Either Privoxy is not running, or your - browser is configured for a different port than what - Privoxy is using.
Early Privoxy versions (and also - Junkbuster) used port 8000 by - default. This has been changed to port 8118 now, due to a conflict - with NAS (Network Audio Service), which uses port 8000. If you haven't, - you need to change your browser to the new port number, or alternately - change the listen-address - option in Privoxy's main configuration file.
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 Privoxy - will not be in the picture. The best thing to do is try flushing the browser's - caches. And then try again.
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 http://config.privoxy.org/show-url-info - 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.
First verify that it is indeed a Privoxy problem, - by toggling off Privoxy through http://config.privoxy.org/toggle, - 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).
If still a problem, go to http://config.privoxy.org/show-url-info - 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. Now, armed with this information, go to http://config.privoxy.org/show-status - and select the appropriate actions files for editing.
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!
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 { fragile } section in user.action, - which is an alias that turns off most "dangerous" - actions, but is also likely to turn off more actions then needed, and thus lower - your privacy and protection more than necessary,
Troubleshooting actions is discussed in more detail in the user-manual appendix. - There is also an actions tutorial.
This is a quirk that effects the installation of - Privoxy, 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.
When setting up an NT based Windows system with - Privoxy 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.
When setting up Privoxy 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 - Privoxy. 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!
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.
[Thanks to Ray Griffith for this submission.]
Privoxy cannot act as a proxy for FTP traffic, - so do not configure your browser to use Privoxy - as an FTP proxy. The same is true for any protocol other than HTTP - or HTTPS. -
Most browsers understand FTP as well as HTTP. If you connect to a site, with - a URL like ftp://ftp.example.com, your browser is making - an FTP connection, and not a HTTP connection. So while your browser may - speak FTP, Privoxy does not, and cannot proxy - such traffic. -
To complicate matters, some systems may have a generic "proxy" - setting, which will silently enable both HTTP and FTP - proxying! So it is possible to accidentally enable FTP proxying in these - cases. And of course, if this happens, Privoxy - will indeed cause problems since it does not know FTP. -
Will Privoxy ever proxy FTP traffic? Unlikely. - There just is not much reason, and the work to make this happen is more than - it may seem. -
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 127.0.0.1 in the entry field. - Enter 8118 in the Port field. The next time you start - IE, it should reflect these values. -
Just dragging the Privoxy folder to the trash is - not enough to delete it. Privoxy supplies an - uninstall.command file that takes care of - these details. Open the trash, drag the uninstall.command - file out of the trash and double-click on it. You will be prompted for - confirmation and the administration password. -
The trash may still appear full after this command; emptying the trash - from the desktop should make it appear empty again. -
We believe this is due to an IPv6-related bug in OSX, but don't fully - understand the issue yet. In any case, changing the proxy setting to - 127.0.0.1 instead of localhost - works around the problem. -
Chances are that the site suffers from a bug in - PHP, - which results in empty pages being sent if the client explicitly requests - an uncompressed page, like Privoxy does. - This bug has been fixed in PHP 4.2.3. -
To find out if this is in fact the source of the problem, try adding - the site to a -prevent-compression section in - user.action: -
# Make exceptions for ill-behaved sites:
- #
- {-prevent-compression}
- .example.com |
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). -
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. -
Privoxy 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 config file - listen-address setting). If the system cannot supply - this information, Privoxy logs this condition.
Typically, this would be considered a minor system configuration error. It is - not a fatal error to Privoxy however, but may - result in a much slower response from Privoxy on - some platforms due to DNS timeouts.
Port 8118 is Privoxy's default TCP - "listening" port. Typically this message would mean that there - is already one instance of Privoxy running, and - you are actually trying to start a second Privoxy - 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.
This is caused by the "demoronizer" filter. You should either - upgrade Privoxy, or at least upgrade to the most - recent default.action file available from SourceForge. - Or you can simply disable the demoronizer filter.
This may also be caused by the "demoronizer" filter, - in conjunction with a web server that is misreporting a file type. Binary - files are exempted from Privoxy's filtering - (unless the web server by mistake says the file is something else). Either - upgrade Privoxy, or go to the most recent - default.action file available from SourceForge.
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. Privoxy borrowed from this - script, introducing a filter based on the original demoronizer, which in turn could - correct these errors on the fly.
But this is only needed in some situations, and will cause serious problems in some - other situations.
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 should not be on.
On the other hand, if you use non-Microsoft products, and you occasionally - notice wierd characters on pages, you might want to try it.
Privoxy is attempting to disable malicious - Javascript in this case, with the unsolicited-popups - filter. Privoxy cannot tell very well - "good" code snippets from "bad" code snippets.
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.
