August 2015
Intermediate to advanced
364 pages
7h 35m
English
Content preview from Mastering OpenVPNBecome 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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Adding extra security
The initial set of configuration files is a good starting point for a client/server deployment. However, for a production-level system, we want to add more security. Security can be enhanced in two ways:
- By adding
tls-authkeys - By checking the extended key usage attributes of the certificates used
Using tls-auth keys
In the client/server mode, OpenVPN will attempt to establish a TLS control channel for each client that tries to connect. Setting up a TLS control channel is resource consuming, which makes OpenVPN susceptible to denial-of-service attacks: an attacker could launch a multitude of misconfigured clients that all try to connect to the OpenVPN server. For each of these, the OpenVPN server would attempt to set up a TLS ...
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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.