Rome, Italy, May 15th, 2026, CyberNewswire
RaccoonLine today released a comprehensive technical analysis on the current state of internet censorship in China, following a significant September 2025 update to the country’s Deep Packet Inspection (DPI) infrastructure. The report reveals that the Great Firewall (GFW) has achieved an 80% detection rate for previously resilient protocols like VMess by identifying specific packet timing characteristics.
How the Great Firewall Blocks VPNs in 2026
The Great Firewall uses deep packet inspection at scale across all major Chinese internet exchange points. The system uses machine learning models trained on large traffic datasets to identify VPN patterns. OpenVPN has been blocked since the early 2010s. WireGuard followed as it became widespread. In 2025, VMess, a protocol developed specifically for censorship resistance, was broken after DPI systems identified its packet timing characteristics. Detection rate reached 80 percent within weeks.
The GFW also runs active probing. When a suspicious connection is detected, the system probes the destination server to determine whether it is a proxy. Standard VPN servers respond to active probes in ways that confirm their function and get the server IP added to the blocklist. A new VPN server in most configurations gets blocked within hours of going live.
Protocols Reported as Effective in China
VLESS with REALITY transport is currently the protocol that operators and researchers report as consistently surviving in China. The REALITY component borrows the TLS certificate of a real, widely-visited website. When the GFW’s active probing system queries the server, it receives the same response as the legitimate site would give. There is nothing to fingerprint.
VLESS traffic itself contains no distinctive overhead pattern. From the perspective of a DPI system, the traffic looks like HTTPS to a popular website. Correct configuration matters: VLESS servers need TLS transport, an appropriate front domain for REALITY, and CDN integration to handle IP-based blocking.
Decentralized Routing and Endpoint Rotation
Even a correctly configured VLESS server on a fixed IP accumulates behavioral signals over time. The same IP appears in connection logs across multiple users. Traffic volume patterns become associated with that IP. Eventually the IP gets flagged and blocked.
A decentralized VPN with Wandering Flow routing addresses this by cycling connections through different P2P nodes rather than maintaining a fixed server endpoint. There is no single IP to flag. P2P residential node IPs contribute further: data center IP ranges are among the first entries on GFW blocklists, while residential IPs look like ordinary internet users.
Practical Considerations for Users in China
VPN use in China occupies a legal grey area. Enforcement against individual users is inconsistent. Users should be aware of the legal context and make their own assessment of risk.
Setup before arrival is strongly recommended. App stores available inside China do not carry most VPN applications. Speed expectations should be calibrated: VLESS connections in China will generally be slower than WireGuard on an unrestricted network. A slower connection that works is more useful than a faster one that is blocked. The full product guide is available at raccoonline.com.
About RaccoonLine
RaccoonLine is built for the Chinese censorship environment: VLESS protocol survives Great Firewall DPI, Wandering Flow routing prevents fixed-endpoint behavioral flagging, and residential P2P node IPs avoid range-based blocking. The product includes built-in decentralized file storage and clients for Windows, macOS, iOS, and Android. More information is available at raccoonline.com.