Two servers on one port 443

I have 2 servers.

One is an ISA server listening for port 443 to forward to exchange OWA.
The the other is a web server that I want to use SSL on.

My problem is that I cannot forward port 443 to 2 different IP address.
I tried to create a different web listener but I get an error message that says I cannot use the same port(443) twice.

What can I do to make this work, besides changing my external IP?

Thank you!
Who is Participating?
Keith AlabasterEnterprise ArchitectCommented:
Can't be done unless:

both web sites are on the same server so you can use host headers
or you have a second external ip address on the ISA external nic
stupid copy and paste.

This is what I meant to type:

Configure two secure web publishing rules. Configure one to listen for the URL that users will go to for Web Server One and configure the other publishing rule to listen for the URL of server two.
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Toni UranjekConsultant/TrainerCommented:
I was typing this answer:

"Can not be done without second IP. If Keith responds after me you should accept this answer!"

I've got distracted because of unfortunate Conficker virus, but as I understand, points go to Keith? Now I'm puzzled, I can use host headers? On ISA 2004? I will submit my own question. ;)


junglecomAuthor Commented:
Actually I was right cause I said "besides changing my external IP". But I'll give it it to you both. More to keith for being first.

Luckily I had an extra external IP laying around so I just have to make sure I change my DNS records to resolve to the new external IP of the webserver.

Thanks guys!
Keith AlabasterEnterprise ArchitectCommented:
If toniur wants the points that badly then let him have them. I certainly don't need any more.

toniur - what are you puzzled about? Of course you can use host headers - what does it matter if it is isa2004 or isa2006, the same can be done for both versions. If you have two web sites on ONE web server it will have only ONE internal ip address therefore the ONE web listener for port 443 can operate and host headers will identify which of the two web sites it will hit - obviously you need to have the right types of certificate. if they have the same this will work fine.

Basic ISA functionality.
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