I am trying to understand the ASA. I have seen two ASAs, a 5505 and a 5510, that block traffic when there are multiple subnets behind the internal interface. For example, the internal interface of the ASA is configured for 192.168.0.0/24. There is another router (192.168.0.254) on the subnet that acts as a gateway to another subnet, 192.168.1.0. It is possible to ping between subnets, but all other traffic fails. Why would this be? What information can I provide? All help is greatly appreciated.