You can enable lockdown mode from the Direct Console User Interface (DCUI).
About this task
If you enable or disable lockdown mode using the Direct Console User Interface, permissions for users on the host are discarded. To preserve these permissions, you must enable and disable lockdown mode using a vSphere Web Client connected to vCenter Server.
- At the Direct Console User Interface of the host, press F2 and log in.
- Scroll to the Configure Lockdown Mode setting and press Enter.
- Press Esc until you return to the main menu of the Direct Console User Interface.