DCDN supports blacklist rules. An IP address that is listed on the blacklist cannot access the corresponding domain.
IP blacklist currently supports blacklisting entire IP address ranges, for example: 127.0.0.1/24.
For example, 127.0.0.1/24. 24 indicates that the first 24 bits in the subnet mask are used as effective bits,and 32-24=8 bits are used to express host numbers. In this way, the subnet can accommodate 2 ^ 8-2 = 254 hosts. 127.0.0.1/24 indicates the IP network segment in the range of 127.0.0.1 to 127.0.0.255.
On the Domain Names page, select a domain name and click Configure.
Go to Access Control > IP Blacklist, and click Modify.
Configure the IP blacklist and then click OK.