CDN supports the blacklist rules. An IP address that is listed on the blacklist cannot access the corresponding domain.


You can use an IP network segment to add IP addresses to the blacklist.
 For example, 24 indicates that the first 24 bits in the subnet mask are used as effective bits, for example, 32-24=8 bits are used to express host numbers. In this way, the subnet can accommodate 2 ^ 8-2 = 254 hosts. And indicates the IP network segment scope of


Enter the CDN domain name overview page, go to Domain Names page, select the domain name that you want to set up, and click Configure.