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Attempting to disable AES encryption results in failure with Kerberos Error: KDC has no support for encryption type

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73
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • CIFS

Issue

  • When trying to disable AES:

::> vserver cifs security modify -vserver vs1 -is-aes-encryption-enabled false
Info: In order to disable CIFS AES encryption, the password for the CIFS server machine account must be reset. Enter the
username and password for the CIFS domain "NASLAB.LOCAL".
Enter your user ID: administrator
Enter your password:
Error: command failed: Password update failed. Reason: Kerberos Error: KDC has no support for encryption type.

 

  • SECD log:

Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  info :  [krb5 context xxx] Received error from KDC: -xxx/KDC has no support for encryption type<★★
Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  ERR  :  CIFS server could not authenticate as 'xxx@xxx': KDC has no support for encryption type (KRB5KDC_ERR_ETYPE_NOSUPP) { in getKerberosServerCredentials() at src/utils/secd_krb_utils.cpp:435 }
Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  ERR  :  RESULT_ERROR_KERBEROS_ETYPE_NOSUPP:7515 in getKerberosServerCredentials() at src/utils/secd_krb_utils.cpp:451
Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  ERR  :  RESULT_ERROR_KERBEROS_ETYPE_NOSUPP:7515 in changeMachineAccountPassword() at src/utils/secd_krb_utils.cpp:720
Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  ERR  :  RESULT_ERROR_KERBEROS_ETYPE_NOSUPP:7515 in secd_rpc_ad_change_password_1_svc_secd() at src/domain_services/secd_domain_services.cpp:1779
Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  debug:  SecD RPC Server sending reply to RPC 5: secd_rpc_ad_change_password  { in secdSendRpcResponse() at src/server/secd_rpc_server.cpp:2262 }
Fri Apr 12 2024 16:41:02 +09:00 [kern_secd:info:xxx] | [xxx]  ERR  :  RESULT_ERROR_CIFS_SMB_KERBEROS_ERROR:1056 in getFailureCode() at src/utils/secd_thread_task_journal.cpp:348

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