ElastiCache for Redis replication groups before version 6.0 should use Redis Auth¶

This control checks if ElastiCache for Redis replication groups has Redis Auth enabled. The control fails for an ElastiCache for Redis replication group if the Redis version of its nodes is below 6.0 and AuthToken isn't in use.

How to fix¶

Attribute auth_token of aws_elasticache_replication_group must be non-empty.

Implementation options¶

Choose the option that matches how you manage Terraform. All options satisfy this control.

Option 1: Open source module (`terraform-aws-modules`)¶

If you use terraform-aws-modules/elasticache/aws, configure the required module inputs to satisfy this control. You can later migrate to the compliance.tf module with minimal changes because it is compatible by design.

module "elasticache" {
  source  = "terraform-aws-modules/elasticache/aws"
  version = ">=1.0.0,<2.0.0"

  description          = "Redis cluster"
  engine               = "redis"
  engine_version       = "7.1"
  node_type            = "cache.t3.micro"
  num_cache_clusters   = 2
  replication_group_id = "abc123"
  subnet_ids           = []
  vpc_id               = ""
}

Option 2: Terraform AWS provider resources¶

If you manage resources directly, configure the relevant Terraform AWS provider resources to meet this control. See docs for the resources involved: aws_elasticache_replication_group.

resource "aws_elasticache_replication_group" "this" {
  at_rest_encryption_enabled = true
  auth_token                 = "PofixExampleAuthToken32CharsLng"
  description                = "pofix example replication group"
  replication_group_id       = "pofix-example"
  snapshot_retention_limit   = 15
  transit_encryption_enabled = true
}

Which option should I choose?

Compliance.tf module (recommended): controls enforced by default and mapped to frameworks.
Open source module (terraform-aws-modules): compatible by design with compliance.tf. Same variable names for an easy, low-change migration path when you are ready.
Terraform AWS provider resources: manage Terraform resources directly.

Tool mappings¶

Use these identifiers to cross-reference this control across tools, reports, and evidence.

Compliance.tf (CTF) Control: elasticache_replication_group_redis_auth_enabled
AWS Config Managed Rule: ELASTICACHE_REPL_GRP_REDIS_AUTH_ENABLED
Powerpipe Control: aws_compliance.control.elasticache_replication_group_redis_auth_enabled