern browsers can do this.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="DUN"
->5.5. After installing Privoxy, I have to log in
-every time I start IE. What gives?</A
-></H3
-><P
-> This is a quirk that effects the installation of
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->, in conjunction with Internet Explorer and
- Internet Connection Sharing on Windows 2000 and Windows XP. The symptoms may
- appear to be corrupted or invalid DUN settings, or passwords.</P
-><P
-> When setting up an NT based Windows system with
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> you may find that things do not seem to be
- doing what you expect. When you set your system up you will probably have set
- up Internet Connection Sharing (ICS) with Dial up Networking (DUN) when
- logged in with administrator privileges. You will probably have made this DUN
- connection available to other accounts that you may have set-up on your
- system. E.g. Mum or Dad sets up the system and makes accounts suitably
- configured for the kids.</P
-><P
-> When setting up <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> in this environment you
- will have to alter the proxy set-up of Internet Explorer (IE) for the
- specific DUN connection on which you wish to use
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->. When you do this the ICS DUN set-up
- becomes user specific. In this instance you will see no difference if you
- change the DUN connection under the account used to set-up the connection.
- However when you do this from another user you will notice that the DUN
- connection changes to make available to "Me only". You will also find that
- you have to store the password under each different user!</P
-><P
-> The reason for this is that each user's set-up for IE is user specific. Each
- set-up DUN connection and each LAN connection in IE store the settings for
- each user individually. As such this enforces individual configurations
- rather than common ones. Hence the first time you use a DUN connection after
- re-booting your system it may not perform as you expect, and prompt you for
- the password. Just set and save the password again and all should be OK.</P
-><P
->[Thanks to Ray Griffith for this submission.]</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="FTP"
->5.6. I cannot connect to any FTP sites. Privoxy
- is blocking me.</A
-></H3
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> cannot act as a proxy for FTP traffic,
- so do not configure your browser to use <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- as an FTP proxy. The same is true for <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->any protocol other than HTTP
- or HTTPS (SSL)</I
-></SPAN
->.
- </P
-><P
-> Most browsers understand FTP as well as HTTP. If you connect to a site, with
- a URL like <TT
-CLASS="LITERAL"
->ftp://ftp.example.com</TT
->, your browser is making
- an FTP connection, and not a HTTP connection. So while your browser may
- speak FTP, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> does not, and cannot proxy
- such traffic.
- </P
-><P
-> To complicate matters, some systems may have a generic <SPAN
-CLASS="QUOTE"
->"proxy"</SPAN
->
- setting, which will enable various protocols, including
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->both</I
-></SPAN
-> HTTP and FTP proxying! So it is possible to
- accidentally enable FTP proxying in these cases. And of course, if this
- happens, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> will indeed cause problems since
- it does not know FTP. Newer version will give a sane error
- message if a FTP connection is attempted. Just disable the FTP setting
- and all will be well again.
- </P
-><P
-> Will <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> ever proxy FTP traffic? Unlikely.
- There just is not much reason, and the work to make this happen is more than
- it may seem.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="MACOSXIE"
->5.7. In Mac OS X, I can't configure Microsoft Internet Explorer to use
- Privoxy as the HTTP proxy.</A
-></H3
-><P
-> Microsoft Internet Explorer (in versions like 5.1) respects system-wide
- network settings. In order to change the HTTP proxy, open System
- Preferences, and click on the Network icon. In the settings pane that
- comes up, click on the Proxies tab. Ensure the "Web Proxy (HTTP)" checkbox
- is checked and enter <TT
-CLASS="LITERAL"
->127.0.0.1</TT
-> in the entry field.
- Enter <TT
-CLASS="LITERAL"
->8118</TT
-> in the Port field. The next time you start
- IE, it should reflect these values.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="MACOSXUNINSTALL"
->5.8. In Mac OS X, I dragged the Privoxy folder to the trash in order to
- uninstall it. Now the finder tells me I don't have sufficient privileges to
- empty the trash.</A
-></H3
-><P
-> Note: This ONLY applies to privoxy 3.0.6 and earlier.
- </P
-><P
-> Just dragging the <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> folder to the trash is
- not enough to delete it. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> supplies an
- <SPAN
-CLASS="APPLICATION"
->uninstall.command</SPAN
-> file that takes care of
- these details. Open the trash, drag the <SPAN
-CLASS="APPLICATION"
->uninstall.command</SPAN
->
- file out of the trash and double-click on it. You will be prompted for
- confirmation and the administration password.
- </P
-><P
-> The trash may still appear full after this command; emptying the trash
- from the desktop should make it appear empty again.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="MACOSXIMAGES"
->5.9. In Mac OS X Panther (10.3), images often fail to load and/or I
- experience random delays in page loading. I'm using
- <TT
-CLASS="LITERAL"
->localhost</TT
-> as my browser's proxy setting.</A
-></H3
-><P
-> We believe this is due to an IPv6-related bug in Mac OS X, but don't fully
- understand the issue yet. In any case, changing the proxy setting to
- <TT
-CLASS="LITERAL"
->127.0.0.1</TT
-> instead of <TT
-CLASS="LITERAL"
->localhost</TT
->
- works around the problem.
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="BLANKPAGE"
->5.10. I get a completely blank page at one site. <SPAN
-CLASS="QUOTE"
->"View Source"</SPAN
->
- shows only: <SPAN
-CLASS="MARKUP"
-><html><body></body></html></SPAN
->. Without
- Privoxy the page loads fine.</A
-></H3
-><P
-> Chances are that the site suffers from a bug in
- <A
-HREF="http://www.php.net/"
-TARGET="_top"
-><SPAN
-CLASS="APPLICATION"
->PHP</SPAN
-></A
->,
- which results in empty pages being sent if the client explicitly requests
- an uncompressed page, like <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> does.
