Bind9 logging options

Todd Snyder tsnyder at
Mon May 17 13:09:46 UTC 2010

Are the timed out queries recursive or authoritative?

I'd suggest tcpdump running on both the BIND servers and the client, so
you can match send/receive and show missed packets directly.



-----Original Message-----
From: at
[ at] On Behalf Of
Sent: Monday, May 17, 2010 6:39 AM
To: bind-users at
Subject: Bind9 logging options

I have a problem in my recursive DNS servers (Bind 9, on RHEL 5).
package on my system is the latest bind-9.3.6-4.P1.el5_4.2 from Red Hat.
problem is that sometimes, queries are failed with timeouts and that the
of my 2 DNS servers (the one set as primaryin my users) has 3 time more
queries than the secondary, while the succesful queries are almost the
same. . 
I am almost sure that the problem is network related (hardware or
but I need a proof for that. Is there any way to log the timed-out
queries in 
a log file? 

Thank you
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