I wanted to share a project I’ve been tracking for quite some time, and I was honestly shocked there weren’t any YouTube videos on it—because it’s phenomenal. In this video I get OPNsense running on the NanoPi R4S (ARM64), which is a tiny RK3399 single-board computer that makes a really interesting DIY firewall/router platform. I walk through where to grab the right pre-built image, how I burn it to an SD card (same basic flow as OpenWRT), and what to expect on first boot when you hit the web UI at 192.168.1.1. I also dig into the “why” behind this working at all: the PersonalBSD project and the people contributing drivers and images so BSD/OPNsense can actually behave on these ARM boards. A big takeaway is updates—ARM builds don’t always follow the same path as x86, so I show where to check firmware update mirrors and why you may want to follow Christopher’s repo/blog for newer packages and plugins. After that, I do a quick performance/usage look (4GB RAM, low idle CPU), confirm internet connectivity, and even check out themes. My overall view: this is perfect for a separate/segmented network in a homelab (kids/guest VLAN-style setups) and the power draw is basically nothing (5V). I wouldn’t call it a daily-driver replacement for everyone yet—it’s still a hobbyist project—but it’s absolutely worth testing.