- This bug has been fixed in PHP 4.2.3.
- </P
-><P
-> To find out if this is in fact the source of the problem, try adding
- the site to a <TT
-CLASS="LITERAL"
->-prevent-compression</TT
-> section in
- <TT
-CLASS="FILENAME"
->user.action</TT
->:
- </P
-><TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
-> # Make exceptions for ill-behaved sites:
- #
- {-prevent-compression}
- .example.com</PRE
-></TD
-></TR
-></TABLE
-><P
-> If that works, you may also want to report the problem to the
- site's webmasters, telling them to use zlib.output_compression
- instead of ob_gzhandler in their PHP applications (workaround)
- or upgrade to PHP 4.2.3 or later (fix).
- </P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="NOHOSTNAME"
->5.11. My logs show many <SPAN
-CLASS="QUOTE"
->"Unable to get my own hostname"</SPAN
-> lines.
-Why?</A
-></H3
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> tries to get the hostname of the system
- its running on from the IP address of the system interface it is bound to
- (from the <TT
-CLASS="FILENAME"
->config</TT
-> file
- <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->listen-address</I
-></SPAN
-> setting). If the system cannot supply
- this information, <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> logs this condition. </P
-><P
-> Typically, this would be considered a minor system configuration error. It is
- not a fatal error to <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> however, but may
- result in a much slower response from <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on
- some platforms due to DNS timeouts.</P
-><P
-> This can be caused by a problem with the local <TT
-CLASS="FILENAME"
->hosts</TT
->
- file. If this file has been changed from the original, try reverting it to
- see if that helps. Make sure whatever name(s) are used for the local system,
- that they resolve both ways.</P
-><P
-> You should also be able to work around the problem with the
- <A
-HREF="../user-manual/config.html#HOSTNAME"
-TARGET="_top"
->hostname option</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="INUSE"
->5.12. When I try to launch Privoxy, I get an
-error message <SPAN
-CLASS="QUOTE"
->"port 8118 is already in use"</SPAN
-> (or similar wording).
-Why?</A
-></H3
-><P
-> Port 8118 is <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> default TCP
- <SPAN
-CLASS="QUOTE"
->"listening"</SPAN
-> port. Typically this message would mean that there
- is already one instance of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> running, and
- your system is actually trying to start a second
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> on the same port, which will not work.
- (You can have multiple instances but they must be assigned different ports.)
- How and why this might happen varies from platform to platform, but you need
- to check your installation and start-up procedures.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="DEMORONIZER"
->5.13. Pages with UTF-8 fonts are garbled.</A
-></H3
-><P
-> This is caused by the <SPAN
-CLASS="QUOTE"
->"demoronizer"</SPAN
-> filter. You should either
- upgrade <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->, or at least upgrade to the most
- recent <TT
-CLASS="FILENAME"
->default.action</TT
-> file available from <A
-HREF="http://sourceforge.net/project/showfiles.php?group_id=11118"
-TARGET="_top"
->SourceForge</A
->.
- Or you can simply disable the demoronizer filter.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="DEMORONIZER2"
->5.14. Why are binary files (such as images) corrupted when Privoxy
- is used?</A
-></H3
-><P
-> This may also be caused by the <SPAN
-CLASS="QUOTE"
->"demoronizer"</SPAN
-> filter,
- in conjunction with a web server that is misreporting the content type. Binary
- files are exempted from <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> filtering
- (unless the web server by mistake says the file is something else). Either
- upgrade <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->, or go to the most recent
- <TT
-CLASS="FILENAME"
->default.action</TT
-> file available from <A
-HREF="http://sourceforge.net/project/showfiles.php?group_id=11118"
-TARGET="_top"
->SourceForge</A
->.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="DEMORONIZER3"
->5.15. What is the <SPAN
-CLASS="QUOTE"
->"demoronizer"</SPAN
-> and why is it there?</A
-></H3
-><P
-> The original demoronizer was a Perl script that cleaned up HTML pages which
- were created with certain Microsoft products. MS has used proprietary extensions
- to standardized font encodings (ISO 8859-1), which has caused problems for pages
- that are viewed with non-Microsoft products (and are expecting to see a
- standard set of fonts). The demoronizer corrected these errors so the pages
- displayed correctly. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> borrowed from this
- script, introducing a filter based on the original demoronizer, which in turn could
- correct these errors on the fly. </P
-><P
-> But this is only needed in some situations, and will cause serious problems in some
- other situations.</P
-><P
-> If you are using Microsoft products, you do not need it. If you need to view
- pages with UTF-8 characters (such as Cyrillic or Chinese), then it will
- cause corruption of the fonts, and thus <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->should not be on</I
-></SPAN
->.</P
-><P
-> On the other hand, if you use non-Microsoft products, and you occasionally
- notice weird characters on pages, you might want to try it.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="WINDOWOPEN"
->5.16. Why do I keep seeing <SPAN
-CLASS="QUOTE"
->"PrivoxyWindowOpen()"</SPAN
-> in raw source code?</A
-></H3
-><P
-> <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is attempting to disable malicious
- <A
-HREF="http://en.wikipedia.org/wiki/Javascript"
-TARGET="_top"
->Javascript</A
->
- in this case, with the <TT
-CLASS="LITERAL"
->unsolicited-popups</TT
->
- filter. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> cannot tell very well
- <SPAN
-CLASS="QUOTE"
->"good"</SPAN
-> code snippets from <SPAN
-CLASS="QUOTE"
->"bad"</SPAN
-> code snippets.</P
-><P
-> If you see this in HTML source, and the page displays without problems, then
- this is good, and likely some pop-up window was disabled. If you see this
- where it is causing a problem, such as a downloaded program source code file,
- then you should set an exception for this site or page such that the
- integrity of the page stays in tact by disabling all filtering.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="DNSERRORS"
