netdev - Re: [PATCH] TCP: add option for silent port knocking with integrity protection

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Date:	Thu, 12 Dec 2013 16:46:37 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Christian Grothoff <grothoff@...tum.de>,
	Jacob Appelbaum <jacob@...elbaum.net>,
	Andi Kleen <andi@...stfloor.org>,
	Stephen Hemminger <stephen@...workplumber.org>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, knock@...net.org
Subject: Re: [PATCH] TCP: add option for silent port knocking with integrity protection

On Thu, Dec 12, 2013 at 06:34:24AM -0800, Eric Dumazet wrote:
> With various proposals (like TCP minion), maybe its time to be able to
> implement part of TCP stack in user land (Keep the mux inside the
> kernel, and forward raw incoming packets to user land where all the
> crazy things can be done without kernel patching.)

Maybe this knocking scheme is implementable with a socket filter and we could
add a switch to tweak drop behaviour.

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