http://www.technologyreview.com/new...s-an-unfixable-hole-in-chinas-great-firewall/ It's not really unfixable, just harder. Also, it doesn't help with sites that don't use big league content delivery networks like Akamai. Basically they have a way of asking the content delivery network for pages so that it doesn't look like you're reading Facebook. China could probably reverse engineer that, know what you're really doing, and block that. Other places, like Iran, will probably be slower to patch for that.