+SC-21 [L] Secure Name/Address Resolution Service (Recursive or Caching Resolver)

SC-21 [L] Secure Name/Address Resolution Service (Recursive or Caching Resolver)

Control

Request and perform data origin authentication and data integrity verification on the name/address resolution responses the system receives from authoritative sources.

Discussion

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.

Assessment Objective

  1. data origin authentication is requested for the name/address resolution responses that the system receives from authoritative sources;
  2. data origin authentication is performed on the name/address resolution responses that the system receives from authoritative sources;
  3. data integrity verification is requested for the name/address resolution responses that the system receives from authoritative sources;
  4. data integrity verification is performed on the name/address resolution responses that the system receives from authoritative sources.

Assessment Method

Examine

System and communications protection policy procedures addressing secure name/address resolution services (recursive or caching resolver) system design documentation system configuration settings and associated documentation system audit records system security plan other relevant documents or records

Interview

System/network administrators organizational personnel with information security responsibilities organizational personnel with responsibilities for managing DNS

1. Přehled

1.1 Odkazy

1.2 Identifikované požadavky

1.3 Související regulace

2. Identifikované požadavky

Požadavky

3. Související regulace

Regulace

Propojené úkoly

Vazby
is blocked by SC-21 [L] Secure Name/Address Resolution Service (Recursive or Caching Resolver) – Assessment Procedure
is blocked by Secure Name / Address Resolution Service (Recursive or Caching Resolver)