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Date: Tue, 28 Aug 2001 20:59:29 -0500
From: Tim Walberg <twalberg@mindspring.com>
To: Dale Amon <amon@vnl.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Vger triggering alerts
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In-Reply-To: <20010829015050.F27869@vnl.com> from Dale Amon on 08/28/2001 19:50
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I've seen similar from a number of sites. You might want
to run the packets through ethereal or tcpdump or similar
to verify it, but the ones I've investigated have ended up
being ECN packets - seems snort isn't yet smart enough to
understand the ECN extensions to TCP...

				tw


On 08/29/2001 01:50 +0100, Dale Amon wrote:
>>	Any one have an idea why I'd be getting these snort alerts
>>	from vger mail transactions?
>>=09
>>	[**] [111:4:1] spp_stream4: WINDOW VIOLATION detection [**]
>>	08/27-01:01:27.806453 199.183.24.194:45473 -> 194.46.0.61:25
>>	TCP TTL:49 TOS:0x0 ID:25963 IpLen:20 DgmLen:74 DF
>>	***AP*** Seq: 0x3DFC914F  Ack: 0xC8CF2D66  Win: 0x16D0  TcpLen: 32
>>	TCP Options (3) =3D> NOP NOP TS: 137819194 96190743=20
>>=09
>>	--=20
>>	------------------------------------------------------
>>	Use Linux: A computer        Dale Amon, CEO/MD
>>	is a terrible thing          Village Networking Ltd
>>	to waste.                    Belfast, Northern Ireland
>>	------------------------------------------------------
>>	-
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twalberg@mindspring.com

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