nslookup-non existent host/domain

[Maria Teresa Pineda]

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