On a WAN I have 5 different locations connected by point to point T1s via Cisco 2801s, with one central location routing each location to all the others, sort of a star configuration.
The routers' iOS is too old and doesn't support IPv6, so in order to get some testing done using ULAs, I wanted to essentially tunnel over them and at each location have a FreeBSD server serving as a sort of tunnel broker, or something, and a gateway for the IPv6 machines at said locations.
I'm new to IPv6, but I can't seem to find examples or proper terms for exactly what I'm interested in doing. I can find examples of FreeBSD gateways and external tunnel broker connections, but nothing for routing IPv6 across your own IPv4 WAN.
Any insights would be greatly appreciated.