What will happen now? Again, we aren’t trying to increase help desk calls with this policy. I am a Platforms PFE here at Microsoft and work primarily in Active Directory and Group Policy. Vulnerability Manager Plus helps you to monitor security configurations and resolve misconfigurations in your network systems from a centralized console. This is especially dangerous considering that no credentials other than access to the network are necessary to lock the accounts. Default: 0. My suggestion is simple, make sure your password policy is strong. Brute force password attacks can be automated to try thousands or even millions of password combinations for … Not all apps that are used in your environment effectively manage how many times a user can attempt to sign-in. Implementing these changes goes a long way towards securing your environment. If an account lockout threshold is defined, this reset time must be less than or equal to the Account lockout duration. And by the way, this is yet another reason to tell management that account lockout policies are old school and have worn out their welcome. Reset account lockout counter after: 1 minutes. Configure the “Reset account lockout counter after” policy. An example of an edge solution is the following write-up for the Citrix Netscaler product: Preventing Brute Force logon Attacks to the Citrix NetScaler Access Gateway or AAA for TM logon Page. Note : The current recommended security baseline for Account Lockout Threshold should be set to a minimum of 10 invalid login attempts. And because of this, you should seriously consider setting this value to it’s lowest setting of 1 minute. This configuration also helps reduce Help Desk calls because users cannot accidentally lock themselves out of their accounts. MCSA|MCITP SA|Microsoft Exchange 2003 Blog - http://prashant1987.wordpress.com Disclaimer: This posting is provided AS-IS with no warranties/guarantees and confers no rights. Any settings between 1 and 99,999 minutes will automatically unlock the account. Community to share and get the latest about Microsoft Learn. User logged into multiple computers when initiating a password change. The Account Lockout Policy in Active Directory is not what it seems. If the value specified for “Account lockout threshold” is met before the counter resets, the account is locked out. You can set a value between 0 and 999 failed logon attempts. Because it’s still possible to trip up an account lockout policy even with a threshold of 50 invalid logon attempts (trust me, I’ve experienced it), you might want to consider scrapping the idea altogether. Once an account is locked out, the “Account lockout duration” is length of time the account will be locked out until resetting. Recently a customer approached me with a question I thought I knew the answer to, "Can the administrator account be locked out"? With 50 invalid logon attempts required to lockout an account, the lockout policy is unlikely to be tripped unless an actual brute force attack is underway. Reset Account Lockout Counter After This setting specifies the time that must pass after an invalid logon attempt before the counter resets to zero. In this manner, he can repeatedly try multiple attempts without the account getting locked out. Follow the below steps in GPO to resolve the misconfiguration. Default: None, because this policy setting only has meaning when an Account lockout threshold is specified. Enabling this setting will likely generate a number of additional Help Desk calls. If a user As with other account lockout settings, this value is more of a guideline than a rule or best practice because there is no "one size fits all." With most normal account lockout policies set to 5 or 6 attempts, the iPhone WILL trip the policy. And that assumes the hacker even knows what your account lockout policy is set to in the first place. reset unsuccessful login count: chsec -f /etc/security/lastlog -a unsuccessful_login_count=0 -s unlock account: chuser account_locked=false to lock an AIX account: chuser account_locked=true check if locked: lsuser For Linux like redhat distros. For example, assume that the "account lockout threshold" is configured to lockout accounts after 5 failed logon attempts and "reset account lockout counter after" is set to 2 minutes. This gets even worse if a user has more than one mobile device.