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diff --git a/2004/gpl-wos2004/.abstract.swp b/2004/gpl-wos2004/.abstract.swp
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diff --git a/2004/gpl-wos2004/abstract b/2004/gpl-wos2004/abstract
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+Enforcing the GNU GPL - Copyright helps Copyleft
+
+More and more vendors of various computing devices, especially network-related
+appliances such as Routers, NAT-Gateways and 802.11 Access Points are using
+Linux and other GPL licensed free software in their products.
+
+While the linux community can look at this as a big success, there is a back
+side of that coin:  A large number of those vendors have no idea about the GPL
+license terms, and as a result do not fulfill their obligations under the GPL.
+
+The netfilter/iptables project has started legal proceedngs against a number of
+companies in violation of the GPL since December 2003.  Those legal proceedings
+were quite successful so far, resulting in a number of amicable agreements and
+one granted preliminary injunction.
+
+The speaker will present an overview about his recent successful enforcement of
+the GNU GPL within German jurisdiction.
+
+In the end, it seems like the idea of the founding fathers of the GNU GPL
+works:  Guaranteeing Copyleft by using Copyright.
+
diff --git a/2004/gpl-wos2004/biography b/2004/gpl-wos2004/biography
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+  Harald Welte is the chairman of the netfilter/iptables core team.
+
+  His main interest in computing has always been networking.  In the few time
+left besides netfilter/iptables related work, he's writing obscure documents
+like the UUCP over SSL HOWTO.  Other kernel-related projects he has been
+contributing are user mode linux and the international (crypto) kernel patch.
+
+  He has been working as an independent IT Consultant working on projects for
+various companies ranging from banks to manufacturers of networking gear.
+During the year 2001 he was living in Curitiba (Brazil), where he got
+sponsored for his Linux related work by Conectiva Inc.
+
+  Starting with February 2002, Harald has been contracted part-time by
+<a href="http://www.astaro.com/">Astaro AG</a>, who are sponsoring him for his
+current netfilter/iptables work.  
+
+  Aside from the Astaro sponsoring, he continues to work as a freelancing
+kernel developer and network security consultant.
+
+  He licenses his software under the terms of the GNU GPL.  He is determined to bring all users, distributors, value added resellers and vendors of netfilter/iptables based products in full compliance with the GPL, even if it includes raising legal charges.
+
+
+  Harald is living in Berlin, Germany.
+
+
diff --git a/2004/gpl-wos2004/gpl-wos2004.mgp b/2004/gpl-wos2004/gpl-wos2004.mgp
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+%include "default.mgp"
+%default 1 bgrad
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+%nodefault
+%back "blue"
+
+%center
+%size 7
+
+
+Enforcing the GNU GPL
+Copyright helps Copyleft
+
+
+%center
+%size 4
+by
+
+Harald Welte <laforge@netfilter.org>
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+GNU GPL - Copyright helps Copyleft
+Contents
+
+
+	Introduction
+
+	The GNU General Public License
+	Motivations for licensing under the GPL
+	Enforcing the GNU GPL
+
+	Thanks
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page 
+GNU GPL - Copyright helps Copyleft
+Introduction
+
+Who is speaking to you?
+
+		an independent Free Software developer
+		who earns his living off Free Software since 1997
+		who is one of the authors of the linux kernel firewall system called netfilter/iptables
+
+Why is he speaking to you?
+
+		because he became aware of copyright (copyleft?) infringement and took legal action within German jurisdiction
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+GNU GPL - Copyright helps Copyleft
+The GNU General Public License
+
+What is the GNU General Public License?
+
+		A software license issued by the Free Software Foundation, originally meant for their Free Software in the GNU project.
+		The commonly used Version is the GPLv2 from 1991
+		Can be considered as the first 'copyleft' licenses, before the idea of 'free software' spread to 'free content' and other areas.
+		Traditional software licenses are designed to restrict the rights of the user
+			no copying
+			no modificatio
+			no reverse engineering
+		The GPL instead tries to grant fundamental freedoms
+			freedom to run the program
+			freedom to study the program and adapt it (requires source code)
+			freedom to redistribute
+			freedom to improve and publish improvements
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+GNU GPL - Copyright helps Copyleft
+The GNU General Public License
+
+But, the GPL does not only grant rights!
+
+		In order to preserve the fundametal freedom, any distribution of a program has to
+			mention that the work is licensed under the GPL
+			include the GPL license text
+			either include the source code, or provide a written offer how to receive a copy of the source code
+
+		Also, any derived work that is being distributed has to
+			make available the source code of the derived work
+
+Unfortunately, the wide misconception about copyright, free software, public
+domain (even the RedHat CEO!) leads to people unknowignly, or even wilfully 
+only benefit from the freedom but not fulfill the obligations stated above.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+GNU GPL - Copyright helps Copyleft
+Enforcing the GNU GPL
+
+Enforcing the GPL
+		GPL violations are nothing new, as GPL licensed software is nothing new.
+		However, the recent Linux boom 
+		The FSF enforces GPL violations of code on which they hold the copyright
+			silently, without public notice
+			in lengthy negotiations
+		During 2003 the "Linksys" case drew a lot of attention
+			Linksys was selling 802.11 WLAN Acces Ponts / Routers
+			Lots of GPL licensed software embedded in the device (included Linux, uClibc, busybox, iptables, ...)
+			FSF led alliance took the 'qiet' approach and it took about four months until the full source code was released
+		Some developers didn't agree with this approach
+			not enough publicity
+			violators don't loose anything by first not complying and wait for the FSF
+			four months delay is too much for low product lifecycles in WLAN world
+		So the netfilter/iptables project started to do their own enforcement in more cases coming up
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+GNU GPL - Copyright helps Copyleft
+Enforcing the GNU GPL
+
+Enforcing the GPL
+		chronological order
+			reverse engineering of firmware images
+			sending the infringing organization a warning notice
+			wait for them to sign a statement to cease and desist
+			applying for a preliminary injunction if they don't (max 4 weeks after reverse engineering)
+
+		Success so far
+			amicable agreement with Asus, Belkin, Allnet, Fujitsu-Siemens, Securepoint, U.S.Robotics
+			some of which made significant donations to charitable organizations of the free software community
+			preliminary injunction against Sitecom
+			negotiating in more cases
+			public awareness 
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+GNU GPL - Copyright helps Copyleft
+Enforcing the GNU GPL
+
+Enforcing the GPL
+		remains an important issue for Free Software
+		will start to happen within the court
+		has to be made public in order to raise awareness
+
+Problems
+		only the copyright holder (in most cases the author) can do it
+		users discovering GPL'd software need to communicate those issues to all copyright holders
+
+	The http://www.gpl-violations.org/ project was started
+		as a platform wher users can report alleged violations
+		to verify those violations and inform all copyright holders
+		to inform the public about ongoing enforcement efforts
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%page
+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
+%size 3
+	The slides of this presentation are available at http://www.gnumonks.org/
+%size 3
+	The netfilter homepage http://www.netfilter.org/
+%size 3
+	The http://www.gpl-violations.org/ project
+
+
diff --git a/2004/gpl-wos2004/gpl-wos2004.pdf b/2004/gpl-wos2004/gpl-wos2004.pdf
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+++ b/2004/gpl-wos2004/gpl-wos2004.pdf