Other people can't see my server

Hey guys,
i just ordered a rust server and its online for about 2 hours.
But the problem is that my friends can only connect with the direct console command.
No one is able to see my server in the server list. When my friends playing on it you can’t
see it in under “friends” or connect via steam friends list.

Does anyone know how to fix this problem?

Regards
3ndgegner