To: linux-kernel@vger.kernel.org
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From: "Henning P. Schmiedehausen" <hps@intermeta.de>
Newsgroups: hometree.linux.kernel
Subject: Re: bandwidth for bkbits.net (good news)
Date: Tue, 2 Sep 2003 07:01:21 +0000 (UTC)
Organization: INTERMETA - Gesellschaft fuer Mehrwertdienste mbH
Message-ID: <bj1f81$its$3@tangens.hometree.net>
References: <20030830230701.GA25845@work.bitmover.com> <Pine.LNX.4.44.0308310256420.16308-100000@neptune.local> <20030831013928.GN24409@dualathlon.random> <20030831025659.GA18767@work.bitmover.com> <1062335711.31351.44.camel@dhcp23.swansea.linux.org.uk> <20030831144505.GS24409@dualathlon.random> <1062343891.10323.12.camel@dhcp23.swansea.linux.org.uk> <20030831154450.GV24409@dualathlon.random>
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Andrea Arcangeli <andrea@suse.de> writes:

>> It doesn't work when you dont control incoming. As a simple extreme
>> example if I pingflood you from a fast site then no amount of shaping
>> your end of the link will help, it has to be shaped at the ISP end.

>sure, that's why I said it won't work with synflood. I just doubt the
>ping/syn floods distributed denial of services are an high percentage of

The traffic on sites like www.microsoft.com, www.kernel.org or I'd say
even www.bkbits.net isn't distinguishable from a DDoS Synflood on a
regular day. A bazillion of different IP addresses from all over the
net trying to establish a TCP connection at the same time. And the
other sides are dog-slow modem/isdn/dsl connections which means high
latency, low bandwith, many retransmits and still they're legal
connections that you want to serve.

Forget it. You can't compare your homegrown ISDN/DSL line with the
traffic of a serious internet service. If you try, you get burned.

	Regards
		Henning

-- 
Dipl.-Inf. (Univ.) Henning P. Schmiedehausen          INTERMETA GmbH
hps@intermeta.de        +49 9131 50 654 0   http://www.intermeta.de/

Java, perl, Solaris, Linux, xSP Consulting, Web Services 
freelance consultant -- Jakarta Turbine Development  -- hero for hire

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