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What is the advance feature of RPZ (Response Policy Zones) , RRL (Response Rate Limiting) & NXdomain in BIND?

Solution Unverified - Updated 2013-09-30T13:01:40+00:00 -

Issue

Building DNS Firewalls with Response Policy Zones (RPZ)
RRL - Response Rate Limiting ( Good one for avoiding DNS amplification attack)
NXdomain redirection

Environment

Red Hat Enterprise Linux 6

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