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I think I’d mostly agree with you if only one layer of NAT is in play, but in reality we have CGNAT and it makes it supremely difficult to host services without

I think I’d mostly agree with you if only one layer of NAT is in play, but in reality we have CGNAT and it makes it supremely difficult to host services without a very cooperative ISP (laughable.) And there are more internet subscribers in the world than there are IP’s for them, so CGNAT is required for at least some unfortunate part of the population. In reality we just really do need more IP’s. 32-bit addresses with 16 bits of ports isn’t enough.

otabdeveloper4 2y ago
> makes it supremely difficult to host services without a very cooperative ISP Sadly, that's a feature, not a bug. Two layers of NAT sucks, but I guess it could have been avoided if a designed (instead of ad-hoc) solution to the problem was devised. > And there are more internet subscribers in the world than there are IP’s for them Is this really true, did somebody actually run the business math? "Internet subscriber" roughly corresponds to "household", not to "person".