I would install l7-filter to block P2P torrent, First of all , I have a linux debian. I installed by the below command
apt-get install l7-filter-userspace
And then run command
iptables -I FORWARD -m layer7 --l7proto bittorrent -j DROP
but face with the error:
iptables v1.4.14: Couldn't load match `layer7':No such file or directory
Try `iptables -h' or 'iptables --help' for more information.
I really don't know what extra should I do ?