NEXUS
NAT Type Analyzer
Detection Data
ANALYZING...
NAT Classification
| Type | P2P | TURN |
|---|---|---|
| Full Cone | SUPPORTED | NO |
| Address Restricted | SUPPORTED | NO |
| Port Restricted | PARTIAL | RECOMMENDED |
| Symmetric | BLOCKED | REQUIRED |
System Log
EXPANDNAT Type Explained
Full Cone
Once mapped, ANY external host can send data in. Like an open door.
Address Restricted
Only allows IPs you've contacted before. Port doesn't matter.
Port Restricted
Only allows specific IP:Port pairs. Most common type.
Symmetric
Different port for each destination. Very hard to traverse.
P2P Success Rate Matrix
Success rate when both peers attempt direct connection
Use Cases
Online Gaming
P2P multiplayer requires good NAT. Symmetric NAT may force relay connections, increasing latency.
Video Calls
WebRTC video calls use ICE/STUN/TURN. Most NAT types work with TURN fallback.
File Sharing
P2P file transfer (like torrents) needs incoming connections. Symmetric NAT blocks this.
Remote Access
Accessing home devices remotely requires port forwarding or UPnP with restrictive NAT.
FAQ
Symmetric NAT assigns a different external port for each destination you connect to. This means the port you learned from one STUN server won't work for another peer. Without port prediction or a TURN relay, direct P2P connection is nearly impossible.
Yes! You can often improve your NAT type by: 1) Enabling UPnP on your router, 2) Setting up port forwarding, 3) Placing your device in the router's DMZ (not recommended for security), or 4) Using a VPN with port forwarding support.
A TURN (Traversal Using Relays around NAT) server acts as a relay when direct P2P connection fails. Your traffic goes through the TURN server, which adds latency and bandwidth costs, but ensures connectivity even with Symmetric NAT.
NAT type can change due to: router firmware updates, ISP changes, different network paths, or router configuration changes. Some ISPs use Carrier-Grade NAT (CGNAT) which can make your NAT type worse than expected.