China Restricting Access to Virtual Private Networks

China has long had some of the world’s most onerous Internet restrictions. But until now, the authorities had effectively tolerated the proliferation of virtual private networks, or V.P.N.s, as a lifeline for millions of people, from archaeologists to foreign investors, who rely heavily on less-fettered access to the Internet. Now, after a number of V.P.N. companies, including StrongVPN and Golden Frog, complained that the Chinese government had disrupted their services with unprecedented sophistication, a senior official for the first time acknowledged its hand in the attacks and implicitly promised more of the same.