I want to setup a 5520 on my network. The basic physical topology is
Cable modem -> router -> internal network currently.
I want to add the 5520 after the router. What is the best way to setup the ASA? Because the original default gateway (192.168.1.x) will now be on the external interface of the ASA. Should I configure the DHCP server to have a new default gateway and match it to the ASA ip for the internal interface and NAT out the rules from there? Likewise have the router pass all data to the external interface of the firewall?