OpenVPN and IPv6

OpenVPN can connect a site-to-site tunnel to either an IPv4 address or an IPv6 address and both IPv4 and IPv6 traffic may be passed inside of an OpenVPN tunnel at the same time. IPv6 is supported both in site-to-site and mobile clients, and it can be used to deliver IPv6 to a site that only has IPv4 connectivity. In order to ensure mobile client support for IPv6, obtain the client software from the OpenVPN client export package, or download a client based on OpenVPN 2.3 or newer.