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DNS look up against a specific DNS provider
From: irongeek at irongeek.com (Adrian Crenshaw)
Date: Thu, 25 Jun 2009 13:32:00 -0400

Does anyone know a way to specify a reverse DNS look up against a specific
DNS provider? I don't want to use the DNS that is authoritive for  the given
IP range. For example, look up all of the IPs at my org to see if any are
mapped to some host name at DYNDNS? Some bot nets use these services for
naming, so I thought this might be useful.

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