How much of an impact depends on many things, including the CPU of the host system, how aggressive the configuration is, which specific actions are being triggered, @@ -120,15 +120,14 @@ TARGET="_top" >deanimate-gifs - actions will certainly cause a perceived slowdown, since the entire document + actions may cause a perceived slowdown, since the entire document needs to be buffered before displaying. And on very large documents, filtering may have some measurable impact. How much depends on the page size, the actual definition of the filter(s), etc. See below. Most other actions have little to no impact on speed.
- Also, when filtering is enabled, typically there is a disabling of - compression, (see Also, when filtering is enabled but zlib support isn't available, compression + is often disabled (see prevent-compression4.2. I notice considerable -delays in page requests compared to the old Junkbuster. What's wrong?
If you use any only knows how to differentiate filterable content because of the MIME type as reported by the server, or because of some configuration setting that enables/disables - filtering.
web site at config.privoxy.org.
With recent versions of Privoxy (version 2.9.x and - later), the user interface features information on the run time status, the - configuration, and even a built-in editor for the actions files.
Note that the built-in URLs from earlier versions of Junkbuster - / Privoxy, http://example.com/show-proxy-args and http://i.j.b/, - are no longer supported. If you still use such an old version, you should really consider - upgrading to 3.0.6.
Please see the 4.5. If I do submit missed ads, will -they be included in future updates?
Whether such submissions are eventually included in the 4.6. Why doesn't anyone answer my support -request?
Rest assured that it has been read and considered. Why it is not answered, could be for various reasons, including no one has a good answer for it, no @@ -340,8 +317,8 @@ CLASS="SECT2" CLASS="SECT2" >4.7. How can I hide my IP address?4.7. How can I hide my IP address?
If you run both the browser and However, these proxies are called "anonymous" because you don't need
- a password, not because they would offer any real anonymity.
+ to authenticate, not because they would offer any real anonymity.
Most of them will log your IP address and make it available to the
authorities in case you violate the law of the country they run in. In fact
you can't even rule out that some of them only exist to *collect* information
@@ -385,7 +362,8 @@ TARGET="_top"
>How do I use Privoxy together with together
+ with Tor section No. Your chances of remaining anonymous are greatly improved, but unless you
Most of Privoxy's protection can be easily subverted
+> privacy-enhancing features can be easily subverted
by an insecure browser configuration, therefore you should use a browser that can
be configured to only execute code from trusted sites, and be careful which sites you trust.
For example there is no point in having Good! Actually, they are probably testing for some other kinds of proxies.
Hiding yourself completely would require additional steps. Before you configure Privoxy to use Tor
- ( to use
+ http://tor.eff.org/),
+>Tor,
please follow the User Manual
If it is, refer to Tor's
extensive documentationTor This is enough to reach the Internet, but additionally you should
+> This is enough to reach the Internet, but additionally you might want to
uncomment the following forward rules, to make sure your local network is still
reachable through Privoxy: Unencrypted connections to systems in these address ranges will
be as (un)secure as the local network is, but the alternative is
- that you can't reach the network at all.
- If you also want to be able to reach servers in your local
- network by using their names, you will need additional
- exceptions that look like this: If you want your browser to be able to reach servers in your local
+ network by using their names, you will need additional exceptions
+ that look like this: Definitely. It is common for sites to use browser type, browser version,
HTTP header content, and various other techniques in order to dynamically
@@ -737,14 +712,11 @@ content is being altered? The "User-Agent" is often used in this way to identify
- the browser, and adjust content accordingly. Changing this now (at least not
- further than removing the OS information) is not recommended, since so many
- sites do look for it. You may get undesirable results by changing just this
- one aspect. Also, different browsers use different encodings of Russian and Czech
characters, certain web servers convert pages on-the-fly according to the
@@ -796,21 +768,26 @@ CLASS="SECT2"
> No, it does not have this ability at all. You want something like
Squid for this. And, yes,
- before you ask, or
+ Polipo for this.
+ And, yes, before you ask, Privoxy can co-exist
@@ -835,17 +812,17 @@ CLASS="SECT2"
> Not in the way you mean, or in the way a true firewall can.
+> Not in the way you mean, or in the way some firewall vendors claim they can.
