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Tiny mini PC with four 2.5Gbps Ethernet ports
(www.cnx-software.com)
Hosting your own services. Preferably at home and on low-power or shared hardware.
Also check out:
My APU4 running OpenWRT kinda struggles to run SQM on my 1.2gbps connection, cuts the download speeds in half, I wonder if this i3 could do any better.
Very likely as the CPU and the Intel NICs in the APU4 are over a decade old now.