What Networking Hardware are you using? Specifically your managed switch

Onscreen5341: > Does this not apply to MikroTik too? Their switches are proprietary too, right? Yes, true. But as said, with a bare network switch like from MikroTik, proprietary software at least is limited to that device and isolated within networking layer/L2. Let’s assume this thing stolidly wants to blow out telemetry to its company or even do malicious things, then it still would need to travel through your IP router / L3 gateway. I.e. this traffic still can be monitored and blocked. In contrast UniFi controller controls both L2 and L3 via auto-configuration - you basically put all networks eggs in one basket and let third party manage own network (if not having an additional outer firewall as you did).