Privoxy can help protect your privacy, but not
- protect you from intrusion attempts. It is, of course, perfectly possible
- and recommended to use can help protect your privacy, but can't
+ protect your system from intrusion attempts. It is, of course, perfectly possible
+ to use It is technically possible to eliminate banners and ads in a way that frees
their allocated page space. This could easily be done by blocking with
@@ -897,9 +874,9 @@ CLASS="SECT2"
> Since secure HTTP connections are encrypted SSL sessions between your browser
and the secure site, and are meant to be reliably There are no known exploits that might affect
- Privoxy. On Unix-like systems,
- On Unix-like systems, Privoxy can run as a non-privileged
- user, which is how we recommend it be run. Also, by default
+ user, which is how we recommend it be run. Also, by default
Privoxy only listens to requests
- from listens to requests from "localhost" only. The server aspect of
-
+ only. The server aspect of Privoxy is not itself directly exposed to the
- Internet in this configuration. If you want to have
+> is not itself directly
+ exposed to the Internet in this configuration. If you want to have
Privoxy4.17. How can I temporarily disable Privoxy?4.17. How can I temporarily disable Privoxy? The easiest way is to access 4.18. When "disabled" is Privoxy totally
-out of the picture? No, this just means all filtering and actions are disabled.
+> No, this just means all optional filtering and actions are disabled.
Privoxy4.19. How can I tell Privoxy to totally ignore certain sites?4.19. How can I tell Privoxy to totally ignore certain sites? Bypassing a proxy, or proxying based on arbitrary criteria, is purely a browser
configuration issue, not a 4.20. My logs show Privoxy "crunches""crunch"?? A "crunch". Since version 3.0.7, Privoxy will also log the crunch reason.
+ If you are using an older version you might want to upgrade. From the webserver's perspective, there is no difference between
viewing a document (i.e. a page), and downloading a file. The same is true of
@@ -1193,7 +1169,7 @@ CLASS="APPLICATION"
> knows the differences in files according
to the "Document Type""Content Type" as reported by the webserver. If this is
reported accurately (e.g. In short, filtering is "ON" if a) the Document Type as reported
+> if a) the content type as reported
by the webserver is appropriate "bad". It's the configuration that let's it all happen or not. If you download text files, you probably do not want these to be filtered,
particularly if the content is source code, or other critical content. Source
@@ -1278,9 +1254,9 @@ CLASS="SECT2"
CLASS="SECT2"
>4.22. I just downloaded a Perl script, and Privoxy
-altered it! Yikes, what is wrong! Please read above. One time-tested technique to defeat common ads is to trick the local DNS
system by giving a phony IP address for the ad generator in the local
@@ -1323,8 +1299,8 @@ CLASS="APPLICATION"
CLASS="FILENAME"
>HOSTS file, in fact, not only
- duplicates effort, but may get in the way. It is recommended to remove
- such entries from your HOSTS file. If you think
@@ -1361,9 +1337,9 @@ CLASS="SECT2"
CLASS="SECT2"
>4.24. Where can I find more information about Privoxy
-and related issues? Other references and sites of interest to http://www.squid-cache.org/, a very popular
+>, a popular
caching proxy, which is often used together with Privoxy We're not. The text substitutions that you are seeing are disabled
in the default configuration as shipped. You have either manually
@@ -1665,6 +1669,29 @@ CLASS="QUOTE"
> profile in the
web-based editor. Please upgrade! Privoxy generates HTML in both its own "templates", and possibly
+ whenever there are text substitutions via a Privoxy filter. While this
+ should always conform to the HTML 4.01 specifications, it has not been
+ validated against this or any other standard. 4.8. Can Privoxy guarantee I am anonymous?
4.8. Can Privoxy guarantee I am anonymous?4.9. A test site says I am not using a Proxy.
4.9. A test site says I am not using a Proxy.Tor
Faq 4.2
+ 4.11. Might some things break because header information or
-content is being altered?
4.12. Can Privoxy act as a "caching" proxy to
-speed up web browsing?
4.13. What about as a firewall? Can Privoxy protect me?
4.13. What about as a firewall? Can Privoxy protect me?4.14. I have large empty spaces / a checkerboard pattern now where
-ads used to be. Why?
4.15. How can Privoxy filter Secure (HTTPS) URLs?
4.15. How can Privoxy filter Secure (HTTPS) URLs?4.16. Privoxy runs as a "server". How
-secure is it? Do I need to take any special precautions?
http://www.pps.jussieu.fr/~jch/software/polipo/,
+ Polipo is a caching proxy with advanced features
+ like pipelining, multiplexing and caching of partial instances. In many setups
+ it can be used as Squid replacement.
+ http://tor.eff.org/4.25. I've noticed that Privoxy changes "Microsoft""MicroSuck"! Why are you manipulating my browsing?! Why are you manipulating my browsing? 4.26. Does Privoxy produce "valid" HTML (or XHTML)?