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Date:      11 Jan 2000 09:42:13 +0100
From:      Dag-Erling Smorgrav <des@flood.ping.uio.no>
To:        Brad Knowles <blk@skynet.be>
Cc:        Holtor <holtor@yahoo.com>, freebsd-questions@FreeBSD.ORG, freebsd-stable@FreeBSD.ORG
Subject:   Re: Kernel Option: TCP_DROP_SYNFIN
Message-ID:  <xzpya9xq9sq.fsf@flood.ping.uio.no>
In-Reply-To: Brad Knowles's message of "Sun, 9 Jan 2000 23:03:20 %2B0100"
References:  <20000109201829.20220.qmail@web116.yahoomail.com> <v04220801b49eb51f4dab@[195.238.19.152]>

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Brad Knowles <blk@skynet.be> writes:
> At 12:18 PM -0800 2000/1/9, Holtor wrote:
> >  Would this help stop SYN floods from breaking my
> >  freebsd computer? if anyones tried it, please speak
> >  up with any results or how it works. Thanks!
> 	I've used it and haven't seen it do any harm to the systems I was 
> using it on, although I can't speak for how well it might have helped 
> them survive a SYN flood.  Unless you're using TTCP (TCP for 
> Transactions), you should probably be safe in enabling it.

It doesn't have anything to do with syn floods at all. It merely
prevents OS fingerprinting (at least the way nmap does it).

DES
-- 
Dag-Erling Smorgrav - des@flood.ping.uio.no


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