On Nov 21, 2008, at 12:50 PM, John Almberg wrote:

This is the week for strange problems...

I use rsync to copy tinydns data files to backup name servers. This has been working for about a year with no problem. Suddenly, I am getting odd errors:

/usr/local/bin/rsync -az -e 'ssh ' data.cdb [EMAIL PROTECTED]:/ usr/local/etc/tinydns/root/data.cdb
channel 1: open failed: administratively prohibited: open failed

The rsync does work. That is, the file is copied over. So this is actually a warning, I guess.

On the other server, the one the file is being copied TO, the following is printed in /var/log/auth.log

Nov 21 12:43:38 qu sshd[4604]: Address maps to on.example.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! Nov 21 12:43:38 qu sshd[4604]: Accepted publickey for root from port 55777 ssh2

I'm guessing this is some sort of DNS mis-match, but I don't quite grasp what the problem could be.

Ahhhh... a reverse DNS problem!

Sorry for the dumb question, but it's amazingly helpful to just write down the question clear enough for the group. It frequently clarifies the problem to the point where the answer becomes obvious, even to a newbie like me.

DNS had been delegated to this server, but now that seems to be no longer working, so the reverse DNS look up is all wrong. That makes sense... an external change by the colo guys must have triggered this.

Will get on to them, and that should short this problem out.

-- John

freebsd-questions@freebsd.org mailing list
To unsubscribe, send any mail to "[EMAIL PROTECTED]"

Reply via email to