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EAP-PEAP or EAP-TLS authentication not working

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Information

 
TitleEAP-PEAP or EAP-TLS authentication not working
Symptoms
  • ERROR: TLS Alert write:fatal:unknown CA
  • EAP Authentication failing
  • Internally or canned RADIUS certificate installed
Environment
  • EAC
  • NAC
Cause
The root CA that signed the RADIUS certificate installed on the NAC is not trusted by the client
Resolution
  1. Disable certificate validation on the client
  2. Install RADIUS Certificate signed by a commercial authority 
  3. Install root CA certificate that signed the RADIUS certificate on the client
Additional notes

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