Girovagando for the net me is imbattuto in a post most interesting who explains as to install squid proxy server on ubuntu and obviously I have quickly tried:

1. From finishes typing they apt-get install squid.
2. To open gedit /etc/squid/squid.conf.
3. To find the TAG: visible_hostname and to add visible_hostname <hostname> where <hostname> it is the name host of the computer.
4. To control that door HTTP is set up to 3128.
5. To save and to close.
6. To type adduser squid and to specify a password.
7. To type /etc/init.d/squid restart.
8. To stop I torture with /etc/init.d/squid stop.
9. To test the service in debug mode typing squid - z (creates the cache).
10. To type squid - NCd10.
11. To open Firefox to the address localhost: 3128.
12. If all it is to place to exit from the way debug with CTRL-C.
13. Launch /etc/init.d/squid star.
14. In order to shape Firefox with squid going on Modifica->Preferenze to cliccare on Advances.
15. Rete>Impostazioni and manual Configurazione of the Proxy. In Proxy HTTP, to insert localhost and on door 3128.

It marks it near: