BT supplied 2701HGV - block P2P traffic

Hi all,

Is there a way to block peer to peer traffic on these routers? Specifically, it's xtorrent traffic that I want to stop.

The in-built firewall options seem a bit over simplistic. I can see one option that would block xtorrent, but it also blocks SSH and a vodafone sure signal, both of which are required.

Any pointers would be appreciated.

Thanks.