From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tsuyoshi Takada Subject: iptables limit-burst trouble Date: Mon, 09 Jun 2003 11:22:21 +0900 Sender: netfilter-admin@lists.netfilter.org Message-ID: <20030609111735.C484.ACROYEAR@gmx.ch> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: netfilter@lists.netfilter.org Hi, I want to limit Web DoS attack. I have set the following but it does not work well. iptables -N flood-chk iptables -A INPUT -p tcp --dport 80 --syn -j flood-chk iptables -A flood-chk -m limit --limit 1/sec --limit-burst 2 -j RETURN iptables -A flood-chk -j LOG --log-prefix "IPTABLES HTTP FLOOD-PACKET" iptables -A flood-chk -j DROP After I accessed to my web site, I pushed reload button of my web browser repeatedly but I was not denied by iptables. Why? regards, -- Tsuyoshi Takada