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🛡️ AWS OpenSearch Domain Node To Node Encryption is not enabled🟢

Logic​

Similar Policies​

Description​

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Description​

This policy identifies AWS OpenSearch Domains that do not have node-to-node encryption enabled.

Node-to-node encryption in AWS OpenSearch Service adds an additional layer of security by using TLS for all communication between nodes in a cluster. This prevents potential attackers from intercepting or reading data as it moves between nodes.

Rationale​

Encrypting data in transit between nodes protects against man-in-the-middle and eavesdropping attacks, even within your VPC. While network-level controls such as security groups provide a first line of defense, node-to-node encryption ensures that traffic between OpenSearch nodes remains unreadable if an unauthorized party gains network access. This is especially important in environments handling sensitive or regulated data.

Audit​

This policy flags an AWS OpenSearch Domain as INCOMPLIANT if the Node To Node Encryption Enabled checkbox is set to false.

Remediation​

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Remediation​

Enable Node-to-node Encryption​

To enable Node-to-node encryption of data, the domain must be running OpenSearch or Elasticsearch version 6.7 or later.

aws opensearch update-domain-config \
    --domain-name {{domain-name}} \
    --node-to-node-encryption-options Enabled=true

Applying node-to-node encryption triggers a blue/green update of the domain, which may cause a brief period of reduced availability or increased latency. Plan the change accordingly.

policy.yaml​

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Linked Framework Sections​

SectionSub SectionsInternal RulesPoliciesFlagsCompliance
💼 AWS Foundational Security Best Practices v1.0.0 → 💼 [ES.3] Elasticsearch domains should encrypt data sent between nodes1no data
💼 AWS Foundational Security Best Practices v1.0.0 → 💼 [Opensearch.3] OpenSearch domains should encrypt data sent between nodes1no data
💼 Cloudaware Framework → 💼 Data Encryption70no data
💼 FedRAMP High Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)237105no data
💼 FedRAMP High Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)49no data
💼 FedRAMP High Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)1825no data
💼 FedRAMP High Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)824no data
💼 FedRAMP High Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)1643no data
💼 FedRAMP High Security Controls → 💼 SC-23 Session Authenticity (M)(H)721no data
💼 FedRAMP Low Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)125no data
💼 FedRAMP Low Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)24no data
💼 FedRAMP Low Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)43no data
💼 FedRAMP Moderate Security Controls → 💼 AC-4 Information Flow Enforcement (M)(H)189no data
💼 FedRAMP Moderate Security Controls → 💼 SC-7(4) External Telecommunications Services (M)(H)49no data
💼 FedRAMP Moderate Security Controls → 💼 SC-8 Transmission Confidentiality and Integrity (L)(M)(H)125no data
💼 FedRAMP Moderate Security Controls → 💼 SC-8(1) Cryptographic Protection (L)(M)(H)24no data
💼 FedRAMP Moderate Security Controls → 💼 SC-13 Cryptographic Protection (L)(M)(H)43no data
💼 FedRAMP Moderate Security Controls → 💼 SC-23 Session Authenticity (M)(H)21no data
💼 NIST CSF v2.0 → 💼 DE.CM-09: Computing hardware and software, runtime environments, and their data are monitored to find potentially adverse events181no data
💼 NIST CSF v2.0 → 💼 ID.AM-03: Representations of the organization's authorized network communication and internal and external network data flows are maintained89no data
💼 NIST CSF v2.0 → 💼 PR.DS-01: The confidentiality, integrity, and availability of data-at-rest are protected187no data
💼 NIST CSF v2.0 → 💼 PR.DS-02: The confidentiality, integrity, and availability of data-in-transit are protected160no data
💼 NIST CSF v2.0 → 💼 PR.DS-10: The confidentiality, integrity, and availability of data-in-use are protected184no data
💼 NIST CSF v2.0 → 💼 PR.IR-01: Networks and environments are protected from unauthorized logical access and usage123no data
💼 NIST SP 800-53 Revision 5 → 💼 AC-4 Information Flow Enforcement3269123no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-7(4) Boundary Protection _ External Telecommunications Services49no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8 Transmission Confidentiality and Integrity5825no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8(1) Transmission Confidentiality and Integrity _ Cryptographic Protection823no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-8(2) Transmission Confidentiality and Integrity _ Pre- and Post-transmission Handling16no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-13 Cryptographic Protection432no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-23 Session Authenticity515no data
💼 NIST SP 800-53 Revision 5 → 💼 SC-23(3) Session Authenticity _ Unique System-generated Session Identifiers14no data
💼 PCI DSS v3.2.1 → 💼 4.1 Use strong cryptography and security protocols to safeguard sensitive cardholder data during transmission over open, public networks.1828no data
💼 PCI DSS v4.0.1 → 💼 4.2.1 Strong cryptography and security protocols are implemented to safeguard PAN during transmission over open, public networks.228no data
💼 PCI DSS v4.0 → 💼 4.2.1 Strong cryptography and security protocols are implemented to safeguard PAN during transmission over open, public networks.2928no data