Troubles with bind resolving zip4.usps.com

[Mark Andrews]

> On Wed, Aug 03, 2005 at 04:29:32PM -0700, spork.sporkman at gmail.com wrote:
> > This one's got me stumped.  I've had no problems resolving this on
> > boxes that run dnscache locally, but my bind boxes are giving me no
> > answers, nothing in the logs.
> > 
> > BIND version 9.2.3rc4
> > Both FreeBSD 4.x and Linux 2.4.x
> > 
> > This is a subdomain delegated by the usps.com nameservers.  Here's what
> > dig tells me:
> ...
> > root at nameserver[~]# dig @56.0.82.25 zip4.usps.com
> > 
> > ; <<>> DiG 8.3 <<>> @56.0.82.25 zip4.usps.com
> > ; (1 server found)
> > ;; res options: init recurs defnam dnsrch
> > ;; got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
> > ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
> > ;; QUERY SECTION:
> > ;;      zip4.usps.com, type = A, class = IN
> > 
> > ;; AUTHORITY SECTION:
> > zip4.usps.com.          1H IN NS        nseag.usps.com.
> > zip4.usps.com.          1H IN NS        nssam.usps.com.
> > 
> > ;; ADDITIONAL SECTION:
> > nseag.usps.com.         1H IN A         56.0.133.232
> > nssam.usps.com.         1H IN A         56.0.65.232
> > 
> > ;; Total query time: 81 msec
> > ;; FROM: nameserver.xxx.net to SERVER: 56.0.82.25  56.0.82.25
> > ;; WHEN: Wed Aug  3 19:26:09 2005
> > ;; MSG SIZE  sent: 31  rcvd: 103
> ...
> 
> Note that the NS records are in the AUTHORITY section, and there is no
> ANSWER section!  The name server is somehow not delegating, but is aware
> of the name server.  I can't quite think how one could misconfigure BIND
> to do this, but it may not be a BIND name server.

	This is just a referral.  There is nothing wrong with it.

> In any case, without the ANSWERs, you're not going to get a response.
> 
> OBTW, I've seen your Web comic.  ;-)
> 
> -- 
> Joe Yao
> -----------------------------------------------------------------------
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> 
> 
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org