GNU GPL - Copyright helps Copyleft Thanks Thanks to Alan Cox, Alexey Kuznetsov, David Miller, Andi Kleen for implementing (one of?) the world's best TCP/IP stacks Paul 'Rusty' Russell for starting the netfilter/iptables project for trusting me to maintain it today Astaro AG for sponsoring parts of my netfilter work Free Software Foundation for the GNU Project for the GNU General Public License The slides of this presentation are available at http://www.gnumonks.org/