->5.17. I am getting too many DNS errors like <SPAN
-CLASS="QUOTE"
->"404 No Such Domain"</SPAN
->. Why
- can't Privoxy do this better?</A
-></H3
-><P
-> There are potentially several factors here. First of all, the DNS resolution
- is done by the underlying operating system -- not
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> itself. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- merely initiates the process and hands it off, and then later reports
- whatever the outcome was and tries to give a coherent message if there seems
- to be a problem. In some cases, this might otherwise be mitigated by the
- browser itself which might try some work-arounds and alternate approaches (e.g
- adding <SPAN
-CLASS="QUOTE"
->"www."</SPAN
-> to the URL).</P
-><P
-> In other cases, if <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> is being chained
- with another proxy, this could complicate the issue, and cause undue
- delays and timeouts. In the case of a <SPAN
-CLASS="QUOTE"
->"socks4a"</SPAN
-> proxy, the socks
- server handles all the DNS. <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> would just be
- the <SPAN
-CLASS="QUOTE"
->"messenger"</SPAN
-> which is reporting whatever problem occurred
- downstream, and not the root cause of the error.</P
-><P
-> In any case, versions newer than 3.0.3 include various improvements to help
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> better handle these cases.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="ALLCPU"
->5.18. At one site Privoxy just hangs, and starts taking
- all CPU. Why is this?</A
-></H3
-><P
-> This is probably a manifestation of the <SPAN
-CLASS="QUOTE"
->"100% cpu"</SPAN
-> problem that
- occurs on pages containing many (thousands upon thousands) of blank lines. The blank lines
- are in the raw HTML source of the page, and the browser just ignores them. But the
- pattern matching in <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> page filtering
- mechanism is trying to match against absurdly long strings and this becomes
- very CPU-intensive, taking a long, long time to complete.</P
-><P
-> Until a better solution comes along, disable filtering on these pages,
- particularly the <TT
-CLASS="LITERAL"
->js-annoyances</TT
-> and
- <TT
-CLASS="LITERAL"
->unsolicited-popups</TT
-> filters. If you run into this problem
- with a recent <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> version, please send a problem report.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="SLOWCRAWL"
->5.19. I just installed Privoxy, and all my
-browsing has slowed to a crawl. What gives?</A
-></H3
-><P
-> This should not happen, and for the overwhelming number of users world-wide,
- it does not happen. I would suspect some inadvertent interaction of software
- components such as anti-virus software, spyware protectors, personal
- firewalls or similar components. Try disabling (or uninstalling) these one
- at a time and see if that helps. Either way, if you are using a
- recent <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> version, please report the problem.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="PREVENTCOMP"
->5.20. Why do my filters work on some sites but not on others?</A
-></H3
-><P
-> It's probably due to compression. It is a common practice for web servers to
- send their content <SPAN
-CLASS="QUOTE"
->"compressed"</SPAN
-> in order to speed things up, and
- then let the browser <SPAN
-CLASS="QUOTE"
->"uncompress"</SPAN
-> them. When compiled with zlib support
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> can decompress content before filtering, otherwise you may want to enable
-<A
-HREF="../user-manual/actions-file.html#PREVENT-COMPRESSION"
-TARGET="_top"
->prevent-compression</A
->.</P
-><P
-> As of <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> 3.0.9, zlib support is enabled in the default builds.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="SSL-WARNINGS"
->5.21. On some HTTPS sites my browser warns me about unauthenticated content,
- the URL bar doesn't get highlighted and the lock symbol appears to be broken.
- What's going on?</A
-></H3
-><P
-> Probably the browser is requesting ads through HTTPS and <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->
- is blocking the requests. Privoxy's error messages are delivered
- unencrypted and while it's obvious for the browser that the HTTPS
- request is already blocked by the proxy, some warn about unauthenticated
- content anyway.</P
-><P
-> To work around the problem you can redirect those requests to an invalid
- local address instead of blocking them. While the redirects aren't
- encrypted either, many browsers don't care. They simply follow the
- redirect, fail to reach a server and display an error message instead
- of the ad.</P
-><P
-> To do that, enable logging to figure out which requests get blocked by
- <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> and add the hosts (no path patterns) to a section like this:</P
-><P
-><TABLE
-BORDER="0"
-BGCOLOR="#E0E0E0"
-WIDTH="100%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->{+redirect{http://127.0.0.1:0/} -block -limit-connect}
-.ivwbox.de:443/</PRE
-></TD
-></TR
-></TABLE
-></P
-><P
-> Additionally you have to configure your browser to contact
- <SPAN
-CLASS="QUOTE"
->"127.0.0.1:0"</SPAN
-> directly (instead of through <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->).</P
-><P
-> To add a proxy exception in <SPAN
-CLASS="APPLICATION"
->Mozilla Firefox</SPAN
->
- open the <SPAN
-CLASS="QUOTE"
->"Preferences"</SPAN
->, click the <SPAN
-CLASS="QUOTE"
->"Settings"</SPAN
->
- button located on the <SPAN
-CLASS="QUOTE"
->"Network"</SPAN
-> tab in the <SPAN
-CLASS="QUOTE"
->"Advanced"</SPAN
->
- section, and add <SPAN
-CLASS="QUOTE"
->"127.0.0.1:0"</SPAN
-> in the <SPAN
-CLASS="QUOTE"
->"No Proxy for:"</SPAN
->
- field.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="SE-LINUX"
->5.22. I get selinux error messages. How can I fix this?</A
-></H3
-><P
-> Please report the problem to the creator of your selinux policies.</P
-><P
-> The problem is that some selinux policy writers aren't familiar
- with the application they are trying to <SPAN
-CLASS="QUOTE"
->"secure"</SPAN
-> and
- thus create policies that make no sense.</P
-><P
-> In <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
-> case the problem usually
- is that the policy only allows outgoing connections for certain
- destination ports (e.g. 80 and 443). While this may cover the
- standard ports, websites occasionally use other ports as well.
