Why your Wi-Fi is fine and your DNS is not
Four commands, in order, that tell you which half of “the internet is down” you are actually standing in.
Everything tagged home-network
The recurring joke and the recurring cause. Grouped by kind, newest first.
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The UniFi controller update reset my DNS filtering profile to “default” without a word. Twenty minutes of very confident debugging later: it was the router, and the router had told nobody.