Backburner should work over VPN.
Or any other type of networks.
These days world wide networks are easy to create.
It should be as easy to connect backburner servers/managers as it is to define a unique ID.
Look at torrent technology for inspiration.
https://www.resilio.com/individuals/
Don't tell me IPV6 is incompatible
I should not need a network specialist to get machines to connect over the internet. Just like I dont need a math specialist to create 3d.
Thx.