Multiple IP Assignments on Cisco ASA 5505
Posted on 2011-04-22
I have a client that has a Cisco ASA 5505. They currently have a /30 assignment from their ISP, which is giving them one public IP. They have some things that depend on that IP remaining the same, such as a site-to-site VPN and various NAT rules that are in use.
They have new two devices that they are putting inside their network now that need to be accessible from the outside, with each on its own public IP addresses. We can't just use PAT for these and stick them on different ports on the existing public IP, as whatever is going to connect to them (not sure if it is software or hardware of some kind) will not allow different ports to be specified.
The ISP has given them an additional block of network addresses to accomplish this, a /29 block. This is a totally separate block from the preexisting /30, with its own default gateway as well. I need to somehow configure the ASA to use both of these networks. I can’t just cut over everything that was on the /30 to the /29, as I don’t know who all is relying on that public IP remaining the same.
I can't figure out how to configure the ASA to work with both of these networks at once. Does anyone have any suggestions?