I have a customer who has a T1 coming into a 1605 with only one Routable IP address. The current config has only the 1605 with a public address on Serial0 and a 10.1.1.1 on Ethernet0. Serial0 is the NAT address. I want to put a PIX behind the 1605 and remove NAT (let the PIX handle the NAT). I have done this with 2 routed addresses, but not with only one. Is this possible?
Again, I want to end up with T1<->1605<->PIX<->Internal network.