1. Make sure you are connected to the mobile light cat's network.

2. Open the browser and enter the default IP address of the light cat. The default IP address of the mobile light cat is 192. 168. 1 or192.168.0.1.

3. After entering the default IP address of Guang Mao in the browser, you will jump to the management interface of Guang Mao. Enter the super administrator account and password to log in. The super administrator account and password have not been set, so you can use the default account and password, that is, admin/admin or admin/password.

4. After logging in successfully, find the relevant setting options under "Advanced Settings", "Network Settings" or similar menus.

5. In the setting options, find the function of port mapping or port forwarding.

6. On the page of port mapping or port forwarding, find the corresponding ports 3 and 4 and set them accordingly. You need to fill in the corresponding intranet IP address and port number. Intranet IP address is the LAN IP address assigned when your device is connected to Optical Cat, and the port number is the port number that you want to remove restrictions.

7. After setting, save and apply the changes.

8. Restart the light cat to make the settings take effect. You can find the restart option in the light cat management interface and click the restart button.