1, unable to access the external network. At this time, we must first judge whether we have changed the ip or WEB port number after getting the computer. If it has not been modified, look at the tips on the webpage when visiting the external network. If the prompt is that the web page cannot be displayed, it means that this computer has not done router port forwarding (port mapping). At this time, we only need to set it in the router.

2. If you change your ip and network port number, you should have a look. There is a login name under DDNS, and the default login name is "* * * *&; Port = 80 & Ampvertype = 904 "(* * * indicates the fuselage code). "80" is the network port number. Check whether this port number is consistent with the WEB port number you changed. If not, please make the same change, provided that the router port forwarding (port mapping) has been completed.

1: Can I log on to the LAN? If yes, please confirm whether the domain name is entered correctly.

2. Is the port mapping correct?

3. Whether the port mapping is successful or not, be sure to pay attention to whether there is a router on the set router, and if there is, map the device ports on the top router. Mapping the ports of a router from a superior router usually occurs in a metropolitan area network. Therefore, when mapping ports, we must understand the broadband properties.

4: Is the DMZ host on the router turned on? If it is, turn it off. Is UPNP on the router turned on? If so, please turn it off.