EAP-TLS Handshake Debugger

Problem Context

Enterprise IT admins manage wireless networks using NPS for 802.1X authentication. Macs with Jamf-provisioned machine certificates fail silently during EAP-TLS handshakes, while Windows machines work fine. The NPS logs show no errors, making troubleshooting nearly impossible. Admins waste hours manually checking certs, NPS policies, and SSID configs across Meraki and Cisco networks.

Pain Points

NPS silently rejects Mac EAP-TLS handshakes with no log entries (SSL alert 49), forcing admins to guess why. Manual fixes like NT Principal Name SANs or KB5014754 patches often fail. Jamf certs prompt users to select manually when they shouldn’t. Meraki SSIDs work differently than Cisco Z3s, adding complexity. Admins lack a unified view of NPS, Jamf, and SSID configs to spot mismatches.

Impact

Downtime costs thousands per hour in lost productivity. Consultants charge $200+/hour to debug silent rejections. Failed logins frustrate users and IT teams. Policy drifts between NPS and Jamf go unnoticed until outages occur. Admins waste 10+ hours/week on manual troubleshooting instead of strategic work.

Urgency

Silent rejections can lock out entire Mac fleets mid-day, halting remote work. No logs mean admins can’t prove the issue to vendors or management. Temporary fixes (like manual cert selection) create security risks. Meraki/Cisco SSID differences make scaling authentication policies impossible without deep debugging.

Target Audience

Enterprise IT admins managing Jamf, NPS, and Meraki/Cisco wireless networks. MSPs supporting SMBs with Mac-heavy environments. Security teams enforcing 802.1X for BYOD policies. Network engineers troubleshooting EAP-TLS handshake failures. Jamf/Cisco/Meraki admins who need cross-vendor visibility.

Solution Approach

A cloud-based tool that pulls logs from NPS, Jamf, and SSID controllers to reconstruct EAP-TLS handshakes in real-time. It decodes silent rejections (like SSL alert 49) by correlating NPS policy checks, Jamf cert validation, and SSID config differences. Admins get a unified dashboard showing exactly where the handshake fails—no more guessing or manual log checks.

Key Features

1. Cert Policy Comparator: Checks Jamf SCEP certs against NPS policies to spot mismatches (e.g., missing NT Principal Name SANs).
2. SSID Config Drift Detector: Alerts when Meraki/Cisco SSID policies diverge from NPS or Jamf settings.
3. Automated Remediation: Suggests fixes (e.g., ‘Add NT Principal Name SAN to Jamf SCEP template’) based on historical failure patterns.

User Experience

Admins connect their NPS, Jamf, and SSID controller APIs once. The tool pulls logs automatically and builds a real-time view of EAP-TLS handshakes. When a Mac fails to connect, the admin sees a step-by-step breakdown of where the rejection happened (e.g., ‘NPS denied cert due to missing SAN’). Alerts notify them before outages occur. Remediation scripts can auto-fix common issues like cert template errors.

Differentiation

No other tool correlates NPS, Jamf, and SSID logs to diagnose silent EAP-TLS rejections. Native tools (like NPS Event Viewer) miss SSL alert 49 errors. Jamf’s logs don’t show NPS policy failures. This tool is the only one that decodes the full handshake flow and suggests fixes—no more trial and error. It works across Meraki, Cisco, and other SSID vendors, unlike vendor-specific debuggers.

Scalability

Starts with 1 NPS server ($99/mo) and scales to enterprise environments with 10+ servers. Add-ons like automated remediation or AD CS integration unlock higher tiers. MSPs can white-label the tool for clients. API access allows custom integrations with ticketing systems (e.g., ServiceNow) for IT teams.

Expected Impact

Eliminates silent EAP-TLS rejections, reducing Mac login failures by 90%. Saves 10+ hours/week on manual troubleshooting. Catches policy drifts before they cause outages. Lowers consultant costs by providing actionable diagnostics. Improves security by ensuring certs and policies align across Jamf, NPS, and SSID controllers.