To secure data and guarantee high performance for ApsaraDB for Redis, before you use an ApsaraDB for Redis instance, you must set one or more IP address whitelists or specify up to 10 Elastic Compute Service (ECS) security groups as whitelists. You can add client IP addresses or Classless Inter-Domain Routing (CIDR) blocks to a whitelist. We recommend that you periodically adjust your whitelists to improve the access security protection and secure data in ApsaraDB for Redis.

For more information about how to set IP address whitelists for ApsaraDB for Redis, see Step 2: Set IP address whitelists.