CGNAT
Definitions
CGNAT is a NAT Traversal and P2P Gaming term for Carrier-Grade NAT, where a service provider translates many customer connections behind shared public IPv4 addresses, often creating problems for inbound and peer-to-peer traffic. It helps people and agents name the signal, source, and safe next step without pretending an automation, campaign, DNS record, RFC, or network path did more than the evidence shows. Source context: RFC 6598 shared address space; RFC 8445 ICE; RFC 1918 private address space.
“CGNAT made the game lobby knock on three doors and still not know which apartment had the controller.”
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