All my miners suddenly stopped hashing at about the same time. There was no power failure, power surge, or Internet problem. After power down and power up again they cannot resume hashing. No amount of diagnosis or trial and error has succeeded in my being able to bring them back online or access their IP address. I have not yet re-initialized their SD cards.
I suspect this may have been a cyber attack. Has anyone had a similar experience, or able to share information about this phenomenon?
If this is a cyber attack does it mean my modem/router passwords have been compromised? As well as the passwords to access the miners?
Any input will be appreciated.
I have no idea what happened there, your PC could have gotten hacked. If you dont know how much has been compromized you should change all.
Especially all passwords that you used or logged in that day, the router password, PC password, delete all cookies, and install a good antivirus and clean your PC.
If it doesnt help, reinstall the OS.