Mapped to NIST 800-171 Requirement: 3.1.9
CMMC Assessment Objective: AC.L2-3.1.9[b]
What This Objective Means
This is the technical enforcement check of your system use notification policy. The assessor is looking for confirmation that your system:
• Displays a login banner or message before a user can authenticate
• Uses system-level configuration to do so
• Applies this behavior consistently across all systems where CUI may be accessed
It’s not enough to have a policy that requires system use notifications—you must prove they are implemented correctly.
Why It Matters
Without a pre-login warning:
• Users are not clearly informed of acceptable use or monitoring practices
• The organization may lack legal authority to monitor activities
• Systems fall out of compliance with CMMC and federal contract requirements
Login banners must appear before any access is granted.
How to Implement It
• Use system configuration tools to enforce pre-access banners:
◦ Windows: Group Policy > Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options > “Interactive logon: Message text/title”
◦ Linux: Configure /etc/issue or SSH banner settings
◦ Web/VPN portals: Pre-login HTML or authentication intercept pages
• Verify that the banner is displayed before login credentials are accepted
• Test behavior regularly across all systems and user entry points
Evidence the Assessor Will Look For
• Screenshots showing login banners from system login screens
• Group Policy settings, SSH banner configs, or application settings enforcing banners
• Testing results that confirm banner appears before login
• Documentation listing systems with verified banner enforcement
Common Gaps
• Banners configured to appear after login (non-compliant)
• Some systems show banners, others don’t
• Missing or incorrect configuration in cloud, VPN, or remote tools
How Cuick Trac Helps
Cuick Trac supports this control by:
• Displaying a consistent system use notification across all secure enclave access points
• Blocking access to the environment until the banner is acknowledged
• Helping organizations replicate the same behavior across their internal or hybrid infrastructure
• Offering pre-approved banner language and configuration support
With Cuick Trac, there’s no ambiguity—every system clearly states the rules before users enter.
Final CTA
If the warning comes after login, it’s already too late.
Schedule a Cuick Trac demo and confirm your login banners are working the way compliance requires.