<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Dear Michael,</span></div><div><span></span> </div><div><span> If its related remote domain NS issue, i shouldn't be able to resolve the domain from anywhere continously. But i am able to resolve it from internet without any issue. Problem is with only from our company BIND DNS server only.</span></div><div><span></span> </div><div><span>Below is the BIND GW Logs:</span></div><div><span></span> </div><div><span>client 10.1.1.3#63581: view localhost_resolver: query: <a href="http://www.dubaiairport.com">www.dubaiairport.com</a> IN A +E<br>client 10.1.1.3#63836: view localhost_resolver: query: <a href="http://www.dubaiairport.com">www.dubaiairport.com</a> IN A +<br>client 10.1.1.3#62249: view localhost_resolver: query: <a href="http://www.dubaiairport.com">www.dubaiairport.com</a> IN A +E<br>client
10.1.1.3<var id="yui-ie-cursor"></var>#64215: view localhost_resolver: query: <a href="http://www.dubaiairport.com">www.dubaiairport.com</a> IN AAAA +<br></span></div><div><span>Below is the sniffer logs:</span></div><div><span></span> </div><div><span>3.351081 10.0.0.1 --> 213.42.52.75 DNS Standard Query A <a href="http://www.dubaiairport.com">www.dubaiairport.com</a></span></div><div><span>10.761810 10.0.0.2 --> 213.42.75.79 DNS Standard Query A <a href="http://www.dubaiairport.com">www.dubaiairport.com</a></span></div><div><span></span> </div><div><span>Above sniffer logs clearly shows that we are not getting response packet from <a href="http://www.dubaiairport.com">www.dubaiairport.com</a> NS.</span></div><div><span></span> </div><div><span>Regards</span></div><div><span>Papdheen M</span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family:
times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <font size="2" face="Arial"> <div style="margin: 5px 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line-height: 0; font-size: 0px;" class="hr" contentEditable="false" readonly="true"></div> <b><span style="font-weight: bold;">From:</span></b> Michael Sinatra <michael@rancid.berkeley.edu><br> <b><span style="font-weight: bold;">To:</span></b> babu dheen <babudheen@yahoo.co.in> <br><b><span style="font-weight: bold;">Cc:</span></b> Bind Users Mailing List <bind-users@lists.isc.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Monday, 19 March 2012 11:43 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: Name Resolution issue with one domain<br> </font> </div> <br>On 03/19/12 13:28, babu dheen wrote:<br>> Dear Support,<br>> I am trying to resolve www.dubaiairport.com<br>> <<a
href="http://www.dubaiairport.com" target="_blank">http://www.dubaiairport.com</a>> from my GW BIND server as below. But not<br>> getting any output<br>> $ dig A www.dubaiairport.com <<a href="http://www.dubaiairport.com" target="_blank">http://www.dubaiairport.com</a>><br>> ; <<>> DiG 9.3.4-P1 <<>> A www.dubaiairport.com<br>> <<a href="http://www.dubaiairport.com" target="_blank">http://www.dubaiairport.com</a>><br>> ;; global options: printcmd<br>> ;; connection timed out; no servers could be reached<br>> Whereas, when i try through dubaiairport.com NS, i am getting the<br>> response as below. What could be the problem. Any idea?<br>> $ dig @213.42.52.79 A www.dubaiairport.com <<a href="http://www.dubaiairport.com" target="_blank">http://www.dubaiairport.com</a>><br>> ; <<>> DiG 9.3.4-P1 <<>> @213.42.52.79 A www.dubaiairport.com<br>> <<a
href="http://www.dubaiairport.com" target="_blank">http://www.dubaiairport.com</a>><br>> ; (1 server found)<br>> ;; global options: printcmd<br>> ;; Got answer:<br>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48514<br>> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0<br>> ;; QUESTION SECTION:<br>> ;www.dubaiairport.com. IN A<br>> ;; ANSWER SECTION:<br>> www.dubaiairport.com <<a href="http://www.dubaiairport.com" target="_blank">http://www.dubaiairport.com</a>>. 7200 IN A 213.42.55.169<br>> ;; Query time: 127 msec<br>> ;; SERVER: 213.42.52.79#53(213.42.52.79)<br>> ;; WHEN: Mon Mar 19 23:25:35 2012<br>> ;; MSG SIZE rcvd: 54<br><br>When you see this sort of situation, a good guess is that there is an authority mismatch and some/all of the authoritative NS records listed in the child zone are not responding. In this case, there is an authority
mismatch:<br><br>dig +trace ns dubaiairport.com<br><br>[skip root response]<br><br>dubaiairport.com. 172800 IN NS dcaowa01.dubaiairport.com.<br>dubaiairport.com. 172800 IN NS svr-b003.dubaiairport.com.<br>[RRSIG deleted]<br>;; Received 608 bytes from 192.12.94.30#53(192.12.94.30) in 724 ms<br><br>dubaiairport.com. 7200 IN NS secdns.dubaiairport.com.<br>dubaiairport.com. 7200 IN NS auhans2.ecompany.ae.<br>dubaiairport.com. 7200 IN NS dxbans2.ecompany.ae.<br>dubaiairport.com. 7200 IN NS dxbans1.ecompany.ae.<br>dubaiairport.com.
7200 IN NS dcaowa01.dubaiairport.com.<br>dubaiairport.com. 7200 IN NS auhans1.ecompany.ae.<br>dubaiairport.com. 7200 IN NS svr-b003.dubaiairport.com.<br>;; Received 323 bytes from 213.42.52.79#53(213.42.52.79) in 279 ms<br><br>One of the above DNS servers, secdns.dubaiairport.com, isn't responding for me. Sometimes that's enough to cause intermittent timeouts for dig.<br><br>dig +nssearch dubaiairport.com<br>SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400 7200 from server 213.42.52.79 in 278 ms.<br>SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400 7200 from server 195.229.237.52 in 278 ms.<br>SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400 7200
from server 194.170.1.99 in 282 ms.<br>SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400 7200 from server 213.42.52.75 in 288 ms.<br>SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400 7200 from server 194.170.1.6 in 289 ms.<br>SOA dcaowa01.dca.com. administrator.dubaiairport.com. 2005061961 900 600 86400 7200 from server 194.170.1.7 in 293 ms.<br>;; connection timed out; no servers could be reached [referring to secdns.dubaiairport.com]<br><br>michael<br><br><br><br><br><br> </div> </div> </div></body></html>