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Wireless or Wired client failing authentication in NAC through NTLM with error: Reading winbind reply Failed! (0xC0000001)

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Information

 
TitleWireless or Wired client failing authentication in NAC through NTLM with error: Reading winbind reply Failed! (0xC0000001)
Symptoms
User being rejected in NAC due to the following reason:
   The authentication request was rejected due to NTLM authentication error: Reading winbind reply Failed! (0xc0000001)
 
Environment
  • Extreme NAC/Control
  • IdentiFi Wireless
Cause
NAC is not properly joined to Active Directory
Resolution
  • Verify AAA configuration is setup to an active LDAP user account
  • Verify SMB1/NTLM1 support is enabled in the Active Directory (AD)
  • Verify the clock in the NAC Appliance and the clock in AD are syncronized
  • Restart NAC services by connected to NAC via SSH and issuing the following command:
nacctl restart
  • Right click on NAC appliance in NAC Manager and click NAC Appliance log to verify connectivity to AD was successful
Additional notes
Support for SMBv2 was added in 8.1.3/8.2.3

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