Is Comcast’s Xfinity swapping your settings? No, but it can seem that way

Joseph Rosmann wrote in with a concern about Xfinity, Comcast’s cable TV and internet brand, to which his family subscribes. Starting in November, he and his family’s iPhones and Macs seemed to shift preferentially to Xfinity’s Wi-Fi network and email return address (plus mail server) without them having made any configuration changes of which they’re aware, and even while at home on their own Wi-Fi network.

Joseph wondered if Comcast had developed a technique to inject code or hijack settings that could have carried this out. I don’t believe so in this case, but Comcast does violate the integrity of user’s webpage requests, so it’s not a stretch to suspect it does worse.

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