OpenSearch domain should have node-to-node encryption enabled

What it checks

OpenSearch domain: node-to-node encryption is not enabled.

Where it applies

Terraform: aws_opensearch_domain, aws_elasticsearch_domain

CloudFormation: AWS::OpenSearchService::Domain, AWS::Elasticsearch::Domain

How to fix it

1. Set node_to_node_encryption { enabled = true }. Cannot be changed on a running domain — requires recreation.

Frameworks

• AWS FSBP Opensearch.3
• SOC 2 CC6.7
• HIPAA 164.312(e)(1)

These mappings are advisory, not an attestation of compliance.

Vendor documentation

All rules