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Client authentication fails with secd.kerberos.tktnyv in EMS

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Category:
ontap-9
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nas
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Applies to

  • Ontap 9
  • CIFS/SMB
  • Kerberos

Issue

  • All client authentication with Kerberos fails
  • Errors observed :

[node-01: secd: secd.conn.auth.failure:debug]: Vserver (svm1) could not authenticate over the network to server (dcname). Error: Invalid credentials (Service: LDAP (Active Directory), Operation: SiteDiscovery).
[node-01: secd: secd.kerberos.tktnyv:debug]: Kerberos client ticket not yet valid for vserver (svm1).

Nblade.CifsOperationTimedOut:Detected a timed out CIFS operation.SMB command for this operation: SMB2_COM_SESSION_SETUP,Number of times this command was suspended: 136,Number of times this command was restarted: 0,Last CSM error during this operation: CSM_OK,Remote blade UUID: <UUID>,Is QoS enabled: QoS_disabled,Last SpinNp error during this operation: SPINNP_NO_FO_ERROR,Client IP address: <CLIENT_IP>,Local IP address: <LOCAL_IP>,Target Vserver ID: <VSERVER_ID>,

CIFS SMB2 Share mapping
- Client Ip = <CLIENT_IP>
- Login attempt by domain user '<DOMAIN>\<USER_ACCOUNT>' using NTLMv2 style security- Successfully connected to ip <DC_IP>, port 445 using TCP- Encountered NT error (NT_STATUS_MORE_PROCESSING_REQUIRED) for SMB command SessionSetup- Cluster and Domain Controller times differ by more than the configured clock skew (KRB5KRB_AP_ERR_SKEW)- Kerberos authentication failed with result: 7537- Unable to connect to NetLogon service on <DC_HOSTNAME> (Error: RESULT_ERROR_SECD_NO_CONNECTIONS_AVAILABLE)- No servers available for MS_NETLOGON, vserver: <VSERVER_ID>, domain: <DOMAIN_FQDN>- FAILURE: Unable to make a connection (NetLogon:<DOMAIN_FQDN>), result: 6940
- CIFS authentication failed

 

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