Old Macs, iPhones, PlayStation 3 and Nintendo 3DS gaming consoles, an unknown number of smart TVs, set-top boxes and other “smart” devices, and even some PlayStation 4s may lose some internet connectivity next week.
That’s because a widely used digital certificate used to verify secure internet connections expires on Sept. 30, and millions of older devices won’t be able to update to install newer certificates.
As a result, many activities that requires a secure internet connection — from watching Netflix to checking your email to reading regular websites — may not work on older devices.
None of this is information that should directly concern the average internet user, but if some of your favorite sites or online services go dark on Sept. 30, this might be why.
I've added an update about IIS at the end of the post as some reports suggest that manual intervention may be required for a smooth transition to the new certificate chain. If anyone can confirm this it'd be much appreciated!
— Scott Helme (@Scott_Helme) September 21, 2021
h/t Anon Braveheart