I was just testing out Pulseway for my organisation. Wake-On-LAN works fine when on same network through pulseway app. I want this feature over WAN. I have already configured port forwarding in my router. But it gives error - wake-up command failed. Since this feature works on local network, I can simply assume that my network adapter and BIOS settings are configured correct. What might be the problem over internet? (Also: 3rd party WOL apps on Android do not even work on same WIFI. This can relate to some problem). Please assist me.

Thanks for contacting Pulseway support.Please check this article which will provide more information regarding configuring Wake on WAN:

https://intercom.help/pulseway/en/articles/1514224-how-to-configure-wake-on-wan