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CIFS Kerberos outage after set msDS-SupportedEncryptionTypes to 30

  1. Last updated
    Apr 21, 2025
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61
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Category:
ontap-9
Specialty:
nas
Last Updated:
4/21/2025, 8:10:36 PM

Applies to

  • ONTAP 9
  • CIFS/SMB
  • Kerberos
  • Active Directory

Issue

  • Used Active Directory Attribute Editor to change CIFS server's machine account's attribute msDS-SupportedEncryptionTypes to value 30
  • Afterwards, CIFS clients that navigate to \\hostname cannot access data because Kerberos authentication fails
  • CIFS clients that navigate to \\1.2.3.4 can access data because NTLM authentication succeeds

 

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