Nicole Perlroth, reporting for the New York Times:
The China Internet Network Information Center, a state-run agency that deals with Internet affairs, said it had traced the problem to the country’s domain name system. And one of China’s biggest antivirus software vendors, Qihoo 360 Technology, said the problems affected roughly three-quarters of the country’s domain name system servers.
Those servers, which act as a switchboard for Internet traffic behind China’s Great Firewall, routed traffic from some of China’s most popular sites, including Baidu and Sina, to a block of Internet addresses registered to Sophidea Incorporated, a mysterious company housed on a residential street in Cheyenne, Wyo.
A simple Google search reveals that the address on Thomes Avenue in Cheyenne is not a corporate headquarters, but a 1,700-square-foot brick house with a manicured lawn.