From owner-freebsd-ipfw@FreeBSD.ORG  Thu Sep 11 20:08:19 2008
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Date: Thu, 11 Sep 2008 13:08:19 -0700
From: Julian Elischer <julian@elischer.org>
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Subject: anyone have a netgraph node to do ipfw filtering?
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I think someone sent me a link to an ng_ipfw_filter node once
but I've lost it...

(I think it was called ng_ipfw but that name is now taken by the
netgraph/ipfw 'ipfw netgraph' packet divert option).

Something that lets you do ipfw filtering on packets as they
travel across a graph.

As I said,I've seen one but lost it...

Julian