- This isn't a security problem and therefore <SPAN
-CLASS="APPLICATION"
->Privoxy's</SPAN
->
- default configuration doesn't block these requests.</P
-><P
-> If you really want to block these ports (and don't be able
- to load websites that don't use standard ports), you should
- configure Privoxy to block these ports as well, so it doesn't
- trigger the selinux warnings.</P
-></DIV
-><DIV
-CLASS="SECT2"
-><H3
-CLASS="SECT2"
-><A
-NAME="GENTOO-RICERS"
->5.23. I compiled <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> with Gentoo's portage and it appears to be very slow. Why?</A
-></H3
-><P
-> Probably you unintentionally compiled <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> without threading support
- in which case requests have to be serialized and only one can be served
- at the same time.</P
-><P
-> Check your <SPAN
-CLASS="QUOTE"
->"USE"</SPAN
-> flags and make sure they include
- <SPAN
-CLASS="QUOTE"
->"threads"</SPAN
->. If they don't, add the flag and rebuild <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
->.</P
-><P
-> If you compiled <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> with threading support (on POSIX-based systems),
- the <SPAN
-CLASS="QUOTE"
->"Conditional #defines"</SPAN
-> section on <A
-HREF="http://config.privoxy.org/show-status"
-TARGET="_top"
->http://config.privoxy.org/show-status</A
->
- will list <SPAN
-CLASS="QUOTE"
->"FEATURE_PTHREAD"</SPAN
-> as <SPAN
-CLASS="QUOTE"
->"enabled"</SPAN
->. </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="misc.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="contact.html"
-ACCESSKEY="N"
->Next</A
-></TD
-></TR
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
->Miscellaneous</TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-> </TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
->Contacting the developers, Bug Reporting and Feature Requests</TD
-></TR
-></TABLE
-></DIV
-></BODY
-></HTML
->
\ No newline at end of file
+Request: www.adtrak.net/adlog.php?bannerid=1309&clientid=439&zoneid=58&source=Ua&block=86400 crunch! (Blocked)
+Request: 66.70.21.80/scripts/click.php?hid=a71b9f6504b0c5681fa5&si=Ua</pre>
+ </td>
+ </tr>
+ </table>
+ <p>Despite 12 out of 32 requests being blocked, the page looked, and
+ seemed to behave perfectly <span class="QUOTE">"normal"</span> (minus
+ some ads, of course).</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="BADSITE" id="BADSITE">5.4. One of my
+ favorite sites does not work with Privoxy. What can I do?</a></h3>
+ <p>First verify that it is indeed a <span class=
+ "APPLICATION">Privoxy</span> problem, by toggling off <span class=
+ "APPLICATION">Privoxy</span> through <a href=
+ "http://config.privoxy.org/toggle" target=
+ "_top">http://config.privoxy.org/toggle</a> (the toggle feature may
+ need to be enabled in the main <tt class="FILENAME">config</tt>), and
+ then shift-reloading the problem page (i.e. holding down the shift key
+ while clicking reload. Alternatively, flush your browser's disk and
+ memory caches).</p>
+ <p>If the problem went away, we know we have a configuration related
+ problem. Now go to <a href="http://config.privoxy.org/show-url-info"
+ target="_top">http://config.privoxy.org/show-url-info</a> and paste the
+ full URL of the page in question into the prompt. See which actions are
+ being applied to the URL, and which matches in which actions files are
+ responsible for that. It might be helpful also to look at your logs for
+ this site too, to see what else might be happening (note: logging may
+ need to be enabled in the main config file). Many sites are complex and
+ require a number of related pages to help present their content. Look
+ at what else might be used by the page in question, and what of that
+ might be <span class="emphasis"><i class=
+ "EMPHASIS">required</i></span>. Now, armed with this information, go to
+ <a href="http://config.privoxy.org/show-status" target=
+ "_top">http://config.privoxy.org/show-status</a> and select the
+ appropriate actions files for editing.</p>
+ <p>You can now either look for a section which disables the actions
+ that you suspect to cause the problem and add a pattern for your site
+ there, or make up a completely new section for your site. In any case,
+ the recommended way is to disable only the prime suspect, reload the
+ problem page, and only if the problem persists, disable more and more
+ actions until you have identified the culprit. You may or may not want
+ to turn the other actions on again. Remember to flush your browser's
+ caches in between any such changes!</p>
+ <p>Alternately, if you are comfortable with a text editor, you can
+ accomplish the same thing by editing the appropriate actions file.
