Sorry for the confusing title, but here's what I want to do.
Ok let's say I have Apache Webservers on 2 different machines within my network, we'll call http://outterABC.com(this is the ServerA machine) and http://myinternalWebStuff.com(this is the ServerB machine).

I have http://outterABC.com setup at dyndns.org to point to my modem at home, and my router forwards Port 80 to the ServerA Machine (i.e. 192.168.0.3). I can access my webpage I setup for the Server A Machine.

But what I want to try and do is somehow access my ServerB machine's website that is on my same network. I tried something like this http://ServerB.outterABC.com and the apache page came up with something like the page wasn't available.

I want to access the content of the ServerB website, but because I have only one router, i can only forward Port 80 site traffic to my ServerA machine's website. I'm sure it's a different syntax I should use but i'm just not sure what I should enter to bring up the apache root web page for the Server B website via http://outterABC.com

I tried setting up DNS A records on ServerA, but I don't think it will work with what i'm trying to do above.

Again, i'm trying to just access the ServerB machine within the ServerA website address.
Thanks

You will only be able to port forward to one server behind the firewall, unless you only ever want to access the B server from a small number of external hosts. If so, you could use forwarding rules that qualify against the client IP. Alternatively, you could forward other external IP port(s) to the B host. Ports 8000 and 8080 are somewhat of a convention for this. To access the B server from the internet, you would simply use a URL like 'http://myinternalWebStuff.com:8080'.
--- rod.