There are potentially several factors here. First of all, the DNS resolution - is done by the underlying operating system -- not - Privoxy itself. Privoxy - 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 alernate approaches (e.g - adding "www." to the URL). In other cases, if - Privoxy is being chained with another proxy, this - could complicate the issue, and cause undue - delays and timeouts. In the case of a "socks4a" proxy, the socks - server handles all the DNS. Privoxy would just be - the "messenger" which is reporting whatever problem occurred - downstream, and not the root cause of the error.
In any case, v. 3.0.4 includes various improvements to help - Privoxy better handle these cases.
This is probably a manifestation of the "100% cpu" 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 Privoxy's page filtering - mechanism is trying to match against absurdly long strings and this becomes - very CPU-intensive, taking a long, long time to complete. Until a better - solution comes along, disable filtering on these pages, particularly the - js-annoyances and unsolicited-popups - filters.
There are several possibilities:
+Privoxy is not running. + Solution: verify that Privoxy is + installed correctly, has not crashed, and is indeed running. Turn + on Privoxy's logging, and look at + the logs to see what they say.
+Or your browser is configured for a different port than what + Privoxy is using. Solution: verify + that Privoxy and your browser are + set to the same port (listen-address).
+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.
+Or you have a firewall that is interfering and blocking you. + Solution: try disabling or removing the firewall as a simple + test.
+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.
+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 + Privoxy will not be involved. Flush + the browser's caches, and then try again.
+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 http://config.privoxy.org/show-url-info 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 Privoxy's logs (you may need to enable logging in + the main config file if its disabled).
+Below is a slightly modified real-life log snippet that originates + with one requested URL: www.example.com (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 + "page". 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 + "good" or "bad", + 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. Privoxy has "crunched" + (meaning caught and BLOCKED) quite a few items in this example, but + perhaps missed a few as well.
+
+ Request: www.example.com/ +Request: www.example.com/favicon.ico +Request: img.example.com/main.css +Request: img.example.com/sr.js +Request: example.betamarker.com/example.html +Request: www.lik-sang.com/Banners/bestsellers/skyscraper.php?likref=BSellers +Request: img.example.com/pb.png +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 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/hbg.gif +Request: img.example.com/example.jpg +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.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.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: 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+ |
+
Despite 12 out of 32 requests being blocked, the page looked, and + seemed to behave perfectly "normal" (minus + some ads, of course).
+First verify that it is indeed a Privoxy problem, by toggling off Privoxy through http://config.privoxy.org/toggle (the toggle feature may + need to be enabled in the main config), 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).
+If the problem went away, we know we have a configuration related + problem. Now go to http://config.privoxy.org/show-url-info 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 required. Now, armed with this information, go to + http://config.privoxy.org/show-status and select the + appropriate actions files for editing.
+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!
+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 { fragile } + section in user.action, which is an alias + that turns off most "dangerous" actions, but + is also likely to turn off more actions then needed, and thus lower + your privacy and protection more than necessary,
+Troubleshooting actions is discussed in more detail in the User Manual + appendix, Troubleshooting: the Anatomy of an Action. There is also + an actions tutorial with general configuration information and + examples.
+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.
+This is a quirk that affects the installation of Privoxy, 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.
+When setting up an NT based Windows system with Privoxy 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.
+When setting up Privoxy 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 + Privoxy. 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!
+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.
+[Thanks to Ray Griffith for this submission.]
+Privoxy cannot act as a proxy for + FTP traffic, so do not configure your browser to use Privoxy as an FTP proxy. The same is true for + any protocol other than HTTP + or HTTPS (SSL).
+Most browsers understand FTP as well as HTTP. If you connect to a + site, with a URL like ftp://ftp.example.com, + your browser is making an FTP connection, and not a HTTP connection. So + while your browser may speak FTP, Privoxy does not, and cannot proxy such + traffic.
+To complicate matters, some systems may have a generic "proxy" setting, which will enable various protocols, + including both + HTTP and FTP proxying! So it is possible to accidentally enable FTP + proxying in these cases. And of course, if this happens, Privoxy 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.
+Will Privoxy ever proxy FTP + traffic? Unlikely. There just is not much reason, and the work to make + this happen is more than it may seem.
+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 127.0.0.1 in the + entry field. Enter 8118 in the Port field. The + next time you start IE, it should reflect these values.
+Note: This ONLY applies to privoxy 3.0.6 and earlier.
+Just dragging the Privoxy folder to + the trash is not enough to delete it. Privoxy supplies an uninstall.command file that takes care of these + details. Open the trash, drag the uninstall.command file out of the trash and + double-click on it. You will be prompted for confirmation and the + administration password.
+The trash may still appear full after this command; emptying the + trash from the desktop should make it appear empty again.
+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 127.0.0.1 instead of localhost works around the problem.
+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, Privoxy 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 uninstall.command script (either back up your + configuration files or select to not have the uninstaller remove them + when it prompts you) and then reinstall Privoxy using the installer package and merge in + your configuration.