+ Probably the easiest way to deal with such problems when editing by
+ hand is to add your site to a <tt class="LITERAL">{ fragile }</tt>
+ section in <tt class="FILENAME">user.action</tt>, which is an alias
+ that turns off most <span class="QUOTE">"dangerous"</span> actions, but
+ is also likely to turn off more actions then needed, and thus lower
+ your privacy and protection more than necessary,</p>
+ <p>Troubleshooting actions is discussed in more detail in the <a href=
+ "../user-manual/appendix.html#ACTIONSANAT" target="_top">User Manual
+ appendix, Troubleshooting: the Anatomy of an Action</a>. There is also
+ an <a href="../user-manual/actions-file.html#ACT-EXAMPLES" target=
+ "_top">actions tutorial</a> with general configuration information and
+ examples.</p>
+ <p>As a last resort, you can always see if your browser has a setting
+ that will bypass the proxy setting for selective sites. Modern browsers
+ can do this.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DUN" id="DUN">5.5. After installing Privoxy,
+ I have to log in every time I start IE. What gives?</a></h3>
+ <p>This is a quirk that affects the installation of <span class=
+ "APPLICATION">Privoxy</span>, in conjunction with Internet Explorer and
+ Internet Connection Sharing on Windows 2000 and Windows XP. The
+ symptoms may appear to be corrupted or invalid DUN settings, or
+ passwords.</p>
+ <p>When setting up an NT based Windows system with <span class=
+ "APPLICATION">Privoxy</span> you may find that things do not seem to be
+ doing what you expect. When you set your system up you will probably
+ have set up Internet Connection Sharing (ICS) with Dial up Networking
+ (DUN) when logged in with administrator privileges. You will probably
+ have made this DUN connection available to other accounts that you may
+ have set-up on your system. E.g. Mum or Dad sets up the system and
+ makes accounts suitably configured for the kids.</p>
+ <p>When setting up <span class="APPLICATION">Privoxy</span> in this
+ environment you will have to alter the proxy set-up of Internet
+ Explorer (IE) for the specific DUN connection on which you wish to use
+ <span class="APPLICATION">Privoxy</span>. When you do this the ICS DUN
+ set-up becomes user specific. In this instance you will see no
+ difference if you change the DUN connection under the account used to
+ set-up the connection. However when you do this from another user you
+ will notice that the DUN connection changes to make available to "Me
+ only". You will also find that you have to store the password under
+ each different user!</p>
+ <p>The reason for this is that each user's set-up for IE is user
+ specific. Each set-up DUN connection and each LAN connection in IE
+ store the settings for each user individually. As such this enforces
+ individual configurations rather than common ones. Hence the first time
+ you use a DUN connection after re-booting your system it may not
+ perform as you expect, and prompt you for the password. Just set and
+ save the password again and all should be OK.</p>
+ <p>[Thanks to Ray Griffith for this submission.]</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="FTP" id="FTP">5.6. I cannot connect to any
+ FTP sites. Privoxy is blocking me.</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> cannot act as a proxy for
+ FTP traffic, so do not configure your browser to use <span class=
+ "APPLICATION">Privoxy</span> as an FTP proxy. The same is true for
+ <span class="emphasis"><i class="EMPHASIS">any protocol other than HTTP
+ or HTTPS (SSL)</i></span>.</p>
+ <p>Most browsers understand FTP as well as HTTP. If you connect to a
+ site, with a URL like <tt class="LITERAL">ftp://ftp.example.com</tt>,
+ your browser is making an FTP connection, and not a HTTP connection. So
+ while your browser may speak FTP, <span class=
+ "APPLICATION">Privoxy</span> does not, and cannot proxy such
+ traffic.</p>
+ <p>To complicate matters, some systems may have a generic <span class=
+ "QUOTE">"proxy"</span> setting, which will enable various protocols,
+ including <span class="emphasis"><i class="EMPHASIS">both</i></span>
+ HTTP and FTP proxying! So it is possible to accidentally enable FTP
+ proxying in these cases. And of course, if this happens, <span class=
+ "APPLICATION">Privoxy</span> will indeed cause problems since it does
+ not know FTP. Newer version will give a sane error message if a FTP
+ connection is attempted. Just disable the FTP setting and all will be
+ well again.</p>
+ <p>Will <span class="APPLICATION">Privoxy</span> ever proxy FTP
+ traffic? Unlikely. There just is not much reason, and the work to make
+ this happen is more than it may seem.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="MACOSXIE" id="MACOSXIE">5.7. In Mac OS X, I
+ can't configure Microsoft Internet Explorer to use Privoxy as the HTTP
+ proxy.</a></h3>
+ <p>Microsoft Internet Explorer (in versions like 5.1) respects
+ system-wide network settings. In order to change the HTTP proxy, open
+ System Preferences, and click on the Network icon. In the settings pane
+ that comes up, click on the Proxies tab. Ensure the "Web Proxy (HTTP)"
+ checkbox is checked and enter <tt class="LITERAL">127.0.0.1</tt> in the
+ entry field. Enter <tt class="LITERAL">8118</tt> in the Port field. The
+ next time you start IE, it should reflect these values.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="MACOSXUNINSTALL" id="MACOSXUNINSTALL">5.8.
