Linux – Does wake-on LAN/WOL depend on hardware or the operating system

OK, as much as I really don't condone putting a server to sleep, check the following

• Start
• Control panel
• Power
• Just below the currently select plan, click "Change Plan Settings"
• Click the link for "Change settings that are currently unavailable"
• OK to the UAC
• Changed Advanced Power Settings
• In the list that is presented, locate your network card and look for a property called "Allow this device to wake the computer" - make sure it is set to Yes.

If you cannot find the setting there, check in the following location:

• Start
• Control Panel
• System
• Device Manager
• OK to UAC
• Locate your network card, right-click and go to Properties
• Go to the Power Management tab
• Tick "Allow this device to wake the computer"
• Ensure that "Only allow management stations to wake the computer" is un-checked

1) Wake up on LAN is a feature of the BIOS and network card:

Wake-on-LAN support is implemented on the motherboard (BIOS) of a computer and the network interface (firmware), and is consequently not dependent on the operating system (and NIC drivers) running on the hardware, although the operating system can sometimes control the Wake-on-LAN behaviour.

Source

2) The connection type of the machine sending the wake up signal shouldn't matter. As long as it is fully connected to the network they should be able to send the signal.

In case the computer being woken is communicating via Wi-Fi, the wake-up-packet can be sent via Wireless Multimedia Extensions (WMM)

3) There are tools to help you do this, though configuring the Server should just be a matter of setting up the BIOS correctly. The wake up is done by what Wikipedia calls a "Magic Packet" that contains the IP address of the server to be woken and the "wake-up" packet. This can be sent by any script/program that can access the network:

wolcmd 001122334455 10.0.0.2 255.255.255.255 7

(from the same Wikipedia page).

4) WOL does work over the Internet.