CCI-002409

Block inbound and outbound communications traffic between organization-defined communication clients that are independently configured by end users and external service providers.

Implementation Guidance

Determine if: - inbound communications traffic is blocked between [SC-07(19)_ODP; communication clients that are independently configured by end users and external service providers are defined] that are independently configured by end users and external service providers. - outbound communications traffic is blocked between [SC-07(19)_ODP; communication clients that are independently configured by end users and external service providers are defined] that are independently configured by end users and external service providers.

Validation Procedures

Examine: [SELECT FROM: System and communications protection policy; procedures addressing boundary protection; system design documentation; system hardware and software; system architecture; system configuration settings and associated documentation; list of communication clients independently configured by end users and external service providers; system audit records; system security plan; other relevant documents or records]. Interview: [SELECT FROM: System/network administrators; organizational personnel with information security responsibilities; organizational personnel with boundary protection responsibilities]. Test: [SELECT FROM: Mechanisms supporting and/or implementing the blocking of inbound and outbound communications traffic between communication clients independently configured by end users and external service providers].

The controls below (if any) were marked by NIST as being related to CCI-002409.