We were running DD-WRT at the time and I was able to create port mapping for a random UDP port. My last place of work was small, so all the desktops we're on the same Vlan.Īlso I was able to get it to work across the Internet without a VPN. If you send the packet to a broadcast address, it should go to every interface in the layer 2 network. The key is to remember that you need to get a packet to the Ethernet interface when it may not respond to ARP. Other servers, I've been able to cold start just fine. I've personally never been able to achieve 100% success regardless of the Windows power state settings with a cold start, at least on my ASRock motherboard. I mentioned the limitations only to point out that this probably isn't going to work exactly the same on every PC in your deployment. Different motherboard firmware will listen for magic packets in some states but not others. CPUs have many different power states and different operating systems make use of them in different ways. It's not handling normal network traffic for the PC.ĮDIT: As pointed out below, there is a wide variety of WoL implementations and limitations. When the Ethernet port is in sleep mode, it's basically doing nothing except looking for the magic packet sequence. If the computer is asleep, the VPN client connection on it isn't likely to be active or capable of signaling its own sleeping adapter. The magic packet is a special type of broadcast Ethernet frame (layer 2) and it could be forwarded over a VPN with the correct configuration, but it would almost certainly have to be a site-to-site VPN with a separate router on the client side to manage the VPN connection. It will make the wifi adapter stay on at all times and cause battery drain and possibly overheating if you put it in a laptop bag. Wireless WoL is technically possible but not recommended. It can't cold start a PC that's not already in sleep mode. Take note that WoL can only wake a sleeping computer. You will most likely need to modify a BIOS setting to allow WoL on the wired adapter, and also modify the settings in Windows Device Manager for the wired adapter to allow the device to wake the computer. This is exactly what WoL is designed to accomplish.
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