March 2017
Intermediate to advanced
178 pages
3h 48m
English
Content preview from Troubleshooting 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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Single thread
A final, significant item to note is that OpenVPN is single-threaded (inclusive of OpenVPN 2.4). Regardless of how many processors or threads provided by the CPU, OpenVPN will be limited to a single thread. In various tests in recent years, a realistic limit of about 200 client connections is considered the maximum before performance falls off considerably.
It is possible to work around this limitation using load balancing across multiple OpenVPN server instances. These scenarios are more complicated as they require the administrator do additional configuration to ensure the two (or more) instances are able to communicate and clients are able to connect to the appropriate server(s).
The inclusion of AES-NI helps with this single-threading, ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.