I am trying to understand the ASA 5520 and the PIX 525 firewalls. If I have two or more networks physically attached to the firewall ports will I be do routing with OSPF between them? Would I configure this the same way through the IOS as if I were working on a router? Thanks for your help. I am just trying to understand if I will need a router and a firewall or if I can get away with only using the firewall.