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Re: Re: Root DNS Server Issues?

  • From: John M. Brown
  • Date: Tue Oct 01 20:22:09 2002

Don't worry about being a DNS clunkhead.  Though some on this list
will banish you for trying to learn.

The root servers are non-recursive.  Otherwords they only 
answer for what they know.

WHat you are asking for is a server to be recursive in its
answer to your query.  This is what a ISP"s server will do.

What OS is your DNS server running ?  

If its a Unix version, then I could help via the phone if you
would like.  write me back privately with contact data.

John Brown
Le Geek

On Tue, Oct 01, 2002 at 08:07:57PM -0400, John Neiberger wrote:
> Forgive me for being a DNS clunkhead.  <g>  I honestly don't 
> know much about it, but I thought I'd post this to the list 
> because it did appear to be a problem with the root servers, 
> which would be A Bad Thing (tm).
> 
> Probable dumb question:  if I do an nslookup from a desktop 
> directed at a root server, should the name eventually resolve?  
> Or, is a request to a root server from our DNS server a 
> different kind of request?  I have a feeling it is and that I'm 
> barking up the wrong tree.
> 
> That might explain why an nslookup directed at someone else's 
> name server is working. 
> 
> Still, that would lead us back to the original problem.  Our 
> DNS server can't communicate with the root servers.  Hmm..
> 
> Again, I apologize for being a total noob at this.  I believe 
> that I'm misunderstanding the symptoms and using the wrong 
> tools to troubleshoot!
> 
> Thanks to all,
> John
> 
> ---- On Tue, 1 Oct 2002, John M. Brown 
> (john@chagresventures.com) wrote:
> 
> > Root servers don't resolve names other than the TLD's.
> > 
> > OTW they don't have data for www.yahoo.com    only for  .com
> > which will point you towards the gTLD servers (listed below)
> > which will point you towards Yahoo's name servers.
> > 
> > What names are you trying to lookup ?
> > 
> > John Brown
> > Le Geek
> > 
> > 
> > On Tue, Oct 01, 2002 at 07:46:00PM -0400, John Neiberger 
> wrote:
> > > We're getting responses from the root servers, the names 
> just 
> > > aren't resolving.  From a windows NT machine the error 
> is "Non-
> > > existent Domain".  
> > > 
> > > Ah, I just noticed something.  The packet length for the 
> DNS 
> > > response is supposed to be 510 bytes but it's being 
> truncated 
> > > to 128.  What the heck would cause that??  
> > > 
> > > John
> > > 
> > > ---- On Tue, 1 Oct 2002, John M. Brown 
> > > (john@chagresventures.com) wrote:
> > > 
> > > > 
> > > > 
> > > > Here is for L, F also seems to reply.  Tested from 8 
> different
> > > > places on the net.  OTW Transit splay on the test was 8 
> > > different
> > > > providers.
> > > > 
> > > > 
> > > > 
> > > > Can you give a sample of the "errors" you are seeing?
> > > > 
> > > > Got a sample DIG line ??
> > > > 
> > > > John Brown
> > > > Le Geek
> > > > 
> > > > 
> > > > 
> > > > %dig @l.root-servers.net com ns
> > > >  
> > > > ; <<>> DiG 8.3 <<>> @l.root-servers.net com ns
> > > > ; (1 server found)
> > > > ;; res options: init recurs defnam dnsrch
> > > > ;; got answer:
> > > > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
> > > > ;; flags: qr rd; QUERY: 1, ANSWER: 13, AUTHORITY: 0, 
> > > ADDITIONAL: 13
> > > > ;; QUERY SECTION:
> > > > ;;      com, type = NS, class = IN
> > > >  
> > > > ;; ANSWER SECTION:
> > > > com.                    2D IN NS        L.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        F.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        J.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        K.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        E.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        M.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        A.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        G.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        H.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        C.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        I.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        B.GTLD-
> SERVERS.NET.
> > > > com.                    2D IN NS        D.GTLD-
> SERVERS.NET.
> > > >  
> > > > ;; ADDITIONAL SECTION:
> > > > L.GTLD-SERVERS.NET.     2D IN A         192.41.162.30
> > > > F.GTLD-SERVERS.NET.     2D IN A         192.35.51.30
> > > > J.GTLD-SERVERS.NET.     2D IN A         192.48.79.30
> > > > K.GTLD-SERVERS.NET.     2D IN A         192.52.178.30
> > > > E.GTLD-SERVERS.NET.     2D IN A         192.12.94.30
> > > > M.GTLD-SERVERS.NET.     2D IN A         192.55.83.30
> > > > A.GTLD-SERVERS.NET.     2D IN A         192.5.6.30
> > > > G.GTLD-SERVERS.NET.     2D IN A         192.42.93.30
> > > > H.GTLD-SERVERS.NET.     2D IN A         192.54.112.30
> > > > C.GTLD-SERVERS.NET.     2D IN A         192.26.92.30
> > > > I.GTLD-SERVERS.NET.     2D IN A         192.43.172.30
> > > > B.GTLD-SERVERS.NET.     2D IN A         192.33.14.30
> > > > D.GTLD-SERVERS.NET.     2D IN A         192.31.80.30
> > > >  
> > > > ;; Total query time: 89 msec
> > > > ;; FROM: jedi.staff.chagres.net to SERVER: l.root-
> > > servers.net  198.32.64.12
> > > > ;; WHEN: Tue Oct  1 17:29:36 2002
> > > > ;; MSG SIZE  sent: 21  rcvd: 453
> > > >  
> > > > %
> > > > On Tue, Oct 01, 2002 at 07:08:37PM -0400, John Neiberger 
> > > wrote:
> > > > > 
> > > > > We seem to be getting name resolution errors when we 
> query 
> > > any 
> > > > > of the root servers, and this just started a hour or so 
> ago.
> > > > > 
> > > > > Anyone else noticing a problem?
> > > > > 
> > > > > John
> > > > 
> > > > 
> > > 
> > 
> > 
>