Access this computer from the network - security policy setting
- Windows 10, Azure Stack HCI, Windows Server 2022, Windows Server 2019, Windows Server 2016
Describes the best practices, location, values, policy management, and security considerations for the Access this computer from the network security policy setting.
If running Windows Server or Azure Stack HCI Failover Clustering, don't remove Authenticated Users from the Access this computer from the network policy setting. Doing so may induce an unexpected production outage. This is due to the local user account CLIUSR that is used to run the cluster service. CLIUSR is not a member of the local Administrators group and if the Authenticated Users group is removed, the cluster service won't have sufficient rights to function or start properly.
The Access this computer from the network policy setting determines which users can connect to the device from the network. This capability is required by many network protocols, including Server Message Block (SMB)-based protocols, NetBIOS, Common Internet File System (CIFS), and Component Object Model Plus (COM+).
Users, devices, and service accounts gain or lose the Access this computer from network user right by being explicitly or implicitly added or removed from a security group that has been granted this user right. For example, a user account or a machine account may be explicitly added to a custom security group or a built-in security group, or it may be implicitly added by Windows to a computed security group such as Domain Users, Authenticated Users, or Enterprise Domain Controllers. By default, user accounts and machine accounts are granted the Access this computer from network user right when computed groups such as Authenticated Users, and for domain controllers, the Enterprise Domain Controllers group, are defined in the default domain controllers Group Policy Object (GPO).
- User-defined list of accounts
- Not defined
- On desktop devices or member servers, grant this right only to users and administrators.
- On domain controllers, grant this right only to authenticated users, enterprise domain controllers, and administrators.
- On failover clusters, make sure this right is granted to authenticated users.
- This setting includes the Everyone group to ensure backward compatibility. Upon Windows upgrade, after you've verified that all users and groups are correctly migrated, you should remove the Everyone group and use the Authenticated Users group instead.
Computer Configuration\Windows Settings\Security Settings\Local Policies\User Rights Assignment
The following table lists the actual and effective default policy values for the most recent supported versions of Windows. Default values are also listed on the policy’s property page.
|Server type of GPO||Default value|
|Default domain policy||Not defined|
|Default domain controller policy||Everyone, Administrators, Authenticated Users, Enterprise Domain Controllers, Pre-Windows 2000 Compatible Access|
|Stand-alone server default settings||Everyone, Administrators, Users, Backup Operators|
|Domain controller effective default settings||Everyone, Administrators, Authenticated Users, Enterprise Domain Controllers, Pre-Windows 2000 Compatible Access|
|Member server effective default settings||Everyone, Administrators, Users, Backup Operators|
|Client computer effective default settings||Everyone, Administrators, Users, Backup Operators|
When you modify this user right, the following actions might cause users and services to experience network access issues:
- Removing the Enterprise Domain Controllers security group
- Removing the Authenticated Users group or an explicit group that allows users, computers, and service accounts the user right to connect to computers over the network
- Removing all user and machine accounts
A restart of the device isn't required for this policy setting to be effective.
Any change to the user rights assignment for an account becomes effective the next time the owner of the account logs on.
Settings are applied in the following order through a Group Policy Object (GPO), which will overwrite settings on the local computer at the next Group Policy update:
- Local policy settings
- Site policy settings
- Domain policy settings
- OU policy settings
When a local setting is greyed out, it indicates that a GPO currently controls that setting.
This section describes how an attacker might exploit a feature or its configuration, how to implement the countermeasure, and the possible negative consequences of countermeasure implementation.
Users who can connect from their device to the network can access resources on target devices for which they have permission. For example, the Access this computer from the network user right is required for users to connect to shared printers and folders. If this user right is assigned to the Everyone group, anyone in the group can read the files in those shared folders. This situation is unlikely because the groups created by a default installation of at least Windows Server 2008 R2 or Windows 7 don't include the Everyone group. However, if a device is upgraded and the original device includes the Everyone group as part of its defined users and groups, that group is transitioned as part of the upgrade process and is present on the device.
Restrict the Access this computer from the network user right to only those users and groups who require access to the computer. For example, if you configure this policy setting to the Administrators and Users groups, users who sign in to the domain can access resources that are shared from servers in the domain if members of the Domain Users group are included in the local Users group.
Note If you are using IPsec to help secure network communications in your organization, ensure that a group that includes machine accounts is given this right. This right is required for successful computer authentication. Assigning this right to Authenticated Users or Domain Computers meets this requirement.
If you remove the Access this computer from the network user right on domain controllers for all users, no one can sign in to the domain or use network resources. If you remove this user right on member servers, users can't connect to those servers through the network. If you have installed optional components such as ASP.NET or Internet Information Services (IIS), you may need to assign this user right to other accounts that are required by those components. It's important to verify that authorized users are assigned this user right for the devices that they need to access the network.
If running Windows Server or Azure Stack HCI Failover Clustering, don't remove Authenticated Users from the Access this computer from the network policy setting. Doing so may induce an unexpected production outage. This outage is due to the local user account CLIUSR that is used to run the cluster service. CLIUSR isn't a member of the local Administrators group and if the Authenticated Users group is removed, the cluster service won't have sufficient rights to function or start properly.
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