North Korea's Internet is out: US attack?

North Korea's Internet connectivity is out, possibly the result of a DDoS that may be President Obama's "proportional response" to the Sony Pictures hack, according to the New York Times:

North Korea does very little commercial or government business over the Internet. The country officially has 1,024 Internet protocol addresses, though the actual number may be somewhat higher. By comparison, the United States has billions of addresses.

North Korea's addresses are managed by Star Joint Venture, the state-run Internet provider, which routes many of those connections through China Unicom, China's state-owned telecommunications company.

By Monday morning, those addresses had gone dark for over an hour.

Attack Is Suspected as North Korean Internet Collapses