Performance Tuning RHEL 5 and Bind

Charles Swiger cswiger at
Tue Oct 29 04:35:48 UTC 2013


On Oct 28, 2013, at 9:05 PM, Alan Clegg <alan at> wrote:
> Slave

+1; it’s also worth looking into why there is such a high volume
of DNS queries.  Is it simply a big network with a lot of chatty
clients?  Or is TTL turned down so low that client side caching
is not effective and needs to requery often?

Or is something doing a host scan?  If it’s your network IDS or
security/network admin folks running a portscan, fine; if it’s
malware or an intruder scanning the local subnet(s), one might want
to notice and take steps to solve the problem rather than a symptom.


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