[tor-project] Anti-censorship team meeting notes, 2024-06-06

Shelikhoo shelikhoo at torproject.org
Thu Jun 6 18:02:12 UTC 2024


Hey everyone!

Here are our meeting logs:
http://meetbot.debian.net/tor-meeting/2024/tor-meeting.2024-06-06-16.00.html

And our meeting pad:

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

Next meeting: Thursday, June 13 16:00 UTC
Facilitator: onyinyang
^^^(See Facilitator Queue at tail)

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?scope=all&utf8=%E2%9C%93&state=opened&assignee_id=None
         * 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_name%5B%5D=Sponsor%20150


== Announcements ==

     *

== Discussion ==

     * can we retire monit in favor of prometheus?
         * 
https://gitlab.torproject.org/tpo/tpa/prometheus-alerts/-/merge_requests/41
         * 
https://gitlab.torproject.org/tpo/anti-censorship/monit-configuration/-/commits/main/?ref_type=HEADS
         * we agree it makes sense to retire the monit service
         * once the alerts are in place meskio will coordinate with 
philip to retire it
         * this work is making me notice that some builtin bridges are 
not reachable since a while, looks like the monit service was down
         * meskio will investigate the reachability of builtin bridges

     * do we wish to include snowflake into lyrebrid?
         * 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/lyrebird/-/issues/40015
         * cohosh will start that work with the integration of conjure 
into lyrebird
         * snowflake will have two challenges
             * lyrebird is keeping an old version of uTLS to maintain a 
go version supported by windows 7 (the plan is to drop that mid-september)
             * udp proxy support might be triky to do in lyrebird
         * we decide that we are ok with adding snowflake client support 
to lyrebird, but we'll need to see when and how complex will be
     * lyrebird supports a bunch of PTs that are deprecated (obfs2-3 and 
scramblesuit) should we remove those to gain space?
         * 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/lyrebird/-/issues/40016
         * once in a while there are reports of users still using those
         * meskio will explore if removing them will gain any space and 
if not will drop the idea

== Actions ==


== Interesting links ==

     * 
https://opencollective.com/censorship-circumvention/projects/snowflake-daily-operations/updates/2024-may-update

== 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): 2024-06-06
     Last week:
         - opened MR for lox db test fixup
             - 
https://gitlab.torproject.org/tpo/anti-censorship/lox/-/merge_requests/188
         - reviewed Lox MRs
         - onboarded onyinyang on how to do reproducible builds and 
update the Lox module in Tor Browser
     This week:
         - take a look at shell's mv3 changes
         - take a look at snowflake web and webext translations and best 
practices
         - make changes to Lox encrypted bridge table
             - 
https://gitlab.torproject.org/tpo/anti-censorship/lox/-/merge_requests/147
         - follow up on reported SQS errors
         - update wasm-bindgen fork to fix some bugs and hopefully 
upstream changes
     Needs help with:

dcf: 2024-06-06
     Last week:
     Next week:
         - review snowflake unreliable+unordered data channels rev2 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/315
         - open issue to have snowflake-client log whenever KCPInErrors 
is nonzero 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40262#note_2886018
             - parent: 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40267
         - open issue to disable /debug endpoint on snowflake broker
         - move snowflake-02 to new VM
Help with:
         - tell me when to restart the brokers for 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40349

meskio: 2023-06-06
     Last week:
         - use safeprom in rdsys (rdsys#203)
         - use safelog in rdsys
         - add prometheus metrics to replace bridgedb metrics in rdsys 
(rdsys#188)
         - add prometheus blackbox targets to replace monit targets 
(prometheus-alerts!41)
         - add webtunnel bridges to the settings distributor 
(rdsys-admin!31)
         - review lox key rotation MR (lox!183)
         - review STATUS version support in tor (tor!820)
     Next week:
         - create an rdsys requests metrics puller that produces metrics 
for collector (rdsys#188)


Shelikhoo: 2024-06-06
     Last Week:
         - [Merge Request Waiting] Add Container Image Mirroring from 
Tor Gitlab to Docker 
Hub(https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/280)
             - [Merge Request Waiting] Snowflake Performance Improvement 
rev2 
(https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/315)
             - Chrome Manifest V3 transition: 
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake-webext/-/issues/29#note_3035763
             - Upgrade snowflake broker machine from Debian 10 
(https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40349)
             - Address TTP-03-001 WP1: Snowflake broker 
vulnerability(https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40329)
             - Vantage point maintaince
             - merge request processing
                 - Merge request reviews
     Next Week/TODO:
         - Merge request reviews


onyinyang: 2023-06-06
     Last week(s):
         - Finished key rotation implementation
         - Working toward building tor-browser with lox-wasm binary to 
help out with
             integration work as needed
         - Preparation for MSR talk
     Next week:
         - MSR talk
         - Work on outstanding milestone issues: 
https://gitlab.torproject.org/tpo/anti-censorship/lox/-/milestones/1#tab-issues
             - prepare for end to end testing of the Lox system with 
browser integration
         Later:
         - begin implementing some preliminary user feedback mechanism 
to identify bridge blocking based on Vecna's work
         - improve metrics collection/think about how to show Lox is 
working/valuable
         - sketch out Lox blog post/usage notes for forum

     (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?

theodorsm: 2023-06-06
         Last weeks:
             - Writing for my thesis
         Next weeks:
             - Add hook to pion/webrtc so it can be used in snowflake, 
currently waiting on new pion/dtls release
             - Add randomized fingerprints
             - Writing my thesis
         Help with:
             - Finding conferences that are relevant for submitting 
paper on my work. (unfortunately too late for FOCI24)



Facilitator Queue:
     onyinyang meskio shelikhoo
1. First available staff in the Facilitator Queue will be the 
facilitator for the meeting
2. After facilitating the meeting, the facilitator will be moved to the 
tail of the queue

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