Hey everyone! Here are our meeting logs: https://meetbot.debian.net/tor-meeting/2026/tor-meeting.2026-03-12-16.00.log... And our meeting pad: Anti-censorship -------------------------------- Next meeting: Thursday, March 19 16:00 UTC Facilitator: cohosh ^^^(See Facilitator Queue at tail) Weekly meetings, every Thursday at 16:00 UTC, in #tor-meeting at OFTC (channel is logged while meetings are in progress) This week's Facilitator: meskio == Goal of this meeting == Weekly check-in about the status of anti-censorship work at Tor. Coordinate collaboration between people/teams on anti-censorship at the Tor Project and Tor community. == Links to Useful documents == * Our anti-censorship roadmap: * Roadmap:https://gitlab.torproject.org/groups/tpo/anti-censorship/-/boards * The anti-censorship team's wiki page: * https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/home * Past meeting notes can be found at: * https://lists.torproject.org/pipermail/tor-project/ * Tickets that need reviews: from projects, we are working on: * All needs review tickets: * https://gitlab.torproject.org/groups/tpo/anti-censorship/-/merge_requests?sc... * Project 158 <-- meskio working on it * https://gitlab.torproject.org/groups/tpo/anti-censorship/-/issues/?label_nam... == Announcements == * We can bump the min Go version in snowflake and lyrebird to 1.25 if needed * https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/issues/41... == Discussion == * should we start collecting webtunnel bridges for the missing pools (email and restricted) * https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/298 * let's start assigning bridges to the remaining pools and enable email once we have enough * meskio will do the config change * New stun servers being added, any policy issue with these servers? * https://gitlab.torproject.org/tpo/anti-censorship/rdsys-admin/-/merge_reques... * we don't see any issues with them * will apply them first to circumvention settings and after to the builtin bridges == Actions == * == Interesting links == https://tailscale.com/blog/how-nat-traversal-works <- nice write up about challages about NAT types, for someone look to learn more about NAT dramas (no discussion necessary) == Reading group == * We will discuss "" on * * Questions to ask and goals to have: * What aspects of the paper are questionable? * Are there immediate actions we can take based on this work? * Are there long-term actions we can take based on this work? * * Is there future work that we want to call out in hopes that others will pick it up? * Next in the Reading Group Queue: * == Updates == Name: This week: - What you worked on this week. Next week: - What you are planning to work on next week. Help with: - Something you need help with. cecylia (cohosh): 2026-03-12 Last week: - opened a MR in tor-browser-build for legacy go1.22 support for macos - https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/merge_req... - released version 2.12.1 of snowflake - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - discussed stun server testing and updates with shell - discussed cc algorithms with lanius_collaris and opened issue about it - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - gave feedback on snowflake simulations for proxy fairness proposal Next week: - continue snowflake and lyrebird go version support and release work - follow up about running shadow simulations for snowflake performance - research snowflake enumeration attacks (snowflake#40396) - implement proxy fairness proposal - follow up on snowflake rendezvous failures (snowflake#40447) - revisit conjure integration with lyrebird - take a look at potential snowflake orbot bug - https://github.com/guardianproject/orbot-android/issues/1183 dcf: 2026-03-05 Last week: - reviewed on a "??" geoip fix in snowflake proxy https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - made an issue for OS upgrade on snowflake-02, necessary before being able to updgrade tor https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - wrote up a research idea for using rateless erasure codes for rendezvous https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Research-idea... - posted a short tutorial on using ooni-sync to download OONI measurements https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - reviewed an MR to enable disable stats reporting in the snowflake standalone proxy https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... Next week: - upgrade OS on the snowflake-02 bridge https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - open issue to have snowflake-client log whenever KCPInErrors is nonzero https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - parent: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... Help with: meskio: 2026-03-12 Last week: - debug tails issue with meek, was python upstream library issue (lyrebird#40034) - try out gitlab SAST in lyrebird, doesn't produce much output (is that good?) - grant writting Next week: - AFK Shelikhoo: 2026-03-12 Last Week: - [Testing] Unreliable+unordered WebRTC data channel transport for Snowflake rev2 (cont.)( https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... ) testing environment setup/research - Merge request Reviews - Vantage point maintaince - [Research] proxy pool overload and potential blocking in Iran ( https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... ) - [Research] Add three NAT type buckets to the snowflake broker ( https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... ) - [MR] Replace broken stun server with working one ( https://gitlab.torproject.org/tpo/anti-censorship/rdsys-admin/-/merge_reques... ) - [Research] Add More Stun Servers to Snowflake https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... Next (working) Week/TODO: - Merge request reviews - [Deployment]Unreliable+unordered WebRTC data channel transport for Snowflake rev2 (cont.)( https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... ) Building custom Tor Browser with patch applied - Vantage point maintaince - [Research] proxy pool overload and potential blocking in Iran ( https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... ) - [Research] Add three NAT type buckets to the snowflake broker ( https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... ) onyinyang: 2026-02-26 Last week(s): - attended FOCI - Working on https distributor language selector https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/196 Next week: - Away until March 18 - Continue work on rdsys#196 - Continue Investigating rdsys#248 i.e., why dysfunctional webtunnel bridges are being distributed - Troubleshooting conjure not connecting in China - waiting for more information from conjure authors/maintainers Switch back to some of these: As time allows: - Lox still seems to be filling up the disk on the rdsys-test server despite changes made to delete old entries, look into what's going wrong Blog post for conjure: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/conju... - review Tor browser Lox integration https://gitlab.torproject.org/tpo/applications/tor-browser/-/merge_requests/... - add TTL cache to lox MR for duplicate responses: https://gitlab.torproject.org/tpo/anti-censorship/lox/-/merge_requests/305 - Work on outstanding milestone issues: - key rotation automation Later: pending decision on abandoning lox wasm in favour of some kind of FFI? https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/43096): - add pref to handle timing for pubkey checks in Tor browser - add trusted invitation logic to tor browser integration: https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/42974 - improve metrics collection/think about how to show Lox is working/valuable - sketch out Lox blog post/usage notes for forum (long term things were discussed at the meeting!): - brainstorming grouping strategies for Lox buckets (of bridges) and gathering context on how types of bridges are distributed/use in practice Question: What makes a bridge usable for a given user, and how can we encode that to best ensure we're getting the most appropriate resources to people? 1. Are there some obvious grouping strategies that we can already consider? e.g., by PT, by bandwidth (lower bandwidth bridges sacrificed to open-invitation buckets?), by locale (to be matched with a requesting user's geoip or something?) 2. Does it make sense to group 3 bridges/bucket, so trusted users have access to 3 bridges (and untrusted users have access to 1)? More? Less? theodorsm: 2026-02-19 Last weeks: - Bumping pion stack version with backport: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - Implementing DTLS 1.3 in pion Next weeks: - Implementing DTLS 1.3 in pion Help with: - Facilitator Queue: cohosh onyinyang shelikhoo meskio 1. First available staff in the Facilitator Queue will be the facilitator for the meeting 2. After facilitating the meeting, the facilitator will be moved to the tail of the queue -- meskio | https://meskio.net/ -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- My contact info: https://meskio.net/crypto.txt -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Nos vamos a Croatan.