We have no home automation devices connected to our network, just phones, computer, printer, and two TVs. My girlfriend purchased a salt monitoring device for our water softener. It is a network attached device from ezsalt.xyz. It connects to an app on a phone. I'm leery of hooking it up. The Registrant Country Code for the domain is Iceland. I'm running an Xfinity modem in bridge mode to a Linksys Smart Wifi router. The router has the ability to setup vlans or a DMZ but both are a bit above my head. My primary concern is that my girlfriend works from home for a pharmaceutical company in clinical trials which slightly elevates her as a target. I'm leaning towards telling her to return it. But if there's a way to isolate this device from the rest of my network, I'd appreciate any suggestions.