Enabling or disabling AES encryption results in failure with Kerberos Error: KDC has no support for encryption type
Applies to
- ONTAP 9
- CIFS
- Key Distribution Center (KDC)
- Active Directory (AD)
Issue
- When trying to enable/disable AES the command fails :
::> 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:
[kern_secd:info:xxx] | [xxx] info : [krb5 context xxx] Received error from KDC: -xxx/KDC has no support for encryption type<★★
[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 }
[kern_secd:info:xxx] | [xxx] ERR : RESULT_ERROR_KERBEROS_ETYPE_NOSUPP:7515 in getKerberosServerCredentials() at src/utils/secd_krb_utils.cpp:451
[kern_secd:info:xxx] | [xxx] ERR : RESULT_ERROR_KERBEROS_ETYPE_NOSUPP:7515 in changeMachineAccountPassword() at src/utils/secd_krb_utils.cpp:720
[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
[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 }
[kern_secd:info:xxx] | [xxx] ERR : RESULT_ERROR_CIFS_SMB_KERBEROS_ERROR:1056 in getFailureCode() at src/utils/secd_thread_task_journal.cpp:348