The Chinese government is believed to have built the most sophisticated firewall that is intended to manipulate Internet traffic.
Amnesty International reports that China “has the largest recorded number of imprisoned journalists and cyber-dissidents in the world. The offences of which they are accused include communicating with groups abroad, signing online petitions, and calling for reform and an end to corruption.”
GreatFirewallOfChina.org is a website that lets you test your website from behind the firewall. Using proxy servers, the visibility is tested from Beijing, Shenzen, Inner Mongolia, Heilongjiang Province and Yunnan Province.
Test your website: