inside-server-outside with bandwidth limitation

i already posted that in the general-general-forum...

i life in a studenthouse with a internal network and a shared connection to the internet with a linux-pc as gateway/firewall. because of a *small* bandwidth-problem we need to limit p2p.

i thought of a server installed on that linux-box as the only way out. everyone inside just connects to that server and can share files with everybody inside AND outside the firewall.

we could install limewire on that linux-box, so that internal downloads are more often, but that would not solve the overall bandwidth-problem.

one reply mentioned reflector, some kind of proxy/server, but the site has ceased operations.

thanks for any suggestions...