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List:       shrew-vpn-help
Subject:    [vpn-help] All IPSec SA proposals found unacceptable!
From:       mgrooms () shrew ! net (Matthew Grooms)
Date:       2010-02-22 5:54:02
Message-ID: 4B821BFA.9080608 () shrew ! net
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On 2/19/2010 1:00 AM, Robert L Sowders wrote:
>
> Thanks Matthew,
>
> So is what protocol is NAT-T?
>
> Pardon my ig.
>
> BTW, got my firewall people to open UDP ports 4500 and 10000 and my
> shrew vpn client works now. Thanks for the tip.
>

NAT-T is the RFC standard for encapsulation of IPsec ESP in UDP. It 
communicates over port 4500 by default ...

http://www.ietf.org/rfc/rfc3947.txt
http://www.ietf.org/rfc/rfc3948.txt

-Matthew


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