Hey everyone!

Here are our meeting logs: http://meetbot.debian.net/tor-meeting/2024/tor-meeting.2024-01-11-15.57.html

And our meeting pad: cohosh

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

Next meeting: Thursday, January 18 16:00 UTC Facilitator:

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: shelikhoo

== 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 96 <-- meskio, shell, onyinyang, cohosh             * https://gitlab.torproject.org/groups/tpo/-/milestones/24         * Sponsor 150 <-- meskio working on it             * https://gitlab.torproject.org/groups/tpo/anti-censorship/-/issues/?label_nam...

== Announcements ==

* Since December 2023, getting TLS certificates for subdomains of torproject.net (e.g. snowflake-broker.torproject.net) requires asking the sysadmin team to create a CAA record in DNS to authorize a specific account.         * https://gitlab.torproject.org/tpo/tpa/team/-/issues/41462         * https://gitlab.torproject.org/tpo/tpa/team/-/wikis/howto/tls?version_id=41c7...

== Discussion ==

* DTLS anti-fingerprinting library similar to uTLS         * Useful for snowflake: https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...         * Sean DuBois (from pion) has been interested in this and may have ideas on what this library could look like

== Actions ==

== Interesting links ==

* https://opencollective.com/censorship-circumvention/projects/snowflake-daily...

== 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): 2024-01-11     Past weeks:         - Lox + Tor Browser integration             - https://gitlab.torproject.org/tpo/anti-censorship/team/-/issues/116         - worked on Lox distributor bug fixes and testing         - spun up a few temporary Lox bridges for testing         - integration testing of Snowflake with Shadow             - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...             - proxy command-line option to specify probe server URL                 - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...             - SetNet fix for probetest                 - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...             - probetest command-line option to specify STUN URL                 - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...         - opened shadow issue to deal with missing setsockopt support for snowflake             - https://github.com/shadow/shadow/issues/3278         - unit testing feedback on SQS rendezvous MR             - https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...     This week:         - Lox + Tor Browser integration         - figure out what we need to get the snowflake server running in shadow again         - rebase and try out manifest v3 patch         - Conjure bridge maintenance     Needs help with:

dcf: 2024-01-11     Last week:         - upgraded snowflake bridges to 0.4.8.10 https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...         - figured out a CAA issue to prevented renewing TLS certificates for torproject.net domains (e.g. snowflake.torproject.net, snowflake-broker.torproject.net) https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...         - opened an issue to let the snowflake bridge and broker use a newer type of ACME challenge https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...         - documented WireGuard setup for the snowflake-01 bridge https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Survival-Guid...         - azure CDN bookkeeping https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Snowflake-cos...     Next week:         - review draft MR for unreliable data channels 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...         - open issue to disable /debug endpoint on snowflake broker     Before EOY 2023:         - move snowflake-02 to new VM Help with:

meskio: 2023-12-21     Last week:         - grant writing     Next week:

Shelikhoo: 2024-01-11     Last Week:                 - Work on snowflake performance improvement (WIP): https://gitlab.torproject.org/shelikhoo/snowflake/-/tree/dev-udp-performance... https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...                 - HTTPS distributors in rdsys: https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/191                 - Merge request reviews     Next Week/TODO:

onyinyang: 2023-01-11     Last week(s):         - Finished Telegram bot dev         - Continue to support Lox wasm stubs as needed         - Holiday!

This week:         - Bug fixing and other things that come up as lox integration is rolled out         - document API for lox client/server requests         - Other Lox bug fixes/improvements         - attempt hyper upgrade again

(long term things were discussed at the meeting!): https://pad.riseup.net/p/tor-ac-community-azaleas-room-keep                     - 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?