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💼 SC-20 Secure Name/Address Resolution Service (Authoritative Source) (L)(M)(H)

  • Contextual name: 💼 SC-20 Secure Name/Address Resolution Service (Authoritative Source) (L)(M)(H)
  • ID: /frameworks/fedramp-high-security-controls/sc/20
  • Located in: 💼 System and Communications Protection

Description​

a. Provide additional data origin authentication and integrity verification artifacts along with the authoritative name resolution data the system returns in response to external name/address resolution queries; and

b. Provide the means to indicate the security status of child zones and (if the child supports secure resolution services) to enable verification of a chain of trust among parent and child domains, when operating as part of a distributed, hierarchical namespace.

SC-20 Additional FedRAMP Requirements and Guidance:

Guidance: SC-20 applies to use of external authoritative DNS to access a CSO from outside the boundary.

Guidance: External authoritative DNS servers may be located outside an authorized environment. Positioning these servers inside an authorized boundary is encouraged.

Guidance: CSPs are recommended to self-check DNSSEC configuration through one of many available analyzers such as Sandia National Labs

Requirement: Control Description should include how DNSSEC is implemented on authoritative DNS servers to supply valid responses to external DNSSEC requests.

Similar​

  • Sections
    • /frameworks/nist-sp-800-53-r5/sc/20
  • Internal
    • ID: dec-c-84e23f8f

Similar Sections (Take Policies From)​

SectionSub SectionsInternal RulesPoliciesFlags
💼 NIST SP 800-53 Revision 5 → 💼 SC-20 Secure Name/address Resolution Service (authoritative Source)2

Similar Sections (Give Policies To)​

SectionSub SectionsInternal RulesPoliciesFlags
💼 FedRAMP Low Security Controls → 💼 SC-20 Secure Name/Address Resolution Service (Authoritative Source) (L)(M)(H)
💼 FedRAMP Moderate Security Controls → 💼 SC-20 Secure Name/Address Resolution Service (Authoritative Source) (L)(M)(H)

Sub Sections​

SectionSub SectionsInternal RulesPoliciesFlags