China’s Great Firewall suffers its biggest leak ever as 500GB of source code and docs spill online — censorship tool has been sold to three different countries

A massive leak of over 500GB of internal documents and source code from China's Great Firewall, including details on deep packet inspection platforms and VPN detection, has been confirmed. The leaked material reveals the internal architecture of a commercial platform called 'Tiangou' designed for ISPs and border gateways, with deployments in countries like Myanmar and equipment exported to Pakistan, Ethiopia, and Kazakhstan. The leak offers insights into how China's censorship system is engineered and commercialized, with leaked documents showing capabilities for intercepting unencrypted HTTP sessions. Researchers caution against downloading or examining the leaked archive without proper precautions like using air-gapped VMs or sandboxed environments.