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ONTAP Requirements for CIFS Kerberos

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • Microsoft Windows
  • CIFS/SMB
  • Kerberos

Answer

  1. Follow the map the SMB server on the DNS server procedure.
  2. Confirm the hostname, alias, Fully Qualified Domain Name (FQDN), or IP address used in the servername section of the UNC to the access the SMB share has a registered SPN using the setspn -l windows command with the SVM SMB Server Name.  If a matching entry to the servname used is not returned, follow How to set an SPN.

C:\>setspn -l svm1
Registered ServicePrincipalNames for CN=SVM1,CN=Computers,DC=domain,DC=local:
        HOST/svm1.domain.local
        HOST/SVM1

  1. The time difference between ONTAP and the Active Directory domain controller is not greater than the default of 5 minutes for both ONTAP and Active Directory.
  2. If RC4 support for Kerberos has been disabled on all domain controllers then enable AES encryption for Kerberos-based communication for the CIFS SVM.

Additional Information

 

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