fastforward

"Fast Forward belongs to a class of programs known as proxy servers. Its job is to accept TCP or UDP connections on one address and port, and forward them off to some other address and port. There are lots of programs around that do this, but Fast Forward provides simplified configuration, uses less memory, and is generally faster than any other solution we know of. It uses zero-forking technology to keep its resource usage to a minimum while still running faster than most other proxies."(Description on rpmfind.net)