Is there a tutorial on how to setup your own server?

Technical Support & Bugs
1

Just in case, Vassal servers goes offline.
I recently installed openfire to make my PC a Jabber server.

2

Thus spake digicube:

Just in case, Vassal servers goes offline.

No, because there’s no straightforward way to do this with the current
game server and clients. There will be for V4.

–
J.