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Date: Mon, 22 Apr 2019 17:32:39 +0200 (CEST)
From: Wojciech Puchar <wojtek@puchar.net>
To: Eugene Grosbein <eugen@grosbein.net>
cc: Wojciech Puchar <wojtek@puchar.net>, freebsd-hackers@freebsd.org
Subject: Re: openvpn and system overhead
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>> well it has to cooperate with multitude of clients like windoze,
>> point&click routers etc. that's why openvpn.
>
> Windows has stock support for IPSec with and without L2TP and has no stock openvpn, so IPSec is more preferable.

can IPSEC VPN work over nat? even freebsd-freebsd case.

I cannot find any tutorial how to do this.