From: Andi Kleen <ak@suse.de>
To: kuznet@ms2.inr.ac.ru
Cc: Manfred Spraul <manfred@colorfullife.COM>, linux-kernel@vger.kernel.org
Subject: Re: Linux 2.2.16 through 2.2.18preX TCP hang bug triggered by rsync
Date: Wed, 24 Jan 2001 21:56:34 +0100 [thread overview]
Message-ID: <20010124215634.A2992@gruyere.muc.suse.de> (raw)
In-Reply-To: <3A6E02E6.B3261E1@colorfullife.com> <200101242003.XAA21040@ms2.inr.ac.ru>
In-Reply-To: <200101242003.XAA21040@ms2.inr.ac.ru>; from kuznet@ms2.inr.ac.ru on Wed, Jan 24, 2001 at 11:03:34PM +0300
On Wed, Jan 24, 2001 at 11:03:34PM +0300, kuznet@ms2.inr.ac.ru wrote:
> Hello!
>
> > I read through the tcpdump, and it seems that Linux completely ignores
> > packets with out-of-window sequence numbers:
>
> Yes, Linux is __very__ not right doing this. RFC requires to accept
> ACK, URG and RST on any segment adjacent to window, even if window
> is zero.
It's mostly for security to make it more difficult to nuke connections
without knowing the sequence number.
Remember RFC is from a very different internet with much less DoS attacks.
-Andi
-
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next prev parent reply other threads:[~2001-01-24 20:57 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-23 22:17 Manfred Spraul
2001-01-23 22:59 ` Manfred Spraul
2001-01-24 20:03 ` kuznet
2001-01-24 20:34 ` Manfred Spraul
2001-01-24 20:42 ` kuznet
2001-01-25 18:35 ` kuznet
2001-01-24 20:56 ` Andi Kleen [this message]
2001-01-25 10:58 ` Matthias Andree
2001-01-25 12:17 ` James Sutherland
2001-01-25 12:27 ` Matthias Andree
2001-01-25 11:32 ` David S. Miller
2001-01-25 11:40 ` Andi Kleen
2001-01-25 11:44 ` David S. Miller
2001-01-25 11:56 ` Andi Kleen
2001-01-25 12:25 ` James Sutherland
-- strict thread matches above, loose matches on Subject: below --
2001-01-26 20:56 Dave Dykstra
2001-01-27 18:27 ` kuznet
2001-01-25 12:24 Studierende der Universitaet des Saarlandes
2001-01-25 12:34 ` Andi Kleen
2001-01-23 20:42 Dave Dykstra
2001-01-23 22:51 ` Dave Dykstra
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