Which SMB version is used in Windows Server 2022?
There are several different versions (or dialects) of the SMB protocol that were introduced with different versions of Windows: Show
SMB 1 - Windows 2000 The version of SMB used between two computers will be the highest dialect supported by both. This means if a Windows 8 machine is talking to a Windows 8 or Windows Server 2012 machine, it will use SMB 3.0. If a Windows 10 machine is talking to Windows Server 2008 R2, then the highest common level is SMB 2.1. To check which SMB version is being used over a connection between two computers, run the following PowerShell command: Get-SmbConnection which will show the SMB connections and the dialect that is being used. PS C:\Windows\system32> Get-SmbConnection To check if encryption is enabled or not over a connection you can use this
command:
Once you know a connection to a share in SMB3 is encrypted you know all traffic will be encrypted between the two computers over that share, including ViceVersa and VVEngine. There are no special settings needed in ViceVersa or VVEngine. The Server Message Block (SMB) network protocol is used to share and access folders, files, printers, and other devices over network (TCP port 445). In this article, we will look at which versions (dialects) of SMB are available in different versions of Windows (and how they relate to samba versions on Linux); how to check the SMB version in use on your computer; and how to enable or disable the SMBv1, SMBv2, and SMBv3 dialects. SMB Protocol Versions in WindowsThere are several versions of the SMB protocol (dialects) that have consistently appeared in new Windows versions (and samba) :
Samba is used to implement the SMB protocol in Linux/Unix . Samba 4.14 and newer uses SMB 2.1 by default. In SMB network communication, the client and server use the maximum SMB protocol version supported by both the client and the server. The summary table of SMB version compatibility looks like this. Using this table, you can determine the version of the SMB protocol that is selected when different versions of Windows interact:
For example, if a client computer running Windows 8.1 connects to a file server with Windows Server 2016, the SMB 3.0.2 protocol will be used. According to the table, Windows XP and Windows Server 2003 can use only SMB 1.0 to access shared folders and files. The SMBv1 is disabled in newer versions of Windows Server (2012 R2/2016). So, if you are still using Windows XP and Windows Server 2003 devices on your network, they won’t be able to access shared folders on the file server running Windows Server 2016. If Windows Server 2019/2016 with disabled SMB v1.0 is used as a domain controller, then Windows XP/Server 2003 clients won’t be able to access the SYSVOL and NETLOGON folders on domain controllers and authenticate with AD. You may receive the following error when trying to connect to a shared folder on a file server with SMBv1 disabled: The specified network name is no longer available How to Check SMB Version on Windows?Let’s look on how to find out which versions of the SMB are enabled on your Windows device. On Windows 10/8.1 and Windows Server 2019/2016/2012R2, you can check the status of various dialects of the SMB protocol using PowerShell:
This command returned that the SMB1 protocol is disabled ( Note that the SMBv3 and SMBv2 protocols are closely related. You cannot disable or enable SMBv3 or SMBv2 separately. They are always enabled/disabled only together because they share the same stack. On Windows 7, Vista, and Windows Server 2008 R2/2008:
If there are no parameters named Also on these Windows versions, you can check which SMB client dialects are allowed to connect to remote hosts:
SERVICE_NAME: mrxsmb10 TYPE : 2 FILE_SYSTEM_DRIVER STATE : 4 RUNNING (STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN) WIN32_EXIT_CODE : 0 (0x0) SERVICE_EXIT_CODE : 0 (0x0) CHECKPOINT : 0x0 WAIT_HINT : 0x0
SERVICE_NAME: mrxsmb20 TYPE : 2 FILE_SYSTEM_DRIVER STATE : 4 RUNNING (STOPPABLE, NOT_PAUSABLE, IGNORES_SHUTDOWN) WIN32_EXIT_CODE : 0 (0x0) SERVICE_EXIT_CODE : 0 (0x0) CHECKPOINT : 0x0 WAIT_HINT : 0x0 In both cases, the services are running ( Checking Used SMB Dialects with Get-SMBConnectionWhen communicating over SMB, computers use the maximum SMB version supported by both the client and the server. The The SMB version used to connect to the remote server (ServerName) is listed in the Dialect column. You can display information about the SMB versions used to access a specific server:
If you want to display if SMB encryption is in use (introduced in SMB 3.0):
On Linux, you can display a list of SMB connections and used dialects in samba using the command:
On the Windows SMB server side, you can display a list of the versions of the SMB protocols that the clients are currently using. Run the command:
You can use PowerShell to enable auditing of the SMB versions used for the connection:
SMB connection events can then be exported from Event Viewer logs:
Stop Using the Insecure SMBv1 ProtocolOver the past few years, Microsoft has systematically disabled the legacy SMB 1.0 protocol in all products for security reasons. This is due to the large number of critical vulnerabilities in this protocol (remember the incidents with wannacrypt and petya ransomware, which exploited a vulnerability in the SMBv1 protocol). Microsoft and other IT companies strongly recommend that you stop using SMBv1 in your network. However, disabling SMBv1 can cause problems with accessing shared files and folders on newer versions of Windows 10 (Windows Server 2016/2019) from legacy clients (Windows XP, Windows Server 2003), third-party OS (Mac OSX 10.8 Mountain Lion, Snow Leopard, Mavericks, old Linux distros), old NAS devices. If there are no legacy devices left on your network that support only SMBv1, be sure to disable this SMB dialect in Windows. If you have clients running Windows XP, Windows Server 2003, or other devices that only support SMBv1, they should be updated or isolated. How to Enable and Disable SMBv1, SMBv2, and SMBv3 on Windows?Let’s look at ways to enable and disable different SMB versions on Windows. We’ll cover SMB client and server management (they are different Windows components). Windows 10, 8.1, and Windows Server 2019/2016/2012R2: Disable SMBv1 client and server:
Disable SMBv1 server only:
Enable SMBv1 client and server:
Enable only SMBv1 server:
Disable SMBv2 and SMBv3 server:
Enable SMBv2 and SMBv3 server:
Windows 7, Vista, and Windows Server 2008 R2/2008: Disable SMBv1 server:
Enable SMBv1 server:
Disable SMBv1 client:
Enable SMBv1 client:
Disable SMBv2 server:
Enable SMBv2 server:
Disable SMBv2 client:
Enable SMBv2 client:
You can disable SMBv1 server on domain joined computers by deploying the following registry parameter through the GPO:
Set the registry parameter To disable the SMBv1 client, you need to propagate the following registry setting:
What version of SMB does Windows use?Answer. Does Windows server use SMB?Summary. Windows supports file and printer-sharing traffic by using the SMB protocol directly hosted on TCP. SMB 1.0 and older CIFS traffic supported the NetBIOS over TCP (NBT) protocol supported the UDP transport, but starting in Windows Vista and Windows Server 2008 with SMB 2.0.
What version of SMB does server 2012 R2 use?SMB Protocol Versions in Windows. Is SMBv1 still supported?SMBv1 is not installed by default in Windows 10 version 1709, Windows Server version 1709 and later versions | Microsoft Learn. This browser is no longer supported.
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