An IP certificate requires port 80 on the server IP to be reachable. As shown in the image, the IP must be directly accessible before the certificate can be activated.
If the server is located in mainland China, please apply to your provider for IP certificate validation access, or have the IP filed (ICP).
Servers outside mainland China are not affected. Please make sure the content on the IP can be accessed.
Certum supports port 80 only
Sectigo supports both port 80 and 443. Please choose the brand according to your own server.