Those who live in China and use a foreign-run VPN already know this, but China upgraded its firewall not long ago and is throttling access to forbidden sites (such as Facebook, Twitter, and the New York Times) in new, improved, and annoying ways.
Here’s the Guardian’s much-linked-to story on the subject:
China Unicom, one of the biggest telecoms providers in the country, is now killing connections where a VPN is detected, according to one company with a number of users in China.
…Astrill, a VPN provider for users inside and outside China, has emailed its users to warn them that the “Great Firewall” system is blocking at least four of the common protocols used by VPNs, which means that they don’t function. “This GFW update makes a lot of harm to business in China,” the email says. “We believe [the] China censorship minister is a smart man … and this blockage will be removed and things will go back to normal.”