From: "J. Bakshi" <joydeep@infoservices.in>
To: netfilter@vger.kernel.org
Subject: Re: Hot to design syn-flood protection based on ip ?
Date: Tue, 01 Sep 2009 11:58:55 +0530 [thread overview]
Message-ID: <4A9CBF27.1070600@infoservices.in> (raw)
In-Reply-To: <4A967DE2.2060601@infoservices.in>
J. Bakshi wrote:
Any clue ?
> Hello list,
>
> I have finally come to know the bad effect of syn-flood protection.
>
> ``````````````````````
> iptables -N syn-flood
> iptables -A INPUT -i $IFACE -p tcp --syn -j syn-flood
> iptables -A syn-flood -m limit --limit 1/s --limit-burst 4 -j RETURN
> iptables -A syn-flood -j DROP
> ```````````````````````````
>
> The codes above drops the packets blindly if a single host initiate a
> syn-flood and as a result other hosts can't get the ports. Is there a
> way to modify the rules so it drop the packets from the host which is
> sending the syn-flood packets ?
>
> eagerly waiting for a response.
> Thanks
> --
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>
next prev parent reply other threads:[~2009-09-01 6:28 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-27 12:36 Hot to design syn-flood protection based on ip ? J. Bakshi
2009-09-01 6:28 ` J. Bakshi [this message]
2009-09-01 6:58 ` Marek Kierdelewicz
2009-09-01 7:38 ` J. Bakshi
2009-09-01 8:12 ` Marek Kierdelewicz
2009-09-01 8:50 ` J. Bakshi
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