NAT-Router settings for server use.

[amon]

The game clearly does not work without NAT router settings in server use. The game chooses port numbers randomly. The ports range 49152-65535 must be routed to the server PC and UDP Port 27015 remains the same. These settings have been in use for a week with a broadband connection and the multiplayer server works fine.

Ship Graveyard Simulator 2 TCP and UDP port forward list (UDP ports are required, but there can also be one TCP port):
UDP port 27015
TCP and UDP ports 49152-65535

49152-65535 is dynamic, private or ephemeral port number range.

With a mobile phone connection, the server does not work because the IP number reveals the NAT routing and the settings cannot be changed. 192.168.0.0 – 192.168.255.255 range is a commonly used private NAT routing IP number range.

On the server-side NAT router is not configured correctly, if the server immediately kicks all players out. The torch breaks the multiplayer game very often. The sound of the torch remains in the background and all tools stop working.