Problems with naming resolution

[Mark_Andrews at isc.org]

	To find problems you sometimes need to go up one or more levels
	in the dns heirachy.  In this case secdns.gov.sg is giving out
	the wrong answers.  The correct answer should have been a
	referral.

	Mark

; <<>> DiG 8.2 <<>> soa +norec internet.gov.sg @secdns.gov.sg 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15996
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;;	internet.gov.sg, type = SOA, class = IN

;; Total query time: 162 msec
;; FROM: bsdi.dv.isc.org to SERVER: secdns.gov.sg  160.96.128.4
;; WHEN: Thu Jun 10 20:05:42 1999
;; MSG SIZE  sent: 33  rcvd: 33


> Ok. Some of the hosts that I have trouble resolving include :
> 
> www6.internet.gov.sg.
> maillist.internet.gov.sg.
> www.env.gov.sg.
> 
> Some of them can be resolved but cannot be resolved at other sites.
> (see below) At other times I can resolve it. IS this normal or a symptom of 
> some problem ? Appreciate if anyone
> could help.
> 
> thanks
> 
> 
> >www6.internet.gov.sg.
> Server:  pridns.gov.sg
> Address:  160.96.179.4
> 
> Name:    www6.internet.gov.sg
> Address:  160.96.179.42
> 
> >server pridns.cyberway.com.sg.
> Default Server:  pridns.cyberway.com.sg
> Address:  203.116.1.78
> 
> >www6.internet.gov.sg.
> Server:  pridns.cyberway.com.sg
> Address:  203.116.1.78
> 
> Non-authoritative answer:
> Name:    www6.internet.gov.sg
> Address:  160.96.179.42
> 
> >server pridns.pacific.net.sg.
> Default Server:  pridns.pacific.net.sg
> Address:  203.120.90.60
> 
> >www6.internet.gov.sg.
> Server:  pridns.pacific.net.sg
> Address:  203.120.90.60
> 
> *** No address (A) records available for www6.internet.gov.sg.
> >server dnscache1.singnet.com.sg.
> Default Server:  dnscache1.singnet.com.sg
> Address:  165.21.83.88
> 
> >www6.internet.gov.sg.
> Server:  dnscache1.singnet.com.sg
> Address:  165.21.83.88
> 
> *** No address (A) records available for www6.internet.gov.sg.
> >^C
> 
> 
> >From: Barry Margolin <barmar at bbnplanet.com>
> >To: comp-protocols-dns-bind at moderators.uu.net
> >Subject: Re: Problems with naming resolution
> >Date: Wed, 09 Jun 1999 13:55:22 GMT
> >
> >In article <19990609122857.46138.qmail at hotmail.com>,
> >John Tan  <d_name at hotmail.com> wrote:
> > >Other people seem to be having problems accessing / resolving names via 
> >my
> > >name server. For example, if I try ls -d internet.gov.sg. from
> > >other name servers I get an unspecified error. But I seem to be able
> > >to query correctly. Intermittently users complain that they cannot
> > >resolve the DNS names. The DNS is pridns.gov.sg. appreciate any 
> >assistance.
> >
> >The "ls" command uses zone transfers, and you can only do zone transfers
> >from an authoritative nameserver.  You should not expect it to work when
> >using other name servers.  Ordinary queries should work, though.  I tried a
> >few with my name server and they worked fine.  If you still think there's a
> >problem, please be more specific than "havig problems accessing / resolving
> >names"; give some examples that don't involve zone transfers, since they're
> >normally only used by slave servers, not ordinary resolving.
> >
> >--
> >Barry Margolin, barmar at bbnplanet.com
> >GTE Internetworking, Powered by BBN, Burlington, MA
> >*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
> >Please DON'T copy followups to me -- I'll assume it wasn't posted to the 
> >group.
> >
> 
> 
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> 
> 
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org