Squid Proxy is  a a great proxy server mainly used for caching frequently requested web content in order to speed up response time and also save network bandwidth. It supports many different protocols such as HTTP, FTP, TLS, SSL, Internet Gopher and HTTPS. Although it was originally designed to run as a daemon on Unix-like systems there have been several ports to windows, but according to wikipedia more current versions are not being developed.

Squid Proxy is released under the GNU General Public License.

In this tutorial you will learn how to install and setup Squid Proxy on Ubuntu and Debian Linux distributions. Just follow each step of this guide carefully and everything will be ok.

Full article here:
How To Install And Configure Squid Proxy On Ubuntu And Debian (Unixmen)