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#11
Not a double NAT.
That'll do it!
If at all possible, reset the router and/or modem. You'll need to read the manufacture's guide on how to do that properly.
The same mess up can happen to a computer with an abrupt power outage. You'll get hard drive errors, Windows errors, etc. Could even damage hardware. It's why you want a UPS (Uninterruptible Power Supply) for the computer and router/modem.
I've had the same thing happen to my router with an abrupt power outage. One of the features on my router started to not act right. Right now I band-aided the issue, but I need to permanently fix it.
Here's something you might find interesting. I'm a long time police scanner enthusiast. I monitor radio communications 24/7. A week ago I experienced yet another very quick power outage. About 45 minutes latter I heard dispatch page the fire department for a wires down or arcing lines to a road some 2 miles from here. It is without a doubt that was the reason for the sudden hiccup on the power line and how it went through like a domino effect.
Moral of the story: Even if it's not near you, an incident like a car crashing into a pole or transformer CAN have an impact on you. Same with a lightning strike some 2 miles or more away... And no, a surge protector or even one built into a UPS is not saving your equipment. It may help if the lightning strike is several miles away and induces a "surge" on the line, but a direct hit and it's game over. You typically need a very expensive lightning arrester installed in the breaker box. Even then, lightning can snake in from anywhere. Not just through the wall outlet.
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