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Harald Welte (born in 1979) is a programmer from Germany. Within the Linux community, Welte is well known as a hacker on the Linux kernel and for his activities in enforcing the GNU General Public License (GPL), the license that governs the use of much of free software.

Linux kernel development


Welte is chairman of the core team responsible for the netfilter/iptables project. (http://www.netfilter.org/about.html#history) He is also credited with writing the UUCP over SSL how-to, and some minor contributions to User-mode Linux and international encryption kernel projects.

GPL enforcement


In recent times, Welte has become prominent for his work with gpl-violations.org - an organisation he set up to track down and prosecute violators of the GPL, and which had been untested in court until then.
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