Would you like to learn how to use a group policy to disable the SMBv1 protocol on Windows? In this tutorial, we will show you how to create a group policy to disable the version 1 of the SMB protocol on the domain computers.

• Windows 2012 R2
• Windows 2016
• Windows 2019
• Windows 10
• Windows 7

Hardware List:

The following section presents the list of equipment used to create this tutorial.

Every piece of hardware listed above can be found at Amazon website.

Tutorial GPO - Disable the SMBv1 protocol

On the domain controller, open the group policy management tool.

Windows 2012 - Group Policy Management

Create a new group policy.

Windows 2012 - Group Policy Objects

Enter a name for the new group policy.

Windows - Add GPO

In our example, the new GPO was named: MY-GPO.

On the Group Policy Management screen, expand the folder named Group Policy Objects.

Right-click your new Group Policy Object and select the Edit option.

Windows - Edit GPO

On the group policy editor screen, expand the Computer configuration folder and locate the following item.

Copy to Clipboard

Right-click on the Registry option and create a Registry entry.

GPO - Disable SMBv1

On the registry Window, perform the following configuration.

• Action: Create
• Key Path: SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters
• Value name: SMB1
• Value type: REG_DWORD
• Value data: 0

Click on the OK button.

Group Policy Object - Disable SMB version 1

To save the group policy configuration, you need to close the Group Policy editor.

Congratulations! You have finished the GPO creation.

Tutorial GPO - Disable the SMBv1 protocol

On the Group policy management screen, you need to right-click the Organizational Unit desired and select the option to link an existent GPO.

Windows-2012-Applocker application

In our example, we are going to link the group policy named MY-GPO to the root of the domain.

GPO- tutorial linking

After applying the GPO you need to wait for 10 or 20 minutes.

During this time the GPO will be replicated to other domain controllers.

In our example, we used a GPO to disable the SMBv1 protocol on the domain computers.