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Date:      Sun, 9 Apr 2000 21:15:27 -0700 (PDT)
From:      Andy McConnell <andym@houseofcats.org>
To:        freebsd-isp@freebsd.org
Subject:   natd and passing ipsec data
Message-ID:  <Pine.BSF.4.10.10004071019390.33403-100000@neroon.houseofcats.org>

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I'm looking for a workaround to allow hosts on a private IP subnet to
setup ipsec VPNs through a natd implementation.

I am using FreeBSD 3.4-RELEASE now as the natd/ipfw and router.  I have a
10.0.0.0/24 subnet inside, using a single IP address on the outside for
NAT.  

I am looking to use a standard IPSec client (which uses AH and ESP, as
well as IKE (udp port 500)) on one fo the inside clients.  I know AH won't
work, but ESP *should* according to other recommendations.

I think now that the flavor of NAT I'm running will only support UDP and
TCP.  I get the feeling that other IP flavors (protocols 50 and 50, AH and
ESP) are ignored by this version of natd.

I have heard some reports from people running a Cisco PIX firewall that
Cisco's NAT could do this.

Has anyone had success in this using a FreeBSD natd?

-Andy


--
Andy McConnell	andym@houseofcats.org

Those who make peaceful revolution impossible will make violent
revolution inevitable.
                               -- John F. Kennedy




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