[EMAIL PROTECTED] wrote on 02/14/2008
03:26:44 PM:
> I'm starting to pull my hair out about rsync obtusely misbehaving,
> dying with Child exited prematurely messages and gradually driving me
> insance. :)
>
> Any of you with such problems in the past that would care to shed
some light?
I get these *ALL* the time. I did not get this problem with RHEL3
clients, but I do with RHEL4 and 5.
I eventually found that my problem is likely an iptables problem.
Somehow, iptables was losing track of my connection and started dropping
packets.
I did extensive testing on it and reported the information to the rsync
and BackupPC communities. I don't know if I followed up with the
iptables people--by then, I was too frustrated and had wasted *entirely*
too much time on it.
Here's a message describing it in detail:
http://lists.samba.org/archive/rsync/2007-February/017222.html
Eventually, I solved this by creating an iptables rule on the BackupPC
server that allows any packet with a sport of 873 (rsyncd) to be
accepted, and, of course, there is a rule on the client side allowing
any packet with a dport of 873 to be allowed as well. On the server
side, this rule should *never* have a packet match: the
established-connection rule above it should be fine. But it's not:
when I look, I see lots of packets accepted due to that rule.
What changed? Your guess is as good as mine. It's not a BackupPC
problem; it's either an rsync problem or (more likely) an iptables
problem. But what, exactly, I do not know.
Or, at this point, care. I would be happy to know the problem is fixed,
but adding the stupid iptables rule is a good enough solution for me.
Tim Massey
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