I have a Cisco ASA5510 and articles related to ASA and mulitple Public IP says this cant be done. My question is how to best solve a scenario like this:

I have 3 zones, Outside, Inside and DMZ

• Outside is Internet
• Inside is Client machines
• DMZ is a zone for servers related to external and internal services.

My scenario is a bit more complex, but to keep things simple this will do:

I want to place an Exchange server and a web server (externally reachable in the DMZ zone)

The webserver uses both TCP80/443, the Exchange server uses 443

So to the problem: With the ASA only having one public IP, how would you make a DNAT to port 443 on both the internal hosts behind 1 Public IP? Usually, when i do this kind of scenario With Linux boxes i use alias Interfaces like eth0:0, eth0:1 and set 1 Public IP on each.

To me this must be a pretty common scenario, any ideas on how to solve it With ASA?

/KGDI