I imagine they have CGNAT already. But you can run servers that only assist users to establish a connection handshake from behind CGNAT, then all traffic happens peer to peer.

Now, whether the ISPs can get away with blocking that handshake is another story...

[–] Swedneck@discuss.tchncs.de 1 points 11 months ago (1 children)

you can use p2p services behind cgnat, like how do you think torrent works?

[–] redcalcium@lemmy.institute 1 points 11 months ago (1 children)

I'm behind cgnat myself and I can download but can't seed. If everyone is behibd cgnat the swarm would be dead fast. In Korea, there are only 3 ISPs and if they collude to use cgnat with client isolation, they can kill these P2P scheme used by streaming site and boost their profit sharing revenue.

[–] Swedneck@discuss.tchncs.de 1 points 11 months ago (1 children)

not sure where you're getting that from, all you need is some server to establish connections via and then it works mostly fine

[–] redcalcium@lemmy.institute 1 points 11 months ago

We're still taking about Korean ISP charging streaming company for bandwidth, right? If the streaming service setup some TURN servers to help people behind cgnat, then they'll going to get charged by the ISP because the traffic originate from TURN servers operated by the streaming service instead of peer-to-peer traffics among users. These ISPs rejected Netflix offers to put their caching servers inside their network afterall, so the TURN servers will have to be located outside their network and thus subject to the bandwidth charge.