[WBEL-users] ssh, root, and remote backups

[James Knowles]

>Looks pretty secure to me...but I also have a special ssh key on remote
>root account, which is restricted to the IP of the host initiating the
>backup and to the command which is produced by rsync on remote side.
>  
>

Ahhh... very clever. I didn't know that you could do that.

Google found some step-by-step articles right off the bat.

This one assumed little prior knowledge, which helped me grasp what's 
going on:

http://www.hackinglinuxexposed.com/articles/20030109.html

ssh keeps revealing more surprises over time. It's quite a piece of work.