February 2017
Intermediate to advanced
400 pages
7h 35m
English
Content preview from OpenVPN Cookbook - Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Multiple secret keys
As stated in the previous recipe, OpenVPN uses two symmetric keys when setting up a point-to-point connection. However, it is also possible to use shared yet asymmetric keys in point-to-point mode. OpenVPN will use four keys in this case:
- A cipher key on the client side
- An HMAC key on the client side
- A cipher key on the server side
- An HMAC key on the server side
The same keying material is shared by both sides of the point-to-point connection, but the keys that are derived for encrypting and signing the data are different for each side. This recipe explains how to set up OpenVPN in this manner and how the keys can be made visible.
Getting ready
For this recipe, we use the secret.key file from the previous recipe. Install OpenVPN ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.