6.5 KiB
title, description, ms.assetid, ms.prod, ms.mktglfcycl, ms.sitesec, ms.pagetype, author
| title | description | ms.assetid | ms.prod | ms.mktglfcycl | ms.sitesec | ms.pagetype | author |
|---|---|---|---|---|---|---|---|
| Interactive logon Require Domain Controller authentication to unlock workstation (Windows 10) | Describes the best practices, location, values, policy management, and security considerations for the Interactive logon Require Domain Controller authentication to unlock workstation security policy setting. | 97618ed3-e946-47db-a212-b5e7a4fc6ffc | w10 | deploy | library | security | brianlic-msft |
Interactive logon: Require Domain Controller authentication to unlock workstation
Applies to
- Windows 10
Describes the best practices, location, values, policy management, and security considerations for the Interactive logon: Require Domain Controller authentication to unlock workstation security policy setting.
Reference
Unlocking a locked device requires logon information. For domain accounts, the Interactive logon: Require Domain Controller authentication to unlock workstation policy setting determines whether it is necessary to contact a domain controller to unlock a device. Enabling this policy setting requires a domain controller to authenticate the domain account that is being used to unlock the device. Disabling this policy setting allows a user to unlock the device without the computer verifying the logon information with a domain controller. However, if Interactive logon: Number of previous logons to cache (in case domain controller is not available) is set to a value greater than zero, the user's cached credentials will be used to unlock the system.
The device caches (locally in memory) the credentials of any users who have been authenticated. The device uses these cached credentials to authenticate anyone who attempts to unlock the console.
When cached credentials are used, any changes that have recently been made to the account (such as user rights assignments, account lockout, or the account being disabled) are not considered or applied after this authentication process. This means not only that user rights are not updated, but more importantly that disabled accounts are still able to unlock the console of the system.
It is advisable to set Interactive logon: Require Domain Controller authentication to unlock workstation to Enabled and set Interactive logon: Number of previous logons to cache (in case domain controller is not available) to 0. When the console of a device is locked by a user or automatically by a screen saver time-out, the console can only be unlocked if the user is able to re-authenticate to the domain controller. If no domain controller is available, users cannot unlock their devices.
Possible values
- Enabled
- Disabled
- Not defined
Best practices
- Set Interactive logon: Require Domain Controller authentication to unlock workstation to Enabled and set Interactive logon: Number of previous logons to cache (in case domain controller is not available) to 0. When the console of a device is locked by a user or automatically by a screen saver time-out, the console can only be unlocked if the user is able to re-authenticate to the domain controller. If no domain controller is available, users cannot unlock their devices.
Location
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.
| Server type or GPO | Default value |
|---|---|
| Default Domain Policy | Not defined |
| Default Domain Controller Policy | Not defined |
| Stand-Alone Server Default Settings | Disabled |
| DC Effective Default Settings | Disabled |
| Member Server Effective Default Settings | Disabled |
| Client Computer Effective Default Settings | Disabled |
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 device restart when they are saved locally or distributed through Group Policy.
Policy conflict considerations
None
Group Policy
This policy setting can be configured by using the Group Policy Management Console (GPMC) to be distributed through Group Policy Objects (GPOs). If this policy is not contained in a distributed GPO, this policy can be configured on the local computer by using the Local Security Policy snap-in.
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
By default, the device caches locally in memory the credentials of any users who are authenticated. The device uses these cached credentials to authenticate anyone who attempts to unlock the console. When cached credentials are used, any changes that have recently been made to the account—such as user rights assignments, account lockout, or the account being disabled—are not considered or applied after the account is authenticated. User privileges are not updated, and disabled accounts are still able to unlock the console of the device
Countermeasure
Configure the Interactive logon: Require Domain Controller authentication to unlock workstation setting to Enabled and configure the Interactive logon: Number of previous logons to cache (in case domain controller is not available) setting to 0.
Potential impact
When the console on a device is locked by a user or automatically by a screen-saver timeout, the console can be unlocked only if the user can re-authenticate to the domain controller. If no domain controller is available, users cannot unlock their workstations. If you configure the Interactive logon: Number of previous logons to cache (in case domain controller is not available) setting to 0, users whose domain controllers are unavailable (such as mobile or remote users) cannot log on.