I'm not sure if DPI would help much if the torrent connections are all encrypted. Perhaps you could do something by profiling connections, for example if a par

I'm not sure if DPI would help much if the torrent connections are all encrypted. Perhaps you could do something by profiling connections, for example if a particular computer has a large amount of connections open to a large number of IP addresses. But then again in theory you don't have to download very much to trip over this, downloading 6 separate 4MB MP3 files could do it if you are very unlucky. The only thing I can think of would be to run everything through an HTTP proxy and then explicitly whitelist IP addresses of individual websites as and when you need them. Of course this would break stuff like XboX games and any legitimate use of P2P networking.