the lock is actually for all external ports. the only one i have
not extensively tested was the rear firewire ports. but the rear
usb are disabled while locked.
That's not what I see on our Xserve G5 2.0 GHz single processor. The
rear USB ports do appear to lock out a USB keyboard if attached, but
an APC SmartUPS 750 1u UPS attached to the rear USB port is seen even
if the lock is locked. So the USB locking seems to be sensitive to
the type of device.
