OpenVPN in Gigabit networks

With the advent of high-speed networks, the need for a high-speed VPN has also increased. OpenVPN is not particularly built for high speeds, but with modern hardware and the right encryption ciphers it is possible to achieve near-gigabit speeds with OpenVPN 2.4. This recipe will show you how to achieve these speeds.

Getting ready

We use the following network layout:

The client used in this recipe was a laptop with a Core i7-4810 processor with a maximum Turboboost speed of 3.8 GHz. The server was a server with an Xeon E5-2697A v4 processor with a maximum Turboboost speed of 3.6 GHz. Connect the client and the server both to a Gigabit Ethernet switch. Set up the client and server certificates using the Setting up the public and private keys recipe from Chapter 2, Client-server IP-only Networks. For this recipe, the server computer was running CentOS 6 Linux and OpenVPN 2.4.0. The client was running Fedora 22 Linux and OpenVPN 2.4.0. Keep the configuration file basic...