If possible, you can try to change the network, change the browser, access the campus network and try again.
Access to the campus network from the external network is usually slow. But if you are a campus intranet, it may be that there is something wrong with the network center of the school. Call and ask.
If you can't get online, it may be that your internet speed is too slow, or there are too many people clicking on this page. The college entrance examination is over, and many people have to go to the school website first. If it is an external network, it is recommended to order it when there are not many people.
Try this, use IE browser, open it, click on the toolbar at the upper right of the menu bar, then select "Compatibility View Settings", finally check "Show all websites in compatibility view", and then try to enter the educational administration system, which should solve it.
This is not the problem of your network at all, nor the problem of ip and protocol, but the problem of the website designer. At present, the educational administration system of most schools is developed by Hangzhou Zheng Fang software. I wonder if yours is. The system platform made by this company generally only supports the entrance of telecommunications, and access to other networks can only be accessed if the website is not updated.