Jan Just Keijser - OpenVPN 2 Cookbook

Jan Just Keijser is an open source professional from Utrecht, the Netherlands. He has broad 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 and has been working mainly on UNIX/Linux platforms since 1995. He was an active USENET contributor in the early 1990s.

Currently, he is employed as a senior scientific programmer in Amsterdam, the Netherlands, at Nikhef, the institute for sub-atomic physics from the Dutch Foundation for Fundamental Research on Matter (FOM). He is working on grid computing and grid application programming, 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. He has been providing OpenVPN community support since 2004.

The OpenVPN Cookbook is his first book.

He is interested in nature, science, birds, photography, and fantasy and science-fiction literature.

I would like to thank all the people at Packt Publishing for helping me with writing this book. I would especially like to thank my acquisition editor, Eleanor Duffy, who convinced me to write it in the first place.

I also want to thank my employer, Nikhef, for giving me time off to write it. I mustn't forget my colleagues at the Physics Data Processing group, for sharing their thoughts with me about ideas for yet another recipe.

And I would like to thank my wife for volunteering to get a nice tan beside the swimming pool during our vacation, while I sat in the shade working on my book.

David Sommerseth , Senior Quality Assurance Engineer at Red Hat, has been working with Linux professionally since 1998. During this time, David has completed a range of tasks, from serving in system and network administration roles to developing personalization systems for payment cards and online payment transaction handling. David currently works with the Red Hat Enterprise MRG product, mostly focusing on the real-time kernel and its related tools.

David, who is originally from Norway and currently lives in the Czech Republic, enjoys hacking on open source software and has recently become more involved in the OpenVPN development. David has big plans for his own pet project, eurephia (http://www.eurephia.net/), which is tightly connected to OpenVPN.

I would like to thank the marvelous OpenVPN community members, who continue to give valuable feedback to the project and its developers. I would also like to thank Red Hat, an amazing employer that both sees the value of being involved in open source software and contributes to it. And last but not least, to my wife, for never-ending patience, support, and encouragements.

Krzee King is a self-taught BSD user who has been helping with OpenVPN for more than three years. He wrote one of the most widely used documents on routing lans over OpenVPN, and helps maintain the IRC channel.

I would like to thank Eric Crist for his work on #OpenVPN. To OpenVPN Technologies for joining with the community, which I think we all agree is for the better. To punk for phear and loathing in nl. And, of course, thanks to the Efnet #IRCpimps.

Ralf Hildebrandt is an active and well-known figure in the Postfix community. He's been a systems engineer for T-Systems, a German telecommunications company, and is now employed at Charite, Europe's largest University hospital. He has spoken about Postfix at industry conferences and contributes regularly to a number of open source mailing lists. Together with Patrick Koetter, he has written the Book of Postfix.

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To Vivi: Thanks for putting up with me.