Comment by nulbyte
6 days ago
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.
Oh so cgnat exists for ipv4 addresses to talk to IPv6 servers? Is that what you are telling me?
Because all of the www is in IPv6, and cgnat actually excuses for ipv4 cable users to use the bedrock internet servers and services?
Bullshit. Cgnat is a hack for ipv6 to talk to the ipv4 universe.
Because if there were magically enough iov4 addresses for mobiles, would cgnat exist? No, it wouldn't.
1 reply →
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.