On Tue, 2010-12-07 at 16:31 -0600, David A. Evans wrote:
>         I would like to silently drop the AAAA record lookups instead
> of responding back with NXDOMAIN.  Thusly generating a performance hit
> as the application waits 2 seconds for the reply. 

Responding with NXDOMAIN will have a definite effect on your
recalcitrant application owner - it will stop the v4 lookup as well :-)
If you can do it just for him, that would be ideal.

If the application exists only at one or very few locations you could
rate limit inbound queries at your firewall.

Regards, K.

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Karl Auer (ka...@biplane.com.au)                   +61-2-64957160 (h)
http://www.biplane.com.au/kauer/                   +61-428-957160 (mob)

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