-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
-<HTML
-><HEAD
-><TITLE
->Privoxy Frequently Asked Questions</TITLE
-><META
-NAME="GENERATOR"
-CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
-REL="NEXT"
-TITLE="General Information"
-HREF="general.html"><LINK
-REL="STYLESHEET"
-TYPE="text/css"
-HREF="../p_doc.css"></HEAD
-><BODY
-CLASS="ARTICLE"
-BGCOLOR="#EEEEEE"
-TEXT="#000000"
-LINK="#0000FF"
-VLINK="#840084"
-ALINK="#0000FF"
-><DIV
-CLASS="ARTICLE"
-><DIV
-CLASS="TITLEPAGE"
-><H1
-CLASS="TITLE"
-><A
-NAME="AEN2"
->Privoxy Frequently Asked Questions</A
-></H1
-><P
-CLASS="PUBDATE"
-> <SUB
-> <A
-HREF="copyright.html"
->Copyright</A
-> © 2001-2007 by
- <A
-HREF="http://www.privoxy.org/"
-TARGET="_top"
->Privoxy Developers</A
->
- </SUB
-><BR></P
-><P
-CLASS="PUBDATE"
->$Id: faq.sgml,v 2.35 2007/11/19 17:57:59 fabiankeil Exp $<BR></P
-><DIV
-><DIV
-CLASS="ABSTRACT"
-><P
-></P
-><A
-NAME="AEN9"
-></A
-><P
-> This FAQ gives quick answers to frequently asked questions about
- <A
-HREF="http://www.privoxy.org/"
-TARGET="_top"
->Privoxy</A
->.
- It is not a substitute for the
- <A
-HREF="../user-manual/index.html"
-TARGET="_top"
-><I
-CLASS="CITETITLE"
->Privoxy User Manual</I
-></A
->.
-
- </P
-><P
->What is Privoxy?</P
-><P
-> Privoxy is a non-caching
- <A
-HREF="http://en.wikipedia.org/wiki/Proxy_server"
-TARGET="_top"
->web proxy</A
->
- with advanced filtering capabilities for enhancing privacy,
- modifying web page data, managing HTTP
- <A
-HREF="http://en.wikipedia.org/wiki/Browser_cookie"
-TARGET="_top"
->cookies</A
->,
- controlling access, and removing ads, banners, pop-ups and other obnoxious
- Internet junk. Privoxy has a flexible configuration and can be
- customized to suit individual needs and tastes. Privoxy has application for
- both stand-alone systems and multi-user networks.</P
-><P
-> Privoxy is based on Internet Junkbuster (tm).</P
-><P
-> Please note that this document is a work in progress. This copy represents
- the state at the release of version 3.0.7.
- You can find the latest version of the document at <A
-HREF="http://www.privoxy.org/faq/"
-TARGET="_top"
->http://www.privoxy.org/faq/</A
->.
- Please see the <A
-HREF="contact.html"
->Contact section</A
-> if you want to
- contact the developers.
- </P
-><P
-></P
-></DIV
-></DIV
-><HR></DIV
-><DIV
-CLASS="TOC"
-><DL
-><DT
-><B
->Table of Contents</B
-></DT
-><DT
->1. <A
-HREF="general.html"
->General Information</A
-></DT
-><DD
-><DL
-><DT
->1.1. <A
-HREF="general.html#WHO-USES"
->Who should give <SPAN
-CLASS="APPLICATION"
->Privoxy</SPAN
-> a try?</A
-></DT
-><DT
->1.2. <A
-HREF="general.html#BESTCHOICE"
->Is Privoxy the best choice for
-me?</A
-></DT
-><DT
->1.3. <A
-HREF="general.html#PROXYMORON"
->What is a <SPAN
-CLASS="QUOTE"
->"proxy"</SPAN
->? How does
-Privoxy work?</A
-></DT
-><DT
->1.4. <A
-HREF="general.html#OTHERSTUFF"
->Does Privoxy do anything more than ad blocking?</A
-></DT
-><DT
->1.5. <A
-HREF="general.html#NEWJB"
->What is this new version of
-<SPAN
-CLASS="QUOTE"
->"Junkbuster"</SPAN
->?</A
-></DT
-><DT
->1.6. <A
-HREF="general.html#AEN79"
->Why <SPAN
-CLASS="QUOTE"
->"Privoxy"</SPAN
->? Why change the name from
-Junkbuster at all?</A
-></DT
-><DT
->1.7. <A
-HREF="general.html#DIFFERS"
->How does Privoxy differ
-from the old Junkbuster?</A
-></DT
-><DT
->1.8. <A
-HREF="general.html#WHATSANAD"
->How does Privoxy know what is
-an ad, and what is not?</A
-></DT
-><DT
->1.9. <A
-HREF="general.html#AEN151"
->Can Privoxy make mistakes?
