Skip to main content
NetApp Knowledge Base

CIFS access denied errors in ONTAP 9 after enabling  SMB encryption

  1. Last updated
    Feb 21, 2025
  2. Save as PDF
Views:
2,917
Visibility:
Public
Votes:
2
Category:
ontap-9
Specialty:
nas
Last Updated:
2/21/2025, 5:23:59 AM

Applies to

  • CIFS/SMB
  • ONTAP 9
  • Linux/Unix
  • Windows

Issue

  • After enabling -is-smb-encryption-required CIFS security option, some clients are no longer able to access CIFS shares and seeing access denied errors
  • The issue impacts clients running Windows versions earlier than 8, Server 2012, RHEL version below 7.5, while newer clients are still able to access shares
  • The issue impacts shares that have CIFS share property encrypt-data applied as well.
  • In a packet trace, we see STATUS_ACCESS_DENIED being returned to Session Setup or Tree Connect requests
  • EMS may report Nblade.cifsEncSessAccessDenied  or  Nblade.cifsEncShrAccessDenied
  • When the issue is captured in a security trace this will contain the reason for the access being denied

example

::> vserver security trace trace-result show

 Vserver: svm1


 Node            Index Filter Details             Reason
 --------------- ----- -------------------------- -----------------------------------------------------------------
 node1           1     Security Style:  -         Session Setup failed, client does not have encryption capability.

 

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.