I just updated to 10.2.8 and, at least on my laptop, the old checkbox in the Energy Saver pane for enabling and disabling 'Wake on admin access' is gone ... but ... we can still use pmset.
So, here is how to enable wake on admin access:
sudo pmset womp 1To disable it:
sudo pmset womp 0BTW, womp stands for "wake on ethernet magic packet."
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031007132543484