Network setup problem: This reason is more common when you need to manually specify the networking mode of IP, gateway and DNS server and use proxy server to surf the Internet. Check the computer's network settings carefully.

Problems with network firewall: improper setting of network firewall, such as too high security level, IE being accidentally put into the blocked access list, and wrong firewall policy. You can try to check the policy, lower the security level of the firewall or close it directly to see if it is back to normal.

Matters needing attention in the use of campus network

Please confirm the network cable from the wall socket to the computer. If your computer is connected to a router, please also make sure that the network cable connected to the computer is connected correctly (or restart the router after power failure). If you can't guarantee the quality of the network cable, you can use a network cable without quality problems.

Please confirm the network cable from the wall socket to the computer. If your computer is connected to a router, please also make sure that the network cable connected to your computer is connected correctly (or restart the router). If you can't guarantee the quality of the network cable, you can use a network cable without quality problems.