this post was submitted on 13 Dec 2025
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I’ve got a 42” LG C3 as my gaming monitor. It’s connected to my network so that I can stream content from my plex server. Anybody know if there’s a way I can cut the TV’s access to the internet, to avoid updates etc., while still maintaining access to the home network?
This could be something you do via your router and/or firewall.
Usually it's an option on the router to block certain devices from the Internet. You'll want to assign a static IP to the TV first. If you need any help DM or post in any of the popular Selfhost or Privacy communities and we'll get you.
There's probably a security page with a "block access" option when you log into the router. It'll be brand specific where to look though. If you have a model can point you more
Cheers, yeah I thought about crossposting to c/privacy. I also should have searched first as it seems like it’s pretty common thing to do for networked devices of all sorts.
I’ll give it a go myself and do a write up for novices like myself if I succeed.
I have the same TV and it's wonderful. It's connected to a gaming PC which I access my Jellyfin server from so it's not a problem. I do have a couple Bambu printers here and I set up my ASUS access points to block them from connecting to the outside world, which ended up being pretty easy for me even though I'm a newb.
Yeah that’s the thing, don’t want to spin up a 500w gaming pc just to watch stuff on plex
Simplest is blocking the TV's mac address from accessing the internet
Some TVs will repeatedly bitch and moan about not having an internet connection. For Roku-based tv’s you can choose reset from settings, then select the setup option for no network connection. Then it will shut up about it and act like a “dumb” tv. This requires using an external box for watching any internet-based channels/content.
Yes, that's achievable. I use a DNS override for a couple of LG domains. Doing this, it can't update, although can use other apps.
Having said that, mine gets time from LG servers. So after a power outage, I have to set the time and date manually for SSL connections to work.
With a proper router, you can do this:
Not that simple with my older tele. If it fails to contact LG servers, it doesn't do a NTP update.
You can root it and then there's tools. https://rootmy.tv/ probably won't work for you but has links.
If you manually assign it an ip and don't set a gateway address (or use an invalid one), it won't be able to leave your subnet.
Depends on how robust your router settings are. Depriving a device of WAN access is somewhat straightforward on OpenWRT or any prosumer grade hardware like Ubiquiti, but may not be an option in the more typical home router.
If your router doesn't support blocking WAN, you may be able to block access to LG domains at the router which is a bandaid on the problem.
You can definitely block WAN access for clients with ASUS' routers. You can even install Pi-hole on the router if you use the Asuswrt-Merlin custom firmware.
Do cheaper routers (e.g. low end TP-Link) really not have the option to block WAN access?