Set EASYRSA_CRL_DAYS to 3650 instead of the default 180.
OpenVPN 2.4+ enforces the nextUpdate value in the CRL as a hard limit,
and will not work if more than 6 months passed since it was generated.
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.