Port forwarding/Port opening
When enabled, port forwarding (IPv4) and port opening (IPv6) let traffic from the outside world (the internet) pass through the Google Wifi firewall to a specific device on your home network. Don’t worry: this only happens when you turn it on and only with a device of your choosing.
Set up port forwarding/port opening
1. Open the Google Wifi app.
2. Tap the tab, then Network & general.
3. In the ‘Network’ section, tap Advanced networking.
4. Tap Port management.
5. Choose the tab for the type of IP address you’re forwarding, IPv4 or IPv6.
6. Select the device you want from the list and tap Next.
6. For IPv4: Enter the WAN starting port, then the port range.
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 TCP, UDP, or TCP and UDP. These are different protocols used to send data over the internet.
8. Tap Done.
Typically, a router protects your network from the outside world by limiting external access to your internal network. (External access is very limited -- just enough to let you use the internet.)
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 point(s) and your devices using UPnP. Read on if you want to manually configure ports.
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 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 see your port forwarded devices from inside your home Wi-Fi.
To use NAT Loopback, just set the appropriate port forwarding rules for the desired device and you’re all set.