NIST SP 800-171 Rev 2 · 3.13 System & Communications Protection
3.13.7 Prevent split tunneling
Prevent remote devices from simultaneously establishing non-remote connections with organizational systems and communicating via some other connection to resources in external networks (i.e., split tunneling).
- 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
- 1
- From NIST SP 800-171A, each one a “determine if” an assessor answers.
What an assessor checks
NIST SP 800-171A breaks 3.13.7 into 1 objectives. Every one has to be met for the requirement to be met; a partial answer scores as not implemented.
- Determine if remote devices are prevented from simultaneously establishing non-remote connections with the system and communicating via some other connection to resources in external networks (i.e., split tunneling).
- Examine
- [SELECT FROM: System and communications protection policy; procedures addressing boundary protection; security plan; system design documentation; system hardware and software; system architecture; 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; personnel with boundary protection responsibilities].
- Test
- [SELECT FROM: Mechanisms implementing boundary protection capability; mechanisms supporting or restricting non-remote connections].
If it is open: POA&M eligibility
May be carried on a Level 2 POA&M · 1 point deducted
A 1-point requirement outside the six named exclusions - eligible to carry, and NOT MET until a closeout assessment confirms it.
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 3.13.7 maps
NIST SP 800-53 Rev 5
No direct mapping.
NIST CSF 2.0
No direct mapping.
SOC 2
No direct mapping.
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 3.13.7 get_assessment_objectives 3.13.7 generate_poam_entries ["3.13.7"]
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