30 Jan 2018 09:24, Tony Langdon wrote to Michiel van der Vlist:
TL> The setup of my network makes it more likely that I could become TL> temporarily IPv6 only (incoming and outgoing), because my BBS IPv4 addresses come TL> via an OpenVPN tunnel, while IPv6 is native.
then make a openvpn on ipv4 when you have ipv6 native :=)
TL> So IPv6 outgoing only can be TL> useful for getting in contact with me if things break. Same for incoming only, TL> because I would lost all IPv6 connectivity in this situation.
it will not break if you can make ipv6 tunnels on top of ipv4, you could make ipv4 tunnels on top of ipv6 aswell