nslookup-non existent host/domain

[Chris Cell]

I forgot to put this in my last response. This may not be a dns issue, but a
routing issue. Make sure you have classless routing turned on your outside
router. You may not be able to reach these places because they are in the
same classful address range. For example if you have the network 62.1.1.0
(from .1-.254) and you are doing classful routing then you will not be able
to reach any of the 62.0.0.0 network, no matter where in the world it is.

----- Original Message -----
From: Maria Teresa Pineda <mariap at digitalvideosystems.net>
To: <bind-users at isc.org>
Sent: Wednesday, March 22, 2000 9:00 AM
Subject: nslookup-non existent host/domain


> Hi, I hope somebody can help me. I can not get answer for some external
> domains and for anothers ones I do. For example if I try with psi.com I
get
> "non existent host/domain" , if I change for another server (like
> a.root-servers.net) I get answer. If I try, with my server, the external
> domain ibm.net (for example) I get answer. Also I realize that if I ask
for
> psi.com using nslookup with q=any I get answer, the same happen with
> q=ns  but with q=a I do not get answer ("non existent host/domain"). If I
> try "dig -x 38.8.5.2" (which is one of psi.com's name server) I get
answer,
> but if I try ping 38.8.5.2  I get " ICMP net unreachable".
> The same problem happen with akamaitech.net , exenet.com , shellwilcox.com
> domains.
> Of course I can not access the "www.psi.com" and "www.exenet.com" web
> pages. And I can not send e-mail neither receive e-mail from their users.
> Any help will be appreciate......
>
> PD: my resolv.conf is ok, I checked with " nslookup set all"
> My root.hints files are update.
>
> The following is the exit to the command "dig -d2 psi.com":
>
> ;; res_mkquery(0, 220.161.253.38.in-addr.arpa, 1, 12)
> ------------
> SendRequest(), len 45
> HEADER:
> opcode = QUERY, id = 3751, rcode = NOERROR
> header flags: query, want recursion
> questions = 1, answers = 0, authority records = 0, additional = 0
> QUESTIONS:
> 220.161.253.38.in-addr.arpa, type = PTR, class = IN
> ------------
> ------------
> Got answer (214 bytes):
> HEADER:
> opcode = QUERY, id = 3751, rcode = NOERROR
> header flags: response, auth. answer, want recursion, recursion avail.
> questions = 1, answers = 1, authority records = 3, additional = 3
> QUESTIONS:
> 220.161.253.38.in-addr.arpa, type = PTR, class = IN
> ANSWERS:
> -> 220.161.253.38.in-addr.arpa
> type = PTR, class = IN, dlen = 17
> name = dvs.nuphase.com
> ttl = 86400 (1D)
> AUTHORITY RECORDS:
> -> 161.253.38.in-addr.arpa
> type = NS, class = IN, dlen = 8
> nameserver = gator.nuphase.com
> ttl = 86400 (1D)
> -> 161.253.38.in-addr.arpa
> type = NS, class = IN, dlen = 18
> nameserver = sec1.dns.psi.net
> ttl = 86400 (1D)
> -> 161.253.38.in-addr.arpa
> type = NS, class = IN, dlen = 7
> nameserver = sec2.dns.psi.net
> ttl = 86400 (1D)
> ADDITIONAL RECORDS:
> -> gator.nuphase.com
> type = A, class = IN, dlen = 4
> internet address = 38.253.161.130
> ttl = 86400 (1D)
> -> sec1.dns.psi.net
> type = A, class = IN, dlen = 4
> internet address = 38.8.92.2
> ttl = 94335 (1d2h12m15s)
> -> sec2.dns.psi.net
> type = A, class = IN, dlen = 4
> internet address = 38.8.93.2
> ttl = 94335 (1d2h12m15s)
> ------------
> Server: dvs.nuphase.com
> Address: 38.253.161.220
> ;; res_mkquery(0, psi.com, 1, 1)
> ------------
> SendRequest(), len 25
> HEADER:
> opcode = QUERY, id = 3752, rcode = NOERROR
> header flags: query, want recursion
> questions = 1, answers = 0, authority records = 0, additional = 0
> QUESTIONS:
> psi.com, type = A, class = IN
> ------------
> timeout
> timeout
> timeout
> timeout
> SendRequest failed
>
>
>
>
> Digital Video Systems - Miami
> a division of NuPhase Electronics, Inc.
> 3700 Northwest 114th Avenue
> Miami, Florida 33178-1843
> Tel: 786-331-2530
> Fax: 305-436-8802
> e-mail:mariap at digitalvideosystems.net
>
>
>
>
>