Although you can block p2p on the router but the application layer blocking is limited on the router may a firewall better to
Some extent buy the best way for this
Type of filtering us to use s proxy server with web filtering
So with the router nbar works on l7 and you can
Monitor ur network and c which p2p is being used and create a custom nbar class to block it
Also try to use zine based firewall on ur router which gives u more flexible
policies
Wish this helps
If helpful rate
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