kprop with multiple or NATted IP address

[Russ Allbery]

Jerry Shipman <jes59 at cornell.edu> writes:

> It’s me again, who was trying to kprop through a NAT a month ago.

> Hypothetically speaking… how bad of an idea would it be to make a cron
> job that `scp`s the database file to the slave KDC, or something like
> that? Does the slave KDC daemon need to restart after the file is
> updated, maybe? Or is this significantly less safe than using kprop? I
> think I would be relying on ssh instead of kerberos for the
> confidentiality and integrity. But I do that whenever I log into the
> machine anyway. I think I may risk getting the file in the middle of a
> write (so some records could be corrupted in the copy). It seems like
> this would be a bad idea; just checking.

If you're going to use scp, I strongly recommend generating a dump with
kdb5_util dump, scping that, and then loading it with kdb5_util load.
That's effectively what kprop/kpropd do.

Just copying the database file runs the risk of copying a corrupt database
because you happened to catch it in the middle of a write, as you note.

-- 
Russ Allbery (eagle at eyrie.org)              <http://www.eyrie.org/~eagle/>