BRACKETOLOGY | FEDRAMP

SC-21: SECURE NAME / ADDRESS RESOLUTION SERVICE (RECURSIVE OR CACHING RESOLVER)

FedRAMP Baseline Membership SC-21:
LOW
MODERATE
HIGH

How Do I Use This Page for FedRAMP Cloud Security

FedRAMP Bracketology

Use the FedRAMP Control Membership information above to determine if a control or control enhancement is required for each Impact Baseline — LOW, MODERATE, or HIGH

Click on the panel below each control or control enhancement to review the FedRAMP Impact Baseline-specific control configuration requirements for each of the [BRACKETS] in each control and/or control enhancement.

Review and use Additional Requirements and Guidance to build FedRAMP-compliant controls for your risk-based cybersecurity program.

To change the baseline view in the panel, click on LOW, MODERATE, or HIGH when the panel is open

Panels only appear where there are [BRACKETS] in the control or enhancement or where there is FedRAMP-specific requirements or guidance available.

The information system requests and performs data origin authentication and data integrity verification on the name/address resolution responses the system receives from authoritative sources.

SUPPLEMENTAL GUIDANCE

Each client of name resolution services either performs this validation on its own, or has authenticated channels to trusted validation providers. Information systems that provide name and address resolution services for local clients include, for example, recursive resolving or caching domain name system (DNS) servers. DNS client resolvers either perform validation of DNSSEC signatures, or clients use authenticated channels to recursive resolvers that perform such validations. Information systems that use technologies other than the DNS to map between host/service names and network addresses provide other means to enable clients to verify the authenticity and integrity of response data.

CONTROL ENHANCEMENTS

SC-21 (1) SECURE NAME/ADDRESS RESOLUTION SERVICE (RECURSIVE OR CACHING RESOLVER) | DATA ORIGIN/INTEGRITY

[Withdrawn: Incorporated into SC-21]. (See above.)

REFERENCES:

NIST Special Publication 800-81