Log in to the router management interface and click "Application Management" to enter the application center, as shown in the following figure:

2. Find the virtual server and click "Enter", as shown in the following figure:

3. Add mapping entries and rules

Click the Add button, as shown in the figure below:

4. Enter the parameters of the server to be mapped, as shown in the following figure:

5. External ports: External ports are open ports, that is, ports used by Internet access servers.

The added list is as follows:

6. Access the virtual server on the external network.

According to the above settings, clients in the Internet can access the web server in the intranet through "WAN IP address+external port number" (taking WAN IP address121.202.33.100, external port number 8080 as an example), and the access forms are as follows: