Yesterday, North Korea was reported to be offline and total state was back to the Stone age. Report says that there was a cyber attack over North Korea which makes it completely offline.
According to Dyn Research, which assesses Internet performance issues, North Korea's national Internet has been completely offline for more than two hours after 24 hours "of increasing instability."
As US president Barack Obama have commented that they will give a payback to the North Korea, so it is been says that the reasons behind the North Korea offline is US. But A White House official told Bloomberg that it had "no new information about North Korea".
According to the North Korea tech blog, North Korea do suffer from the major internet outage, but they have point that out to be as mundane as network maintenance or a failing router. But on the other hand, Madory also told the New York Times that the outage "is consistent with a DDoS attack on their routers."