Hey everyone!

Here are our meeting logs:

http://meetbot.debian.net/tor-meeting/2022/tor-meeting.2022-04-21-15.59.html

And our meeting pad:

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

Next meeting: Thursday April 21th 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 checkin 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 ==

* Do we have graphs about telegram bridge usage * irl has some script to generate them * current telegram bridges are not pressent in metrics.tpo as 'distributor telegram', as they are manually feeded. This will change when we start using rdsys for it. * Is the reading group reading supposed to be "Web censorship measurements of HTTP/3 over QUIC" https://dl.acm.org/doi/abs/10.1145/3487552.3487836 ? * or the threads https://github.com/net4people/bbs/issues/108 https://ntc.party/t/http-3-quic/1823 ? * one of the authors of the paper, Kathrin Elmenhorst, has posted some more recent measurements of HTTP/3 blocking in Russia specifically https://github.com/kelmenhorst/quic-censorship/issues/4 * we'll read the paper, the threads are for more context * Snowflake Multi-Server Broker Testing (https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...) * (this is where the client tells the broker&proxy what bridge it wants to use, by putting fingerprint=1234ABCD... on its Bridge line) * testing is wellcome... * there are instructions for testing it in the issue * Report of CDN Block in Turkmenistan(https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/issu...) * cloudflare is being blocked in Turkmenistan * in Russia they are blocking 2 IPs of cloudflare too, but might be an error of overblocking targeting a single site https://ntc.party/t/cloudflare-cdn/2245/24 * shell will talk with fastly and cloudflare to see what they know, and we'll look into setting up a vantage point in TM * meskio, if you could give rdsys a free software license, i will breathe easier at night: https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/107 * meskio will add 3-BSD in the comming days * dnstt, next steps * https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/trac/... * the major blocker now is to have support for PT commands over the SOCKS connection * will require forking the code into tpo

== Actions ==

*

== Interesting links ==

* https://pluggabletransports.info/blog/pt-meetup-apr2022/

== Reading group ==

* We will discuss "Blocking of HTTP/3 (QUIC) in Russia" on Apr/28th/2022 * https://dl.acm.org/doi/abs/10.1145/3487552.3487836 * https://github.com/net4people/bbs/issues/108 * 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.

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...

cecylia (cohosh): last updated 2022-04-14 Last week: - moved tor-specific snowflake code out of client library (snowflake#40124) - merge request: snowflake!85 - bump version of webrtc dependency (snowflake#40127) - merge request: snowflake!86 - commented on snowflake web workflow (snowflake#40125) - opened issue to bump version of snowflake and webrtc in tor browser (tor-browser-build#40474) - work on conjure test environment setup This week: - continued work on conjure PT - continue snowflake maintenance tasks Needs help with:

dcf: 2022-04-21 Last week: - investigated how Tor Metrics estimates the number of users and asked questions about it https://lists.torproject.org/pipermail/tor-dev/2022-April/014724.html https://gitlab.torproject.org/tpo/network-health/metrics/website/-/issues/40... - made a graph of Tor users in Russia across all transports https://gitlab.torproject.org/tpo/community/support/-/issues/40050#note_2796... - wrote feedback on the Def Con submission draft - installed a second snowflake bridge https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... Next week: - look at STATUS VERSION proposal https://gitlab.torproject.org/tpo/core/torspec/-/merge_requests/63 Help with:

agix: 2021-02-10 Last week: - Continued work on gettor-twitter Next week: - Hopefully finish the task 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: -

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

meskio: 2022-04-21 Last week: - deploy rdsys 0.2 with many fixes - update monit configuration to the new snowflake bridge (monit-configuration!2) - merge moat documentation into rdsys (rdsys!34) - catch up after a week off Next week: - use bridgestrap results to select what bridges to distribute (rdsys#96) - give rdsys a free software license (rdsys#107)

Shelikhoo: 2022-04-21 Last Week: - [Merge Request Awaiting] Add SOCKS5 forward proxy support to snowflake (snowflake!64) - [Coding & Deployment] Proposal: Centralized Probe Result Collector (anti-censorship/team#54) - [Discussion] Centralized Probe Log Collection Ascension Request - [Discussion] Hosting Centralized Probe Log Collection Server on TPA managed VPS - [Discussion] Proposal: Support for Dynamic IP obfs4 bridges with unattended proxy information update(aka "Subscription") - [Discussion+Coding] Support Automatic Bridge Info update(shelikhoo/LogCollectorAncillary#1) - [Discussion+Coding] Remove Inactive Bridge from Test Result(shelikhoo/LogCollectorAncillary#2) - [Coding] Distributed Snowflake Bridges - Broker - [Coding] Distributed Snowflake Bridges Testing Environment - Dockerlized - [Deployment] Distributed Snowflake Bridges Testing Broker Next Week: - [Coding] Distributed Snowflake Bridges (continue) - [Research] Blocking of Snowflake in Turkmenistan, 2021-10-24

Itchy Onion: 2022-04-14 Last week: - worked on rebasing RACECAR snowflake but didn't finish (3 day week) - read RACECAR doc This week: - debugged a RACE 2.1.0 issue - read snowflake code -- there is going to be a recurring 1:1 meeting between me and Eliana from Georgetown to go over each other's channel code

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

hanneloresx: 2021-3-4 Last week: - Submitted MR for bridgestrap issue #14 Next week: - Finish bridgestrap #14 - Find new issue to work on Help with: -