netdev - Re: [PATCH RFC] netfilter: iptables target SYNPROXY

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Message-ID: <AANLkTild6hAh1PPeHj_Q06k8drq-O9O9Nc48Urknm4in@mail.gmail.com>
Date:	Wed, 26 May 2010 06:52:45 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
Cc:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH RFC] netfilter: iptables target SYNPROXY

On Wed, May 26, 2010 at 3:03 AM, Jozsef Kadlecsik
<kadlec@...ckhole.kfki.hu> wrote:
>>
>> Yea. Only MSS option is  supported. But it is better than being DoSed.
>> And you can set a threshold for SYNPROXY with limit match, then there
>> isn't any difference if there isn't any SYN-flood attack.
>
> If I (have to) limit SYNPROXY, why shouldn't I better limit the SYN
> packets directly instead?
>

Without SYNPROXY, you have to drop the over limit SYN packets, and
maybe normal SYN packets are dropped.

-- 
Regards，
Changli Gao(xiaosuo@...il.com)
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