The number of unsuccessful authentication attempts that can be made before a particular connecting computer is blacklisted for a timeout period.

The default value for this VNC parameter is "5".

If you enable this policy setting, the corresponding VNC parameter will be set to the value you specify.

If you disable this policy setting or do not configure it, the corresponding VNC parameter will use the default or user-specified value.

Supported on: Windows 10


Registry PathSoftware\Policies\RealVNC\vncserver
Value NameBlacklistThreshold
Value TypeREG_SZ
Default Value5


Administrative Templates (Computers)

Administrative Templates (Users)