A way out for a.out

The Turris MOX is extensible, you can add groups of 8 network ports (plus a WAN port with optional support for PoE). If you add more than 8, however, ports from separate groups will go through a 2.5 Gbps switch. I suggest not buying the batteries included versions, and instead getting all the modules you need separately. This way you have 1 GiB of memory instead of 512 MiB.