LoginException: Unsupported negotiation mechanism NTLM with SPNEGO authentication on JBoss EAP

Solution Verified - Updated -

Issue

  • Authentication fails
  • JBoss EAP log shows 'LoginException: Unsupported negotiation mechanism NTLM' when using SPNEGO for authentication
  • The browser prompts for username and password, then uses the provided credentials with NTLM instead of SPNEGO.

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP)
    • 5.1
    • 5.2.0
    • 6
    • 7
  • JBoss Negotiation
  • Kerberos/SPNEGO authentication

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