+ In Mac OS X, I dragged the Privoxy folder to the trash in order to
+ uninstall it. Now the finder tells me I don't have sufficient
+ privileges to empty the trash.</a></h3>
+ <p>Note: This ONLY applies to privoxy 3.0.6 and earlier.</p>
+ <p>Just dragging the <span class="APPLICATION">Privoxy</span> folder to
+ the trash is not enough to delete it. <span class=
+ "APPLICATION">Privoxy</span> supplies an <span class=
+ "APPLICATION">uninstall.command</span> file that takes care of these
+ details. Open the trash, drag the <span class=
+ "APPLICATION">uninstall.command</span> file out of the trash and
+ double-click on it. You will be prompted for confirmation and the
+ administration password.</p>
+ <p>The trash may still appear full after this command; emptying the
+ trash from the desktop should make it appear empty again.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="MACOSXIMAGES" id="MACOSXIMAGES">5.9. In Mac
+ OS X Panther (10.3), images often fail to load and/or I experience
+ random delays in page loading. I'm using <tt class=
+ "LITERAL">localhost</tt> as my browser's proxy setting.</a></h3>
+ <p>We believe this is due to an IPv6-related bug in Mac OS X, but don't
+ fully understand the issue yet. In any case, changing the proxy setting
+ to <tt class="LITERAL">127.0.0.1</tt> instead of <tt class=
+ "LITERAL">localhost</tt> works around the problem.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="MACOSXACCOUNTDELETION" id=
+ "MACOSXACCOUNTDELETION">5.10. I just upgraded to Mac OS X 10.9
+ (Mavericks) and now <span class="APPLICATION">Privoxy</span> has
+ stopped working.</a></h3>
+ <p>The upgrade process to Mac OS X Mavericks (10.9) from an earlier
+ version of OS X deletes all user accounts that are either not part of
+ OS X itself or are not interactive user accounts (ones you log in
+ with). Since, for the sake of security, <span class=
+ "APPLICATION">Privoxy</span> runs as a non-privileged user that is
+ created by its installer (_privoxy), it can no longer start up once
+ that account gets deleted. The solution is to perform a complete
+ uninstall using the supplied <span class=
+ "APPLICATION">uninstall.command</span> script (either back up your
+ configuration files or select to not have the uninstaller remove them
+ when it prompts you) and then reinstall <span class=
+ "APPLICATION">Privoxy</span> using the installer package and merge in
+ your configuration.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="NOHOSTNAME" id="NOHOSTNAME">5.11. My logs
+ show many <span class="QUOTE">"Unable to get my own hostname"</span>
+ lines. Why?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> tries to get the hostname
+ of the system its running on from the IP address of the system
+ interface it is bound to (from the <tt class="FILENAME">config</tt>
+ file <span class="emphasis"><i class=
+ "EMPHASIS">listen-address</i></span> setting). If the system cannot
+ supply this information, <span class="APPLICATION">Privoxy</span> logs
+ this condition.</p>
+ <p>Typically, this would be considered a minor system configuration
+ error. It is not a fatal error to <span class=
+ "APPLICATION">Privoxy</span> however, but may result in a much slower
+ response from <span class="APPLICATION">Privoxy</span> on some
+ platforms due to DNS timeouts.</p>
+ <p>This can be caused by a problem with the local <tt class=
+ "FILENAME">hosts</tt> file. If this file has been changed from the
+ original, try reverting it to see if that helps. Make sure whatever
+ name(s) are used for the local system, that they resolve both ways.</p>
+ <p>You should also be able to work around the problem with the <a href=
+ "../user-manual/config.html#HOSTNAME" target="_top">hostname
+ option</a>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="INUSE" id="INUSE">5.12. When I try to launch
+ Privoxy, I get an error message <span class="QUOTE">"port 8118 is
+ already in use"</span> (or similar wording). Why?</a></h3>
+ <p>Port 8118 is <span class="APPLICATION">Privoxy's</span> default TCP
+ <span class="QUOTE">"listening"</span> port. Typically this message
+ would mean that there is already one instance of <span class=
+ "APPLICATION">Privoxy</span> running, and your system is actually
+ trying to start a second <span class="APPLICATION">Privoxy</span> on
+ the same port, which will not work. (You can have multiple instances
+ but they must be assigned different ports.) How and why this might
+ happen varies from platform to platform, but you need to check your
+ installation and start-up procedures.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DEMORONIZER" id="DEMORONIZER">5.13. Pages
+ with UTF-8 fonts are garbled.</a></h3>
+ <p>This may be the result of an overly aggressive filter. The filters
+ that are enabled in the default configuration aren't expected to cause
+ problems like this. If you enabled the <span class=
+ "QUOTE">"demoronizer"</span> filter, please try temporarily disabling
+ it.</p>
+ <p>If that doesn't help, temporarily disable all filters to see if
+ another filter could be the culprit. If the problem disappears, enable
+ the filters one by one, until the problem reappears and the offending
+ filter is found.</p>
+ <p>Once the problem-causing filter is known, it can be fixed or
+ disabled.</p>
+ <p>Upgrading <span class="APPLICATION">Privoxy</span>, or going to the
+ most recent <tt class="FILENAME">default.action</tt> file available
+ from <a href=
+ "https://sourceforge.net/project/showfiles.php?group_id=11118" target=
+ "_top">SourceForge</a> might be worth a try, too.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DEMORONIZER2" id="DEMORONIZER2">5.14. Why
+ are binary files (such as images) corrupted when Privoxy is
+ used?</a></h3>
+ <p>This may also be caused by an (<a href=
+ "trouble.html#DEMORONIZER">overly aggressive filter</a> in conjunction
+ with a web server that is misreporting the content type. By default
+ binary files are exempted from <span class=
+ "APPLICATION">Privoxy's</span> filtering (unless the web server by
+ mistake says the file is something else).</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DEMORONIZER3" id="DEMORONIZER3">5.15. What
+ is the <span class="QUOTE">"demoronizer"</span> and why is it
+ there?</a></h3>
+ <p>The original demoronizer was a Perl script that cleaned up HTML
+ pages which were created with certain Microsoft products. MS has used
+ proprietary extensions to standardized font encodings (ISO 8859-1),
+ which has caused problems for pages that are viewed with non-Microsoft
+ products (and are expecting to see a standard set of fonts). The
+ demoronizer corrected these errors so the pages displayed correctly.
