Jan Just Keijser is an open source professional from Utrecht, the
Netherlands. He has a wide range of experience in IT, ranging from
providing user support, system administration, and systems programming
to network programming. He has worked for various IT companies since
1989. He was an active USENET contributor in the early 1990s and has
been working mainly on Unix/Linux platforms since 1995.
Currently, he is employed as a senior scientific programmer in
Amsterdam, the Netherlands, at Nikhef, the institute for subatomic
physics from the Dutch Foundation for Fundamental Research on
Matter (FOM). He works on multi-core and many-core computing
systems and grid computing as well as smartcard applications. His open
source interests include all types of virtual private networking, including
IPSec, PPTP, and, of course, OpenVPN. In 2004, he discovered
OpenVPN and has been using it ever since.
His first book was OpenVPN 2 Cookbook by Packt Publishing in 2011,
followed by Mastering OpenVPN, also by Packt Publishing, in 2015.