Securely backing up Linux machines to NAS?

[gruntly-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org (Theodore Ruegsegger)]

On Fri, Sep 11, 2009 at 10:41 PM, Scott Ehrlich <srehrlich-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
> So what are the simplest options to back up the Linux hosts? ? rsync
> does come to mind, but how to do so securely from each host? ? I'd
> consider something via ssh, but that would mean an interactive login,
> and encrypting individual files on the hosts is not an option.

Use keychain to manage your ssh keys on each host so you can run from
a cron job, no interaction required. I wrote some notes on using rsync
and keychain a while back--they describe backing up home boxes but I
used the same system to back up servers at work.

http://www.tux.org/~tbr/rsync/

HTH,
Ted Ruegsegger