I was told once by random people on the internet that Iran has a whitelist internet policy, so much stricter (and easier to implement) than blacklist policies like the GFW. I guess this isn't true. Can someone give me a rundown on Iran Internet censorship?
Lol no way, Iran didn't ban Instagram until 2022 and WhatsApp until yesterday (!!!).
From what I know, China GFW is root level control. Every connection in and out of China travels through very few data links and traffic is routed internally as much as possible. Even foreign websites mostly operate with Chinese mirrors ie Microsoft Bing China is physically in China.
Almost no data links go to the west directly either, and instead they use Russia, Hong Kong and Japan as buffers.
The degree of control is very fine too. The fact that they can tighten control during politically sensitive times means that they actually know exactly what internet activity is happening and even gray zone activities.