[OT] Weird DNS Problem

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None of my internal boxes (three running FC6 plus my wife's W2K box) can resolve the address of my ISP's web site. Other internet sites (Google, Slashdot, weather.com, Yahoo, BBC, CNN, etc.) all work just fine. Also, I can get to my ISP's web site if I browse from my gateway/firewall/name server box which the internal boxes all point to for DNS. Finally, if I use the IP address for my ISP's web site from an internal system, the page displays as expected. This would seem to indicate that nothing is blocking their web site.

The only thing I can find that's at all odd is dig returns:

[root@fraud ~]# dig any mesanetworks.net

; <<>> DiG 9.2.4 <<>> any mesanetworks.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29964
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;mesanetworks.net.              IN      ANY

;; ANSWER SECTION:
mesanetworks.net.       8620    IN      NS      ns1.mesanetworks.net.
mesanetworks.net.       8620    IN      NS      ns2.mesanetworks.net.

;; AUTHORITY SECTION:
mesanetworks.net.       8620    IN      NS      ns1.mesanetworks.net.
mesanetworks.net.       8620    IN      NS      ns2.mesanetworks.net.

;; ADDITIONAL SECTION:
ns1.mesanetworks.net.   8620    IN      A       69.93.53.228
ns2.mesanetworks.net.   8620    IN      A       69.93.53.229

;; Query time: 6 msec
;; SERVER: 72.19.169.230#53(72.19.169.230)
;; WHEN: Sun Nov  5 21:43:14 2006
;; MSG SIZE  rcvd: 130

for their domain (www.mesanetworks.net resolves to a CNAME that points to mesanetworks.net). Note the absence of an IP address in the answer section. Their web site includes links to a different box for support services. These links resolve and work just fine. A dig of their support box yields:

[root@fraud etc]# dig any mesasupport.net

; <<>> DiG 9.2.4 <<>> any mesasupport.net
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41449
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;mesasupport.net.               IN      ANY

;; ANSWER SECTION:
mesasupport.net.        14300   IN      A       70.84.171.6
mesasupport.net.        14300   IN      NS      ns3.zingserve.com.
mesasupport.net.        14300   IN      NS      ns4.zingserve.com.

;; AUTHORITY SECTION:
mesasupport.net.        14300   IN      NS      ns3.zingserve.com.
mesasupport.net.        14300   IN      NS      ns4.zingserve.com.

;; ADDITIONAL SECTION:
ns3.zingserve.com.      7285    IN      A       70.84.171.3
ns4.zingserve.com.      7285    IN      A       70.84.171.4

;; Query time: 7 msec
;; SERVER: 72.19.169.230#53(72.19.169.230)
;; WHEN: Sun Nov  5 22:32:32 2006
;; MSG SIZE  rcvd: 158

Note the IP address in the answer section. So far, that's the only difference I can come up with.

If anyone has any suggestions, please let me know. My ISP says everything is ducky on their side. I don't hit their web site very often but it used to work with no problems.

Thanks,
Dave

--
Politics, n. Strife of interests masquerading as a contest of principles.
-- Ambrose Bierce

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