-This does not sound very scientific.</A
-></DT
-><DT
->1.10. <A
-HREF="general.html#AEN157"
->Will I have to configure Privoxy
- before I can use it?</A
-></DT
-><DT
->1.11. <A
-HREF="general.html#LAN"
->Can Privoxy run as a server on a network?</A
-></DT
-><DT
->1.12. <A
-HREF="general.html#BROWSERS2"
->My browser does the same things as
-Privoxy. Why should I use Privoxy at all?</A
-></DT
-><DT
->1.13. <A
-HREF="general.html#WHYTRUST"
->Why should I trust Privoxy?</A
-></DT
-><DT
->1.14. <A
-HREF="general.html#LICENSE"
->Is there is a license or fee? What about a
-warranty? Registration?</A
-></DT
-><DT
->1.15. <A
-HREF="general.html#SPYWARE"
->Can Privoxy remove spyware? Adware? Viruses?</A
-></DT
-><DT
->1.16. <A
-HREF="general.html#OTHERADS"
->Can I use Privoxy with other ad-blocking software?</A
-></DT
-><DT
->1.17. <A
-HREF="general.html#JOINTEAM"
->I would like to help you, what can I do?</A
-></DT
-><DD
-><DL
-><DT
->1.17.1. <A
-HREF="general.html#JOINTEAM-WORK"
->Would you like to participate?</A
-></DT
-><DT
->1.17.2. <A
-HREF="general.html#JOINTEAM-MONEY"
->Contribute!</A
-></DT
-><DT
->1.17.3. <A
-HREF="general.html#JOINTEAM-SOFTWARE"
->Software</A
-></DT
-></DL
-></DD
-></DL
-></DD
-><DT
->2. <A
-HREF="installation.html"
->Installation</A
-></DT
-><DD
-><DL
-><DT
->2.1. <A
-HREF="installation.html#WHICHBROWSERS"
->Which browsers are supported by Privoxy?</A
-></DT
-><DT
->2.2. <A
-HREF="installation.html#WHICHOS"
->Which operating systems are supported?</A
-></DT
-><DT
->2.3. <A
-HREF="installation.html#EMAIL-CLIENT"
->Can I use Privoxy with my email client?</A
-></DT
-><DT
->2.4. <A
-HREF="installation.html#FIRSTSTEP"
->I just installed Privoxy. Is there anything
-special I have to do now?</A
-></DT
-><DT
->2.5. <A
-HREF="installation.html#LOCALHOST"
->What is the proxy address of Privoxy?</A
-></DT
-><DT
->2.6. <A
-HREF="installation.html#NOTHING"
->I just installed Privoxy, and nothing is happening.
-All the ads are there. What's wrong?</A
-></DT
-><DT
->2.7. <A
-HREF="installation.html#NOTUSED"
->I get a <SPAN
-CLASS="QUOTE"
->"Privoxy is not being used"</SPAN
-> dummy page although
-Privoxy is running and being used.</A
-></DT
-></DL
-></DD
-><DT
->3. <A
-HREF="configuration.html"
->Configuration</A
-></DT
-><DD
-><DL
-><DT
->3.1. <A
-HREF="configuration.html#AEN341"
->What exactly is an <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> file?</A
-></DT
-><DT
->3.2. <A
-HREF="configuration.html#ACTIONSS"
->The <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> concept confuses me. Please list
-some of these <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
->.</A
-></DT
-><DT
->3.3. <A
-HREF="configuration.html#AEN364"
->How are actions files configured? What is the easiest
-way to do this?</A
-></DT
-><DT
->3.4. <A
-HREF="configuration.html#AEN373"
->There are several different <SPAN
-CLASS="QUOTE"
->"actions"</SPAN
-> files. What are
-the differences?</A
-></DT
-><DT
->3.5. <A
-HREF="configuration.html#GETUPDATES"
->Where can I get updated Actions Files?</A
-></DT
-><DT
->3.6. <A
-HREF="configuration.html#NEWCONFIG"
->Can I use my old config files?</A
-></DT
-><DT
->3.7. <A
-HREF="configuration.html#DIFFICULT"
->Why is the configuration so complicated?</A
-></DT
-><DT
->3.8. <A
-HREF="configuration.html#YAHOO"
->How can I make my Yahoo/Hotmail/Gmail account work?</A
-></DT
-><DT
->3.9. <A
-HREF="configuration.html#CONFIGFILES"
->What's the difference between the
-<SPAN
-CLASS="QUOTE"
->"Cautious"</SPAN
->, <SPAN
-CLASS="QUOTE"
->"Medium"</SPAN
-> and <SPAN
-CLASS="QUOTE"
->"Advanced"</SPAN
-> defaults?</A
-></DT
-><DT
->3.10. <A
-HREF="configuration.html#BROWSECONFIG"
->Why can I change the configuration
-with a browser? Does that not raise security issues?</A
-></DT
-><DT
->3.11. <A
-HREF="configuration.html#AEN470"
->What is the <TT
-CLASS="FILENAME"
->default.filter</TT
-> file? What is a <SPAN
-CLASS="QUOTE"
->"filter"</SPAN
->?</A
-></DT
-><DT
->3.12. <A
-HREF="configuration.html#LANCONFIG"
->How can I set up Privoxy to act as a proxy for my
- LAN?</A
-></DT
-><DT
->3.13. <A
-HREF="configuration.html#AEN521"
->Instead of ads, now I get a checkerboard pattern. I don't want to see anything.</A
-></DT
-><DT
->3.14. <A
-HREF="configuration.html#AEN538"
->Why would anybody want to see a checkerboard pattern?</A
-></DT
-><DT
->3.15. <A
-HREF="configuration.html#AEN544"
->I see some images being replaced with text
-instead of the checkerboard image. Why and how do I get rid of this?</A
-></DT
-><DT
->3.16. <A
-HREF="configuration.html#SRVANY"
->Can Privoxy run as a service
-on Win2K/NT/XP?</A
-></DT
-><DT
->3.17. <A
-HREF="configuration.html#OTHERPROXY"
->How can I make Privoxy work with other
-proxies like Squid or Tor?</A
-></DT
-><DT
->3.18. <A
-HREF="configuration.html#PORT-80"
->Can I just set Privoxy to use port 80
-and thus avoid individual browser configuration?</A
-></DT
-><DT
->3.19. <A
-HREF="configuration.html#TRANSPARENT"
->Can Privoxy run as a <SPAN
-CLASS="QUOTE"
->"transparent"</SPAN
-> proxy?</A
-></DT
-><DT
->3.20. <A
-HREF="configuration.html#INTERCEPTING"
->Can Privoxy run as a <SPAN
-CLASS="QUOTE"
->"intercepting"</SPAN
-> proxy?</A
-></DT
-><DT
->3.21. <A
-HREF="configuration.html#OUTLOOK"
->How can I configure Privoxy for use with Outlook
- Express?</A
