Originally published at: http://www.howtogeek.com/192642/how-to-remotely-turn-on-your-pc-over-the-internet/
If you use remote desktop, remote file access, or other server software, you may leave your computer on at home or work when you leave the house. This uses more power. Instead, you could simply remotely power on your PC whenever you need to use it.
I assume this only works with a wired network (the PC is connected to the network with an Ethernet cable) and won't work if the PC is connected to the network wirelessly.
Correction: If your PC has the IP address 192.168.0.123, you’d enter 192.168.0.255 as the broadcast address.
I use a little utility called "Magic Packet Sender"
However, this does require the port-forwarding method when you're remote.
I want to know this also.
There is something called WoWLAN, but it's almost certainly not implemented on your PC.
If your PC supports WOL (and not all do), you'll almost certainly have to run an Ethernet cable.
Sorry if I am missing something, but couldn't this give a hacker direct access to your PC, if all they need to know is your router's IP address?
No. Turning on a computer only requires that the PC see a packet on the network; the packet itself doesn't need to be sent to a port that is active on the computer, and if you send the packet to the broadcast address, it couldn't really be used for any useful purpose, anyway. At best, someone might use it for some sort of DoS attack, but there's a very low likelihood of this, since there's no way of knowing from the outside whether a UDP port is open or not.
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