Thanks for taking the time to post the eventual cause Jeff, much appreciated.
I suspected it was a routing problem, but I really thought the culprit would prove to be your ISP. Especially given the recent changes in that area.
As to why your router is doing what it is doing; An old router I once used had this ‘black-list’ function, where it would maintain a list of sites that it ‘thought’ I should be protected against. I have no idea how it determined these sites were unsafe, but occasionally it would add one of my favourite sites to its list and cause me some grief. To make matters worse, it took some fiddling in the devices CLI to clear the black-list or disable the function entirely.
I know you said that you had reset the router. My old router had a reset button too, but the procedure to actually reset the device was not too obvious. You had to depress the button during power-on and only release it once the device had fully booted.
Anyway, it is good to hear that you have the problem isolated. Well done
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