How to block P2P and Chat by router

Here are some basic Guides in blocking ports in Cisco Router

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 logaccess-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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