ESXI-06-000006 - The system must enforce the unlock timeout of 15 minutes after a user account is locked out.


By limiting the number of failed login attempts, the risk of unauthorized access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account.


From the vSphere Client select the ESXi Host and go to Configuration >> Advanced Settings. Select the Security.AccountUnlockTime value and configure it to 900.


From a PowerCLI command prompt while connected to the ESXi host run the following commands:

Get-VMHost | Get-AdvancedSetting -Name Security.AccountUnlockTime | Set-AdvancedSetting -Value 900

Supportive Information

The following resource is also helpful.

This security hardening control applies to the following category of controls within NIST 800-53: Access Control.This control applies to the following type of system VMware.