UserPortal external certificate

Hello,

I am using a split-dns construction. This means I have local addresses and an external address. (DNS)

Importing the WebAdmin CA doesn't give any problems. But now the other side: WebAdmin and UserPortal are using the same certificate. The WebAdmin is meant and will be only used in the internal network. But the UserPortal is meant to be used everywhere.

Therefore it is coupled to an external domain: "asg.domain.com". But, when I open that link, I got a SSL error. The hostname is only for the internal WebInterface. Correct!

Since the UserPortal uses a different port from WebAdmin, I can't get why it is so hard to set another certificate on this one. I want the clients to connect to this domain anywhere they are, without getting a certificate issue.

So, is it possible to use a different certificate for the User Poral?

Thanks for the advice!