I am looking for a simple device, that can run OPNsense. It should route the traffic from/to my LAN for just one IoT device, that has an unchangeable, fixed IP address. There is not much traffic, and i need only this one device in the subnet (NAT). I am looking for these requirements:
- Two Ethernet Ports (one in LAN, one for the IoT subnet)
- small case / size
- little power usage
- quiet
- cheap
- can run OPNsense
Thank you
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Did you really think this through? Will it be one device only now and forever? And once you get addicted to what kind of things OpnSense can do, are you sure that you do not want to have firewall rules between your WAN and LAN, too?
For that, you would need at leat three ports, even if you do not use a managed switch for VLANs, but just one port for the IoT device.
On the other hand, really cheap devices with just two ports tend to use RealTek NICs, which are known to work badly with OpnSense. If you step this up to Intel NICs, there are devices with 4 ports that can be had for as little as 200€ - I refrain from telling the price in USD at this time, because reasons (exchange rate, 0%, 80& or 145% tariffs, or whatnot?).
I got something similar to this couple weeks ago (swapped SSD and removed the Wi-Fi card):
N1 PRO Intel N150 12GB LPDDR5 RAM 256GB M.2 2242 SSD with 2 x 2.5GbE i226-V Chip
https://www.amazon.com/dp/B0F387XH21 (https://www.amazon.com/dp/B0F387XH21)
$129 after $70 coupon as of this writing.
You'll indeed need a managed switch when you want to add more LANs (as VLANs).