Hi,
i fixed the problem, that my server isn´t available from outside, i just forgot one udp port.
I can´t start Steam, cause its just a shell. Its a Linux - Server.
I can start steamcmd and login but this doesn`t affect the login issue.
After all, it's okay, when the server is not listed in steam.
Intention was a private server for friends, but if someone have solution, that would be fine.
Thanks alot!