-></DT
-><DT
->3.22. <A
-HREF="configuration.html#OUTLOOK-MORE"
->How can I have separate rules just for HTML mail?</A
-></DT
-><DT
->3.23. <A
-HREF="configuration.html#SNEAKY-COOKIES"
->I sometimes notice cookies sneaking through. How?</A
-></DT
-><DT
->3.24. <A
-HREF="configuration.html#EVIL-COOKIES"
->Are all cookies bad? Why?</A
-></DT
-><DT
->3.25. <A
-HREF="configuration.html#ALLOW-COOKIES"
->How can I allow permanent cookies for my trusted sites?</A
-></DT
-><DT
->3.26. <A
-HREF="configuration.html#MULTIPLES"
->Can I have separate configurations for different users?</A
-></DT
-><DT
->3.27. <A
-HREF="configuration.html#WHITELISTS"
->Can I set-up Privoxy as a whitelist of
-<SPAN
-CLASS="QUOTE"
->"good"</SPAN
-> sites?</A
-></DT
-><DT
->3.28. <A
-HREF="configuration.html#NO-ADBLOCK"
->How can I turn off ad-blocking?</A
-></DT
-><DT
->3.29. <A
-HREF="configuration.html#TEMPLATES"
->How can I have custom template pages, like the
-<SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->BLOCKED</I
-></SPAN
-> page?</A
-></DT
-><DT
->3.30. <A
-HREF="configuration.html#BLOCKALL"
->How can I remove the <SPAN
-CLASS="QUOTE"
->"Go There Anyway"</SPAN
-> link from
-the <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->BLOCKED</I
-></SPAN
-> page?</A
-></DT
-></DL
-></DD
-><DT
->4. <A
-HREF="misc.html"
->Miscellaneous</A
-></DT
-><DD
-><DL
-><DT
->4.1. <A
-HREF="misc.html#AEN717"
->How much does Privoxy slow my browsing down? This
-has to add extra time to browsing.</A
-></DT
-><DT
->4.2. <A
-HREF="misc.html#LOADINGTIMES"
->I notice considerable
-delays in page requests. What's wrong?</A
-></DT
-><DT
->4.3. <A
-HREF="misc.html#CONFIGURL"
->What are "http://config.privoxy.org/" and
-"http://p.p/"?</A
-></DT
-><DT
->4.4. <A
-HREF="misc.html#NEWADS"
->How can I submit new ads, or report
-problems?</A
-></DT
-><DT
->4.5. <A
-HREF="misc.html#NEWADS2"
->If I do submit missed ads, will
-they be included in future updates?</A
-></DT
-><DT
->4.6. <A
-HREF="misc.html#NOONECARES"
->Why doesn't anyone answer my support
-request?</A
-></DT
-><DT
->4.7. <A
-HREF="misc.html#IP"
->How can I hide my IP address?</A
-></DT
-><DT
->4.8. <A
-HREF="misc.html#AEN782"
->Can Privoxy guarantee I am anonymous?</A
-></DT
-><DT
->4.9. <A
-HREF="misc.html#AEN800"
->A test site says I am not using a Proxy.</A
-></DT
-><DT
->4.10. <A
-HREF="misc.html#TOR"
->How do I use Privoxy
- together with Tor?</A
-></DT
-><DT
->4.11. <A
-HREF="misc.html#AEN856"
->Might some things break because header information or
-content is being altered?</A
-></DT
-><DT
->4.12. <A
-HREF="misc.html#AEN870"
->Can Privoxy act as a <SPAN
-CLASS="QUOTE"
->"caching"</SPAN
-> proxy to
-speed up web browsing?</A
-></DT
-><DT
->4.13. <A
-HREF="misc.html#AEN880"
->What about as a firewall? Can Privoxy protect me?</A
-></DT
-><DT
->4.14. <A
-HREF="misc.html#AEN885"
->I have large empty spaces / a checkerboard pattern now where
-ads used to be. Why?</A
-></DT
-><DT
->4.15. <A
-HREF="misc.html#AEN893"
->How can Privoxy filter Secure (HTTPS) URLs?</A
-></DT
-><DT
->4.16. <A
-HREF="misc.html#AEN907"
->Privoxy runs as a <SPAN
-CLASS="QUOTE"
->"server"</SPAN
->. How
-secure is it? Do I need to take any special precautions?</A
-></DT
-><DT
->4.17. <A
-HREF="misc.html#TURNOFF"
->Can I temporarily disable Privoxy?</A
-></DT
-><DT
->4.18. <A
-HREF="misc.html#REALLYOFF"
->When <SPAN
-CLASS="QUOTE"
->"disabled"</SPAN
-> is Privoxy totally
-out of the picture?</A
-></DT
-><DT
->4.19. <A
-HREF="misc.html#TURNOFF2"
->How can I tell Privoxy to totally ignore certain sites?</A
-></DT
-><DT
->4.20. <A
-HREF="misc.html#CRUNCH"
->My logs show Privoxy <SPAN
-CLASS="QUOTE"
->"crunches"</SPAN
->
-ads, but also its own internal CGI pages. What is a <SPAN
-CLASS="QUOTE"
->"crunch"</SPAN
->?</A
-></DT
-><DT
->4.21. <A
-HREF="misc.html#DOWNLOADS"
->Can Privoxy effect files that I download
-from a webserver? FTP server?</A
-></DT
-><DT
->4.22. <A
-HREF="misc.html#DOWNLOADS2"
->I just downloaded a Perl script, and Privoxy
-altered it! Yikes, what is wrong!</A
-></DT
-><DT
->4.23. <A
-HREF="misc.html#HOSTSFILE"
->Should I continue to use a <SPAN
-CLASS="QUOTE"
->"HOSTS"</SPAN
-> file for ad-blocking?</A
-></DT
-><DT
->4.24. <A
-HREF="misc.html#SEEALSO"
->Where can I find more information about Privoxy
-and related issues?</A
-></DT
-><DT
->4.25. <A
-HREF="misc.html#MICROSUCK"
->I've noticed that Privoxy changes <SPAN
-CLASS="QUOTE"
->"Microsoft"</SPAN
-> to
-<SPAN
-CLASS="QUOTE"
->"MicroSuck"</SPAN
->! Why are you manipulating my browsing?</A
-></DT
-><DT
->4.26. <A
-HREF="misc.html#VALID"
->Does Privoxy produce <SPAN
-CLASS="QUOTE"
->"valid"</SPAN
-> HTML (or XHTML)?</A
-></DT
-></DL
-></DD
-><DT
->5. <A
-HREF="trouble.html"
->Troubleshooting</A
-></DT
-><DD
-><DL
-><DT
->5.1. <A
-HREF="trouble.html#AEN1075"
->I cannot connect to any websites. Or, I am getting
-<SPAN
-CLASS="QUOTE"
->"connection refused"</SPAN
-> message with every web page. Why?</A
-></DT
-><DT
->5.2. <A
-HREF="trouble.html#ERROR503"
->Why am I getting a 503 Error (WSAECONNREFUSED) on every page?</A
-></DT
-><DT
->5.3. <A
-HREF="trouble.html#AEN1098"
->I just added a new rule, but the steenkin ad is
-still getting through. How?</A
-></DT
-><DT
->5.4. <A
-HREF="trouble.html#BADSITE"
->One of my favorite sites does not work with Privoxy.
