[2] https://en.wikipedia.org/wiki/Turris_Omnia

[3] https://docs.turris.cz/hw/omnia/omnia/

These two and similar were what I had in mind.

Though I don't have them. But considered them a few years ago. But I've chosen another path, of really dark art ;-> (Don't ask)

edit:

Oh, and

[4] https://espressobin.net/

The smaller, and more affordable option from the makers of [1]

But this is all from three, or even four years ago?

I don't even know if that Turris Omnia thing is EOL meanwhile?

They wanted to make something even more modular.

Anyways, all MARVELL based and thus IIRC with working offloading under Linux, though not mainlined at the time.

[5] https://en.wikipedia.org/wiki/Marvell_Technology,_Inc.

edit: Funny, Amazon.com says they have 9 Turris in stock

[6] https://www.amazon.com/Turris-hi-Performance-printserver-Vir...

While amazon.de has 19.

So they should be available. But about 400, instead of maybe 40 to 200 for some cheap plastic trash which melts or resets if you look at it the wrong way.