Making a Listen Server

Hello pals and gals! I am currently working on an MMORPG and unfortunately it’ll probably take me forever to finish it, but I was wondering if there was any way to make a Listen Server but have it be external, using the Unreal Engines built in Networking system. Basically what I mean is when I build the game and launch the game have a Listen Server also load as a separate application that I can control from the Server Machine. I’m not sure if that’s how it works in the first place or not but that’s what I was hoping to achieve while still using the built in networking. (Sorry I am a newb when it comes to networking. That’s what I have been spending most my time trying to learn)

Thanks in advance!