issues with mcd.com DNS

[Mark_Andrews at isc.org]

> I'm also seeing similar behavior for mcdkorea.co.uk:
> 
> on dcns2.ch1.ummail.com (this box doesn't accept queries from the public 
> internet, so in case you try and get nuttin ;), I can do this:
> 
> 
> [root at dcns2.ch1 log]# dig mx mcdkorea.co.kr
> 
> ; <<>> DiG 9.2.1 <<>> mx mcdkorea.co.kr
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34629
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
> 
> ;; QUESTION SECTION:
> ;mcdkorea.co.kr.                        IN      MX
> 
> ;; ANSWER SECTION:
> mcdkorea.co.kr.         2585    IN      MX      1010 mcdkorea.co.kr.
> 
> ;; AUTHORITY SECTION:
> mcdkorea.co.kr.         2585    IN      NS      ns.mcdkorea.co.kr.
> 
> ;; Query time: 2 msec
> ;; SERVER: 216.64.206.205#53(216.64.206.205)
> ;; WHEN: Mon Oct 13 09:34:30 2003
> ;; MSG SIZE  rcvd: 65
> 
> 
> So, I would assume that the answer is now cached on dcns2.ch1.ummail.com.
> 
> ...but on another box on the same /24, when I query against 
> dcns2.ch1.ummail.com, I get:
> 
> mc1:/root> dig mx mcdkorea.co.kr @dcns2.ch1.ummail.com
> 
> ; <<>> DiG 8.2 <<>> mx mcdkorea.co.kr @dcns2.ch1.ummail.com
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; res_nsend to server dcns2.ch1.ummail.com  216.64.213.4: Connection 
> timed out
> 
> 
> ...and I have *no* idea why.  Restarting named on dcns2.ch1.ummail.com 
> doesn't help.

	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.

	Mark

; <<>> DiG 8.3 <<>> ns.mcdkorea.co.kr +norec @210.127.223.65 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 61491
;; flags: qr aa ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUERY SECTION:
;;	ns.mcdkorea.co.kr, type = A, class = IN

;; AUTHORITY SECTION:
mcdkorea.co.kr.		1H IN SOA	ns.mcdkorea.co.kr. administrator.mcdkorea.co.kr. (
					5		; serial
					1H		; refresh
					10M		; retry
					1D		; expiry
					1H )		; minimum


;; Total query time: 323 msec
;; FROM: bsdi.dv.isc.org to SERVER: 210.127.223.65  210.127.223.65
;; WHEN: Tue Oct 14 09:26:27 2003
;; MSG SIZE  sent: 35  rcvd: 85

> 
> 
> -- 
> --------------------------------------------------------
> 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