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/