[tor-project] Anti-censorship team meeting notes, 2022-04-21

Hey everyone!

Here are our meeting logs:


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: Development · Boards · Anti-censorship · GitLab
  * The anti-censorship team's wiki page:
    * Home · Wiki · The Tor Project / Anti-censorship / Team · GitLab
  * Past meeting notes can be found at:
    * The tor-project Archives
  * Tickets that need reviews: from sponsors we are working on:
    * All needs review tickets: Merge requests · Anti-censorship · GitLab
    * Sponsor 28
      * must-do tickets: Sponsor 28: Reliable Anonymous Communication Evading Censors and Repressors (RACECAR) · The Tor Project · GitLab
      * possible tickets: Issues · The Tor Project · GitLab
    * Sponsor 96
      * Sponsor 96: Rapid Expansion of Access to the Uncensored Internet through Tor in China, Hong Kong, & Tibet · The Tor Project · GitLab

== 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 Blocking of HTTP/3 (QUIC) in Russia · Issue #108 · net4people/bbs · GitHub Ограничение HTTP/3 (QUIC) - Russia - NTC ?
    * one of the authors of the paper, Kathrin Elmenhorst, has posted some more recent measurements of HTTP/3 blocking in Russia specifically Broad blocking of HTTP/3 traffic in Russia (AS31213, AS12389) · Issue #4 · kelmenhorst/quic-censorship · GitHub
    * we'll read the paper, the threads are for more context
  * Snowflake Multi-Server Broker Testing (Distributed Snowflake Server Support (#40129) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab)
    * (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(Blocking of Snowflake in Turkmenistan, 2021-10-24 (#40024) · Issues · The Tor Project / Anti-censorship / censorship-analysis · GitLab)
    * 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 Не открываются некоторые сайты за Cloudflare CDN - #24 by User69 - Russia - NTC
    * 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: rdsys needs a free software license (#107) · Issues · The Tor Project / Anti-censorship / rdsys · GitLab
    * meskio will add 3-BSD in the comming days
  * dnstt, next steps
    * Add support for dnstt (#40001) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / pluggable transports · GitLab
    * 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 ==

  * Pluggable Transports April 2022 Meetup - Pluggable Transports

== 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
    * Blocking of HTTP/3 (QUIC) in Russia · Issue #108 · net4people/bbs · GitHub
    * 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 ==

    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: Increase number of cycles for felix bridges (!1) · Merge requests · The Tor Project / Anti-censorship / monit-configuration · GitLab

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 [tor-dev] Metrics: Estimating fraction of reported directory-request statistics userstats-bridge-country graph is undercounting users (#40047) · Issues · The Tor Project / Network Health / Metrics / Website · GitLab
    - made a graph of Tor users in Russia across all transports [Russia] Some ISPs are blocking Tor (#40050) · Issues · The Tor Project / Community / Support · GitLab
    - wrote feedback on the Def Con submission draft
    - installed a second snowflake bridge Set up a second snowflake bridge site (#40122) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
  Next week:
    - look at STATUS VERSION proposal Add STATUS VERSION message for PT protcol (!63) · Merge requests · The Tor Project / Core / Tor Specifications · GitLab
  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
    - Figure out where in pion/webrtc ALPN should be configured and used
    - Maybe add Chacha20Poly1305 to pion/dtls
    GitHub - pion/dtls: DTLS 1.2 Server/Client implementation for Go
    Make Snowflake's DTLS fingerprint more similar to popular WebRTC implementations (#40014) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
  Help with:

maxb: 2021-09-23
  Last week:
    - Worked on uTLS for broker negotiation (#40054) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab re: utls for broker negotiation
    - Had conversation with someone about upstream utls http round tripper feat: sketch out utls http.RoundTripper by bassosimone · Pull Request #74 · refraction-networking/utls · GitHub
    - Too busy with work :confused:
  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:
        Setup web mirror on tor.encryptionin.space
        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:

meskio | https://meskio.net/
My contact info: https://meskio.net/crypto.txt
Nos vamos a Croatan.