Hey everyone!

Here are our meeting logs:

http://meetbot.debian.net/tor-meeting/2022/tor-meeting.2022-05-19-15.59.html

And our meeting pad:

Anti-censorship work meeting pad --------------------------------

Next meeting: Thursday May 26th 16:00 UTC

Weekly meetings, every Thursday at 16:00 UTC, in #tor-meeting at OFTC (channel is logged while meetings are in progress)

== 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 Tor.

== 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 sponsors we are working on: * All needs review tickets: https://gitlab.torproject.org/groups/tpo/anti-censorship/-/merge_requests?sc... * Sponsor 28 * must-do tickets: https://gitlab.torproject.org/groups/tpo/-/milestones/10 * possible tickets: https://gitlab.torproject.org/groups/tpo/-/issues?scope=all&utf8=%E2%9C%... * Sponsor 96 * https://gitlab.torproject.org/groups/tpo/-/milestones/24

== Announcements ==

== Discussion ==

* Snowflake doesn't work in Russia (connection failure by timeout) * https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/issu... * https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... * https://ntc.party/t/a-new-snowflake-blocking-rule-offset-of-supported-groups... * the new reported blocking rule, with a different offset to supported_groups than what we diagnosed in December 2021 (https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...) is real * however Snowflake still works in Russia, apparently * Is there a tool to do automated bisection of packet contents and discover such blocking rules? * OONI once had a module called daphn3 * https://github.com/OpenObservatory/ooniprobe-debian/blob/master/ooni/kit/dap... * https://speakerdeck.com/hellais/ooni-and-daphn3 * Also Geneva could work for this purpose https://geneva.cs.umd.edu/ * polyanthum got upgraded to bullseye * everything is working except for bridgestrap metrics * Any anti-censorship stands/activities at MCH2022 (https://mch2022.org/)?

== Actions ==

== Interesting links ==

== 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?

== 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): last updated 2022-05-19 Last week: - finished setting up networked VMs for conjure development - reviewed some snowflake MRs - emailed conjure people about weird license for required kernel module This week: - continue work on conjure PT - continue snowflake maintenance tasks Needs help with:

dcf: 2022-05-19 Last week: - posted a chart of estimated daily unique Snowflake users https://gitlab.torproject.org/tpo/network-health/metrics/analysis/-/issues/4... - helped investigate a reported DTLS blocking rule in Russia https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/issu... https://ntc.party/t/a-new-snowflake-blocking-rule-offset-of-supported-groups... https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... - snowflake CDN bookkeeping https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Snowflake-cos... - analyzed OONI stunreachability measurements from Russia https://lists.torproject.org/pipermail/anti-censorship-team/2022-May/000237.... Next week: - look at STATUS VERSION proposal https://gitlab.torproject.org/tpo/core/torspec/-/merge_requests/63 - set up access control on the snowflake-02 bridge https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... Help with:

arlolra: 2022-04-07 Last week: - Merged the rest of snowflake !81 Next week: - Get to snowflake-webext #10 Evergreen: - Figure out where in pion/webrtc ALPN should be configured and used - Maybe add Chacha20Poly1305 to pion/dtls https://github.com/pion/dtls#planned-features https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... Help with: -

meskio: 2022-05-19 Last week: - add a delay to BridgeDB reconnections to rdsys backend (bridgedb!40) - release a new version of snowflake-proxy and obfs4-bridge docker images for multiple archs - fix issues after polyanthum upgrade to bullseye Next week: - rethink distributor retries to the rdsys backend (rdsys#99) - use systemd to run bridgedb (team#72)

Shelikhoo: 2022-05-19 Last Week: - [Merge Request] Add Distributed Snowflake Server Support (snowflake!87) - [Merge Request Awaiting] Add SOCKS5 forward proxy support to snowflake (snowflake!64) - [Research & Coding] WebSocket + CDN Based Probe Control Connection Forwarder (shelikhoo/LogCollectorAncillary#3) - [Coding & Deployment] Proposal: Centralized Probe Result Collector (anti-censorship/team#54) - [Discussion & Deployment] Migrating Controling git repo to Tor Gitlab Instance (shelikhoo/LogCollectorAncillary#5) <- awaiting/blocked Next Week: - [Coding] Distributed Snowflake Bridges (continue) - [Coding] Distributed Snowflake Bridges (Javascript ver.) - [Merge Request] Add Distributed Snowflake Server Support (snowflake!87) - [Coding & Deployment] Proposal: Centralized Probe Result Collector (anti-censorship/team#54) - [Research & Coding] WebSocket + CDN Based Probe Control Connection Forwarder (shelikhoo/LogCollectorAncillary#3) - [Research & Coding] Implement metrics to measure snowflake churn (https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...)

Itchy Onion: 2022-05-12 Last week: - audit s28 PI meeting - work on the snowflake issues assigned to me (!84, !88) - review MRs assigned to me This week: - work on the snowflake issues assigned to me - review MRs assigned to me - work on s28 issue 81

anadahz: 2022-01-27 Last week: - Increase timeout check cycles for default-bridge-felix-1 and default-bridge-felix-2 as they have been generating too many alerts: https://gitlab.torproject.org/tpo/anti-censorship/monit-configuration/-/merg...

HackerNCoder: 2021-12-16 This week: Last/done: Setup web mirror on tor.encryptionin.space Next: Get (new VPs with) new IP and setup new web mirror on new domain

maxb: 2021-09-23 Last week: - Worked on https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... re: utls for broker negotiation - Had conversation with someone about upstream utls http round tripper https://github.com/refraction-networking/utls/pull/74 - Too busy with work :/ Next week: - _Really_ want to get a PR for utls round tripper