Domain controller: Refuse machine account password changes

Applies To: Windows Server 2003, Windows Vista, Windows XP, Windows Server 2008, Windows 7, Windows 8.1, Windows Server 2008 R2, Windows Server 2012 R2, Windows Server 2012, Windows 8

This security policy reference topic for the IT professional describes the best practices, location, values, and security considerations for this policy setting.

Reference

This policy setting enables or disables blocking a domain controller from accepting password change requests for computer accounts. By default, member computers change their computer account passwords every 30 days. If enabled, the domain controller will refuse computer account password change requests.

Possible values

• Enabled

  When enabled, this setting does not allow a domain controller to accept any changes to a computer account's password.

• Disabled

  When disabled, this setting allows a domain controller to accept any changes to a computer account's password.

• Not defined

  Same as Disabled.

Best practices

1. Enabling this policy setting on all domain controllers in a domain prevents domain members from changing their computer account passwords. This, in turn, leaves those passwords susceptible to attack. Make sure that this conforms to your overall security policy for the domain.

Location

GPO_name\Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options

Default values

The following table lists the actual and effective default values for this policy. Default values are also listed on the policy’s property page.

Operating system version differences

There are no differences in this policy between operating systems beginning with Windows Server 2003.

Policy management

This section describes features and tools that are available to help you manage this policy.

Restart requirement

None. Changes to this policy become effective without a computer restart when they are saved locally or distributed through Group Policy.

Security considerations

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.

Vulnerability

If you enable this policy setting on all domain controllers in a domain, domain members cannot change their computer account passwords, and those passwords are more susceptible to attack.

Countermeasure

Disable the Domain controller: Refuse machine account password changes setting.

Potential impact

None. This is the default configuration.