Overview
NAT (Network Address Translation) lets many devices share one public IP. Your NAT type — Open, Moderate, or Strict — affects online gaming, voice chat, and peer-to-peer connections. This guide explains the types and how to open your NAT.
Key Takeaways
- NAT type describes how open your connection is to incoming peers.
- Open NAT gives the best connectivity; Strict NAT causes problems.
- Port forwarding and UPnP are the main ways to open NAT.
- Double NAT from two routers often causes a strict type.
Check and Improve Your NAT
1. Check your NAT type in your game or console network settings.
2. Enable UPnP on your router so apps can open ports automatically.
3. If needed, set up port forwarding for the specific app or game.
4. Restart the router and re-test the NAT type.
Fix Double NAT
1. Check whether you have two routers or a modem-router plus another router.
2. Put one device in bridge mode to eliminate the second NAT layer.
3. Alternatively, place your main router in the other’s DMZ.
4. Re-test to confirm the NAT type improved.
Warning: Port forwarding exposes specific ports to the internet. Forward only the ports an app needs and avoid opening ranges you do not require.
Troubleshooting
Problem: NAT stays strict after enabling UPnP.
Solution: Set up manual port forwarding for the app, and check for double NAT from a second router.
Problem: You have two routers.
Solution: Put one in bridge mode so only a single device performs NAT.
Problem: Port forwarding has no effect.
Solution: Assign the device a static local IP so the forwarded ports always point to it.
Problem: NAT type varies between games.
Solution: Each app uses different ports; forward the specific ports listed by that game.
Conclusion
Your NAT type shapes how well real-time and peer-to-peer apps connect. UPnP or targeted port forwarding — and eliminating double NAT — will move you toward an Open NAT.
About TechHub
This guide is part of the TechHub Knowledge Base. For more step-by-step IT guides and support, visit techhub.com.lk.
