h_v_prashanth (Sun, 11 Aug 2002) wrote:
> > Seems OK now - after your DNS changes propogate.
>
> Yeah, now its working. But this problem is very strange.
> Any idea, why this kind of error occurs ?
Any idea why you screwed up your DNS the first time? :)
> I just removed the entire domain. Restartd the service. Stopped the
> service. created a new zone file. After restarting again, things began
> working. Strange it is !!!!
If you had preserved the old (with an error) zonefile and diff'd it
against the new, working one, you might have found out.
> Yeah, what u r telling is true. But since we are a domain hosting
> company and there are more than 600 domains hosted with mailing
> solutions, we are afraid to do any upgradation. Any idea how to go about
> without affecting the work ?
There are ways - such as bringing up a backup box with a new OS version,
etc. Right now, with that ancient machine you have there, it is a matter
of time before someone or the other breaks into it. Especially after you
have been so kind as to post the hostname and IP on a publicly archived
mailing list.
I'd say, upgrade ASAP. And till then, shutdown and/or firewall all
unnecessary services, upgrade sendmail, apache, and the kernel (stick to
the 2.2.x series - I think 2.2.20 is the latest there).
Especially disable telnet, and install the latest version of openssh.
--suresh
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