Nat.7z May 2026

: Uses STUN (Session Traversal Utilities for NAT) servers to discover the public IP address and port mapping assigned by your router.

: Only allows traffic from external hosts the internal user has previously contacted. Nat.7z

: Players with "Open" NAT can host games and connect to any other player. : Uses STUN (Session Traversal Utilities for NAT)

: Allows all incoming traffic from any external host to a mapped internal port. Nat.7z

: Often tests if Universal Plug and Play (UPnP) or NAT Port Mapping Protocol (NAT-PMP) are correctly opening ports. Why It Matters for Gaming

: Maps a unique external port for every unique destination, making it the most restrictive for gaming.