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On Fri, 29 Oct 2010 22:02:56 -0400
> I see there's a RDNS_NONE rule for when the sending IP address has no
> DNS PTR (reverse DNS) record. But no rule for when that PTR record
> doesn't have a matching A (forward DNS) record that matches the
> sending IP?
There's one in the optional Botnet plugin, there are a couple of
problems with it though. Its rdns lookups aren't very efficient, and
it doesn't work for IPv6.