Wake on LAN/PXE/etc - force computer to shutdown/pwr cycle

I've been looking for an answer to this question all over the 'Net, but haven't really found a definitive answer.

I'm looking to be able to use some kind of remote ability to reboot a computer when doing so through normal means is unavailable (like if the computer is frozen/unresponsive). I know I can accomplish the turning on of the computer using Wake on LAN, but I really don't know what I could use to trigger the computer to either turn off or reboot.

Any ideas would be appreciated. I'm trying to stay away from buying additional hardware if possible because this would be deployed across a network of hundreds of computers.

Thanks.

http://www.dslwebserver.com/main/fr_ind ... tdown.html

http://www.snapfiles.com/shareware/syst ... tdown.html

http://users.pandora.be/jbosman/poweroff/poweroff.htm

http://www.poweroverethernet.com/poe/co ... full/1522/

http://www.codeproject.com/csharp/Remot ... ission.asp

http://www.protect-me.com/rtm/

http://networking.earthweb.com/netsysm/ ... php/623391

http://www.librarysmith.co.uk/content/s ... teshutdown

http://www.remotelyanywhere.com/product ... dition.asp

You never said what the OS was ,,so

This is for W2K:

http://www.microsoft.com/resources/docu ... _jleo.mspx

http://support.microsoft.com/default.as ... -us;317371

http://www.sysinternals.com/ntw2k/freew ... down.shtml

OS is Linux (Fedora Core 2, RHEL, etc). A software-based solution will not solve my problem. I need to be able to power cycle the machine when it is not responsive.

How remotely are we talking here? Like, across a room or across a city?

Then put this question to the Unix & Linux forum ,right above this one.

No, he is looking for a hardware solution. This is the right section to post in.

yeah, I would like a solution to this too.
It is a very common problem

For remote network control power switching look to Dataprobe iBoot family of products. I have used them for years, after trying several other brands.

275 $$ seems too much for such a "simple" device.
Perhaps a DIY with an old mobile and a light-relay on its screen would do the job.

Of course it's all matter or importance.
Here I am talking about an inaccessible home server e.g. on the roof