Skip to main content
NetApp Knowledge Base

How to troubleshoot SMB Signing on a NetApp Storage Controller

Last Updated:

Applies to

  • Data ONTAP 8.2 7-Mode    
  • ONTAP 9 


SMB Signing is a feature in CIFS that adds a digital signature to a packet transferred between clients and servers. This feature allows the receiver to confirm the packet's origin and authenticity. The failure of a client and server properly negotiating the need or requirement for SMB Signing can result in an unsuccessful connection to a CIFS share.
For further information on SMB Signing and the use cases, see the following articles:

This article covers both Data ONTAP 7-Mode and clustered Data ONTAP. See the appropriate section of this article for the version of Data ONTAP that is running. It might be necessary to capture a packet trace to troubleshoot SMB Signing. At the end of the article is a walk-through on how to review a packet trace to determine if SMB Signing is causing an issue with initial share connection.





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.