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:

  • For example, 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. indicates the IP network segment in the range of to


  1. On the Domain Names page, select a domain name and click Configure.
  2. Go to Access Control > IP Blacklist, and click Modify.
  3. Configure the IP blacklist and then click OK.