+ <span class="APPLICATION">Privoxy</span> borrowed from this script,
+ introducing a filter based on the original demoronizer, which in turn
+ could correct these errors on the fly.</p>
+ <p>But this is only needed in some situations, and will cause serious
+ problems in some other situations.</p>
+ <p>If you are using Microsoft products, you do not need it. If you need
+ to view pages with UTF-8 characters (such as Cyrillic or Chinese), then
+ it will cause corruption of the fonts, and thus <span class=
+ "emphasis"><i class="EMPHASIS">should not be on</i></span>.</p>
+ <p>On the other hand, if you use non-Microsoft products, and you
+ occasionally notice weird characters on pages, you might want to try
+ it.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="WINDOWOPEN" id="WINDOWOPEN">5.16. Why do I
+ keep seeing <span class="QUOTE">"PrivoxyWindowOpen()"</span> in raw
+ source code?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> is attempting to disable
+ malicious <a href="http://en.wikipedia.org/wiki/Javascript" target=
+ "_top">Javascript</a> in this case, with the <tt class=
+ "LITERAL">unsolicited-popups</tt> filter. <span class=
+ "APPLICATION">Privoxy</span> cannot tell very well <span class=
+ "QUOTE">"good"</span> code snippets from <span class=
+ "QUOTE">"bad"</span> code snippets.</p>
+ <p>If you see this in HTML source, and the page displays without
+ problems, then this is good, and likely some pop-up window was
+ disabled. If you see this where it is causing a problem, such as a
+ downloaded program source code file, then you should set an exception
+ for this site or page such that the integrity of the page stays in tact
+ by disabling all filtering.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="DNSERRORS" id="DNSERRORS">5.17. I am getting
+ too many DNS errors like <span class="QUOTE">"404 No Such
+ Domain"</span>. Why can't Privoxy do this better?</a></h3>
+ <p>There are potentially several factors here. First of all, the DNS
+ resolution is done by the underlying operating system -- not
+ <span class="APPLICATION">Privoxy</span> itself. <span class=
+ "APPLICATION">Privoxy</span> merely initiates the process and hands it
+ off, and then later reports whatever the outcome was and tries to give
+ a coherent message if there seems to be a problem. In some cases, this
+ might otherwise be mitigated by the browser itself which might try some
+ work-arounds and alternate approaches (e.g adding <span class=
+ "QUOTE">"www."</span> to the URL).</p>
+ <p>In other cases, if <span class="APPLICATION">Privoxy</span> is being
+ chained with another proxy, this could complicate the issue, and cause
+ undue delays and timeouts. In the case of a <span class=
+ "QUOTE">"socks4a"</span> proxy, the socks server handles all the DNS.
+ <span class="APPLICATION">Privoxy</span> would just be the <span class=
+ "QUOTE">"messenger"</span> which is reporting whatever problem occurred
+ downstream, and not the root cause of the error.</p>
+ <p>In any case, versions newer than 3.0.3 include various improvements
+ to help <span class="APPLICATION">Privoxy</span> better handle these
+ cases.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="ALLCPU" id="ALLCPU">5.18. At one site
+ Privoxy just hangs, and starts taking all CPU. Why is this?</a></h3>
+ <p>This is probably a manifestation of the <span class="QUOTE">"100%
+ cpu"</span> problem that occurs on pages containing many (thousands
+ upon thousands) of blank lines. The blank lines are in the raw HTML
+ source of the page, and the browser just ignores them. But the pattern
+ matching in <span class="APPLICATION">Privoxy's</span> page filtering
+ mechanism is trying to match against absurdly long strings and this
+ becomes very CPU-intensive, taking a long, long time to complete.</p>
+ <p>Until a better solution comes along, disable filtering on these
+ pages, particularly the <tt class="LITERAL">js-annoyances</tt> and
+ <tt class="LITERAL">unsolicited-popups</tt> filters. If you run into
+ this problem with a recent <span class="APPLICATION">Privoxy</span>
+ version, please send a problem report.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="SLOWCRAWL" id="SLOWCRAWL">5.19. I just
+ installed Privoxy, and all my browsing has slowed to a crawl. What
+ gives?</a></h3>
+ <p>This should not happen, and for the overwhelming number of users
+ world-wide, it does not happen. I would suspect some inadvertent
+ interaction of software components such as anti-virus software, spyware
+ protectors, personal firewalls or similar components. Try disabling (or
+ uninstalling) these one at a time and see if that helps. Either way, if
+ you are using a recent <span class="APPLICATION">Privoxy</span>
+ version, please report the problem.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="PREVENTCOMP" id="PREVENTCOMP">5.20. Why do
+ my filters work on some sites but not on others?</a></h3>
+ <p>It's probably due to compression. It is a common practice for web
+ servers to send their content <span class="QUOTE">"compressed"</span>
+ in order to speed things up, and then let the browser <span class=
+ "QUOTE">"uncompress"</span> them. When compiled with zlib support
+ <span class="APPLICATION">Privoxy</span> can decompress content before
+ filtering, otherwise you may want to enable <a href=
+ "../user-manual/actions-file.html#PREVENT-COMPRESSION" target=
+ "_top">prevent-compression</a>.</p>
+ <p>As of <span class="APPLICATION">Privoxy</span> 3.0.9, zlib support
+ is enabled in the default builds.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="SSL-WARNINGS" id="SSL-WARNINGS">5.21. On
+ some HTTPS sites my browser warns me about unauthenticated content, the
+ URL bar doesn't get highlighted and the lock symbol appears to be
+ broken. What's going on?</a></h3>
+ <p>Probably the browser is requesting ads through HTTPS and
+ <span class="APPLICATION">Privoxy</span> is blocking the requests.
