Identity Domain Administrators and Service Administrators, by configuring a whitelist or a blacklist, can control whether Internet Protocol (IP) addresses belonging to a network can connect to an environment.
A whitelist contains rules that define which IP addresses can access an environment while a blacklist contains rules that exclude IP addresses from connecting to an environment.
You use the Service Details screen of My Services to create whitelist or blacklist rules to regulate how users access an environment. While creating rules, the Domain Administrator or Service Administrator identifies individual IP addresses, a range of IP address, subnets/masks, or Classless Inter-Domain Routing (CIDR) to identify the addresses that are allowed or denied access to the environment.
See "Managing Internet Protocol Whitelist and Blacklist Rules" in Managing and Monitoring Oracle Cloud.