I have wireguard (server) up and running on CentOS 7, but I have it only on IPv4 at the moment. 

Like OpenVPN on the same box, I would like to have IPv4 and IPv6 on it (for the IPv6, I use HE). 

My config file is the /etc/wireguard/wg0.conf. What would I need to add to this file to get IPv6 going as well? 

ta, t.