Cisco ASA Configure Default Gateway

The default route is used to forward the traffic to a specific location that has no routing information in the routing table. Generally, it is used for internet access configuration. Because it is not possible to enter the routing entry for all the servers that are available on the internet.

In this tutorial, we will learn how to add a default route entry in the Cisco ASA firewall.

To add the "Default Route" or the "Default Gateway" expand the "Routing" configuration tree. You can reach it from the "Device Setup" option of the "Configuration" menu. Then click on the "Static Routes" option. Then click on the "Add" button to add a new static entry.

Now select the "IPv4" radio button from the "IP Address Type" section. In the "Interface" field, select your "Outside" interface from the drop-down list. Now write your network address in the "Network" field. Here, we will write 0.0.0.0/0 as the network address this will be our default route entry. Or you can use the "any4" value from the list. Now write your gateway IP address in the "Gateway IP" field. We will get this gateway IP address from our internet service provider. We assume that our gateway IP address will be 5.5.5.5. Finally, click on the "OK" button to add this route entry as well as close this window.

That's it. We can add multiple default routes by changing its "Metric" value.