PowerDNS/pdns — pull request #1177 by ahupowerdns (2013-12-23 21:17:42+00:00)
Title: dontanswer - lua mode to cause powerdns to drop a packet

This pull requests implements the Lua return code 'pdns.DROP' (-2) which complements the existing (-1) which has been renamed to pdns.PASS, indicating a Lua handler is not touching the request at that stage. pdns.DROP could be useful to silence reflection attacks, or certain bad queries harming the system.