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Date:      Thu, 14 Dec 2006 11:31:27 -0800
From:      Julian Elischer <julian@elischer.org>
To:        Alexander Motin <mav@alkar.net>
Cc:        FreeBSD Net <freebsd-net@freebsd.org>
Subject:   Re: question for TCP gurus (in ipfw)
Message-ID:  <4581A68F.5010208@elischer.org>
In-Reply-To: <4581566C.5070600@alkar.net>
References:  <1166066689.00653827.1166055601@10.7.7.3> <4581566C.5070600@alkar.net>

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Alexander Motin wrote:
> Julian Elischer wrote:
>> could we do either of:
>> 1/ not set the ACK bit  and just not do the extra work. Just send a 
>> reset?
> 
> Reset packet MUST have valid sequence number. Else it will be rejected 
> as protection from DoS atack.

Andre's reference explains it very well...  thanks..



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