netdev - Re: [PATCH] nf-nat: don't use per destination incrementing ports in nat random mode

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Message-ID: <52B37F6B.9010105@redhat.com>
Date:	Fri, 20 Dec 2013 00:21:15 +0100
From:	Daniel Borkmann <dborkman@...hat.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
CC:	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
	kaber@...sh.net
Subject: Re: [PATCH] nf-nat: don't use per destination incrementing ports
 in nat random mode

On 12/19/2013 02:40 PM, Hannes Frederic Sowa wrote:
> Don't use per destination incrementing port allocation
> in NF_NAT_RANGE_PROTO_RANDOM mode as advised in
> <https://sites.google.com/site/hayashulman/files/NIC-derandomisation.pdf>.
>
> This is especially important for UDP/DNS.
>
> Cc: Patrick McHardy <kaber@...sh.net>
> Cc: Daniel Borkmann <dborkman@...hat.com>
> Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>

I would have liked a more elaborate commit message ;) but anyway,
lgtm, now that we also have periodic reseeding in prandom:

Reviewed-by: Daniel Borkmann <dborkman@...hat.com>

The referenced paper in section 5 is also available here:

http://arxiv.org/pdf/1205.5190v1.pdf
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