- 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.