I have a site-to-site vpn with two 2811 Cisco Routers with 2 interfaces each
(LAN and WAN) and a GRE Tunnel.
I want to implement Zone Based Firewall and I have read several configurations to block P2P and Instant messaging, but each of them is for a specific applications, and I'd like to know if there is a way to block all of them or I have to block each individual protocol.
Best regards