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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