Web Caching and Replication

8.5. Summary

A key issue in proxy deployment is delivering client requests to the proxy. The main alternatives include nontransparent deployment, where clients explicitly send requests to the proxy, and transparent deployment, which leaves clients unaware at the IP layer of the proxy's existence.

With nontransparent deployment, the client knows at the IP layer that it speaks to a proxy and not the origin server; therefore, the client must somehow be told to communicate with the proxy. This can be achieved through explicit client configuration, an autoconfiguration file using a configured URL, or autodiscovery of the configuration file. Proxies deployed in a nontransparant manner are called explicit proxies.

Transparent proxy deployment relies ...