BRIDGE FILTER

When several users on the same network access the Internet multiple times for the same page, you pay a price in time and bandwidth. A caching proxy reduces traffic by storing web pages requested by users and serving them on request. A caching HTTP proxy like Squid [1] runs in Layer 7 of the OSI (Open Systems Interconnection) model; in other words, the Squid proxy server speaks the application protocol and can recognize the payload data. The proxy is thus capable of checking the content of a page and providing content filtering. Depending on the target direction, a proxy can either block access to undesirable pages, such as adult content on school networks, or it can keep malware out of an enterprise network.