Securing the VM console with password
Starting with v4.3.5, you can secure the VM console menu with a password.
Setting the password from the appliance manager
From System > Set VM Menu password, you can set the password for the console menu.
New menu option to return to password prompt
Option #8 will be added if you enable password for the console.
Password prompt screen
You will have to enter the password before you can the menu.