Comment by AtlasBarfed
6 days ago
Isn't CGnat due to IPv6 use on the mobiles? You could quit and say that's an IPv6 problem that didn't get solved in the IPv6 engineering
6 days ago
Isn't CGnat due to IPv6 use on the mobiles? You could quit and say that's an IPv6 problem that didn't get solved in the IPv6 engineering
IPv6 is used on mobile networks since there aren't enough IPv4 addresses. Some of these mobile networks are so big there aren't even enough private IPv4 addresses for their CG-NAT private side to fit, leaving the only clean solution being NAT64/DNS64.
Why would CGNAT be deployed as a response to IPv6 on mobile? I don't understand the logic there. CGNAT is deployed due to a shortage of publicly routable IPv4 addresses. IPv6 was introduced due to having much larger publicly routable space.
Because the internet as a whole is ipv4. The mobiles are IPv6. The ipv4 internet does not care about any server running on any mobile device.
Thus, CG Nat was invented so that IPv6 could talk to IPv4 and get the information from it.
No, CGNAT (Carrier-Grade NAT - https://en.wikipedia.org/wiki/Carrier-grade_NAT) is an IPv4 only thing. https://www.rfc-editor.org/rfc/rfc6598 specifies they should use 100.64.0.0/10 for it, to avoid conflicting with the pre-existing private-use ranges. IPv6 removes the need for using CGNAT, as each home router is allocated a public IP (rather than a CGNAT IP) on its public link.
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No, NAT64 was invented so v6-only hosts could access v4-only resources. CGNAT was invented so v4 hosts can have a v4 address without having to purchase limited public address space.