Differences between a public and internal IP address
The public IP address of your network is a unique number assigned by Google Fiber. All incoming and outgoing traffic (such as email, texts, web searches, and so on) uses that externally facing public IP address.
The internal IP address of a device on your network is a unique number in a series that is assigned by the Network Box when that device connects to your Google Fiber home network. All devices on your network, including those wired to the Network Box or a TV Box and those connected wirelessly, are assigned IP addresses by the Network Box.
The Network Box assigns IP addresses in numerical order (for example, 192.168.1.2, 192.168.1.3, and so on) and reassigns IP addresses after they are released by devices that are turned off or leave the area covered by the network. So the IP address of a particular device is not necessarily the same every time it connects.
Generally, you do not need to know the IP address of a device. However, you can determine the IP address of any device on your network or your public IP address, if you care to do so.
Open a web browser (such as Chrome, Firefox, or any browser of your choice).
Sign in to Fiber using the email and password you use for your Fiber account.
Select Network at the top-left corner. (If you don’t see it, click the navigation menu to display the selection.)
Your Google Fiber devices appear on the navigation pane on the left, and the configuration options appear on the right.
In the navigation pane on the left, select the device whose IP address you want to know.
if you don't see the IP address, select the Advanced dropdown to show the IP address for that specific device.
Technical details about that device appear in the settings pane on the right. The IPv4 address is the common form of IP address. If an IPv6 address has been assigned to the device, that address is also listed.
You can also determine the internal address of your TV Box using your Google Fiber remote. This is the only internal IP address you can access using your remote.
To determine the internal IP address of your TV Box using the Fiber remote:
Press menu; then navigate to Settings > Help & Info > System Info. The System Info screen displays the IP address of your TV Box at the top of the screen.