Date: Mon, 17 Mar 2008 17:30:21 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Nebojsa Miljanovic <neb@alcatel-lucent.com>
Cc: linux-kernel@vger.kernel.org,
       "Kittlitz, Edward (Ned)" <nkittlitz@alcatel-lucent.com>,
       asweeney@alcatel-lucent.com,
       "Polhemus, William (Bart)" <bpolhemus@alcatel-lucent.com>
Subject: Re: SO_REUSEADDR not allowing server and client to use same port
Message-ID: <20080317173021.28e6fd97@core>
In-Reply-To: <47DE9FB0.5030801@alcatel-lucent.com>
References: <47C6FA2A.5030302@alcatel-lucent.com>
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	<47D97DF7.8000702@alcatel-lucent.com>
	<20080315133426.1f48c99c@the-village.bc.nu>
	<47DE9FB0.5030801@alcatel-lucent.com>
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On Mon, 17 Mar 2008 11:43:28 -0500
Nebojsa Miljanovic <neb@alcatel-lucent.com> wrote:

> Alan,
> thanks. With that additional INFO, I was able to find detailed description of
> this denial of service attack (attached below).
> Just to clarify. Having this port re-use check prevents folks from launching
> this attack as opposed to being victim of it?

Different issue. I can hijack a connection.

Imagine I have a server bound to *.5000, and someone is about to connect.
If on the server box I am able to bind and issue a connect outwards
matching the inbound connection I will get the connection not the server.
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