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Unable to read or write to a CIFS share even when expecting valid permissions

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Category:
ontap-9
Specialty:
NAS
Last Updated:

 

Applies to

  • ONTAP 9
  • CIFS

Issue

  • When a client attempts to read from a CIFS share, access is denied due insufficient permissions
  • Sufficient permissions are expected, and may even be observed for other clients running similar workloads/applications
  • A security trace show that the impacted Windows client tries to access the share with a NULL user and not with valid credentials:

Node            Index Filter Details             Reason
--------------- ----- -------------------------- ------------------------------
Cluster01       1     Security Style: NTFS and   Access is denied. The
                      NT ACL                     requested permissions are not
                                                 granted by the ACE while
                                                 opening existing file or
                                                 directory. Access is not
                                                 granted for: "Read Control",
                                                 "Read Attributes", "Append",
                                                 "Write", "Read"
                      Protocol: cifs
                      Volume: -
                      Share: testShare 
                      Path: /CIFS01/testShare 
                      Win-User: /
                      Session-ID: 1744584552708272

 

 

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