I just came into configuration of Zone based firewall. There is a built-in Self Zone when you configures the zones on the firewall. My questions is: What is the Self Zone? What is the purpose of having Self zone in the Cisco IOS Router for zone based...

I have a Cisco Integrated Service Router 3825. It has three physical interfaces(GigbitEthernet0/0, GigbitEthernet0/1 and one SFP ), I would like to use three interfaces at the same time as a firewall to build three zones(Inside, DMZ and Internet) eac...