Jump to: navigation, search
SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidGuard: it is fast and it is free.



Filter plugin for squid

Developer: PĂ„l Baltzersen and Lars Erik HĂ„land
License: GNU GPLv2 or later
Web: http://www.squidguard.org

Features and documentation

SquidGuard comes along with a good online documentation. So please have a look at the SquidGuard website.

Installing SquidGuard

SquidGuard needs a running Squid - so perhaps you should have a look at the Squid page bevore you proceed.

You need to adapt the file /etc/squid/squid.conf to include SquidGuard in the running squid process. For Squid version 2.5 and below, this entry looks like:

redirect_program /usr/bin/squidGuard
redirect_children 5 

With Squid version 2.6 this has changed to

url_rewrite_program /usr/sbin/squidGuard
url_rewrite_children 5

The squidGuard packages comes along with a very basic blacklist of webpages sorted in one big category: blacklist. These list is a plain text list which has to be transformed into a Berkeley DB Database bevore squidGuard works. You can do this as root with the command:

squidGuard -c /etc/squidGuard.conf -C all

Afterwards, check the ownership of the created database files in /var/lib/squidGuard/db/blacklist/: squidGuard will silently abort (with an error message in /var/log/squidGuard/squidGuard.log) and your proxy runs without filtering. As squidGuard is started via Squid, the database files should be owned by the user and group of squid. Normally this is user squid and group nogroup (you can check squid.conf for cache_effective_user and cache_effective_group). To be shure everything works as expected, enter:

chown squid:nogroup /var/lib/squidGuard/db/blacklist/*

And now you can (re-) start squid and everything should work as expected. Have a look at the logfile /var/log/squidGuard/squidGuard.log from time to time...

See also

External Links