Last Updated 25, March 2003

How to block P2P and Chat by router

P2P and Chat program port list

P2P and Chat	Port	Destination
Gnutella	6346 6347 (udp tcp)
Kazaa	1214 (udp)
IRC	6667
Napster	8888	64.124.41.187
MSN	11295, 14753 (utp) 15203, 7760 (tcp)

Block Gnutella

To block Gnutella, you should close 6346 6347 udp tcp

I assume the network address is 202.0.0.0/28

access-list 101 deny   tcp 202.0.0.0 0.0.0.15 any eq 6346 log
access-list 101 deny   udp 202.0.0.0 0.0.0.15 any eq 6346 log
access-list 101 deny   tcp 202.0.0.0 0.0.0.15 any eq 6347 log
access-list 101 deny   udp 202.0.0.0 0.0.0.15 any eq 6347 log

Block Kazaa

access-list 101 deny   tcp 202.0.0.0 0.0.0.15 any eq 1214 log
access-list 101 deny   udp 202.0.0.0 0.0.0.15 any eq 1214 log

Block ICQ

access-list 100 deny   tcp 202.144.158.192 0.0.0.255 any eq 5190 log
access-list 100 deny   udp 202.144.158.192 0.0.0.255 any eq 5190 log

Block Napster

access-list 100 deny   tcp 202.144.158.192 0.0.0.255 any eq 8888 log
access-list 100 deny   udp 202.144.158.192 0.0.0.255 any eq 8888 log

Notice: I don't guarantee all the services above. Some may not be able to block now or the future.

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