1.9 KiB
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sc-21 - [catalog] Secure Name/Address Resolution Service (Recursive or Caching Resolver)
Control Statement
Request and perform data origin authentication and data integrity verification on the name/address resolution responses the system receives from authoritative sources.
Control guidance
Each client of name resolution services either performs this validation on its own or has authenticated channels to trusted validation providers. Systems that provide name and address resolution services for local clients include 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. Systems that use technologies other than the DNS to map between host and service names and network addresses provide some other means to enable clients to verify the authenticity and integrity of response data.
Control assessment-objective
data origin authentication is requested for the name/address resolution responses that the system receives from authoritative sources; data origin authentication is performed on the name/address resolution responses that the system receives from authoritative sources; data integrity verification is requested for the name/address resolution responses that the system receives from authoritative sources; data integrity verification is performed on the name/address resolution responses that the system receives from authoritative sources.
What is the solution and how is it implemented?
Customer applications fully inherit this control from cloud.gov.