-What can I do?</A
-></DT
-><DT
->5.5. <A
-HREF="trouble.html#DUN"
->After installing Privoxy, I have to log in
-every time I start IE. What gives?</A
-></DT
-><DT
->5.6. <A
-HREF="trouble.html#FTP"
->I cannot connect to any FTP sites. Privoxy
- is blocking me.</A
-></DT
-><DT
->5.7. <A
-HREF="trouble.html#OSXIE"
->In Mac OSX, I can't configure Microsoft Internet Explorer to use
- Privoxy as the HTTP proxy.</A
-></DT
-><DT
->5.8. <A
-HREF="trouble.html#OSXUNINSTALL"
->In Mac OSX, 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
-></DT
-><DT
->5.9. <A
-HREF="trouble.html#OSXIMAGES"
->In Mac OSX 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
-></DT
-><DT
->5.10. <A
-HREF="trouble.html#BLANKPAGE"
->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
-></DT
-><DT
->5.11. <A
-HREF="trouble.html#NOHOSTNAME"
->My logs show many <SPAN
-CLASS="QUOTE"
->"Unable to get my own hostname"</SPAN
-> lines.
-Why?</A
-></DT
-><DT
->5.12. <A
-HREF="trouble.html#INUSE"
->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
-></DT
-><DT
->5.13. <A
-HREF="trouble.html#DEMORONIZER"
->Pages with UTF-8 fonts are garbled.</A
-></DT
-><DT
->5.14. <A
-HREF="trouble.html#DEMORONIZER2"
->Why are binary files (such as images) corrupted when Privoxy
- is used?</A
-></DT
-><DT
->5.15. <A
-HREF="trouble.html#DEMORONIZER3"
->What is the <SPAN
-CLASS="QUOTE"
->"demoronizer"</SPAN
-> and why is it there?</A
-></DT
-><DT
->5.16. <A
-HREF="trouble.html#WINDOWOPEN"
->Why do I keep seeing <SPAN
-CLASS="QUOTE"
->"PrivoxyWindowOpen()"</SPAN
-> in raw source code?</A
-></DT
-><DT
->5.17. <A
-HREF="trouble.html#DNSERRORS"
->I am getting too many DNS errors like <SPAN
-CLASS="QUOTE"
->"404 No Such Domain"</SPAN
->. Why
- can't Privoxy do this better?</A
-></DT
-><DT
->5.18. <A
-HREF="trouble.html#ALLCPU"
->At one site Privoxy just hangs, and starts taking
- all CPU. Why is this?</A
-></DT
-><DT
->5.19. <A
-HREF="trouble.html#SLOWCRAWL"
->I just installed Privoxy, and all my
-browsing has slowed to a crawl. What gives?</A
-></DT
-><DT
->5.20. <A
-HREF="trouble.html#PREVENTCOMP"
->Why do my filters work on some sites but not on others?</A
-></DT
-></DL
-></DD
-><DT
->6. <A
-HREF="contact.html"
->Contacting the developers, Bug Reporting and Feature Requests</A
-></DT
-><DD
-><DL
-><DT
->6.1. <A
-HREF="contact.html#CONTACT-SUPPORT"
->Get Support</A
-></DT
-><DT
->6.2. <A
-HREF="contact.html#REPORTING"
->Reporting Problems</A
-></DT
-><DD
-><DL
-><DT
->6.2.1. <A
-HREF="contact.html#CONTACT-ADS"
->Reporting Ads or Other Configuration Problems</A
-></DT
-><DT
->6.2.2. <A
-HREF="contact.html#CONTACT-BUGS"
->Reporting Bugs</A
-></DT
-></DL
-></DD
-><DT
->6.3. <A
-HREF="contact.html#CONTACT-FEATURE"
->Request New Features</A
-></DT
-><DT
->6.4. <A
-HREF="contact.html#CONTACT-OTHER"
->Other</A
-></DT
-></DL
-></DD
-><DT
->7. <A
-HREF="copyright.html"
->Privoxy Copyright, License and History</A
-></DT
-><DD
-><DL
-><DT
->7.1. <A
-HREF="copyright.html#AEN1389"
->License</A
-></DT
-><DT
->7.2. <A
-HREF="copyright.html#AEN1405"
->History</A
-></DT
-></DL
-></DD
-></DL
-></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"
-> </TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-> </TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
-><A
-HREF="general.html"
-ACCESSKEY="N"
->Next</A
-></TD
-></TR
-><TR
-><TD
-WIDTH="33%"
-ALIGN="left"
-VALIGN="top"
-> </TD
-><TD
-WIDTH="34%"
-ALIGN="center"
-VALIGN="top"
-> </TD
-><TD
-WIDTH="33%"
-ALIGN="right"
-VALIGN="top"
->General Information</TD
-></TR
-></TABLE
-></DIV
-></BODY
-></HTML
->
\ No newline at end of file
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
+"http://www.w3.org/TR/html4/loose.dtd">
+
+<html>
+<head>
+ <title>Privoxy Frequently Asked Questions</title>
+ <meta name="GENERATOR" content=
+ "Modular DocBook HTML Stylesheet Version 1.79">
+ <link rel="NEXT" title="General Information" href="general.html">
+ <link rel="STYLESHEET" type="text/css" href="../p_doc.css">
+ <meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
+</head>
+
+<body class="ARTICLE" bgcolor="#EEEEEE" text="#000000" link="#0000FF" vlink=
+"#840084" alink="#0000FF">
+ <div class="ARTICLE">
+ <div class="TITLEPAGE">
+ <h1 class="TITLE"><a name="AEN2" id="AEN2">Privoxy Frequently Asked
+ Questions</a></h1>
+
+ <p class="PUBDATE"><sub><a href="copyright.html">Copyright</a> ©
+ 2001-2014 by <a href="http://www.privoxy.org/" target="_top">Privoxy
+ Developers</a></sub><br></p>
+
+ <p class="PUBDATE">$Id: faq.sgml,v 2.119 2016/03/17 10:18:57 fabiankeil
+ Exp $<br></p>
+
+ <div>
+ <div class="ABSTRACT">
+ <a name="AEN9" id="AEN9"></a>
+
+ <p>This FAQ gives quick answers to frequently asked questions about
