A Three-Party HTTP Proxy to Support Internet Content Regulation

From 1st January 2000, Internet Service Providers in Australia have been required to filter web traffic content. The Australian Broadcasting Authority (ABA) publishes a list of banned web sites and ISPs must enforce this ban. Enforcing Internet content regulation is a security issue: ISPs need to be able to verify the authenticity of a distributed banned list, enforcement will most likely be performed by a security component, and enforcement must be integrated with other security functions. This paper examines these issues, and more specifically reviews the modifications required to the TIS http-gw proxy to support Internet content regulation.