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Mastering OpenVPN

You're reading from Mastering OpenVPN Master building and integrating secure private networks using OpenVPN

Product type Paperback

Published in Aug 2015

Publisher Packt

ISBN-13 9781783553136

Length 364 pages

Edition 1st Edition

Tools

OpenVPN

Concepts

Networking

Authors (2):

Jan Just Keijser

Eric F Crist

View More author details

Table of Contents (17) Chapters

Mastering OpenVPN

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Preface

1. Introduction to OpenVPN FREE CHAPTER

2. Point-to-point Mode

3. PKIs and Certificates

4. Client/Server Mode with tun Devices

5. Advanced Deployment Scenarios in tun Mode

6. Client/Server Mode with tap Devices

7. Scripting and Plugins

8. Using OpenVPN on Mobile Devices and Home Routers

9. Troubleshooting and Tuning

10. Future Directions

Index

Using IPv6

With OpenVPN 2.3 came solid support for IPv6, both within the OpenVPN tunnel as well as for transit of the tunnel itself. OpenVPN all the way back to 1.x had rudimentary support for IPv6, which was largely rewritten. Overall, inside an OpenVPN tunnel an administrator can choose to support Ethernet (layer 2), IPv4 (layer 3), and IPv6 (layer 3).

The diagram illustrates the logical relationship of the transit network path and the protected network path. Only a single transit method needs to be used, and a single OpenVPN configuration can contain both IPv4 and IPv6 --remote entries. All traffic, regardless of type, will be protected within the tunnel. It is perfectly acceptable to have an all-IPv6 tunnel, using IPv6 for both transit and protected traffic. With additional routing and proxying, it’s even possible to use OpenVPN to aid in IPv6 to IPv4 translation.

Protected IPv6 traffic

Building on the examples from the previous section, we can provide IPv6 addresses to clients and protect...

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Authors (2)

Jan Just Keijser

Jan Just Keijser

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.

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Eric F Crist

Eric F Crist

Eric F Crist hails from Cottage Grove, Minnesota, and he works as a product and systems engineer for Abbott. He has a relatively wide range of professional and life experience starting from physical security and access control as a low-voltage technician into software development, system administration, and software development. Eric has been a core member of the OpenVPN community since 2008 and helps manage the open source online resources. He also wrote ssl-admin, and he is a lead for Easy-RSA, both of which help manage Certificate Authorities and chains. Eric collaborated with Jan Just Keisjer for the book, Mastering OpenVPN, in 2015, also for Packt.

See other products by Eric F Crist

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