I've been buying these little boxes from AliExpress for years to use as firewalls and routers. My oldest one is almost 9 years old now! OpenBSD installs just fine. Just a BIOS tweak to always boot up after power is restored.
Openwrt works great for gigabit networks with simple firewall rules and no IPS. But used 10-56gbps enterprise equipment is getting pretty cheap, and more complicated firewall configurations need more powerful hardware than the typical openwrt router.
And 56gbps on a home LAN might be overkill, but that’s not important.
@Shkshkshk@nostupidquestions As an admin of my own I usually approve instances manually. Though many times at least after 6.0 update many instances might have missing public/private keys preventing correct federation.