alt Hacker NewsIt seems like there is a big business opportunity for someone to create a box you attach to your network to filter outgoing info, and incoming ads. Too much work for a tiny team to research what everything is talking to, and MITM your devices and watch DNS queries, etc, but if there was something dead simple to block a Samsung fridge from getting to its ad server, I have to think it would sell.
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You probably overestimate the market for something like that. Most people don't know or care. Those that do are more likely to hang out on HN or adjacent places and know how to deal with it themselves anyways.
A sibling comment says "just use Pi-hole" which kind of works and is also inadequate. A similar system is Ad Guard Home. These work at the DNS level with preset lists of bad domains. They aren't necessarily going to catch your TV calling out to notanadserver.samsung.com because that domain name is not recorded in the list of naughty domains. They are definitely not going to help if your device reaches out via IP.
Another approach is to disallow all DNS or only allow *.netflix.com for the TV. In my experience attempting to only allow certain domains is a game of whackamole where everyone in the house complains their stuff is broken because it needs undocumentedrandomdomain.com.
Until Samsung builds a fridge that won't cool if it goes more than some period of time (a week?) without pinging their servers. They'd probably get away with it given the friction of getting a large appliance out of your home and back to the store. Bonus evil points for making this feature active only after the return/warranty period expires.
That exists, it's called a pi-hole, and it's very popular. It will block the 'tv spy' apps.