Port forwarding or port opening

When enabled, port forwarding (IPv4) and port opening (IPv6) let traffic from the outside world (the internet) pass through the Google Nest Wifi firewall or Google Wifi firewall to a specific device on your home network. 

Learn more about when you need port forwarding or port opening and NAT loopback.

Set up port forwarding or port opening

  1. Open the Google Home app Google Home app.
  2. Tap Wi-Fi  and then Settings  and then Advanced Networking.
  3. Tap Port management and then Create new port management rules .
  4. Choose the tab for the type of IP address you're forwarding, IPv4 or IPv6
  5. Select the device you want from the list and tap Next.
  6. Add your internal and external ports.
    1. For IPv4: Choose an internal port used by the device on the local network and an external port on the WAN. You can enter a single port # or a range ####-####. 
      • Note: When entering a port range internal and external ranges need to be the same. This is not the case for single port forwarding.
    2. For IPv6: Enter the port range.
      • Note: Some devices will suggest what ports to use, while others let you choose. If you don’t know which ports to forward, contact the manufacturer of the device or check their manual.
  7. Choose either Transmission Control Protocol (TCP), User Datagram Protocol (UDP), or TCP and UDP. These are different protocols used to send data over the internet.
  8. Tap Done.
When do I need port forwarding or port opening?

Typically, a router protects your network from the outside world by limiting external access to your internal network.

But some devices and programs like IP cameras and online games need a connection from the outside internet that’s unimpeded by a firewall. In most cases, port forwarding (for IPv4) and port opening (for IPv6) are configured automatically between your Wifi devices and your connected devices using Universal Plug and Play (UPnP)

But you don’t want all your devices to have an open connection, because that’s not secure. The solution is port forwarding. Port forwarding tells a router: When a connection request comes through a specific port (that you specify), send that connection to a specific device (of your choosing). Your other devices will remain unaffected by this rule. Learn how to set up port forwarding.

NAT Loopback

NAT loopback lets devices on your private Wi-Fi (like a laptop or IP camera) communicate with a public network (WAN). This lets them “share” a connection with each other. This means you’ll be able to check your port forwarded devices from inside your home Wi-Fi.

To use NAT loopback, set the appropriate port forwarding rules for the desired device and you’re all set.

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