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http://www.zeroflux.org/knock
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http://pyroman.alioth.debian.org
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http://www.minithins.net/warehouse/DDoS.txt
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http://www.gnomemeeting.org/index.php?rub=3&pos=0&faqpage=x161.html
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http://www.hackszine.com/blog/archive...rs_firewall.html?CMP=OTC-7G2N43923558
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http://www.heise-security.co.uk/articles/82481
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http://fr.gentoo-wiki.com/HOWTO_msn_messenger_derri%C3%A8re_un_NAT
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http://www.sixxs.net/wiki/IPv6_Firewalling
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http://www.wiz.ro/linux/half