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New Member

How to Block Torrents on Router 3845

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


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

service-policy input p2p-Drop

New Member

unfortunately with new

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.

New Member

is there any way we can block

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

New Member

New Torrent Clients can

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