Introduction: The Locked Lobby

If you own an Xbox or PlayStation, you've likely seen the dreaded error: "You cannot join this party due to a Strict NAT type." This has nothing to do with your internet speed. It is entirely about how your home router manages your Local IP Address.

The Three NAT Types

Type 1 (Open): Your console is connected directly to the internet with no firewall. You can connect to anyone. (Rare and insecure).
Type 2 (Moderate): Your console is behind a router, but the router correctly forwards multiplayer ports. You can play with almost anyone. This is the goal.
Type 3 (Strict): Your router blocks all incoming connections. You can only play with people who have an 'Open' NAT. You cannot host matches or join most voice chats.

The Fix: UPnP or Port Forwarding

To fix a Strict NAT, you must log into your router. You can either enable **UPnP** (easy, but less secure) or assign your console a 'Static IP' and manually set up **Port Forwarding** for the specific game you are playing.

Conclusion

A 'Strict NAT' means your router is doing its security job *too* well. A few simple adjustments will get you back in the game. View your network details here.