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From: Eric Dumazet <eric.dumazet@gmail.com>
To: Denys Fedoryshchenko <denys@visp.net.lb>
Cc: netdev@vger.kernel.org
Subject: Re: SYN attack, with FIN flag set
Date: Sat, 03 Dec 2011 08:55:02 +0100	[thread overview]
Message-ID: <1322898902.2762.81.camel@edumazet-laptop> (raw)
In-Reply-To: <1322897233.2762.79.camel@edumazet-laptop>

Le samedi 03 décembre 2011 à 08:27 +0100, Eric Dumazet a écrit :

> I believe netfilter tcp conntrack considers SYN|FIN as INVALID
> 

Or if you cannot afford conntracking, just do

iptables -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP

  reply	other threads:[~2011-12-03  7:55 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-12-02 22:29 SYN attack, with FIN flag set Denys Fedoryshchenko
2011-12-03  7:27 ` Eric Dumazet
2011-12-03  7:55   ` Eric Dumazet [this message]
2011-12-03  8:18     ` Denys Fedoryshchenko
2011-12-03  8:53       ` Eric Dumazet
2011-12-03  9:03         ` Michael Tokarev
2011-12-03  9:07           ` Denys Fedoryshchenko
2011-12-03  9:41             ` Eric Dumazet
2011-12-03 10:02               ` Eric Dumazet
2011-12-03 18:40                 ` Denys Fedoryshchenko
2011-12-04  6:26               ` David Miller

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