This is a three part series where I will explain how I setup my Raspberry Pi4 as a Wireguard VPN server with ad blocking using Unbound. In this first part we will install OpenBSD to Raspberry Pi 4. I will assume you have a basic understading of installing and using OpenBSD. What do you need? A microSD card (only a small card is needed) A USB storage device where you will install the OS A USB to TTL serial cable USB wireless adapter that is supported by OpenBSD (Optional. Only needed if you don’t want to use the ethernet) A second USB storage to store the sets and wireless firmware.