+ Privoxy's error messages are delivered unencrypted and while it's
+ obvious for the browser that the HTTPS request is already blocked by
+ the proxy, some warn about unauthenticated content anyway.</p>
+ <p>To work around the problem you can redirect those requests to an
+ invalid local address instead of blocking them. While the redirects
+ aren't encrypted either, many browsers don't care. They simply follow
+ the redirect, fail to reach a server and display an error message
+ instead of the ad.</p>
+ <p>To do that, enable logging to figure out which requests get blocked
+ by <span class="APPLICATION">Privoxy</span> and add the hosts (no path
+ patterns) to a section like this:</p>
+ <table border="0" bgcolor="#E0E0E0" width="100%">
+ <tr>
+ <td>
+ <pre class="SCREEN">
+ {+redirect{http://127.0.0.1:0/} -block -limit-connect}
+.ivwbox.de:443/</pre>
+ </td>
+ </tr>
+ </table>
+ <p>Additionally you have to configure your browser to contact
+ <span class="QUOTE">"127.0.0.1:0"</span> directly (instead of through
+ <span class="APPLICATION">Privoxy</span>).</p>
+ <p>To add a proxy exception in <span class="APPLICATION">Mozilla
+ Firefox</span> open the <span class="QUOTE">"Preferences"</span>, click
+ the <span class="QUOTE">"Settings"</span> button located on the
+ <span class="QUOTE">"Network"</span> tab in the <span class=
+ "QUOTE">"Advanced"</span> section, and add <span class=
+ "QUOTE">"127.0.0.1:0"</span> in the <span class="QUOTE">"No Proxy
+ for:"</span> field.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="SE-LINUX" id="SE-LINUX">5.22. I get selinux
+ error messages. How can I fix this?</a></h3>
+ <p>Please report the problem to the creator of your selinux
+ policies.</p>
+ <p>The problem is that some selinux policy writers aren't familiar with
+ the application they are trying to <span class="QUOTE">"secure"</span>
+ and thus create policies that make no sense.</p>
+ <p>In <span class="APPLICATION">Privoxy's</span> case the problem
+ usually is that the policy only allows outgoing connections for certain
+ destination ports (e.g. 80 and 443). While this may cover the standard
+ ports, websites occasionally use other ports as well. This isn't a
+ security problem and therefore <span class=
+ "APPLICATION">Privoxy's</span> default configuration doesn't block
+ these requests.</p>
+ <p>If you really want to block these ports (and don't be able to load
+ websites that don't use standard ports), you should configure Privoxy
+ to block these ports as well, so it doesn't trigger the selinux
+ warnings.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="GENTOO-RICERS" id="GENTOO-RICERS">5.23. I
+ compiled <span class="APPLICATION">Privoxy</span> with Gentoo's portage
+ and it appears to be very slow. Why?</a></h3>
+ <p>Probably you unintentionally compiled <span class=
+ "APPLICATION">Privoxy</span> without threading support in which case
+ requests have to be serialized and only one can be served at the same
+ time.</p>
+ <p>Check your <span class="QUOTE">"USE"</span> flags and make sure they
+ include <span class="QUOTE">"threads"</span>. If they don't, add the
+ flag and rebuild <span class="APPLICATION">Privoxy</span>.</p>
+ <p>If you compiled <span class="APPLICATION">Privoxy</span> with
+ threading support (on POSIX-based systems), the <span class=
+ "QUOTE">"Conditional #defines"</span> section on <a href=
+ "http://config.privoxy.org/show-status" target=
+ "_top">http://config.privoxy.org/show-status</a> will list <span class=
+ "QUOTE">"FEATURE_PTHREAD"</span> as <span class=
+ "QUOTE">"enabled"</span>.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="TAINTED-SOCKETS" id="TAINTED-SOCKETS">5.24.
+ What are tainted sockets and how do I prevent them?</a></h3>
+ <p><span class="APPLICATION">Privoxy</span> marks sockets as tainted
+ when it can't use them to serve additional requests. This does not
+ necessarily mean that something went wrong and information about
+ tainted sockets is only logged if connection debugging is enabled
+ (debug 2).</p>
+ <p>For example server sockets that were used for CONNECT requests
+ (which are used to tunnel https:// requests) are considered tainted
+ once the client closed its connection to <span class=
+ "APPLICATION">Privoxy</span>. Technically <span class=
+ "APPLICATION">Privoxy</span> could keep the connection to the server
+ open, but the server would not accept requests that do not belong to
+ the previous TLS/SSL session (and the client may even have terminated
+ the session).</p>
+ <p>Server sockets are also marked tainted when a client requests a
+ resource, but closes the connection before <span class=
+ "APPLICATION">Privoxy</span> has completely received (and forwarded)
+ the resource to the client. In this case the server would (probably)
+ accept additional requests, but <span class=
+ "APPLICATION">Privoxy</span> could not get the response without
+ completely reading the leftovers from the previous response.</p>
+ <p>These are just two examples, there are currently a bit more than 25
+ scenarios in which a socket is considered tainted.</p>
+ <p>While sockets can also be marked tainted as a result of a technical
+ problem that may be worth fixing, the problem will be explicitly logged
+ as error.</p>
+ </div>
+ <div class="SECT2">
+ <h3 class="SECT2"><a name="PCRE-STACK-LIMIT" id=
+ "PCRE-STACK-LIMIT">5.25. After adding my custom filters, <span class=
+ "APPLICATION">Privoxy</span> crashes when visitting certain
+ websites</a></h3>
+ <p>This can happen if your custom filters require more memory than
+ <span class="APPLICATION">Privoxy</span> is allowed to use. Usually the
+ problem is that the operating system enforces a stack size limit that
+ isn't sufficient.</p>
+ <p>Unless the problem occurs with the filters available in the default
+ configuration, this is not considered a Privoxy bug.</p>
+ <p>To prevent the crashes you can rewrite your filter to use less
+ ressources, increase the relevant memory limit or recompile pcre to use
+ less stack space. For details please see the <a href=
+ "http://pcre.org/original/doc/html/pcrestack.html" target=
+ "_top">pcrestack man page</a> and the documentation of your operating
+ system.</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="misc.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="contact.html"
+ accesskey="N">Next</a></td>
+ </tr>
+ <tr>
+ <td width="33%" align="left" valign="top">Miscellaneous</td>
+ <td width="34%" align="center" valign="top"> </td>
+ <td width="33%" align="right" valign="top">Contacting the developers,
+ Bug Reporting and Feature Requests</td>
+ </tr>
+ </table>
+ </div>
+</body>
+</html>
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