Strange DNS Resolution Issues

[Pablo Arturi]

You should try a 'dig microsoft.com +trace' and see where the problem resides.

 
Pablo Lionel Arturi
Maipú 464 - 1° B - 1006 Capital Federal
Ciudad Autónoma de Buenos Aires
+5411 5218 4829
parturi at bairesweb.com
  ----- Original Message ----- 
  From: Revital Gorsht 
  To: bind-users at lists.isc.org 
  Sent: Tuesday, April 07, 2009 4:53 PM
  Subject: Strange DNS Resolution Issues


  Hi all, 

  A few weeks ago, two of several internal DNS servers were suddenly unable to resolve some external sites (eg microsoft.com, yahoo.com), while all internal and other external sites (eg google.com) were resolving fine.  Since we couldn't pinpoint the cause, the problem went on for about 5 hours and then magically fixed itself... we were all left scratching our heads. 

  Yesterday, (two weeks after the initial problem and curiously at around the same time) the problem reappeared for about 30 minutes.   

  All of our servers (affected and non-affected) are running BIND 9.5.1-P1.  The failed queries return timeouts or SERVFAILs.  Restarting BIND did not fix the problem.  Nothing suspicious in the logs. 

  Has anyone else experienced this sort of thing recently? Can anyone point me in the right direction?? Is this even a BIND issue???  I'll be more than happy to provide any further details! 

  R. 



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