Configure Wake on LAN on Dell Computer

I need assistance in configuring Wake on LAN on my Dell computer. I've already set the necessary BIOS settings, and the computer is running Windows with OpenVPN as my VPN software.

Your tasks will include:
- First, ensuring Wake on LAN works on a LAN, within the same subnetwork.
- Then, extending this configuration to work through my existing VPN tunnel.

Ideal skills for the job include:
- Previous experience with Wake on LAN configuration.
- Familiarity with Dell computers and BIOS settings.
- Proficiency in Windows operating system.
- Experience with OpenVPN software.
- Networking knowledge for subnetwork configuration.

Please let me know if you can help with this.