<font size=2 face="sans-serif">Hi all,</font>
<br>
<br><font size=2 face="sans-serif">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.</font>
<br>
<br><font size=2 face="sans-serif">Yesterday, (two weeks after the initial
problem and curiously at around the same time) the problem reappeared for
about 30 minutes. </font>
<br>
<br><font size=2 face="sans-serif">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. </font>
<br>
<br><font size=2 face="sans-serif">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!</font>
<br>
<br><font size=2 face="sans-serif">R.</font>
<br>