+ <a href="http://www.privoxy.org/" target="_top">Privoxy</a>. It is
+ not a substitute for the <a href="../user-manual/index.html"
+ target="_top"><i class="CITETITLE">Privoxy User Manual</i></a>.</p>
+
+ <p>What is Privoxy?</p>
+
+ <p>Privoxy is a non-caching web proxy with advanced filtering
+ capabilities for enhancing privacy, modifying web page data and
+ HTTP headers, controlling access, and removing ads and other
+ obnoxious Internet junk. Privoxy has a flexible configuration and
+ can be customized to suit individual needs and tastes. It has
+ application for both stand-alone systems and multi-user
+ networks.</p>
+
+ <p>Privoxy is Free Software and licensed under the GNU GPLv2.</p>
+
+ <p>Privoxy is an associated project of Software in the Public
+ Interest (SPI).</p>
+
+ <p>Helping hands and donations are welcome:</p>
+
+ <ul>
+ <li>
+ <p><a href=
+ "http://www.privoxy.org/faq/general.html#PARTICIPATE" target=
+ "_top">http://www.privoxy.org/faq/general.html#PARTICIPATE</a></p>
+ </li>
+
+ <li>
+ <p><a href="http://www.privoxy.org/faq/general.html#DONATE"
+ target=
+ "_top">http://www.privoxy.org/faq/general.html#DONATE</a></p>
+ </li>
+ </ul>
+
+ <p>Please note that this document is a work in progress. This copy
+ represents the state at the release of version 3.0.25. You can find
+ the latest version of the document at <a href=
+ "http://www.privoxy.org/faq/" target=
+ "_top">http://www.privoxy.org/faq/</a>. Please see the <a href=
+ "contact.html">Contact section</a> if you want to contact the
+ developers.</p>
+ </div>
+ </div>
+ <hr>
+ </div>
+
+ <div class="TOC">
+ <dl>
+ <dt><b>Table of Contents</b></dt>
+
+ <dt>1. <a href="general.html">General Information</a></dt>
+
+ <dd>
+ <dl>
+ <dt>1.1. <a href="general.html#WHO-USES">Who should give
+ <span class="APPLICATION">Privoxy</span> a try?</a></dt>
+
+ <dt>1.2. <a href="general.html#BESTCHOICE">Is Privoxy the best
+ choice for me?</a></dt>
+
+ <dt>1.3. <a href="general.html#PROXYMORON">What is a <span class=
+ "QUOTE">"proxy"</span>? How does Privoxy work?</a></dt>
+
+ <dt>1.4. <a href="general.html#OTHERSTUFF">Does Privoxy do
+ anything more than ad blocking?</a></dt>
+
+ <dt>1.5. <a href="general.html#NEWJB">What is this new version of
+ <span class="QUOTE">"Junkbuster"</span>?</a></dt>
+
+ <dt>1.6. <a href="general.html#WHYPRIVOXY">Why <span class=
+ "QUOTE">"Privoxy"</span>? Why change the name from Junkbuster at
+ all?</a></dt>
+
+ <dt>1.7. <a href="general.html#DIFFERS">How does Privoxy differ
+ from the old Junkbuster?</a></dt>
+
+ <dt>1.8. <a href="general.html#WHATSANAD">How does Privoxy know
+ what is an ad, and what is not?</a></dt>
+
+ <dt>1.9. <a href="general.html#MISTAKES">Can Privoxy make
+ mistakes? This does not sound very scientific.</a></dt>
+
+ <dt>1.10. <a href="general.html#CONFIGORNOT">Will I have to
+ configure Privoxy before I can use it?</a></dt>
+
+ <dt>1.11. <a href="general.html#LAN">Can Privoxy run as a server
+ on a network?</a></dt>
+
+ <dt>1.12. <a href="general.html#BROWSERS2">My browser does the
+ same things as Privoxy. Why should I use Privoxy at all?</a></dt>
+
+ <dt>1.13. <a href="general.html#WHYTRUST">Why should I trust
+ Privoxy?</a></dt>
+
+ <dt>1.14. <a href="general.html#LICENSE">Is there is a license or
+ fee? What about a warranty? Registration?</a></dt>
+
+ <dt>1.15. <a href="general.html#SPYWARE">Can Privoxy remove
+ spyware? Adware? Viruses?</a></dt>
+
+ <dt>1.16. <a href="general.html#OTHERADS">Can I use Privoxy with
+ other ad-blocking software?</a></dt>
+
+ <dt>1.17. <a href="general.html#HELP-THE-DEVELOPERS">I would like
+ to help you, what can I do?</a></dt>
+
+ <dd>
+ <dl>
+ <dt>1.17.1. <a href="general.html#PARTICIPATE">Would you like
+ to participate?</a></dt>
+
+ <dt>1.17.2. <a href="general.html#DONATE">Would you like to
+ donate?</a></dt>
+ </dl>
+ </dd>
+ </dl>
+ </dd>
+
+ <dt>2. <a href="installation.html">Installation</a></dt>
+
+ <dd>
+ <dl>
+ <dt>2.1. <a href="installation.html#WHICHBROWSERS">Which browsers
+ are supported by Privoxy?</a></dt>
+
+ <dt>2.2. <a href="installation.html#WHICHOS">Which operating
+ systems are supported?</a></dt>
+
+ <dt>2.3. <a href="installation.html#EMAIL-CLIENT">Can I use
+ Privoxy with my email client?</a></dt>
+
+ <dt>2.4. <a href="installation.html#FIRSTSTEP">I just installed
+ Privoxy. Is there anything special I have to do now?</a></dt>
+
+ <dt>2.5. <a href="installation.html#LOCALHOST">What is the proxy
+ address of Privoxy?</a></dt>
+
+ <dt>2.6. <a href="installation.html#NOTHING">I just installed
+ Privoxy, and nothing is happening. All the ads are there. What's
+ wrong?</a></dt>
+
+ <dt>2.7. <a href="installation.html#NOTUSED">I get a <span class=
