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SC.L2-3.13.9Connections Termination

>Control Description

Terminate network connections associated with communications sessions at the end of the sessions or after a defined period of inactivity.

>Cross-Framework Mappings

NIST SP 800-171

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • What is your policy for session termination?
  • How do you determine appropriate session timeout values?
  • What is your process for implementing session termination controls?
  • How do you balance security with user productivity for session timeouts?

Technical Implementation:

  • What mechanisms terminate idle network sessions?
  • What timeout values are configured for session termination?
  • What application and network layer controls enforce session termination?
  • What logging captures session termination events?
  • What technologies detect and terminate inactive sessions?

Evidence & Documentation:

  • What network diagrams show boundary protection architecture?
  • What firewall rule sets and configurations can you provide?
  • What encryption implementation documentation shows FIPS-validated crypto?
  • What key management procedures can you provide?
  • What network segmentation documentation shows proper separation?
  • What evidence shows cryptographic mechanisms protect CUI?
  • What configuration documentation shows security controls are properly implemented?

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