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Date:      Fri, 31 Oct 2003 15:17:53 +0100
From:      Eric Masson <e-masson@kisoft-services.com>
To:        Lars Eggert <larse@ISI.EDU>
Cc:        Mailing List FreeBSD Network <freebsd-net@FreeBSD.org>
Subject:   Re: ipsec tunnels & packet length issues
Message-ID:  <868yn1qyni.fsf@t39bsdems.interne.kisoft-services.com>
In-Reply-To: <3FA02B30.90805@isi.edu> (Lars Eggert's message of "Wed, 29 Oct 2003 13:03:44 -0800")
References:  <8665iehd1i.fsf@t39bsdems.interne.kisoft-services.com> <3FA02B30.90805@isi.edu>

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>>>>> "Lars" == Lars Eggert <larse@ISI.EDU> writes:

Hello Lars,

 Lars> See the section on PMTU discovery in draft-touch-ipsec-vpn-06. If
 Lars> the requirements of your setup allow is, IPIP gif tunnels
 Lars> together with IPsec transport mode (as described in the ID) can
 Lars> address this issue.

The kind of setup described in your draft should adress the issue, but
choice has been to use native ipsec tunnels (maybe this will change in
near future).

The only workaround I've found is to lower mtu on the fw1 dmz interface
to 1436 (thanks to M. Sierchio)

Hope your draft will be adopted.

Thanks a lot

Eric Masson

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