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Old 2009-05-26, 11:33 PM   #1
cd34
a.k.a. Sparky
 
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Join Date: Sep 2004
Location: West Palm Beach, FL, USA
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Reverse DNS Lookups are used to prevent spoofing attacks on hostname based authentication. Disabling that is a matter between you and your host.

Short of some very specific cases, we haven't run Reverse DNS lookups on production sites due to the slight performance hit the first time a new surfer hits a site.
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