How do I change my NAT type to open?

How do I change my NAT type to open?
If you use Windows, you can use Network Discovery to change NAT:

Click the Start menu button;
Go to Settings;
Click Network and internet;
Choose Wi-Fi;
Then click Change advanced sharing options;
Enable the Turn on network discovery option and check the Turn on automatic setup of network-connected devices box.

If you use Windows, you can use Network Discovery to change NAT:
  1. Click the Start menu button;
  2. Go to Settings;
  3. Click Network and internet;
  4. Choose Wi-Fi;
  5. Then click Change advanced sharing options;
  6. Enable the Turn on network discovery option and check the Turn on automatic setup of network-connected devices box.