I have received great responses before and I appreciate all the great help! I would like to hookup a 2600 router ahead of our firebox for QoS purposes. Our link is a T1 and we do video conferencing. I'm comfortable setting up the QoS parameters but I having difficulty in getting the router and firebox to talk to each other. Here is the configuration.
Internal trusted: 192.168.100.x
Externa Interface: 69.x.x.122
Optional Interface: 172.16.168.x
Nat is turned on for the 192.168.100 network.
Cisco 2600 Router:
2 Fa interfaces.
Note: I do have another external IP address available from the ISP. 69.x.x.124
Thanks for the help.