I stopped trusting UPnP on my home network, and half my "just works" devices told on themselves
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Most consumer and ISP-provided routers are plug-and-play. That means several settings are switched on by default for convenience, including UPnP. I prefer to turn off UPnP in my router’s interface. Plenty of cases have been about why the trust model behind UPnP is broken, even though everyone loves the convenience. There’s no authentication; it exposes the WAN and can be vulnerable to botnets. There are even stories about it happening.
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