Push backup's failing with Error. rsync: connection unexpectedly closed

Error from the email notification for a failed backup:

Error: rsync over ssh connection failure: 3:Child PID 5403 exited with status 65280
rsync: connection unexpectedly closed (0 bytes received so far) [sender]rsync error: unexplained error (code 255) at io.c(600)

Solution : This could happen if our server that handles push backup's can't establish a connection with your SSH host. The reason for connectivity issue could be firewall rules on your side. Please make sure to allow (white-list) the IP 208.87.11.77 of our push backup server at your end to resolve the issue.