No private citizen has enough money to fund their own DNS and fiber backbone like a few people in Europe or USA can. The countries you mentioned have the State control all the DNS servers and fiber channels that ingress/egress the country because they control all the money, so they can simply disconnect power supply to the facilities and put the maintenance employees on furlough to completely shut off the network.

Next question.

[–] rainwall@piefed.social 2 points 6 days ago (1 children)

Its not even that complicated. Just apply an allowlist firewall that only allows the elites access, or in a full blown outage, power off the core switches at the fiber ingress points.

With SDN, you could even just wipe the configs to disable the internet, and then reapply the config to bring them back up later. Could literally be setup as a "push button" if anyone wanted it configured that way.

[–] BaroqueInMind@piefed.social 1 points 6 days ago (1 children)

A layer 3 firewall whitelist can be bypassed with MAC spoofing or duplication, ARP table poisoning, DHCP lease timestamp forging?

[–] rainwall@piefed.social 1 points 6 days ago* (last edited 6 days ago)

Maybe If you can get to it. Power down all the trunk ports but the palace/military/etc.