Jeremy Davis's picture

The warning/error when you try to reconnect is one I've had before, but it has only been when I reuse an IP address for a new server (which already had been added to known hosts). That can be resolved by editing the known hosts file and removing the offending entry (will be the last one if you only just set it up).

But why it connects initially and then drops out like that I have no idea... AFAIK there should be an SSH log too (in /var/log).