Underlords dedicated server

[uaspro]

Your system information

• Have you checked for system updates?: [Yes]
• Are you using the latest stable video driver available for your system? [Yes]
• Have you verified the game files?: [Yes]

Please describe your issue in as much detail as possible:

I'm trying to setup my own underlords dedicated server locally to be able customize some game parameters and play the game with my friedns to have some fun, but I ran into a problem with server accessibility.

Since underlords game based on Source2 engine, I expected hosting a server to be more or less straightforward and similar to CS2 dedicated server setup.

So, I've tried to start the server with next parameters:

"underlords.exe" -dedicated +map <empty> +maxplayers 32 -sv_lan 0 -port 27015

But when someone is trying to connect my server - nothing happens in the game and in the server logs I can see the message:

[U:1:XXXXXXXXX] attempting to join the server but is not allowed onto the server
OnSteamNetConnectionStatusChanged [#1234567890 UDP steamid:XXXXXXXXXXXXX@12.34.56.78:57957] Closed hconn=3248348333, old state=1, listensocket=65536 )

I've spent few days searching any bits of information that can be useful and adjust server startup parameters in many possible ways, based on how other people configure l4d / cs / tf2 servers, but with no luck.

Also, I was not able to get more detailed logs from the server on this problem to help debug the issue.

I have port forwarding correctly configured on my router, because I've previously hosted CS2 server for my friends, before it was possible in the game.

I know that the game is kinda outdated and not supported by Valve anymore, but I would really appreciate any input that might help me to figure out the solution.

Steps for reproducing this issue:

1. Start underlords.exe in dedicated server mode.
2. Try to connect to the server from in-game console (vconsole).
3. Connection failed.