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I'm trying to control access to BitTorrent in my network. Presumably the best way to do this is using the router, a Netgear DG834GV.
I've set up a custom service that covers TCP ports 6881 - 6999 (port numbers from here). I've set up an Outbound Services filter that says "Block always".
Yet when I then start my test torrent (http://releases.ubuntu.com/9.10/ubuntu-9.10-server-i386.iso.torrent), the system is downloading the file regardless.
Is there some terribly obvious step that I might be missing here, that might account for the issue? Are there some other ranges that I should be blocking instead, maybe? Or maybe I just need to wait longer for the change to propagate before it will work?
Take a look at a 7-layer inspection/enforcement device, Packeteer, Palo Alto, but it's going to cost you. – SpacemanSpiff – 2010-12-18T13:51:49.783
+1 bittorrent can go via pretty much any port, only way to block it is to deny everything other than what you need or get a router that supports P2P filtering... but encryption can get round that. Hard one... – William Hilsum – 2010-12-18T14:29:06.280
Late to the party, disable UPNP in the router, this way the BT client cannot automatically configure port forwarding, then set a good password on the router. Not 100% but will make downloading with BT painfully slow if not useless. Be sure to delete any ports forwarded already. – Moab – 2011-03-27T16:04:49.047