Setting up a Root name server
Mark_Andrews at isc.org
Mark_Andrews at isc.org
Sat Sep 4 01:40:01 UTC 1999
While the root servers are set up not to recurse the *do* answer
recursive queries with referrals. Proof by example.
Mark
; <<>> DiG 8.2 <<>> non-existant.csiro.au @a.root-servers.net
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 10
;; QUERY SECTION:
;; non-existant.csiro.au, type = A, class = IN
;; AUTHORITY SECTION:
AU. 2D IN NS NS2.BERKELEY.EDU.
AU. 2D IN NS MULGA.CS.MU.OZ.AU.
AU. 2D IN NS MUNNARI.OZ.AU.
AU. 2D IN NS NS.EU.NET.
AU. 2D IN NS NS1.BERKELEY.EDU.
AU. 2D IN NS NS.UU.NET.
AU. 2D IN NS VANGOGH.CS.BERKELEY.EDU.
;; ADDITIONAL SECTION:
NS2.BERKELEY.EDU. 2D IN A 128.32.136.12
NS2.BERKELEY.EDU. 2D IN A 128.32.206.12
MULGA.CS.MU.OZ.AU. 2D IN A 128.250.1.22
MULGA.CS.MU.OZ.AU. 2D IN A 128.250.37.150
MUNNARI.OZ.AU. 2D IN A 128.250.1.21
NS.EU.NET. 2D IN A 192.16.202.11
NS1.BERKELEY.EDU. 2D IN A 128.32.136.9
NS1.BERKELEY.EDU. 2D IN A 128.32.206.9
NS.UU.NET. 2D IN A 137.39.1.3
VANGOGH.CS.BERKELEY.EDU. 2D IN A 128.32.33.5
;; Total query time: 604 msec
;; FROM: bsdi.dv.isc.org to SERVER: a.root-servers.net 198.41.0.4
;; WHEN: Sat Sep 4 11:36:46 1999
;; MSG SIZE sent: 39 rcvd: 368
>
>
> Michael Voight wrote:
>
> >
> >
> > Duh.... Did you do nslookup in NON RECURSIVE mode?? Root servers do not
> > respond to non-recursive queries AFAIK.
> >
>
> Ugh, root servers do not recurs. root nameservers only respond to non-recursi
> ve
> queries.. I hope you don't do this for a living...
>
>
>
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
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