A Wall Behind A Wall : In Fujian

BitTorrent (qBittorrent) experiences asymmetric throttling in Fuzhou: connections to peers in Russia are severely impaired while connections to peers within mainland China remain normal, indicating selective cross-border flow throttling rather than protocol-level blocking.

Issue body deployment throttlingip-blocking cn

DNS over HTTPS provided by both NextDNS and Cloudflare DNS (1.1.1.1) has become completely unusable in Fuzhou when accessed via Firefox, with one isolated unreproducible exception for Cloudflare DNS.

Issue body deployment dns-poisoningip-blocking cn

There is evidence that ISPs in Fujian (and neighboring Zhejiang) are deploying DPI plugins directly on ISP-provided integrated optical modem-routers used in home installations, extending inspection to the residential access layer rather than only upstream backbone choke points.

Issue body detection dpi cn

As of August 2026 in Fuzhou, Fujian, most censorship-resistant service providers are non-functional; a small number of providers using v2ray remain partially functional, while Tor Browser bridges and Snowflake are no longer usable.

Issue body deployment dpiactive-probingtraffic-shape cn