I solved it this way, taking my company's router as an example. Using TP-LINK, enter the IP address of the router in the IE address bar, enter the router setup wizard, and select-forwarding rule-virtual server-add new entry-there are five options:

Noun resolution: Virtual server defines the mapping relationship between WAN service port and LAN server, and all access to WAN service port will be relocated to LAN server specified by ip address.

1, server port number: 3389 (if there are multiple ports, you need to add a "-"sign).

2.IP address: enter the IP address of the computer in the local area network that needs to be mapped to the external network, for example, 192.4438+068.2.88.

3.Protocol: all (all protocols) defaults to TCP and UDP protocols, TCP: transmission control protocol；; UDP: User Datagram Protocol, English name: user datagram protocol.

4. Status: valid and invalid.

5. Public service port number: The router lists some public service port numbers, such as http-80.

FTP-2 1 etc. If the port you want to map is the service provided in this option, directly select the service name, and the port number will appear automatically, if it is not added manually.

Because the router brands are different, the settings are a little different, but they are still the same. Try it first and see if there is anytHIng in hi.