This article describes how to enable and disable Server Message Block (SMB) version 1 (SMBv1), SMB version 2 (SMBv2), and SMB version 3 (SMBv3) on the SMB client and server components.
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Summary
Feb 10, 2020 In macOS High Sierra 10.13 and later, the default settings for browsing network folders such as Server Message Block (SMB) shares are ideal for most organizations and users. But you can make adjustments to optimize SMB browsing in enterprise environments.
Important
We recommend that you do not disable SMBv2 or SMBv3. Disable SMBv2 or SMBv3 only as a temporary troubleshooting measure. Do not leave SMBv2 or SMBv3 disabled.
In Windows 7 and Windows Server 2008 R2, disabling SMBv2 deactivates the following functionality:
In Windows 8, Windows 8.1, Windows 10, Windows Server 2012, Windows Server 2012 R2, Windows Server 2016, and Windows Server 2019, disabling SMBv3 deactivates the following functionality (and also the SMBv2 functionality that's described in the previous list):
More Information
The SMBv2 protocol was introduced in Windows Vista and Windows Server 2008.
The SMBv3 protocol was introduced in Windows 8 and Windows Server 2012.
For more information about the capabilities of SMBv2 and SMBv3 capabilities, see the following articles:
How to gracefully remove SMB v1 in Windows 8.1, Windows 10, Windows 2012 R2, Windows Server 2016, and Windows Server 2019PowerShell methodsAdjust Windows Smb For Macos MacSMB v1 (client and server)
Windows Server 2012 R2, Windows Server 2016, Windows Server 2019: Server Manager method for disabling SMBSMB v1Windows 8.1 and Windows 10: PowerShell methodSMB v1 Protocol
SMB v2/v3 Protocol (only disables SMB v2/v3 Server)
Windows 8.1 and Windows 10: Add or Remove Programs methodHow to detect status, enable, and disable SMB protocols on the SMB ServerFor Windows 8 and Windows Server 2012
Windows 8 and Windows Server 2012 introduce the new Set-SMBServerConfiguration Windows PowerShell cmdlet. The cmdlet enables you to enable or disable the SMBv1, SMBv2, and SMBv3 protocols on the server component.
Newest update of chrome for what update of macos windows. Note
When you enable or disable SMBv2 in Windows 8 or Windows Server 2012, SMBv3 is also enabled or disabled. This behavior occurs because these protocols share the same stack.
You do not have to restart the computer after you run the Set-SMBServerConfiguration cmdlet.
SMB v1 on SMB Server![]()
For more information, see Server storage at Microsoft.
SMB v2/v3 on SMB Server
For Windows 7, Windows Server 2008 R2, Windows Vista, and Windows Server 2008
To enable or disable SMB protocols on an SMB Server that is running Windows 7, Windows Server 2008 R2, Windows Vista, or Windows Server 2008, use Windows PowerShell or Registry Editor.
PowerShell methods
Note
This method requires PowerShell 2.0 or later version of PowerShell.
SMB v1 on SMB Server
Detect:
Default configuration = Enabled (No registry key is created), so no SMB1 value will be returned
Disable:
Enable:
Note You must restart the computer after you make these changes.For more information, see Server storage at Microsoft.
SMB v2/v3 on SMB Server
Detect:
Disable:
Enable:
Note
You must restart the computer after you make these changes.
Registry EditorAdjust Windows Smb For Macos Mac
Important
Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.
To enable or disable SMBv1 on the SMB server, configure the following registry key:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParameters
To enable or disable SMBv2 on the SMB server, configure the following registry key:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParameters
Note
You must restart the computer after you make these changes.
How to detect status, enable, and disable SMB protocols on the SMB ClientFor Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, and Windows Server 2012
Note Ion fury for macos.
When you enable or disable SMBv2 in Windows 8 or in Windows Server 2012, SMBv3 is also enabled or disabled. This behavior occurs because these protocols share the same stack.
SMB v1 on SMB Client
For more information, see Server storage at Microsoft
SMB v2/v3 on SMB Client
Note
Disable SMBv1 Server with Group Policy
This procedure configures the following new item in the registry:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanServerParameters
To configure this by using Group Policy, follow these steps:
In the New Registry Propertiesdialog box, select the following:
This disables the SMBv1 Server components. This Group Policy must be applied to all necessary workstations, servers, and domain controllers in the domain.
Note
WMI filters can also be set to exclude unsupported operating systems or selected exclusions, such as Windows XP.
Important
Be careful when you make these changes on domain controllers on which legacy Windows XP or older Linux and third-party systems (that do not support SMBv2 or SMBv3) require access to SYSVOL or other file shares where SMB v1 is being disabled.
Disable SMBv1 Client with Group PolicyAdjust Windows Smb For Macos Windows 7
To disable the SMBv1 client, the services registry key needs to be updated to disable the start of MRxSMB10 and then the dependency on MRxSMB10 needs to be removed from the entry for LanmanWorkstation so that it can start normally without requiring MRxSMB10 to first start.
This will update and replace the default values in the following 2 items in the registry:
https://balancenew517.weebly.com/blog/fuse-for-macos-sshfs. HKEY_LOCAL_MACHINESYSTEMCurrentControlSetservicesmrxsmb10
Registry entry: Start REG_DWORD: 4= Disabled
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanWorkstation
Registry entry: DependOnService REG_MULTI_SZ: 'Bowser','MRxSmb20″,'NSI'
![]()
Note
The default included MRxSMB10 which is now removed as dependency.
To configure this by using Group Policy, follow these steps:
SummaryMacos Smb Shares
If all the settings are in the same Group Policy Object (GPO), Group Policy Management displays the following settings.
Testing and validationAdjust Windows Smb For Macos Download
After these are configured, allow the policy to replicate and update. As necessary for testing, run gpupdate /force at a command prompt, and then review the target computers to make sure that the registry settings are applied correctly. Make sure SMB v2 and SMB v3 is functioning for all other systems in the environment.
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