TLDR: Any standard PC with two or more Ethernet interfaces and OpenBSD with PF.

I like the small Qotom Q305p 3205u computers for this, but any small device will do and if you don't care about the router being small and quiet, any form factor PC will work... just need two or more NICs to route packets from one network to the other.

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rithdmc an hour ago | parent [-]

What throughput do you get on those? I worry latency, speed, and whatnot will be impacted without dedicated silicon.

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pak9rabid 36 minutes ago | parent [-]

Systems like the Banana Pi 4 can easily route traffic at near 10 gigabit wire speed. Granted, this particular system has very good hardware offloading capabilities.

	▲	rithdmc 31 minutes ago \| parent [-]
		Many thanks!