Setting up a Root name server
Michael Voight
mvoight at cisco.com
Sat Sep 4 13:44:58 UTC 1999
I am not wrong, the wording was wrong. I meant they do not do recursion.
(I actually meant to say the do not give a recursive response)
Michael
marka at isc.org wrote:
>
> Michael *both* you and chris are wrong as root servers do not
> "not respond" based on the setting of recursion desired.
>
> Whether you get an answer to the question asked or a referral
> is another question altogether and depends upon the question asked
> and what is currently being served. But in either case you do
> get a response.
>
> Mark
> >
> > Corrrect, my wording was incorrect.
> >
> > I meant " Did you do nslookup in NON RECURSIVE mode?? Root servers do
> > not
> > respond with recursive queries"
> >
> > And, yes, I do this for a living.
> >
> > Michael
> >
> > Mark_Andrews at isc.org wrote:
> > >
> > > 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-rec
> > ursi
> > > > 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
> >
> --
> 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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