| name | Boundary Protection (03.13.01)_boundary-protection |
| description | Monitor and control communications at external managed interfaces to the system and key internal managed interfaces within the system. |
| category | configuration |
| version | 3.0 |
| author | cyberstrike-official |
| tags | ["nist","sp800-171","rev3","boundary protection (03-13-01)","family-03.13","cui-protection","cmmc"] |
| tech_stack | ["aws","azure","gcp","linux","windows","network"] |
| cwe_ids | ["CWE-311"] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Boundary Protection (03.13.01) Boundary Protection
High-Level Description
Family: System and Communications Protection
Framework: NIST SP 800-171 Rev 3
Applicability: Systems processing, storing, or transmitting CUI
Monitor and control communications at external managed interfaces to the system and key internal managed interfaces within the system.
Implement subnetworks for publicly accessible system components that are physically or logically separated from internal networks.
Connect to external systems only through managed interfaces that consist of boundary protection devices arranged in accordance with an organizational security architecture.
What to Check
How to Test
Step 1: Review System Security Plan
Examine the SSP for Boundary Protection (03.13.01) implementation description and responsible parties.
Step 2: Assess Implementation
# Verify security controls protecting CUI
# Check access controls, encryption, monitoring as applicable
# For Linux systems:
ls -la /etc/security/ 2>/dev/null
grep -r "CUI\|controlled" /etc/security/ 2>/dev/null
# For cloud:
# Use cloud-audit-mcp tools to assess posture
Step 3: CMMC Assessment Validation
Verify this requirement passes CMMC Level 2 assessment methodology per SP 800-171A Rev 3.
Tools
| Tool | Purpose | Usage |
|---|
| cloud-audit-mcp | Assess cloud CUI environment | cloud_audit_* tools |
| Manual Review | SSP and POA&M review | Documentation analysis |
Remediation Guide
Requirement Statement
Monitor and control communications at external managed interfaces to the system and key internal managed interfaces within the system.
Implement subnetworks for publicly accessible system components that are physically or logically separated from internal networks.
Connect to external systems only through managed interfaces that consist of boundary protection devices arranged in accordance with an organizational security architecture.
