Here, IPMI is a correct answer as well ;-).
"ReactOS Development List" <ros-dev(a)reactos.org> wrote on Thu, May 26th,
2011, 8:13 AM:
A KVM adapter or switch is what you're after for
'some sort of pre-BIOS control system to be able to control it booting, shut-down and
turn on from the internet' ;)
dmex