NAC Troubleshooting
RCCE students will learn network access control architectures including 802.1X authentication, RADIUS/TACACS+ integration, device posture assessment, guest networking, and network segmentation enforcement. RCCE students will learn to design and deploy NAC solutions that enforce access policies based on user identity, device health, and location, configure pre-admission and post-admission controls, implement remediation workflows for non-compliant devices, troubleshoot NAC authentication failures, detect and respond to NAC bypass attempts, integrate NAC with endpoint management platforms, and maintain NAC policies as organizational requirements evolve. This diagnostic course focuses on identifying, analyzing, and resolving common failures, misconfigurations, and operational issues. Building on core knowledge, RCCE students will learn systematic troubleshooting methodologies that accelerate root-cause analysis and minimize downtime. Students work through realistic break-fix scenarios that build the diagnostic confidence needed for high-pressure production environments.
- Security Engineers building defensive controls
- Security Analysts and Blue Team members
- Systems Administrators with security responsibilities
- GRC and Risk Professionals supporting controls
- Professionals implementing NAC Troubleshooting
- Execute hands-on tasks for advanced cyber defense mastery
- Execute hands-on tasks for network security
- Explain Executive Overview fundamentals
- Execute hands-on tasks for course diagnostic focus — covering NAC failures expose entire network segments, Identify: recognize failure symptoms fast.
- Explain NAC Architecture Overview fundamentals
- Execute hands-on tasks for auth server
- Execute hands-on tasks for policy engine
- Execute hands-on tasks for endpoint / client
- Execute hands-on tasks for 802.1x authentication flow
- Execute hands-on tasks for common failure points — covering Supplicant misconfiguration (wrong EAP type).
- Execute hands-on tasks for primary use
- Execute hands-on tasks for radius diagnostic checklist — covering Verify shared secret match on NAS and RADIUS server.
| Module 01 | Advanced Cyber Defense Mastery |
| Module 02 | Network Security |
| Module 03 | Executive Overview |
| Module 04 | Course Diagnostic Focus |
| Module 05 | NAC Architecture Overview |
| Module 06 | Auth Server |
| Module 07 | Policy Engine |
| Module 08 | Endpoint / Client |
| Module 09 | 802.1X Authentication Flow |
| Module 10 | Common Failure Points |
| Module 11 | Primary Use |
| Module 12 | RADIUS Diagnostic Checklist |
| Module 13 | Device Posture Assessment |
| Module 14 | Firewall State |
All hands-on labs run on Rocheston Rose X OS. Students practice nac troubleshooting by implementing the controls discussed in class, with a focus on real-world deployment, monitoring, and validation.
- Lab 1: Execute hands-on tasks for advanced cyber defense mastery
- Lab 2: Execute hands-on tasks for network security
- Lab 3: Explain Executive Overview fundamentals
- Lab 4: Execute hands-on tasks for course diagnostic focus
- Lab 5: Explain NAC Architecture Overview fundamentals
Upon successful completion of this course, students will receive an official RCCE Course Completion Certificate for NAC Troubleshooting, verifiable through the Rocheston certification portal.
- Full access to all course materials and slide decks
- Hands-on lab access on Rocheston Rose X OS environment
- Access to Rocheston CyberNotes
- Access to Rocheston Zelfire — EDR/XDR SIEM platform
- Access to Rocheston Raven — online cyber range exercise platform
- Access to Rocheston Vulnerability Vines AI