What this requirement asks
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).
This is a CMMC Level 2 requirement in the System & Communications Protection family, drawn from NIST SP 800-171 Rev. 2. An assessor evaluates it objective by objective — every objective below must be supported by evidence, not just described in a policy.
Assessment objectives (1)
- 3.13.7[a] — 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)
What an assessor examines
Examine:
- System and communications protection policy
- procedures addressing boundary protection
- system 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:
- System or network administrators
- personnel with information security responsibilities
- system developer
- personnel with boundary protection responsibilities
Test:
- Mechanisms implementing boundary protection capability
- mechanisms supporting or restricting non-remote connections
Evidence that defends it
Show split-tunnel off
Check your readiness
Score this requirement against your own environment with the Level 2 self-assessment checklist, or estimate your SPRS score with the free CMMC compliance tool. Self-reported answers are planning signals only — they do not establish a verified or assessor-accepted result.