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Date:      Sat, 22 Mar 2014 22:33:48 -0700
From:      Julian Elischer <julian@freebsd.org>
To:        RW <rwmaillists@googlemail.com>, freebsd-security@freebsd.org, ipfw@FreeBSD.org
Subject:   Re: URGENT?
Message-ID:  <532E723C.2090109@freebsd.org>
In-Reply-To: <20140322151155.184d5229@gumby.homeunix.com>
References:  <51546.1395432085@server1.tristatelogic.com> <20140322182402.Q83569@sola.nimnet.asn.au> <201403221454.IAA22021@mail.lariat.net> <20140322151155.184d5229@gumby.homeunix.com>

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On 3/22/14, 8:11 AM, RW wrote:
> On Sat, 22 Mar 2014 08:48:40 -0600
> Brett Glass wrote:
>
>> This is correct. And that's awkward, because you might not want all of
>> these checks in one place. Also, if there are many dynamic rules this
>> will slow traffic down quite a bit.

in ipfw that's up to you..
but I usually put the check-state quite early in my rule sets.
I am working on a new rc.firewall that is much more efficient.
the trouble is that the script to make it do what I want is a bit more 
complicated.
I'll put it out for discussion later. maybe tonight.

> It should be the other way around. Once a flow has been learned it's
> just a simple hash-table lookup once you hit the first stateful rule.
> In pf most packets bypass the rules altogether.
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