South Korea is continuously under DDoS attack.....
The nation was floored after huge streams of junk internet data poured across South Korea's networks last year, targeting the infrastructure of government and businesses in what is known as a DDoS attack.
It took-out parts of the communications networks for up to a week, also hitting US targets, before the malware behind the DDoS attacks self destructed.
He said there have not been further DDoS attacks on the scale of the 2009 assaults, but that attacks have increased in size. The bunkers are hoped to help mitigate part of the problem against further attacks.