Please consider the following aspects for WOL:
1. WOL only works with computers with a unique MAC address known through previous scans.
2. Routers have to transmit Magic Packets to the specified port.
3. In branched networks with many subnets, it may be necessary to activate DIRECTED BROADCASTS. For this, you must know the IP address of the computers through previous scans.
4. With this procedure, the Magic Packets also provide the target subnet.
5. Enabled Directed Broadcasts can cause the WOL within networks to fail, because standard Magic Packets are expected.
6. WOL needs to be enabled in your client’s BIOS settings.
7. Usually, computers don’t wake up if they were switched of by force (4 secs). They only wake up if they were shut down by the operating system or turned off properly via Soft-Off.