NIST SP 800-171 Rev 2 · 3.13 System & Communications Protection

3.13.9 Terminate network connections

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

SPRS weight

1

1 point deducted from 110 when not implemented.

CMMC level

L2

Level 2 only; not among the 17 Level 1 practices.

Assessment objectives

3

From NIST SP 800-171A, each one a “determine if” an assessor answers.

What an assessor checks

NIST SP 800-171A breaks 3.13.9 into 3 objectives. Every one has to be met for the requirement to be met; a partial answer scores as not implemented.

1. [a]Determine if a period of inactivity to terminate network connections associated with communications sessions is defined.
2. [b]Determine if network connections associated with communications sessions are terminated at the end of the sessions.
3. [c]Determine if network connections associated with communications sessions are terminated after the defined period of inactivity.

Examine

[SELECT FROM: System and communications protection policy; procedures addressing network disconnect; system design documentation; security plan; system configuration settings and associated documentation; system audit logs and records; other relevant documents or records].

Interview

[SELECT FROM: System or network administrators; personnel with information security responsibilities; system developer].

Test

[SELECT FROM: Mechanisms supporting or implementing network disconnect capability].

If it is open: POA&M eligibility

A POA&M is only permitted at a score of 88 or above, and closes in one 180-day window. Check a full gap list or compute your score.

Where 3.13.9 maps

Query it from your own tools

This page and the MacTech CMMC MCP server render the same dataset. Ask your assistant and it will answer from the methodology, not from memory.

lookup_control 3.13.9
get_assessment_objectives 3.13.9
generate_poam_entries ["3.13.9"]

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