Geedge's internal documents show that capabilities developed for one national deployment are explicitly documented to 'trickle down' to all the company's global clients—for example, Psiphon-blocking logic developed for Myanmar was tested for Ethiopia, though not yet fully deployed there as of the leak date. This vendor-mediated capability diffusion accelerates censorship sophistication across all client states simultaneously. The same model was framed at a July 2024 Urumqi meeting as a 'long-term struggle and technical confrontation', with anti-circumvention features developed for Xinjiang slated to roll out to Geedge clients globally.

Geedge co-founder Fang Binxing—named 'father of the Great Firewall' in company documents—explicitly linked Geedge's international expansion to China's Belt and Road Initiative in a 2024 speech, and a Geedge job advertisement sought candidates willing to travel to Pakistan, Malaysia, Bahrain, Algeria, and India. This confirms BRI as an institutional channel for GFW-derived censorship infrastructure export, not merely bilateral commercial deals.

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Internal Geedge documentation lists nine commercial VPNs as 'resolved,' providing staff with documented methods for identifying and filtering each protocol's traffic. The leak shows employees reverse-engineering popular circumvention tools to develop blocking signatures, consistent with GFW practices that have rendered most commercial VPNs inaccessible inside China.

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Following Myanmar's 2021 coup, Geedge developed a tool specifically to detect the server endpoints that Psiphon's app connects to, enabling nationwide blocking. OONI measurement data shows Psiphon access was 'highly limited' in Myanmar from June 2024 to March 2025—a roughly nine-month window of near-total suppression.

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After Sandvine exited Pakistan in 2023 under U.S. sanctions, Geedge stepped in to power Pakistan's Web Monitoring System (national firewall), reportedly utilizing existing Sandvine hardware alongside new Geedge technology. This demonstrates that Western vendor exits under sanctions pressure do not disrupt national filtering infrastructure — they create vacuums filled by Chinese GFW-derivative equivalents.

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A September 2025 leak of 100,000+ internal documents from Geedge Networks—co-founded by Great Firewall architect Fang Binxing—confirms export of GFW-derived Tiangou Secure Gateway (TSG) to Myanmar, Pakistan, Ethiopia, and Kazakhstan, providing those governments with DPI-based filtering, throttling, VPN blocking, and internet-blackout capabilities previously unavailable to them. Pakistan's deployment replaced Sandvine's Web Monitoring System infrastructure after Sandvine was sanctioned and exited in 2023, with Geedge apparently utilizing existing Sandvine hardware. Kazakhstan was the first client, from 2018, and Geedge claims more than 40 global service providers as clients under the Belt and Road Initiative framework.

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Despite Geedge's targeted Psiphon blocking in Myanmar (confirmed by OONI, June 2024–March 2025), Psiphon gained users during Myanmar's worst internet disruptions because all circumvention tools were simultaneously disrupted, with commercial VPNs collapsing first. Grant-funded tools with active anti-censorship investment (Psiphon, Tor) showed measurably greater resilience than commercial VPNs that do not invest in pluggable transport infrastructure.

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Amnesty International's 102-page investigation identifies a multi-vendor surveillance stack deployed in Pakistan: Chinese DPI (Geedge/MESA-derived), Canadian social-media monitoring (Netsweeper), and Emirati commercial spyware (Pegasus and FinFisher). The system enables deep packet inspection, SNI-based filtering, and traffic-shape classification at national scale, including targeted interception of encrypted messaging apps and VPN traffic.

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InterSecLab's 76-page analysis of the Geedge/MESA leak (based on nine months of indexing and translating >100,000 documents) characterizes the Tiangou Secure Gateway (TSG) product line as a commercially deployable detection stack that combines deep packet inspection, real-time mobile subscriber monitoring, active probing, ML-based traffic classifiers, and granular per-region rule sets. TSG is not a research prototype — leaked documentation includes deployment timelines and client government interactions for Kazakhstan, Ethiopia, Pakistan, Myanmar, and one unnamed country, with censorship rules explicitly tailored to each region.

2025-interseclab-internet-coup §3–§5 (InterSecLab report) dpiactive-probingml-classifiersni-blockingip-blockingtraffic-shapefully-encrypted-detect

Justice for Myanmar documents that Geedge Networks supplied Myanmar's military junta with GFW-derived surveillance and censorship infrastructure under Belt and Road frameworks following the February 2021 coup. The deployed system (Tiangou Secure Gateway / TSG) incorporates the same DPI, active-probing, and ML-classifier capabilities as the domestic Chinese GFW, giving Myanmar one of the most technically capable censorship systems in Southeast Asia.

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Relying on third-party email providers to verify users was demonstrated by Ling et al. to leave Tor's BridgeDB vulnerable to censors capable of creating multiple accounts, enabling bridge enumeration via sock-puppet attacks at scale. Active and passive detection techniques — including traffic flow analysis, DPI, website fingerprinting, and active probing — have been demonstrated in prior work to reveal Tor bridges, making Tor inaccessible for the majority of users in some regions.

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The paper presents a systematic taxonomy of blocking criteria across ISO/OSI layers: circumstance-based (addresses including sender/receiver/kind/physical location; timing including send time, receive time, duration, frequency; data-transfer properties; services including protocols, names, addresses) and content-based (file type/MIME, statistical detection of encrypted or compressed data, pattern matching for keywords or phrases, and website fingerprinting via request-count/byte-volume signatures).

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The June 2025 Iran shutdown—carried out during the Iran-Israel war beginning ~June 19—did not use BGP route withdrawals as in 2019. Instead, authorities applied service-level restrictions at the national border: DNS poisoning of foreign destinations, protocol whitelisting permitting only pre-approved domestic services, and DPI to block circumvention-tool traffic. Iran's international traffic fell roughly 90% while the country's BGP routes remained advertised, making the shutdown invisible to BGP-based monitoring systems. OONI measurement volume, which totalled 121,333 in June 2025, collapsed to under 200 submissions on June 19-20.

2025-iran-shutdown-measurement Executive Summary / §2 dpidns-poisoningport-blockingip-blocking