Cannot get past realm selection on non-localhost computers

[ShadowWizard]

Ok, first off, I am super new to all this, and honestly don't know much at all. I have set up a server for fun once following a tutorial, and have set it up again, but its acting funny. Here's whats going on.
Machine A is running the server. If I load the client on machine A, I am able to login, and it doesn't even ask me to choose a realm. It just puts me to the character selection screen. However, if I load the client on machine B, I am able to login, however as soon as I do it asks me to select the realm. When I select a realm, it asks me to select a realm again. When I select a realm, it asks me to select a realm again.. and so on.
Both machines are using the same client (Quite literally, its a shared folder) so I know its not corrupted files in the client directory, but other then that, I have no idea what is going on.
Can I get some insight please? Thanks.

[stoneharry]

What emulator are you using?

Your realmlist will be set to localhost (127.0.0.1) or your external IP, neither of which the computer on the same network can connect to. He must connect to your internal IP, and a realm must be set up to point to the computers internal IP rather than localhost (a second realm display pointing to the same world).

More details can be found here: Arcemu Use Cases - ArcEmu-Wiki

[ShadowWizard]

Yes, I did some more poking and realized there were 2 config files, not just one (Well, several, but two that need the IP addresses changed in)
Thank you anyway for the reply.