This was long overdue for compatibility reasons. My decision to force
the upgrade now, has been made following recomendations published in
the OpenVPN 2.4 audit performed by Cryptography Engineering LLC.
OpenVPN road warrior installer for Debian, Ubuntu and CentOS.
This script will let you setup your own VPN server in no more than a minute, even if you haven't used OpenVPN before. It has been designed to be as unobtrusive and universal as possible.