Sorry for a little be off topic query. I am checking which VPN solutions are IPv6 compatible outside and inside the tunnel and can so transport with any IPv6/IPv4 connection IPv6/IPv4 internal to then tunnel Maybe somebody made such tests already and can point me to it. What i found so far: Citrix SSL VPN ( seems to have only partial support) https://support.citrix.com/article/CTX233563 https://www.citrix.com/blogs/2010/07/13/are-citrix-products-ipv6-ready/ so IPv6 / IPv6 not yet supported https://support.citrix.com/article/CTX211780 NetScaler Gateway VPN users are not able to resolve IPv4 DNS when their ISP has IPv6 enabled. OpenVPN https://community.openvpn.net/openvpn/wiki/IPv6 No complete example found yet. Wireguard (LINUX only) seems to support it but missing other stuff like hostchecker Cisco SSL VPN https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_conn_sslvpn/configurat... IPv6 Support and Limitations for Pulse Connect Secure Features https://docs.pulsesecure.net/WebHelp/Content/PCS/PCS_AdminGuide_8.2/IPv6%20S... Microsoft Direct access (win7/win10) and new Always on VPN (Win10 only) https://directaccess.richardhicks.com/2018/02/05/what-is-the-difference-betw... https://docs.microsoft.com/en-us/windows-server/remote/remote-access/vpn/vpn... -- --- best regards Christian Bretterhofer