2. Find the computer that can access the system and open the "Command Prompt" window of the computer.
3. Enter the "ipconfig" command in the "Command Prompt" window and press Enter to display and record the IP address of the current computer.
4. In the "Settings" or "Configuration" interface, find the related options such as "External Device" or "Network Settings" to see if you can check the IP address and port number of the external device. You can view and record directly.
5. You can't check the IP address and port number of external devices in the system settings. You can try to check the label or manual of the device itself, which usually indicates the IP address and port number of the device.