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Support for SMB signing

Data ONTAP supports SMB signing (over the SMB 1.0 protocol and over the SMB 2.x protocol) when requested by the client. SMB signing helps to ensure that network traffic between the storage system and the client has not been compromised; it does this by preventing replay attacks (also known as man in the middle attacks).

When SMB signing is enabled on the storage system, it is the equivalent of the Microsoft Network server policy Digitally sign communications (if client agrees). For performance reasons, SMB signing is disabled by default on the storage system.