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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