In order to connect to a VPN server you will need to install OpenVPN, an open-source VPN package from OpenVPN Technologies. If you are using a modern desktop environment such as Gnome, KDE, Unity etc. the easiest way to use OpenVPN is with the popular NetworkManager GUI. You may wish to run OpenVPN as a service or directly from a terminal in a headless environment. Alternatively you may wish to use IPSec with IKEv2 instead of OpenVPN. Review the table below and follow the relevant setup guide.