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AWS ECS services should not have public IP addresses assigned to them automatically

This control checks whether AWS ECS services are configured to automatically assign public IP addresses. This control fails if AssignPublicIP is enabled.

How to fix

Attribute network_configuration[0].assign_public_ip of aws_ecs_service must be false.

Implementation options

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

Option 1: 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_ecs_service.

resource "aws_ecs_service" "this" {
  name = "pofix-example-service"

  network_configuration {
    assign_public_ip = false
    subnets          = ["subnet-abc123", "subnet-def456"]
  }
}
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: ecs_service_not_publicly_accessible

  • Checkov Check: CKV_AWS_333

  • Powerpipe Control: aws_compliance.control.ecs_service_not_publicly_accessible