Configuring SMB on your storage system
In addition to the CIFS protocol, Data ONTAP supports the Server Message Block (SMB) 1.0 protocol and the SMB 2.0 and SMB 2.1 protocols.
- Support for the SMB 1.0 protocol
Data ONTAP supports the SMB 1.0 protocol, which extends CIFS with security, file, and disk-management features.
- Support for the SMB 2.0 protocol
In addition to the SMB 1.0 protocol, Data ONTAP supports the SMB 2.0 protocol, which provides several enhancements.
- Support for the SMB 2.1 protocol
In addition to supporting SMB 2.0, Data ONTAP 8.1.1 and later in the 8.1 release family supports SMB 2.1. You need to know which SMB 2.1 enhancements are supported.
- When to enable the SMB 2.0 and SMB 2.1 protocols
There are several file-transferring and interprocess communication enhancements which make the SMB 2.0 and SMB 2.1 protocols a more suitable choice to use in certain scenarios instead of the original SMB 1.0 protocol.
- Enabling or disabling SMB 2.x
You can enable or disable SMB 2.x by using the cifs.smb2.enable option of the options command. This option enables or disables all revisions of SMB 2.x that are available on the installed Data ONTAP version. By default, this option is set to on.
- SMB 2.x and durable handles
Durable handles allow SMB 2.0 clients to open a file and survive a temporary connection loss.
- Monitoring durable handle status
Starting with Data ONTAP 8.1.1 and later releases in the 8.1 release family, you can monitor and display information about durable handles using the lock status command.
- 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).