Proxy servers

Hello,

I am developing a Proxy server application for a final year project and just wondered if anybody could point me in the direction of some good technical data on the way they work.
thanks,

www.howstuffworks.com ??

http://www.google.com/search?q=how+d...utf-8&oe=utf-8

For all things internetworking, you need an RFC
http://www.rfc-editor.org/