Post #1504770

2026-04-22 00:27 UTC

Oh no! /s What a joyous sight! Our new Samsung TV will never see the outside world. It's connected to our network via ethernet, locked on a VLAN so Home Assistant can connect to it, but it can see nothing except my local DNS server (for now). I've preemptively blocked its WiFi MAC address in case anyone ever accidentally tries to "help" by connecting it to the WiFi. Fully working with Home Assistant. Dumb screen otherwise. Perfect. #homeassistant #samsung #tv #opnsense #firewall #privacy

Replies (4)

@trib@aus.social 2026-04-22 00:44

@matt@mastodon.knight.fyi I should do this with ours. What are you letting Home Assistant do with it?

Open ##1505828
@leffe@social.linux.pizza 2026-04-22 01:07

@matt@mastodon.knight.fyi Perfect. Another good way is if one can block the TV from accessing the internet in the router settings. Then it doesn't matter if it's wired or not. I do this for mine, and for various other iot devices that talk directly to Home Assistant.

Open ##1506494
@JCBlubaugh@mastodon.social 2026-04-22 01:09

@matt@mastodon.knight.fyi I am 67 y.o. I never had a TV that I hated until I bought an LG “smart “ television.

Open ##1506564
@matt@mastodon.knight.fyi 2026-04-22 00:32

It's hitting my DNS server once every 2 seconds for a CDN domain, and every 12 seconds for a time domain. Before I blocked those DNS queries, it was attempting (and failing) to reach them on port 443. I wonder if this still works: https://syntaxslinger.com/posts/tricking-samsung-tvs-into-thinking-they-have-internet/ or if it will fail due to an invalid HTTPS certificate.... I've not seen it fall back to port 80. It's not really hurting anything the way it is though, so no big deal. #dns #mitm

Open ##2820731