+ "QUOTE">"Privoxy is not being used"</span> dummy page although
+ Privoxy is running and being used.</a></dt>
+ </dl>
+ </dd>
+
+ <dt>3. <a href="configuration.html">Configuration</a></dt>
+
+ <dd>
+ <dl>
+ <dt>3.1. <a href="configuration.html#ACTIONSFILE">What exactly is
+ an <span class="QUOTE">"actions"</span> file?</a></dt>
+
+ <dt>3.2. <a href="configuration.html#ACTIONSS">The <span class=
+ "QUOTE">"actions"</span> concept confuses me. Please list some of
+ these <span class="QUOTE">"actions"</span>.</a></dt>
+
+ <dt>3.3. <a href="configuration.html#ACTCONFIG">How are actions
+ files configured? What is the easiest way to do this?</a></dt>
+
+ <dt>3.4. <a href="configuration.html#AEN393">There are several
+ different <span class="QUOTE">"actions"</span> files. What are
+ the differences?</a></dt>
+
+ <dt>3.5. <a href="configuration.html#GETUPDATES">Where can I get
+ updated Actions Files?</a></dt>
+
+ <dt>3.6. <a href="configuration.html#NEWCONFIG">Can I use my old
+ config files?</a></dt>
+
+ <dt>3.7. <a href="configuration.html#DIFFICULT">Why is the
+ configuration so complicated?</a></dt>
+
+ <dt>3.8. <a href="configuration.html#YAHOO">How can I make my
+ Yahoo/Hotmail/Gmail account work?</a></dt>
+
+ <dt>3.9. <a href="configuration.html#CONFIGFILES">What's the
+ difference between the <span class="QUOTE">"Cautious"</span>,
+ <span class="QUOTE">"Medium"</span> and <span class=
+ "QUOTE">"Advanced"</span> defaults?</a></dt>
+
+ <dt>3.10. <a href="configuration.html#BROWSECONFIG">Why can I
+ change the configuration with a browser? Does that not raise
+ security issues?</a></dt>
+
+ <dt>3.11. <a href="configuration.html#FILTERFILE">What is the
+ <tt class="FILENAME">default.filter</tt> file? What is a
+ <span class="QUOTE">"filter"</span>?</a></dt>
+
+ <dt>3.12. <a href="configuration.html#LANCONFIG">How can I set up
+ Privoxy to act as a proxy for my LAN?</a></dt>
+
+ <dt>3.13. <a href="configuration.html#NOSEEUM">Instead of ads,
+ now I get a checkerboard pattern. I don't want to see
+ anything.</a></dt>
+
+ <dt>3.14. <a href="configuration.html#WHYSEEUM">Why would anybody
+ want to see a checkerboard pattern?</a></dt>
+
+ <dt>3.15. <a href="configuration.html#BLOCKEDBYTEXT">I see some
+ images being replaced with text instead of the checkerboard
+ image. Why and how do I get rid of this?</a></dt>
+
+ <dt>3.16. <a href="configuration.html#SRVANY">Can Privoxy run as
+ a service on Win2K/NT/XP?</a></dt>
+
+ <dt>3.17. <a href="configuration.html#OTHERPROXY">How can I make
+ Privoxy work with other proxies?</a></dt>
+
+ <dt>3.18. <a href="configuration.html#PORT-80">Can I just set
+ Privoxy to use port 80 and thus avoid individual browser
+ configuration?</a></dt>
+
+ <dt>3.19. <a href="configuration.html#TRANSPARENT">Can Privoxy
+ run as a <span class="QUOTE">"transparent"</span> proxy?</a></dt>
+
+ <dt>3.20. <a href="configuration.html#INTERCEPTING">Can Privoxy
+ run as a <span class="QUOTE">"intercepting"</span>
+ proxy?</a></dt>
+
+ <dt>3.21. <a href="configuration.html#OUTLOOK">How can I
+ configure Privoxy for use with Outlook?</a></dt>
+
+ <dt>3.22. <a href="configuration.html#OUTLOOK-MORE">How can I
+ have separate rules just for HTML mail?</a></dt>
+
+ <dt>3.23. <a href="configuration.html#SNEAKY-COOKIES">I sometimes
+ notice cookies sneaking through. How?</a></dt>
+
+ <dt>3.24. <a href="configuration.html#EVIL-COOKIES">Are all
+ cookies bad? Why?</a></dt>
+
+ <dt>3.25. <a href="configuration.html#ALLOW-COOKIES">How can I
+ allow permanent cookies for my trusted sites?</a></dt>
+
+ <dt>3.26. <a href="configuration.html#MULTIPLES">Can I have
+ separate configurations for different users?</a></dt>
+
+ <dt>3.27. <a href="configuration.html#WHITELISTS">Can I set-up
+ Privoxy as a whitelist of <span class="QUOTE">"good"</span>
+ sites?</a></dt>
+
+ <dt>3.28. <a href="configuration.html#NO-ADBLOCK">How can I turn
+ off ad-blocking?</a></dt>
+
+ <dt>3.29. <a href="configuration.html#TEMPLATES">How can I have
+ custom template pages, like the <span class="emphasis"><i class=
+ "EMPHASIS">BLOCKED</i></span> page?</a></dt>
+
+ <dt>3.30. <a href="configuration.html#BLOCKALL">How can I remove
+ the <span class="QUOTE">"Go There Anyway"</span> link from the
+ <span class="emphasis"><i class="EMPHASIS">BLOCKED</i></span>
+ page?</a></dt>
+ </dl>
+ </dd>
+
+ <dt>4. <a href="misc.html">Miscellaneous</a></dt>
+
+ <dd>
+ <dl>
+ <dt>4.1. <a href="misc.html#SLOWSME">How much does Privoxy slow
+ my browsing down? This has to add extra time to
+ browsing.</a></dt>
+
+ <dt>4.2. <a href="misc.html#LOADINGTIMES">I notice considerable
+ delays in page requests. What's wrong?</a></dt>
+
+ <dt>4.3. <a href="misc.html#CONFIGURL">What are
