They make fanless metal body mini computers and come in many variations on aliexpress. I purchased a unit a few months back to run pfsense (free routing softwar

They make fanless metal body mini computers and come in many variations on aliexpress. I purchased a unit a few months back to run pfsense (free routing software based on freebsd). They normally use intel based motherboard/ethernet ports in 2-4 port configurations, making them good stable platforms. They usually take a few weeks to arrive because they ship from China. They don't have the polish of an apple product or sell under a popular brand name, so they are not well known.