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Date:	Sun, 22 Apr 2012 23:38:38 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	bhutchings@...arflare.com
Cc:	netdev@...r.kernel.org
Subject: Re: Question with secure_ipv4_port_ephemeral() implementation

Ben Hutchings wrote:
> All this randomisation is concerned with preventing spoofing attacks by
> attackers that can't see any packets routed to the spoofed address.  If
> they can see the return packets then this is all in vain, which is why
> we generally want cryptography at the transport or application level.
> But if they can't then the port offset remains secret - right?
> 
> (Port randomisation is not very useful on it own due to the small number
> space, but see
> <http://en.wikipedia.org/wiki/DNS_cache_poisoning#Prevention_and_mitigation>.)

Thank you. So, this change (which looked to me a regression) is not a regression.
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