The OpenVPN Odd-venture

Virtual Private Network (VPN) is Local Area Network (LAN) on steroids powered by the internet, and also more complex to setup. I was tasked at work to setup an OpenVPN server to a client that already has an existing connection to another OpenVPN server, so my task is to add this other server to the client while ensuring the current VPN connection won't be disrupted.

Thanks to this blog, the OpenVPN documentation, and this blog (albeit focused on OpenBSD), I was able to figure out how to setup the VPN, but not without some trial and error adventure along the way.