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Date:      Mon, 17 Apr 2006 19:34:11 +0000 (UTC)
From:      "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
To:        Kelly Yancey <kbyanc@posi.net>
Cc:        freebsd-net@freebsd.org
Subject:   Re: tcpdump and ipsec
Message-ID:  <20060417192638.U13011@maildrop.int.zabbadoz.net>
In-Reply-To: <20060413155210.R73176@gateway.posi.net>
References:  <442D8E98.6050903@vineyard.net> <20060331222813.GA29047@zen.inc> <20060331223613.GD80492@spc.org> <20060402130227.G99958@atlantis.atlantis.dp.ua> <20060402113516.D76259@maildrop.int.zabbadoz.net> <20060402151039.R51461@atlantis.atlantis.dp.ua> <20060411153224.L55107@gateway.posi.net> <20060411213528.F13011@maildrop.int.zabbadoz.net> <20060413155210.R73176@gateway.posi.net>

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On Thu, 13 Apr 2006, Kelly Yancey wrote:

> I'm curious: how are you performing NAT on your tunnelled traffic?

the answer is simple: do not NAT on the ipsec interface though it's
not fully correct because I do even NAT traffic that goes like:

A ---- lan1(ipsec only) --- gw(NAT) --- lan2(ipsec only) ---- B

[ipsec only == esp and ike allowed]

so the better explanation perhaps is:
do not nat on the ipsec interface of the outgoing direction.

-- 
Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT



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