Set authentication rate limiter delay (milliseconds)

Supported on: At least Windows Server 2025, Windows 11 24H2

Registry

HKLM Software\Policies\Microsoft\Windows\LanmanServer

Options

InvalidAuthenticationDelayTimeInMs decimal - range 0-10000

Description

This policy controls whether the SMB server will use a default value in milliseconds for the invalid authentication delay. If you configure this policy setting, the authentication rate limiter will use the specified value for delaying invalid authentication attempts. If you do not configure this policy setting, the authentication rate limiter will use the default value or the value from local registry under HKLM\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters.