stranger domain

[Sebastian E. Castro Avila]

On Wed, 22 Mar 2006 11:00:29 -0400, Frank Y.F. Luo <luoy at muohio.edu> wrote:

>
> I was doing a name checking for some domains, say, kean.edu
>
> My name server could not resolve it
>
> $host kean.edu
> ;; connection timed out; no servers could be reached
>

Transient conectivity problems?

>
> However, when I turned on trace, it stops at the one point ( the name  
> server
> of kean.edu)
>
> $dig +trace @xxx.xx.xx.xx  kean.edu
>
> ; <<>> DiG 9.2.4rc6 <<>> +trace @xxx.xxx.xxx.xxx kean.edu
> ;; global options:  printcmd
> .                       195497  IN      NS      C.ROOT-SERVERS.NET.
> .                       195497  IN      NS      D.ROOT-SERVERS.NET.
> .                       195497  IN      NS      E.ROOT-SERVERS.NET.
> .                       195497  IN      NS      F.ROOT-SERVERS.NET.
> .                       195497  IN      NS      G.ROOT-SERVERS.NET.
> .                       195497  IN      NS      H.ROOT-SERVERS.NET.
> .                       195497  IN      NS      I.ROOT-SERVERS.NET.
> .                       195497  IN      NS      J.ROOT-SERVERS.NET.
> .                       195497  IN      NS      K.ROOT-SERVERS.NET.
> .                       195497  IN      NS      L.ROOT-SERVERS.NET.
> .                       195497  IN      NS      M.ROOT-SERVERS.NET.
> .                       195497  IN      NS      A.ROOT-SERVERS.NET.
> .                       195497  IN      NS      B.ROOT-SERVERS.NET.
> ;; Received 436 bytes from xxx.xx.xx.xx#53 in 35 ms
>
> edu.                    172800  IN      NS      A3.NSTLD.COM.
> edu.                    172800  IN      NS      C3.NSTLD.COM.
> edu.                    172800  IN      NS      D3.NSTLD.COM.
> edu.                    172800  IN      NS      E3.NSTLD.COM.
> edu.                    172800  IN      NS      G3.NSTLD.COM.
> edu.                    172800  IN      NS      H3.NSTLD.COM.
> edu.                    172800  IN      NS      L3.NSTLD.COM.
> edu.                    172800  IN      NS      M3.NSTLD.COM.
> ;; Received 299 bytes from 192.33.4.12#53(C.ROOT-SERVERS.NET) in 46 ms
>
> kean.edu.               172800  IN      NS      ASTRO1.kean.edu.
> kean.edu.               172800  IN      NS      ASTRO2.kean.edu.
> ;; Received 100 bytes from 192.5.6.32#53(A3.NSTLD.COM) in 36 ms
>
> dig: Couldn't find server 'ASTRO1.kean.edu': Name or service not known
>
> Any idea about this strange thing? Thanks in advance.
>

That error comes from dig is unable to find the address for  
'astro1.kean.edu'. According to my experience, a3.nstld.com should include  
a glue record in additional section for that server, to eliminate  
ambiguity in name resolution.

I did the same test, and I got the glue records from that server. I tried  
with trace and everything worked fine. I don't have any further clue about  
it.

Regards
-- 
Sebastian E. Castro Avila             sebastian at nic.cl
Administrador de DNS, NIC Chile

Agustinas 1357 Piso 4
Santiago, Chile Cod. Postal 6500587
Phone: +56-2-9407705                  Fax  : +56-2-9407701