Setting what the Front Panel Power Button does

Configure->LocalConfig->FrontButton

On the front panel of your Server there will normally be a power button. On some systems it may be the only button, on others it may be labelled "Green" and be in addition to a normal power ON/OFF switch. If your hardware supports Advanced Power Management, this button will normally cause the Server to shut itself down and switch itself off.  This option allows you to disable this function so that the button is ignored completely.

The default is "Press to Shutdown".