1. Open the browser of the computer and enter the management address of Guang Mao.

2. In the light cat management interface, enter the administrator account and password and log in to the light cat management page.

3. In the management page, find options such as port mapping or port forwarding, and then click Enter.

4. On the port mapping or port forwarding page, find port 23, fill in its corresponding intranet IP address and port number, and then save the settings.