+ "http://config.privoxy.org/" and "http://p.p/"?</a></dt>
+
+ <dt>4.4. <a href="misc.html#NEWADS">How can I submit new ads, or
+ report problems?</a></dt>
+
+ <dt>4.5. <a href="misc.html#NEWADS2">If I do submit missed ads,
+ will they be included in future updates?</a></dt>
+
+ <dt>4.6. <a href="misc.html#NOONECARES">Why doesn't anyone answer
+ my support request?</a></dt>
+
+ <dt>4.7. <a href="misc.html#IP">How can I hide my IP
+ address?</a></dt>
+
+ <dt>4.8. <a href="misc.html#ANONFORSURE">Can Privoxy guarantee I
+ am anonymous?</a></dt>
+
+ <dt>4.9. <a href="misc.html#PROXYTEST">A test site says I am not
+ using a Proxy.</a></dt>
+
+ <dt>4.10. <a href="misc.html#TOR">How do I use Privoxy together
+ with Tor?</a></dt>
+
+ <dt>4.11. <a href="misc.html#SITEBREAK">Might some things break
+ because header information or content is being altered?</a></dt>
+
+ <dt>4.12. <a href="misc.html#CACHING">Can Privoxy act as a
+ <span class="QUOTE">"caching"</span> proxy to speed up web
+ browsing?</a></dt>
+
+ <dt>4.13. <a href="misc.html#FIREWALL">What about as a firewall?
+ Can Privoxy protect me?</a></dt>
+
+ <dt>4.14. <a href="misc.html#WASTED">I have large empty spaces /
+ a checkerboard pattern now where ads used to be. Why?</a></dt>
+
+ <dt>4.15. <a href="misc.html#SSL">How can Privoxy filter Secure
+ (HTTPS) URLs?</a></dt>
+
+ <dt>4.16. <a href="misc.html#SECURE">Privoxy runs as a
+ <span class="QUOTE">"server"</span>. How secure is it? Do I need
+ to take any special precautions?</a></dt>
+
+ <dt>4.17. <a href="misc.html#TURNOFF">Can I temporarily disable
+ Privoxy?</a></dt>
+
+ <dt>4.18. <a href="misc.html#REALLYOFF">When <span class=
+ "QUOTE">"disabled"</span> is Privoxy totally out of the
+ picture?</a></dt>
+
+ <dt>4.19. <a href="misc.html#TURNOFF2">How can I tell Privoxy to
+ totally ignore certain sites?</a></dt>
+
+ <dt>4.20. <a href="misc.html#CRUNCH">My logs show Privoxy
+ <span class="QUOTE">"crunches"</span> ads, but also its own
+ internal CGI pages. What is a <span class=
+ "QUOTE">"crunch"</span>?</a></dt>
+
+ <dt>4.21. <a href="misc.html#DOWNLOADS">Can Privoxy affect files
+ that I download from a webserver? FTP server?</a></dt>
+
+ <dt>4.22. <a href="misc.html#DOWNLOADS2">I just downloaded a Perl
+ script, and Privoxy altered it! Yikes, what is wrong!</a></dt>
+
+ <dt>4.23. <a href="misc.html#HOSTSFILE">Should I continue to use
+ a <span class="QUOTE">"HOSTS"</span> file for
+ ad-blocking?</a></dt>
+
+ <dt>4.24. <a href="misc.html#SEEALSO">Where can I find more
+ information about Privoxy and related issues?</a></dt>
+
+ <dt>4.25. <a href="misc.html#MICROSUCK">I've noticed that Privoxy
+ changes <span class="QUOTE">"Microsoft"</span> to <span class=
+ "QUOTE">"MicroSuck"</span>! Why are you manipulating my
+ browsing?</a></dt>
+
+ <dt>4.26. <a href="misc.html#VALID">Does Privoxy produce
+ <span class="QUOTE">"valid"</span> HTML (or XHTML)?</a></dt>
+
+ <dt>4.27. <a href="misc.html#SURPRISE-PRIVOXY">How did you manage
+ to get Privoxy on my computer without my consent?</a></dt>
+ </dl>
+ </dd>
+
+ <dt>5. <a href="trouble.html">Troubleshooting</a></dt>
+
+ <dd>
+ <dl>
+ <dt>5.1. <a href="trouble.html#REFUSED">I cannot connect to any
+ websites. Or, I am getting <span class="QUOTE">"connection
+ refused"</span> message with every web page. Why?</a></dt>
+
+ <dt>5.2. <a href="trouble.html#ERROR503">Why am I getting a 503
+ Error (WSAECONNREFUSED) on every page?</a></dt>
+
+ <dt>5.3. <a href="trouble.html#FLUSHIT">I just added a new rule,
+ but the steenkin ad is still getting through. How?</a></dt>
+
+ <dt>5.4. <a href="trouble.html#BADSITE">One of my favorite sites
+ does not work with Privoxy. What can I do?</a></dt>
+
+ <dt>5.5. <a href="trouble.html#DUN">After installing Privoxy, I
+ have to log in every time I start IE. What gives?</a></dt>
+
+ <dt>5.6. <a href="trouble.html#FTP">I cannot connect to any FTP
+ sites. Privoxy is blocking me.</a></dt>
+
+ <dt>5.7. <a href="trouble.html#MACOSXIE">In Mac OS X, I can't
+ configure Microsoft Internet Explorer to use Privoxy as the HTTP
+ proxy.</a></dt>
+
+ <dt>5.8. <a href="trouble.html#MACOSXUNINSTALL">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></dt>
+
+ <dt>5.9. <a href="trouble.html#MACOSXIMAGES">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></dt>
+
+ <dt>5.10. <a href="trouble.html#MACOSXACCOUNTDELETION">I just
+ upgraded to Mac OS X 10.9 (Mavericks) and now <span class=
+ "APPLICATION">Privoxy</span> has stopped working.</a></dt>
+
+ <dt>5.11. <a href="trouble.html#BLANKPAGE">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></dt>
+
+ <dt>5.12. <a href="trouble.html#NOHOSTNAME">My logs show many
+ <span class="QUOTE">"Unable to get my own hostname"</span> lines.
