Authorize wireless access prior to allowing such connections
📖 What This Means
This control requires organizations to formally approve and document any wireless devices or users before they can connect to the network. Think of it like a bouncer checking IDs before allowing entry to a club. You need a clear process to verify who or what is connecting wirelessly and ensure they meet security requirements. For example, a contractor's laptop should only be granted wireless access after IT confirms it has up-to-date antivirus software. Another example: a warehouse barcode scanner must be approved by both the operations manager and security team before it can join the WiFi network. The goal is to prevent unauthorized devices from potentially accessing sensitive data or spreading malware.
🎯 Why It Matters
Uncontrolled wireless access is one of the most common attack vectors - 43% of companies have experienced a WiFi-related security incident (Source: PurpleSec). A rogue device could steal CUI, inject ransomware, or create a backdoor into your network. In 2021, a defense contractor had their F-35 fighter jet data compromised when an engineer's unauthorized personal tablet (connected to WiFi) was infected with malware. The DoD specifically calls out wireless security in CMMC because battlefield systems and contractor networks often use wireless tech. A single unauthorized connection could cost $250k+ in breach response and lead to contract disqualification.
✅ How to Implement
- 1. In AWS/Azure/GCP, enable 'Require Authorization' in wireless access point services like AWS Direct Connect or Azure ExpressRoute
- 2. Create IAM policies that explicitly deny wireless device connections unless tagged with 'Approved-Wireless'
- 3. Set up CloudWatch/Azure Monitor alerts for any unauthorized wireless connection attempts
- 4. Integrate your wireless auth with existing MDM solutions (e.g., Intune, Jamf) to validate device health checks
- 5. Document the approval workflow in your cloud security policy (e.g., 'All wireless devices require VP of IT approval ticket #')
- 6. Configure conditional access policies in Entra ID (Azure AD) to block unapproved devices
📋 Evidence Examples
Wireless Access Authorization Policy
Approved Wireless Device Register
Wireless Auth Logs
Access Point Configuration Screenshot
Approval Tickets
📝 SSP Guidance
Use this guidance when writing the System Security Plan (SSP) narrative for this control.
How to Write the SSP Narrative
For AC.L2-3.1.16 ("Authorize wireless access prior to allowing such connections"), your SSP narrative should specifically describe: (1) the tools and technologies you use to implement this control, (2) the configuration or process that enforces it, (3) who is responsible for maintaining it, and (4) what evidence proves it's working. Describe how access to CUI systems is controlled, including the specific IAM tools, policies, and processes used. Reference your Access Control Policy and identify the systems in scope. Be specific -- name your actual products, settings, and responsible personnel.
Example SSP Narratives
"AC.L2-3.1.16 is implemented using cloud-native controls. [Organization] uses [specific cloud service/feature] to authorize wireless access prior to allowing such connections. The configuration is managed through [Azure Policy/AWS Config/Terraform] and monitored via [SIEM tool]. Responsible party: [IT Security Manager]. Evidence: [specific artifact, e.g., 'Azure AD Conditional Access policy screenshot, CloudTrail logs']."
"AC.L2-3.1.16 is implemented through on-premise infrastructure controls. [Organization] uses [Active Directory/Group Policy/specific tool] to authorize wireless access prior to allowing such connections. Configuration is documented in [location] and audited [frequency]. Responsible party: [System Administrator]. Evidence: [specific artifact, e.g., 'Group Policy export, Windows Event logs']."
"AC.L2-3.1.16 is implemented across both cloud and on-premise environments. [Organization] uses [Azure AD Connect/hybrid tool] to ensure consistent enforcement. Cloud resources are managed via [cloud tool] and on-premise systems via [on-prem tool]. Both environments report to [centralized SIEM]. Responsible party: [IT Director]. Evidence: [artifacts from both environments]."
System Boundary Considerations
- • Identify all access points to CUI systems (VPN, direct network, cloud portals)
- • Document which IAM system manages access (Azure AD, AWS IAM, on-prem AD)
- • Map user roles to system access levels
- • Ensure this control covers all systems within your defined CUI boundary where authorize wireless access prior to allowing such connections applies
- • Document any systems where this control is not applicable and explain why
Key Documentation to Reference in SSP
- 📄 Access Control Policy
- 📄 IAM configuration documentation
- 📄 Access request and approval records
- 📄 Evidence artifacts specific to AC.L2-3.1.16
- 📄 POA&M entry if control is not fully implemented
What the Assessor Looks For
The assessor will verify that access controls are implemented as described, test whether unauthorized users are blocked, and review access logs for evidence of enforcement.
💬 Self-Assessment Questions
Use these questions to assess your compliance. Each "NO" answer provides specific remediation guidance.
Question 1: Do you have a documented process for authorizing wireless devices?
Question 2: Are all wireless access points configured to require authentication before granting network access?
Question 3: Can you produce a current list of all authorized wireless devices?
Question 4: Are unauthorized wireless connection attempts logged and alerted?
Question 5: Is wireless authorization reviewed at least annually?
⚠️ Common Mistakes (What Auditors Flag)
1. Using shared WiFi passwords instead of individual auth
2. Missing visitor wireless controls
3. No documentation of approvals
4. IoT devices bypassing auth
5. Not testing auth controls
📚 Parent Policy
This practice is governed by the Access Control Policy