When I tried to log into my remote Ubuntu server today, I got:
ssh: connect to host <ip> port 22: Connection refused
So I rebooted the server, thinking sshd might have crashed.
After the boot I could connect via ssh, but after 1 or 2 minutes the server closed the connection:
Connection to <ip> closed by remote host.
Trying to reconnect, the server refuses the connection again.
didn't help, /etc/hosts.deny seems ok.
This is extremely annoying, since I have so little time to diagnose or fix the problem. Help or ideas are greatly appreciated!