The new cobbler (2.x) uses rsyncd for replication with the native
rsync protocol I thought. Michael mentioned removing support for rsync
over ssh due to key problems. You can control the user that is ran on
the remote side by changing the rsyncd.conf template. Forgive my
ignorance, but does cobbler 2.x support replication over rsync/ssh?
I would have thought so, the piece of code that's responsible for
syncing is still there...
Using native rsyncd will impose additional problems, like rsync port
being blocked on firewalls, whereas SSH is usually open. I think
rsync/ssh should remain available as an option.