From: ming fu <fming@borderware.com>
To: Rainer Arnst <Rainer.Arnst@ee-consultants.de>
Cc: NetFilter Mailling List <netfilter@lists.netfilter.org>
Subject: Re: IPSec Transport Mode
Date: Fri, 09 Jul 2004 12:51:19 -0400 [thread overview]
Message-ID: <40EECD07.1090009@borderware.com> (raw)
In-Reply-To: <1089390320.4237.29.camel@PCA-ARNSTR.ee-consultants.de>
Rainer Arnst wrote:
>>When you do NAT, you alter IP source and/or destination. But TCP
>>checksum includes IP addresses, which means you have to recompute it on
>>the fly when NATing. Anf for it is ciphered, you can't.
>>
>>
>
>Unfortuneately I have to find a way to make the transport mode work; we
>were using NAT-T, which worked fine, but now I am looking for another
>solution which does not require the VPN Gateway to support NAT-T.
>
>
If you are using NAT-T for outbound IPSEC connections, open udp port 500
and 4500 and source nat them. Just do not load any "smart VPN proxy"
that would alter other parts of the UDP, the simplest udp NAT will do
the trick.
>Greetings,
>Rainer
>
>
>
next prev parent reply other threads:[~2004-07-09 16:51 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-07 13:35 IPSec Transport Mode Arnst, Rainer
2004-07-07 13:53 ` Antony Stone
2004-07-07 14:21 ` Arnst, Rainer
2004-07-07 20:54 ` Antony Stone
2004-07-07 21:11 ` Sven Schuster
2004-07-07 21:42 ` Antony Stone
2004-07-07 23:53 ` Cedric Blancher
2004-07-08 12:00 ` Rainer Arnst
2004-07-09 15:38 ` Rainer Arnst
2004-07-09 16:13 ` Cedric Blancher
2004-07-09 16:25 ` Rainer Arnst
2004-07-09 16:51 ` ming fu [this message]
2004-07-07 14:32 ` listuser
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