Bad Provisioning can lead to no modem sync or not recognized as legal DHCP client (MAC not in local neighborhood router tables of legal clients).
Also my Dad's cable ISP (?Grandview?) makes no bones about discouraging privately owned modems. In those words. They say that although you are...
Check your modem sync lights. That is the hard test of reality.
If your modem and the local cable router both lost your provisioning parameters - a power cycle will not work. I had that happen and they persistently told me the same thing. Its your desktop. I had to demand a supervisor because "...
Reread. Its a case of mitigating circumstances according to CERT. Routers are BORING! Not that something cannot be done to routers, but that it WON'T be done in their opinion. Too much work/risk for very little return and fast recovery for owners. So far they are right. But I have seen...
First time Merlin has had a defect that affects my usage. My RT-AC66U starts out with DHCP working correctly but after a few hours or couple days, DHCP starts just passing out IPs without the rest of the associated parameter values. Suddenly no Internet access but DHCP clients can access stuff...
Just saying do not expect a general protocol fix for Krack in Merlin. It would be a frivolous waste of scarce time and resources when Windows and every major distribution of Linux fixed the client side weeks ago.
Sounds like you might be in a "small" business environment. You might want to...
yeah for most practical purposes.
But if the router is patched (non-client) it will not replay the key for the man-in-the-middle to decode. It will force new keys to be sent only once until connection without possible reinstallation on client. At least according to CERT and several vendors...
Actually ISPs DHCP service will go down for short periods of time when they are doing maintenance usually in the middle of Sunday O'Dark hours.
But more likely its your cable or ADSL modem needs a power off reset (unplug it 30+ seconds to be thorough). Basically no Internet reaching the router...