Configure Static Routing on Cisco ASA Firewall

Networktrek

Although the Cisco ASA appliance does not act as a router in the network, it still has a routing table and it is essential to configure static or dynamic routing in order for the appliance to know where to send packets. When a packet arrives to a network interface on the ASA firewall, the packet undergoes several security controls, such as ACL filtering, NAT, deep-packet inspection etc. After the packet passes all firewall controls, the security appliance needs to send the packet to its destination address. It therefore checks its routing table to determine the outgoing interface where the packet will be sent.

Cisco ASA firewalls support both static and dynamic routing. For dynamic routing, the ASA supports RIPv2 and OSPF. I recommend not to use dynamic routing though and stick with just static routes. The reason is that one of the purposes of a firewall is to hide your…

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