issues with mcd.com DNS
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Tue Oct 14 00:36:25 UTC 2003
> Mark_Andrews at isc.org wrote:
>
> >
> >
> > ns.mcdkorea.co.kr only has glue. According to the zone it
> > does not exist. Once the cache learns that ns.mcdkorea.co.kr
> > doesn't exist lookups will fail.
> >
>
>
> But the catch already has a good answer cached, and a dig done against
> the cache (run on the same box as the cache) succeeds, while a dig from
> the same/24 as the cache, against the same cache, fails. If what you
> say is correct, I would (with my admittedly junior knowledge of DNS
> compared to you) expect both digs to fail.
>
> It's this apparent inconsistency that has me confused. Is this correct
> behavior?
From the previous mail. 216.64.206.205 != 216.64.213.4
; <<>> DiG 9.2.1 <<>> mx mcdkorea.co.kr
;; SERVER: 216.64.206.205#53(216.64.206.205)
; <<>> DiG 8.2 <<>> mx mcdkorea.co.kr @dcns2.ch1.ummail.com
; (1 server found)
;; res_nsend to server dcns2.ch1.ummail.com 216.64.213.4: Connection timed out
Since you have a timeout I would also be looking at firewall
settings. "dig +norec version.bind txt chaos @dcns2.ch1.ummail.com"
should verify reachability (also with +vc for TCP).
Mark
> Thanks,
>
> Dave
>
> --
> --------------------------------------------------------
> Dave Lugo dlugo at etherboy.com LC Unit #260 TINLC
> Have you hugged your firewall today? No spam, thanks.
> --------------------------------------------------------
> Are you the police? . . . . No ma'am, we're sysadmins.
>
>
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark.Andrews at isc.org
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