Hey @Victoria_Carlin,
Thank you for the detailed follow up! Lets focus on the double-nat situation. I don’t see any mention of a modem in your network setup. Do you have a specific modem model you can share? Or, is the FIOS G3100 acting as a modem/router combo?
Typically, with mesh setups, you have to create two port forwarding rules. One for the modem/router (G3100) to route to other router (Orbi), and another from the other router (Orbi) to the core.
And to confirm, when you bypass the Orbi mesh network and hardwire your core directly to your G3100, Arc functions properly? If so, this sets us up nicely for troubleshooting the Orbi.
For setting up port forwarding on the Obri, please give the below steps a try:
- Find the local IP address of the server on your network that provides the service (IP of your core device). The server must always have the same IP address. To specify this setting, use the reserved IP address feature.
- Launch a web browser from a computer or mobile device that is connected to the network.
- Enter orbilogin.com. The login window opens.
- Enter the router username and password. The user name is admin. The default password is password. The username and password are case-sensitive.
The BASIC Home page displays. - Select ADVANCED > Advanced Setup > Port Forwarding/Port Triggering.
- Leave the Port Forwarding radio button selected as the service type.
- In the Service Name list, select the service name.
If the service that you want to add is not in the list, create a custom service. - In the Server IP Address field, enter the IP address of the computer that provides the service.
- Click the Add button.
The service displays in the list.
Let me know if the above makes sense 