Hey everyone!

Here are our meeting logs: http://meetbot.debian.net/tor-meeting/2023/tor-meeting.2023-02-02-15.58.html

And our meeting pad:

Anti-censorship team meeting pad --------------------------------

Next meeting: Thursday, February 9 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 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 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 * Sponsor 139 <-- hackerncoder, irl, joydeep, meskio, emmapeel working on it * https://pad.riseup.net/p/sponsor139-meeting-pad

== Announcements == *

== Discussion ==

* is there any proposal to encode bridges into human-memorable form? like a list of words? * people have trouble pasting in the bridge lines (fail to get the entire line for example), and support wants either: * something that is easier to copy and paste, or * and easy way to verify that the line was pasted correctly (visual checksum or similar) * bridgemoji are meant to serve this role * gus will open an issue for user research of different options (QR code, sequence of words, others)

* snowflake fallback from domain fronting to amp cache, how/whether/when/etc to implement (https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...) * arma is going to check how hard would be to change c-tor to only connect to two bridges instead of all of them at once. So maybe we can duplicate bridges with domain fronting and amp cache. There is a patch which implements this idea: https://gitlab.torproject.org/tpo/core/tor/-/issues/40578 But see also the caveats on https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... * we need to check the consecquences of using amp cache, and if we are ok having half of our users using it * Three possible options: * multiple bridge lines with different configurations, having multiple bridges with different fingerprint or fixing tor to allow multipe bridgelines with one fingerprint * different definitions in TB for domain-front and amp-cache so users can pick * snowflake client does control the fallback, maybe by passing flags with what to fall back to

* use ampcache for snowflake in IR? * https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/115 * https://gitlab.torproject.org/tpo/anti-censorship/rdsys-admin/-/merge_reques... * our domain front for both snowflake and circumvention settings was blocked in Iran for 9 days

* Packet loss resulted in performance issue for snowflake in China * https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... * snowflake fails to bootstrap in the vantage point due to packet lost * shellikhoo is investigating it * (from ahf): do we have an idea about how many C tor modifications that needs to be reviewed before s28 is wrapped up? Purely so we can plan this for take-in.

for next week: * Conjure is in nightly versions of Tor Browser now, an update on how it's going and the roll out plan

== Actions ==

* We should make a ticket for pion to cache its stun answers when possible, because right now it surprises us by asking way more stun questions than it actually needs to. * We might want to be able to spin up our own stun servers, on our own ip/port, for debugging. We should talk to TPA about that goal at some point (not urgent). * Roger will look more at https://gitlab.torproject.org/tpo/core/tor/-/issues/40578 ("only contact the first few working bridges on your bridge list") and plan to have a sense of whether it will be an easy hack or a hard one, for next week.

== Interesting links ==

* https://en.wikipedia.org/wiki/Snowflake_(software)

== 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 2023-02-02 Last week: - found and fixed bug in rdsys where pruned resources weren't propagating (rdsys#151) - finished writing a rust library for rdsys backend distributors https://gitlab.torproject.org/cohosh/rdsys-backend-api - wrote up Jack's documentation for the wireguard setup between stations and bridge in Gitlab https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/conju... - partially debugged issue with conjure hanging from some stations (conjure#22) - reviewed snowflake!35 - FOCI workshop prep This week: - FOCI workshop prep - debug potential issue with some stations hanging (conjure#22) - debug wireguard setup (conjure#15) - detect and recover from conjure hangs better (conjure#23) - more work on lox integration Needs help with:

dcf: 2023-02-02 Last week: - recast the Snowflake fundraising 2022 update into a form for the Tor blog https://gitlab.torproject.org/tpo/web/blog/-/merge_requests/154 - documented the roughly one-week blocking of cdn.sstatic.net in Iran https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/115 Next week: - migrate goptlib to gitlab https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/86#note_2823... - try Conjure PT development version https://forum.torproject.net/t/tor-dev-introducing-a-conjure-pt-for-tor/4429 Help with:

meskio: 2023-02-02 Last week: - clean up gettor locale support code - distribute android apk's in gettor (rdsys#42) - use the new tor browser pt_config.json builtin bridges in moat (rdsys#146) - give support to bridgesanner (rdsys#143) - review rdsys fix to pruned resources bug (rdsys!70) - review whatsapp gettor integration (rdsys!69) Next week: - support internationalization in rdsys (rdsys#11)

Shelikhoo: 2023-02-02 Last Week: - [Merge Request Awaiting] Add SOCKS5 forward proxy support to snowflake (snowflake!64) - [Discussion & Deployment] Rollout of Distributed Snowflake Support - [Coding & Deployment] Proposal: Centralized Probe Result Collector (anti-censorship/team#54) - [Research] HTTPT Planning https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/httpt... - [Merge Request Done] Automated Container Image Building in Continuous integration (https://gitlab.torproject.org/tpo/anti-censorship/connectivity-measurement/p...) - research snowflake's performance issue in China(https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...) - push the chunked upload raw data upload change to vantage points Next Week: - [Research] WebTunnel planning (Continue) - Have a download link for raw vantage point packet capture files

Itchy Onion: 2023-1-26 Last week: - Investigate whether stun over TLS is beneficial to us (issues#40240) - Looking at options for standalone proxy runners to specify an interface (issue#40108) This week: - Lunar New Year break - Continue working on issue #40108 (standalone proxy bind specific IP) - Review MRs

hackerncoder: 2023-02-02 last week: Next week: - getting ooni-exporter to work with torsf (snowflake) - work on monitoring bridges health - work on "bridgetester"? - setting up snowflakes?

cece: 2022-12-22 This week: - working on creating a dummy WhatsApp bot Next week: - My bot is not yet working as expected s still trying to figure that out Help with: - resources