+Privoxy 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 config + file listen-address setting). If the system cannot + supply this information, Privoxy logs + this condition.
+Typically, this would be considered a minor system configuration + error. It is not a fatal error to Privoxy however, but may result in a much slower + response from Privoxy on some + platforms due to DNS timeouts.
+This can be caused by a problem with the local hosts 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.
+You should also be able to work around the problem with the hostname + option.
+Port 8118 is Privoxy's default TCP + "listening" port. Typically this message + would mean that there is already one instance of Privoxy running, and your system is actually + trying to start a second Privoxy 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.
+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 "demoronizer" filter, please try temporarily disabling + it.
+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.
+Once the problem-causing filter is known, it can be fixed or + disabled.
+Upgrading Privoxy, or going to the + most recent default.action file available + from SourceForge might be worth a try, too.
+This may also be caused by an (overly aggressive filter in conjunction + with a web server that is misreporting the content type. By default + binary files are exempted from Privoxy's filtering (unless the web server by + mistake says the file is something else).
+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. + Privoxy borrowed from this script, + introducing a filter based on the original demoronizer, which in turn + could correct these errors on the fly.
+But this is only needed in some situations, and will cause serious + problems in some other situations.
+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 should not be on.
+On the other hand, if you use non-Microsoft products, and you + occasionally notice weird characters on pages, you might want to try + it.
+Privoxy is attempting to disable + malicious Javascript in this case, with the unsolicited-popups filter. Privoxy cannot tell very well "good" code snippets from "bad" code snippets.
+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.
+There are potentially several factors here. First of all, the DNS + resolution is done by the underlying operating system -- not + Privoxy itself. Privoxy 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 "www." to the URL).
+In other cases, if Privoxy is being + chained with another proxy, this could complicate the issue, and cause + undue delays and timeouts. In the case of a "socks4a" proxy, the socks server handles all the DNS. + Privoxy would just be the "messenger" which is reporting whatever problem occurred + downstream, and not the root cause of the error.
+In any case, versions newer than 3.0.3 include various improvements + to help Privoxy better handle these + cases.
+This is probably a manifestation of the "100% + cpu" 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 Privoxy's page filtering + mechanism is trying to match against absurdly long strings and this + becomes very CPU-intensive, taking a long, long time to complete.
+Until a better solution comes along, disable filtering on these + pages, particularly the js-annoyances and + unsolicited-popups filters. If you run into + this problem with a recent Privoxy + version, please send a problem report.
+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 Privoxy + version, please report the problem.
+It's probably due to compression. It is a common practice for web + servers to send their content "compressed" + in order to speed things up, and then let the browser "uncompress" them. When compiled with zlib support + Privoxy can decompress content before + filtering, otherwise you may want to enable prevent-compression.
+As of Privoxy 3.0.9, zlib support + is enabled in the default builds.
+Probably the browser is requesting ads through HTTPS and + Privoxy 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.
+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.
+To do that, enable logging to figure out which requests get blocked + by Privoxy and add the hosts (no path + patterns) to a section like this:
+
+
+ {+redirect{http://127.0.0.1:0/} -block -limit-connect}
+.ivwbox.de:443/
+ |
+
Additionally you have to configure your browser to contact + "127.0.0.1:0" directly (instead of through + Privoxy).
+To add a proxy exception in Mozilla + Firefox open the "Preferences", click + the "Settings" button located on the + "Network" tab in the "Advanced" section, and add "127.0.0.1:0" in the "No Proxy + for:" field.
+Please report the problem to the creator of your selinux + policies.
+The problem is that some selinux policy writers aren't familiar with + the application they are trying to "secure" + and thus create policies that make no sense.
+In Privoxy's 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 Privoxy's default configuration doesn't block + these requests.
+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.
+Probably you unintentionally compiled Privoxy without threading support in which case + requests have to be serialized and only one can be served at the same + time.
+Check your "USE" flags and make sure they + include "threads". If they don't, add the + flag and rebuild Privoxy.
+If you compiled Privoxy with + threading support (on POSIX-based systems), the "Conditional #defines" section on http://config.privoxy.org/show-status will list "FEATURE_PTHREAD" as "enabled".
+Privoxy 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).
+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 Privoxy. Technically Privoxy 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).
+Server sockets are also marked tainted when a client requests a + resource, but closes the connection before Privoxy has completely received (and forwarded) + the resource to the client. In this case the server would (probably) + accept additional requests, but Privoxy could not get the response without + completely reading the leftovers from the previous response.
+These are just two examples, there are currently a bit more than 25 + scenarios in which a socket is considered tainted.
+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.
+This can happen if your custom filters require more memory than + Privoxy is allowed to use. Usually the + problem is that the operating system enforces a stack size limit that + isn't sufficient.
+Unless the problem occurs with the filters available in the default + configuration, this is not considered a Privoxy bug.
+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 pcrestack man page and the documentation of your operating + system.
+