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CentOS error with iptables recent module

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linux-howto

http://serverfault.com – This is the rule in iptables for stop sync_flood attacks: iptables -A INPUT -m state --state NEW -p tcp -m tcp --syn \ -m recent --name synflood --set iptables -A INPUT -m state --state NEW -p tcp -m tcp --syn \ -m recent --name synflood --update --seconds 1 --hitcount 60 -j DROP Error: iptables: Unknown error 4294967295 I don't know what exactly to do, this ocurrs when insert the last rule "-m recent --name synflood --update --seconds 1 --hitcount 60 -j DROP" Here the kernel version 2.6.18-274.12.1.el5PAE (HowTos)