Cannot join to Server (Unraid Docker)

[GeneralHaribo]

Hey There!

Recently I built a small IT and run it with Unraid, as I want to run a few services as Docker, as well as the Rust server.

After I downloaded and started the Docker container, I opened the port in my firewall.

Now I tried locally to the game server with F1 / client.connect IP:port and press Enter.

After a few seconds it says "cannot connect" and I don't understand why. Does something come to mind what I could do wrong?

Try to join the server from the client:

Server Logs:

Regards,
General Haribo

PS: I'm still a little greenhorn here and hope to get more know how :-)