Configuring Linux and Squid as a Web proxy

SecurityFocus.com has the how-to article. “A web proxy server is a useful service to have on your network, or between your network and the Internet, as it provides an extra
security layer that insulates your users from the Internet. A proxy server can also act as a cache, allowing users to share downloads
transparently and speeding up Internet access, especially for frequently-used files. Squid is a high-performance and relatively secure
web proxy server that includes good caching facilities. It is one of the most commonly used proxy servers on the Internet.”