: Only allows traffic from external hosts the internal user has previously contacted.
The query typically refers to a specialized tool called NatTypeTester , which is often distributed as a compressed file (e.g., NatTypeTester.7z ). This tool is primarily used by gamers and network administrators to identify the type of Network Address Translation (NAT) their router is using, which directly impacts online multiplayer connectivity. Core Features of NatTypeTester
: Reducing NAT restrictions helps prevent packet loss and high latency during peer-to-peer (P2P) sessions. Technical Context Nat.7z
: Players with "Open" NAT can host games and connect to any other player.
: Often tests if Universal Plug and Play (UPnP) or NAT Port Mapping Protocol (NAT-PMP) are correctly opening ports. Why It Matters for Gaming : Only allows traffic from external hosts the
The primary function of this utility is to diagnose NAT behavior to ensure "Full Cone" (often called or Open NAT ) for optimal gaming performance. NAT Type Detection : Identifies whether your network is:
: Allows all incoming traffic from any external host to a mapped internal port. Core Features of NatTypeTester : Reducing NAT restrictions
: Maps a unique external port for every unique destination, making it the most restrictive for gaming.