netdev - Re: [PATCH] IPsec NAT-T issue

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Message-ID: <20160613102024.GX7698@gauss.secunet.com>
Date:	Mon, 13 Jun 2016 12:20:24 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Blair Steven <blair.steven@...iedtelesis.co.nz>
CC:	<netdev@...r.kernel.org>
Subject: Re: [PATCH] IPsec NAT-T issue

On Mon, Jun 13, 2016 at 11:48:13AM +1200, Blair Steven wrote:
> 
> During testing we have discovered an issue with IPsec NAT-T where the SPI
> is over writing the source and dest ports of the UDP header. 

The headers should be restored after the crypto operation in
esp_restore_header(). Does this not happen in your case? What
kind of problem do you experience?