"so when the power returns your server will power up."
I avoid to have expensive machines to power up as soon as they see an electron arriving at their PSU - there are situations when power goes up and down for a while, and if the UPS can't keep on feeding properly, things could become nasty.
If you really need to boot remotely wake-on-lan, remote controlled switches, or good server out of band management are better solutions.
Biting the hand that feeds IT
