I wonder here if somebody encountered some challenges with docker networking and connectivity to the teeworlds master servers? It's possible to have my server open in the wild and connect to it but the registration to the masterserver somehow fails, claiming I need to open ports/configure my firewall for UDP and port 8000. It's the same port I used to connect to the server so I'm a bit puzzled.
@Dune yessir. I changed it to external: 8000 and internal 6000. Using the sv_port 6000 and sv_external_port 8000 didn't help. I have everything setup in a docker swarm infrastructure and my network is overlay. That might causes some issues because it's doing some NATting behind the scenes..