+ Why?</a></dt>
+
+ <dt>5.13. <a href="trouble.html#INUSE">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></dt>
+
+ <dt>5.14. <a href="trouble.html#DEMORONIZER">Pages with UTF-8
+ fonts are garbled.</a></dt>
+
+ <dt>5.15. <a href="trouble.html#DEMORONIZER2">Why are binary
+ files (such as images) corrupted when Privoxy is used?</a></dt>
+
+ <dt>5.16. <a href="trouble.html#DEMORONIZER3">What is the
+ <span class="QUOTE">"demoronizer"</span> and why is it
+ there?</a></dt>
+
+ <dt>5.17. <a href="trouble.html#WINDOWOPEN">Why do I keep seeing
+ <span class="QUOTE">"PrivoxyWindowOpen()"</span> in raw source
+ code?</a></dt>
+
+ <dt>5.18. <a href="trouble.html#DNSERRORS">I am getting too many
+ DNS errors like <span class="QUOTE">"404 No Such Domain"</span>.
+ Why can't Privoxy do this better?</a></dt>
+
+ <dt>5.19. <a href="trouble.html#ALLCPU">At one site Privoxy just
+ hangs, and starts taking all CPU. Why is this?</a></dt>
+
+ <dt>5.20. <a href="trouble.html#SLOWCRAWL">I just installed
+ Privoxy, and all my browsing has slowed to a crawl. What
+ gives?</a></dt>
+
+ <dt>5.21. <a href="trouble.html#PREVENTCOMP">Why do my filters
+ work on some sites but not on others?</a></dt>
+
+ <dt>5.22. <a href="trouble.html#SSL-WARNINGS">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></dt>
+
+ <dt>5.23. <a href="trouble.html#SE-LINUX">I get selinux error
+ messages. How can I fix this?</a></dt>
+
+ <dt>5.24. <a href="trouble.html#GENTOO-RICERS">I compiled
+ <span class="APPLICATION">Privoxy</span> with Gentoo's portage
+ and it appears to be very slow. Why?</a></dt>
+
+ <dt>5.25. <a href="trouble.html#TAINTED-SOCKETS">What are tainted
+ sockets and how do I prevent them?</a></dt>
+ </dl>
+ </dd>
+
+ <dt>6. <a href="contact.html">Contacting the developers, Bug
+ Reporting and Feature Requests</a></dt>
+
+ <dd>
+ <dl>
+ <dt>6.1. <a href="contact.html#SUFFICIENT-INFORMATION">Please
+ provide sufficient information</a></dt>
+
+ <dt>6.2. <a href="contact.html#CONTACT-SUPPORT">Get
+ Support</a></dt>
+
+ <dt>6.3. <a href="contact.html#REPORTING">Reporting
+ Problems</a></dt>
+
+ <dd>
+ <dl>
+ <dt>6.3.1. <a href="contact.html#CONTACT-ADS">Reporting Ads
+ or Other Configuration Problems</a></dt>
+
+ <dt>6.3.2. <a href="contact.html#CONTACT-BUGS">Reporting
+ Bugs</a></dt>
+ </dl>
+ </dd>
+
+ <dt>6.4. <a href="contact.html#SECURITY-CONTACT">Reporting
+ security problems</a></dt>
+
+ <dt>6.5. <a href="contact.html#MAILING-LISTS">Mailing
+ Lists</a></dt>
+
+ <dt>6.6. <a href="contact.html#SF-TRACKERS">SourceForge support
+ trackers</a></dt>
+ </dl>
+ </dd>
+
+ <dt>7. <a href="copyright.html">Privoxy Copyright, License and
+ History</a></dt>
+
+ <dd>
+ <dl>
+ <dt>7.1. <a href="copyright.html#AEN1484">License</a></dt>
+
+ <dt>7.2. <a href="copyright.html#AEN1493">History</a></dt>
+ </dl>
+ </dd>
+ </dl>
+ </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"> </td>
+
+ <td width="34%" align="center" valign="top"> </td>
+
+ <td width="33%" align="right" valign="top"><a href="general.html"
+ accesskey="N">Next</a></td>
+ </tr>
+
+ <tr>
+ <td width="33%" align="left" valign="top"> </td>
+
+ <td width="34%" align="center" valign="top"> </td>
+
+ <td width="33%" align="right" valign="top">General Information</td>
+ </tr>
+ </table>
+ </div>
+</body>
+</html>
projects / privoxy.git / blobdiff