Symmetric NAT
Definitions
Symmetric NAT is a NAT Traversal and P2P Gaming term for a NAT behavior where the external mapping can change depending on the remote destination, often making peer-to-peer connectivity harder. 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.
“Symmetric NAT kept changing name tags, and the game lobby started side-eyeing the router.”
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