Frootvpn ipv6
Manual IPv6-to-IPv4 tunneling encapsulates an IPv6 packet in an IPv4 packet. So as to not fragment the packet from adding the IPv4 header to it, the data packet needs to be reduced by 20 bytes if the IPv4 has an optional protocol field, or 20 octets if it does not, as well as require routers support both IP stacks.