From mboxrd@z Thu Jan  1 00:00:00 1970
From: Antony Stone <Antony@Soft-Solutions.co.uk>
Subject: Re: Iptables do nat with Protocol 47 or GRE
Date: Fri, 14 May 2004 13:44:54 +0100
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On Friday 14 May 2004 1:15 pm, Sez wrote:

> And, with l2pt or ipsec, iptables work fine without path GRE???

IPsec does not use GRE.   IPsec uses protocols 50 and 51 - ESP and AH.

IPsec works fine over NAT in Tunnel Mode (not Transport Mode without serious 
fiddling with things).

GRE is protocol 47.

L2TP is a UDP-based protocol (port 1701) as far as I know.

Regards,

Antony.

-- 
Your work is both good and original.  Unfortunately the parts that are good 
aren't original, and the parts that are original aren't good.

 - Samuel Johnson

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