Problems resolving hosts in vetcentric.com domain

Smith, William E. (Bill), Jr. Bill.Smith at jhuapl.edu
Tue Jun 28 17:36:53 UTC 2005


We are having some problems here where we are temporarily (or in some cases until we stop/restart named) unable to resolve hosts within the vetcentric.com domain.  Since a stop/restart of named resolved the problems the first time this occurred, we initially thought something was corrupted with the DNS cache.  However, the problem continues to crop up randomly.  In some cases, it will stop resolving for say 20 minutes or so and then begin resolving again with no action taken on our end.  We have eliminated firewall issues after some extensive investigation on that end and believe it's something DNS related.  I've attempted to put named in debug mode (setting level as high as 5); however, named continues to log only information as shown below despite the level I use.  What's more baffling is that if I attempted to start named from the command line with a debug level of 1 or 2 that it does not create the named.run file.  Only when I enabled debugging at level 3 or higher does it create it.  In any case, I'm somewhat puzzled as to what is causing this on again/off again type behavior with resolving hosts in this domain.  Any ideas, suggestions, etc would be appreciated.  Will provide other information as needed/requested.  
Our servers are all running 9.3.1 at present.  FWIW, we are able to resolve hosts in the domain, including just vetcentric.com itself from remote DNS servers, thus indicating some issue on our end or somewhere between us and the vetcentric name servers.

28-Jun-2005 13:06:46.792 client @1eea90: udprecv
28-Jun-2005 13:06:46.792 client @1f0910: accept
28-Jun-2005 13:06:46.792 client @1f2b50: udprecv
28-Jun-2005 13:06:46.792 client @1f49e8: accept
28-Jun-2005 13:06:47.196 client 128.244.197.32#53: UDP request
28-Jun-2005 13:06:47.196 client 128.244.197.32#53: view internet: using view 'in
ternet'
28-Jun-2005 13:06:47.196 client 128.244.197.32#53: view internet: query
28-Jun-2005 13:06:47.196 client 128.244.197.32#53: view internet: replace
28-Jun-2005 13:06:47.197 client @1d9470: create
28-Jun-2005 13:06:47.197 client @1d9470: udprecv
28-Jun-2005 13:06:47.216 client 128.244.194.100#53: UDP request
28-Jun-2005 13:06:47.216 client 128.244.194.100#53: view internet: using view 'i
nternet'
28-Jun-2005 13:06:47.216 client 128.244.194.100#53: view internet: query
28-Jun-2005 13:06:47.216 client 128.244.194.100#53: view internet: replace
28-Jun-2005 13:06:47.216 client @255db0: create
28-Jun-2005 13:06:47.216 client @255db0: udprecv
28-Jun-2005 13:06:47.341 client 192.112.36.4#53: UDP request
28-Jun-2005 13:06:47.341 client 192.112.36.4#53: next
28-Jun-2005 13:06:47.341 client 192.112.36.4#53: endrequest
28-Jun-2005 13:06:47.341 client @255db0: udprecv

Bill Smith
<mailto:bill.smith at jhuapl.edu>
ISS Server Systems Group
Johns Hopkins University Applied Physics Laboratory 
11100 Johns Hopkins Road 
Laurel, MD 20723
Phone:  443-778-5523
Web:  http://www.jhuapl.edu <http://www.jhuapl.edu/>    




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