We have a PIX 515E connected externally to a managed Cisco 3600 router. Currently, the outside interface of the PIX is configured on network 12.37.112.144 mask 255.255.255.240. We asked for additional IP addresses from our ISP, and they gave us a range on network 12.161.118.64 mask 255.255.255.224. Both ranges are setup on the same 3600 router. Default route on the PIX is set to 12.37.112.145. I know that the PIX can only have one default route, so how do we get it to talk to the router address (new default route) on the new range? Currently, IP addresses in our DMZ are static NAT'ed to addresses in the 12.37.112.x range. We need to be able to make those DMZ hosts available on addresses on both ranges at the same time, so that when we make DNS changes to transition to the new IP range, the hosts will be available on the old and new IP addresses during DNS updates. We will eventually stop using the 12.37.112.144 network.
Thanks in advance for your help!
Thanks in advance for your help!