To connect to your Linux databox remotely via the HTTP protocol, you should use port 80 (the default HTTP port) instead of 3000.
If you’d prefer to use port 3000 for remote HTTP access, you will need to create a Port Forwarding rule in the router’s WebUI. You can do this by navigating to Network → Firewall → Port Forwards. To access 192.168.1.161 from the WAN on port 3000, please refer to the screenshot below:
If you plan to access the device remotely via HTTP using Port Forwarding, you won’t be able to reach 192.168.1.161:3000 directly through a browser. Instead, you will need to use the public IP address of your router along with port 3000.
Additionally, could you clarify why port 80 wasn’t used in the RMS remote HTTP access settings instead of port 3000? Port 80 would typically provide a simpler and more convenient way to access the device remotely over the HTTP protocol.