How to Block Torrents on Router 3845

[qasimkhans]

i am trying to block torrent on cisco Router 3845 using NBAR but it is not blocking torrents. how can i block it properly. my NBAR config is as below. 

class-map match-any p2p
 match protocol bittorrent
 match protocol edonkey
 match protocol fasttrack
 match protocol gnutella
 match protocol kazaa2
 match protocol winmx
 match protocol blizwow
 match protocol fatserv
 match protocol gopher
 match protocol kali
 match protocol Konspire2b
 match protocol youtube
!
!
policy-map p2p-Drop
 class p2p
  drop

interface GigabitEthernet0/0.4
 description Servers-&-Switches-Vlan
 encapsulation dot1Q 4
 ip address 192.168.4.1 255.255.255.0
 ip nbar protocol-discovery
 ip nat inside
 ip virtual-reassembly in
 ip policy route-map PBR

service-policy input p2p-Drop

[Reza Gorjizadeh]

unfortunately with new bittorrent clients it's not easy to block all bittorrent traffic. you can try new NBAR PDLM's for bittorrent from Cisco Downloads and see if it can detect new bittorrent clients Traffic.

[qasimkhans]

is there any way we can block torrents softwares?  like their ports block in ACL?

[Reza Gorjizadeh]

New Torrent Clients can tunnel bittorrent traffic through HTTP and it makes them harder to block ,

you can create a whitelist of your common internet traffic ports , and  rate limit rest of the ports