Netplay stuck on "Starting..."

[nogarcia]

I've been trying to get smw-server to work for quite some time, and it works just fine for LAN play. However, this particular setup doesn't seem to work.

I have the server set up and exposed to the public (12521/UDP,) and I have two users: one on LAN (me) and one from outside my network. I'm able to create a room, and we're both able to join it, but pressing "Start" just hangs. Nothing changes on their end. I've confirmed that the server and the client have the same versions: the latest continuous commit.

The full console log is in this Pastebin.
The serverlog.txt is in this one.

(The other user may not be receiving the game start message due to the Windows Firewall, but they say they've turned it off.)

[mmatyas]

Could you try also forwarding the 12522 UDP port for both players? This is where the game clients communicate with each other. (Yeah, this part is indeed not documented)