The main Squid configuration file is
/etc/squid3/squid.conf, and the default Ubuntu configuration file is full of comments to help guide you. The default configuration file allows full access to the local machine but denies the rest of your network. This is a secure place to start; we recommend you try all the rules on yourself (
localhost) before rolling them out to other machines.
Before you start, open two terminal windows. In the first, change to the directory
/var/log/squid3 and run this command:
matthew@seymour:~$ sudo tail -f access.log cache.log
That reads the last few lines from both files and (thanks to the
-f flag) follows them so that any changes appear in there. This allows you to watch what Squid is doing as ...