![]() To enable support for the SMBv1 client protocol in newer versions of Windows Server, you need to install the separate SMB 1.0/CIFS File Sharing Support feature. In Windows Server 2016 starting with build 1709 and Windows Server 2019, SMBv1 is disabled by default. Enable/Disable SMB 1.0 on Windows Server 2016/2019 In our case we’ll ignore this information, but you should bear in mind that later this client won’t be able to access shared folders on this SMB server. You need to find this computer or device on the network and update the OS or firmware to a version that supports newer SMB protocol versions: SMBv2 or SMBv3. To stop auditing SMB1 access, use the Windows PowerShell cmdlet Set-SmbServerConfiguration. This event indicates that a client attempted to access the server using SMB1. The event indicates that the client 192.168.1.10 is trying to access the server using the SMB1 protocol. In our example, an event with EventID 3000 from the SMBServer source was found in the log. Get-WinEvent -LogName Microsoft-Windows-SMBServer/Audit You can display the list of events from this event log using the following PowerShell command: In Windows 10 and Windows Server 2016, the SMBv1 protocol is split into two separate components – SMB client and SMB server, which can be enabled/disabled independently. If there are no such clients in the network, you can completely disable SMB 1.0 on the side of file servers (including AD domain controllers) and client desktops. According to the table, old client versions (XP, Server 2003 and some *nix clients) can access network shared folders only using SMB v1.0 protocol. ![]() In one of the previous articles, we showed the table of client- and server-side SMB version compatibility. As a result, your devices will use new, more efficient, secure and functional versions of the SMB protocol when accessing network shares. By disabling SMB 1.0, you can protect Windows computers from a wide range of vulnerabilities in this legacy protocol (the most famous public exploit for SMBv1 is EternalBlue). If there are no SMB 1.x clients left on your network, you must completely disable SMBv1 on all Windows devices.
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