3rd party firewall on Active Directory is blocking ports 389 and 445
Applies to
- ONTAP 9
- SMB/CIFS
Issue
- When attempting to reach out to Active Directory (AD), AD closes the connection when attempting to connect to ports 389 or 445.
- This can be seen via TCPDUMP:
- We also can see this in secd/ems logs:
[Cluster01-01: secd: secd.cifsAuth.problem:error]: vserver (SVM1) General CIFS authentication problem. Error: User authentication procedure failed CIFS SMB2 Share mapping - Client Ip = 10.1.1.2
[ 0 ms] Login attempt by domain user 'NetApp\bob' using NTLMv2 style security
[ 0] Using a cached connection to DC1.NetApp.com
[ 26] Authentication failed with DC DC1. Not retriable. (Status: 0xc0000064)
[ 27] Unable to find the NetBIOS domain name for Active Directory '.' **
[ 27] FAILURE: CIFS authentication failed
[ 2125] TCP connection to ip 10.10.10.10, port 389 via interface 10.10.10.2 failed: Operation timed out.
[ 4159] Unable to connect to LDAP (Active Directory) service on DC2.NetApp.com (Error: Can't contact LDAP server
OR
[ 8007] TCP connection to ip 172.24.100.5, port 445 via interface 10.101.7.41 failed: Operation timed out.
[ 8007] Could not open a socket to 'dc002cd.netapp.cn'
[ 8007] Unable to connect to NetLogon service on dc002cd.netapp.cn (Error: RESULT_ERROR_SPINCLIENT_UNABLE_TO_RESOLVE_SERVER)
**[ 8007] FAILURE: Unable to make a connection (NetLogon:netapp.CN), result: 6942
[ 8007] CIFS authentication failed
[ 8007] Retry requested, but the retry window (7000 ms) has expired; giving up.