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 dns
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.
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Airport wi-fi that works for everything except one app is almost always a captive portal that has expired quietly in the background. Load any plain HTTP page and it will admit it.
