A dial-testing ('拨测') log documents systematic active-probing/reachability testing from a 'YGN-GTG' (Yangon Gateway, Myanmar) network node against six overseas test sites in Singapore, France, the US, New Zealand, South Africa, and Chile, using packet capture plus flow statistics to quantify one-way vs two-way flow completion (0-45%% flow loss observed per site) through gateway node IPs 'YGN-GTG: 10.173.12.x' -- direct empirical evidence of connectivity/blocking-effectiveness QA testing tied to the Myanmar (M22) Yangon deployment, run against an 'NCSC'-provided 'Campana' test WiFi network.
连接NCSC提供的Campana拨测Wifi,进行测试 一共访问100次,捕包的结果和statistics结果为存在单向流,单向流47条,双向流17条,丢失流量36条,且C2S均走的YGN-GTG: 10.173.12.1,S2C均走的YGN-GTG: 10.173.12.1
Defense implications
- The operator directly measures flow-completion rates against arbitrary overseas domains from the Myanmar gateway node as routine QA, and treats 30-45%% one-way flow loss as within normal/acceptable range for the link -- design circumvention protocols to be robust to partial/asymmetric flow loss rather than assuming binary block/no-block outcomes are how the operator itself judges success.
Related findings
Under the internal "M22" project (deployment site "YGN-MYTEL" confirms this is Myanmar, at the Mytel carrier), Geedge runs a continuous, individually-tracked signature-extraction pipeline against named commercial VPN apps (Super Unlimited VPN, NotVPN, Avira Phantom, Bitdefender VPN, Thunder VPN, Panda VPN, Mouse VPN, HaloVPN, GoFly VPN, Kiwi/Kuto/Greennet/Gulf Super/Hatunnel+ VPN, and a customer-provided list of 141 more): active probing of app refresh/connect behavior (including automated UI-driving scripts) extracts server IP/FQDN lists, separately for free vs. paid tiers and Android vs. iOS, which are then loaded as blocklist objects and validated against a false-positive ("CT"/穿透) test pass in a separate demo environment before deployment.
Project "M22" runs a standing weekly program to extract and patch detection signatures against "Turbo VPN": automated dial-testing continuously discovers server IPs (tens to hundreds/week), each batch packaged into a dated JSON patch file, validated for both blocking efficacy and false-positive risk before rollout. Ran continuously Aug-Nov 2024 in the source ticket.
The same M22 weekly-extraction program runs in parallel against "7VPN": automated dial-tests repeatedly found its free-tier nodes already non-functional/blocked across weekly checks Aug-Oct 2024, indicating sustained monitoring even absent a signature update.
M22 runs a large-scale automated pipeline against numerous commercial VPN apps: APK decompilation + HTTPS-proxy interception to extract servers/FQDNs, automated dial-testing at volume (one app: 17,554 dial-tests, 4,073 servers discovered, 94% 24-hour block rate), and OpenCV-based automated ad-dismissal to keep test automation running unattended.
An internal TSG functional-requirements spec ('加密协议JG') defines device support for identifying and blocking ECH, ESNI and QUIC traffic via per-connection SNI/region-matching tables (e.g. DF_QUIC_REGION), plus a companion 'FD报文全流程感知' feature that both passively monitors and actively injects synthetic verification traffic end-to-end through the network path to compute a live per-rule 'CT率' (breakthrough/penetration rate) — the system self-measures how often its own QUIC/ESNI/ECH blocks fail to take effect, and separately throttles logging/blocking detail for rule IDs receiving unusually high hit counts (DF_ATTACK_PROTECTION, 'targeted attack detection').
A 2020 MESA Lab monthly report describes building an encrypted-DNS gateway device and a self-hosted DoH server that was wired directly into a live "TSG platform WAN net interface", alongside a passive DoH-service-discovery pipeline that found 39 new DoH-serving domains in a single day of backbone ("科技网") traffic; a related note documents actively probing known DoH-serving IPs' upstream resolvers via a proxy network across 196 countries to check which still function.