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CIFS authentication fails due to NetLogon and DNS timeouts on ONTAP

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9
  • SMB/CIFS with Active Directory (AD)

Issue

  • CIFS/SMB authentication intermittently fails on an ONTAP SVM.
  • AutoSupport shows secd errors indicating TCP timeouts to AD/DCs on port 445, NetLogon servers not reachable, and DNS queries timing out as following:

[node_01: secd: secd.conn.auth.failure:notice]: Vserver (SVM1) could not make a connection over the network to server (ip 192.168.0.5, port 445). Error: Operation timed out ().
[node_01: secd: secd.conn.auth.failure:notice]: Vserver (SVM1) could not make a connection over the network to server (ip 192.168.0.1, port 445). Error: Operation timed out ().
[node_01: secd: secd.netlogon.noServers:EMERGENCY]: None of the Netlogon servers configured for Vserver (SVM1) are currently accessible via the network.
[node_01: secd: secd.cifsAuth.problem:error]: vserver (SVM1) General CIFS authentication problem. Error: User authentication procedure failed CIFS SMB2 Share mapping - Client Ip = 192.168.0.2   [  0 ms] Login attempt by domain user abc\admin' using NTLMv2 style security   [  2005] TCP connection to ip 192.168.0.5, port 445 failed: Operation timed out.   [  2081] Unable to connect to NetLogon service on ctc005s.ad.co.jp (Error: RESULT_ERROR_SPINCLIENT_UNABLE_TO_RESOLVE_SERVER)   [  4084] TCP connection to ip 192.168.0.1, port 445 failed: Operation timed out.   [  4087] Unable to connect to NetLogon service on ad.com.cn (Error: RESULT_ERROR_SPINCLIENT_UNABLE_TO_RESOLVE_SERVER)   [  4094] No servers available for MS_NETLOGON, vserver: 7, domain: ad.co.jp. **[  4099] FAILURE: Unable to make a connection (NetLogon:AD.CO.JP), Result: RESULT_ERROR_SECD_NO_SERVER_AVAILABLE   [  4110] CIFS authentication failed
[node_01: secd: secd.dns.server.timed.out:error]: DNS server 192.168.0.5 did not respond to vserver = SVM1 within timeout interval.
[node_01: secd: secd.dns.srv.lookup.failed:error]: DNS server failed to look up service (xxx.xxx.xxx) for vserver (SVM1) with error (Operation timed out).
[node_01: secd: secd.cifsAuth.problem:error]: vserver (SVM1) General CIFS authentication problem. Error: User authentication procedure failed CIFS SMB2 Share mapping - Client Ip = 192.168.0.2   [  0 ms] Login attempt by domain user abc\admin' using NTLMv2 style security   [     0] No servers available for MS_NETLOGON, vserver: 7, domain: ad.co.jp.   [    53] Hostname found in Name Service Cache   [  5056] Failed to connect to 192.168.0.5 for DNS via Source Address 192.169.0.3: Operation timed out   [  7059] Failed to connect to 192.168.0.1 for DNS via Source Address 192.169.0.3: Operation timed out **[  7070] FAILURE: Unable to contact DNS to discover domain controllers.   [  7070] Unable to make a connection (NetLogon:AD.CO.JP), Result: RESULT_ERROR_DNS_CANT_REACH_SERVER   [  7071] CIFS authentication failed   [  7071] Retry requested, but the retry window (7000 ms) has expired; giving up.

  • The latency of Ping  is more than 1000ms which is very high.

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