either buy paying a few bucks for a vps with static v4 or try techniques like "nat hole punching" to keep the cgnat statemachine happy. but tbf it isn't meant to
>billions of ppl access the internet thru nat everyday
A caveat is that a lot of people are knowing or unknowingly relying on things like UPnP and NAT-PMP to have services operating normally under NAT. That conveniently masked a lot of the issues with NAT in P2P usecases such as online gaming and torrenting.
Unfortunately, even that is broken under CGNAT.
The more layers of NAT you put on your connection, the more things you break.
interestingly, i religiously disable upnp/pmp on all residential cpe's that i configure due to it's glaring security implications. never heard of a problem
though i do defend v4-nat internet as the way it was meant to be, being jailed behind a cgnat w/o repercussions would push me to another isp.
In gaming communities e.g. Minecraft you regularly get people asking for port forwarding related questions. Some gamedevs automate that process using UPnP, I believe Eve is one of them.
Neither solution works for me though, as someone whose IPv4 connnectivity is behind a CGNAT.
ALL ISPs in my country have deployed CGNAT so there's no "changing ISP" for me either. IPv6 is the only solution left unless I want to pay a premium to get one of those public IPv4 addresses. Really, single-layered IPv4 NAT can't last forever. The address space of IPv4 is simply too limited.
the push of p2p comms in gaming was never a good idea, but i can totally see how it was sold. apart from that i don't know why any game would need incoming connections.
the upnp cargo cult in gaming is real though, despite the prevalence of cgnat.
i agree that you should have choice but am not yet ready to accept that ~11B ppl cannot manage with ~3B addresses given the typical ratio of users per v4 with nat.
Then it's not internet. Internet means there is no distinction between "servers" and "clients", everyone is a peer.
If you can't host things, you don't have internet. You've just got a modern version of MSN/BTX/Telex/whatever