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OLED 55B7 DNS weirdness


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Hi, 

until yesterday I had my home network set up to use my Raspberry Pi, running PiHole ad blocker, as my DNS server. All was good. Until yesterday, when it died.

So I changed my DHCP server to give out 1.1.1.1 and 9.9.9.9 as DNS servers, and rebooted things. All devices at home continued to work fine.

Except my LG TV. In the network settings, I could see that it had picked up the new DNS servers, and it thought it was connected to the internet, however NONE of the apps would work.

Netflix wouldn't connect, Prime initially wouldn't connect but then allowed me to log in, but wouldn't play anything, Disney wouldn't even start. 

I tried turning the TV off for a few minutes in case something had been cached, but that made no difference, and I was at a loss as to how to fix it.

I checked the cable that I was using (not using wifi), by connecting my laptop to it, and that was fine, and all other devices in the house continued to work.

In the end, I tried manually setting the DNS server to the router gateway address (as it does DNS proxying), and that fixed it. All apps suddenly sprang into life.

Anyone else had a similar issue and managed to resolve it? I doesn't make a lot of sense to me (and I have a network engineering background, so I know how tcp/ip works!).

Any suggestions greatly appreciated.

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