Hi Niels,
Is there any possibility to tell the ssh-daemon on which port he should reply to the client ???
--> I think you have misunderstood how the SSH protocol works. Remote host: The sshd server is listening on port 22 (you can use "sshd -p xxx" to specify a different port) Client host: The ssh client connects from a port > 1024 on the local machine to port 22 on the server. If you have multiple ssh connections, they all start on a different LOCAL port but end on port 22 of the server. You can use "ssh -p xxx" if the server is not listening on port 22. You should restrict the sshd server to accept connections only from selected IPs by entering them in /etc/hosts.allow Alternatively or in addition, you can add them SSHD configuration file /etc/sshd/sshd_config (see "man sshd_config"). HTH, Armin