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KDC event ID 16 is logged if AES for Kerberos is disabled

  1. Last updated
    Apr 3, 2025
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5,400
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Votes:
6
Category:
ontap-9
Specialty:
nas
Last Updated:
4/3/2025, 6:15:13 AM

Applies to

  • ONTAP 9
  • CIFS
  • Windows Key Distribution Center (KDC)

Issue

  • Event ID 16 (KDCEVENT_NO_KEY_INTERSECTION_TGS) from source Microsoft-Windows-Kerberos-Key-Distribution-Center is logged on one or more KDCs due to missing Kerberos support for AES encryption types "aes128-cts-hmac-sha1-96" (17) and "aes256-cts-hmac-sha1-96" (18):
example
While processing a TGS request for the target server cifs/netappcifs, the account user@DOMAIN.COM did not have a suitable key for generating a Kerberos ticket (the missing key has an ID of 8). The requested etypes were 18  17. The accounts available etypes were 23  -133  -128  18  17. Changing or resetting the password of NETAPPCIFS will generate a proper key.
 
  • Use  vserver cifs security show to determine current configuration:
cluster::> vserver cifs security show -vserver netappcifs -fields is-aes-encryption-enabled
vserver    is-aes-encryption-enabled
---------- -------------------------
netappcifs false

 

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