Windows 2008 account lockout threshold

So in order to strike a balance between both, set the account lockout threshold value to "20". However, if your administrator has provided you access to configure from the local security policy of your computer, you can open the local security policy, click on Account Lockout Policy in the left pane to locate the Account Lockout threshold.

If you're running a Windows-based network, you can configure Account Lockout threshold for all your Windows machines in the network using the Group Policy Object. However, configuring GPO is a tedious process. Now, you can easily fix that with ManageEngine Vulnerability Manager Plus , a threat and vulnerability management solution to detect, assess and remediate vulnerabilities and misconfigurations.

This policy setting is dependent on the Account lockout threshold policy setting that is defined, and it must be greater than or equal to the value specified for the Reset lockout counter after policy setting. This policy setting is supported on versions of Windows that are designated in the Applies To list at the beginning of this topic. If Account lockout threshold is configured, after the specified number of failed attempts, the account will be locked out.

If th Account lockout duration is set to 0, the account will remain locked until an administrator unlocks it manually. It is advisable to set Account lockout duration to approximately 30 minutes. To specify that the account will never be locked out, set the value to 0. The following table lists the actual and effective default policy values for the most recent supported versions of Windows. This section describes features and tools that are available to help you manage this policy setting. Changes to this policy setting become effective without a computer restart when they are saved locally or distributed through Group Policy.

Implementation of this policy setting is dependent on your operational environment. You should consider threat vectors, deployed operating systems, and deployed apps, for example:. The likelihood of an account theft or a DoS attack is based on the security design for your systems and environment. You should set the account lockout threshold in consideration of the known and perceived risk of those threats.

When negotiating encryption types between clients, servers, and domain controllers, the Kerberos protocol can automatically retry account sign-in attempts that count toward the threshold limits that you set in this policy setting.

In environments where different versions of the operating system are deployed, encryption type negotiation increases. Not all apps that are used in your environment effectively manage how many times a user can attempt to sign-in. For instance, if a connection drops repeatedly when a user is running the app, all subsequent failed sign-in attempts count toward the account lockout threshold.

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. Brute force password attacks can use automated methods to try millions of password combinations for any user account.

The effectiveness of such attacks can be almost eliminated if you limit the number of failed sign-in attempts that can be performed. However, a DoS attack could be performed on a domain that has an account lockout threshold configured. An attacker could programmatically attempt a series of password attacks against all users in the organization. If the number of attempts is greater than the account lockout threshold, the attacker might be able to lock every account without needing any special privileges or being authenticated in the network.

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