When I first watched that movie, there was a group of guys that would have joined the troopers, judging from at what scenes they cheered.

DS-Lite means full ipv6 access, but ipv4 is NATted by the carrier. If you try to access it from a network that only supports ipv4, the carrier’s NAT will probably block it. If your internal DNS points to the external IPv4, that might cause the problem.