Access to domain names such as .com blocked Tuesday afternoon in China . State media quoted security experts saying this could have been cyber attack . DIT President Bill Xia told CNN Wednesday that the Internet outage was likely caused by China 's own web censorship system , more widely known by its infamous `` Great Firewall '' moniker , which controls access to content on the Internet inside China deemed unsuitable . Internet users rerouted to U.S.-owned website with links to banned group in China . Comment:
Access to domain names such as .com blocked Tuesday afternoon in China . State media quoted security experts saying this could have been cyber attack . Internet users rerouted to U.S.-owned website with links to banned group in China . Comment: