netdev - Re: TCP Persist Timer DoS

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Message-ID: <20090620091100.GB22935@mail.oracle.com>
Date:	Sat, 20 Jun 2009 02:11:00 -0700
From:	Joel Becker <Joel.Becker@...cle.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: TCP Persist Timer DoS

On Sat, Jun 20, 2009 at 01:05:14AM -0700, David Miller wrote:
> From: Joel Becker <Joel.Becker@...cle.com>
> Date: Fri, 19 Jun 2009 15:31:06 -0700
> 
> > Hey Netfolk,
> > 	I have to assume you've seen
> > http://www.phrack.org/issues.html?issue=66&id=9&mode=txt.  Does anyone
> > have a plan or opinion on the DoS?  A way to mitigate it, a -EDONTCARE
> > opinion, anything?
> 
> This is just like every other "DoS" out there where the attacker has
> to reveal it's IP identity to accomplish the attack, in that it is
> trivial to protect using netfilter by limiting the number of
> connections a host can make with your system.

	Thanks Dave, I knew there was a reason this wasn't all that
scary.

Joel

-- 

"Hell is oneself, hell is alone, the other figures in it, merely projections."
        - T. S. Eliot

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@...cle.com
Phone: (650) 506-8127
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