Hey everyone!
Here are our meeting logs:
http://meetbot.debian.net/tor-meeting/2024/tor-meeting.2024-11-28-16.00.html
And our meeting pad:
Anti-censorship work meeting pad
···
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Anti-censorship
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Next meeting: Thursday, December 05 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: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 projects, we are working on:
* All needs review tickets:
* Merge requests · Anti-censorship · GitLab
* Project 158 <-- meskio working on it
* Issues · Anti-censorship · GitLab
== Announcements ==
== Discussion ==
(old)
* Snowflake blocking in Russia November 2024
* Snowflake partially blocked in Russia 2024-11 (#40407) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
* No apparent difference in DTLS handshakes between proxies that continue working and proxies that stop working.
* Reports say that some proxies stop working, but only after transferring some traffic.
* Hard to test because we can't easily control the proxy. It would be a good idea to set up a small test deployment to afford us more experimental control.
* cohosh will work on that.
* Traffic analysis fingerprinting? An old padding patch: Potential TLS-over-DTLS blocking in China · Issue #255 · net4people/bbs · GitHub
(New Nov 21)
* Snowflake blocking in Russia November 2024
* Restored copy-paste signaling (manual without broker) to be able to control the proxy connection.
* Add a copy paste rendezvous method for client (a4a574a4) · Commits · Cecylia Bocovich / Snowflake · GitLab
* Still blocked with a new proxy: therefore likely some kind of protocol fingerprinting, not proxy enumeration.
* Snowflake partially blocked in Russia 2024-11 (#40407) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
* Still blocked with client-side padding patch as well.
* Snowflake partially blocked in Russia 2024-11 (#40407) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
* theodorsm's covertDTLS fork Files · covert-dtls-test · theodorsm / Snowflake · GitLab
* Snowflake broker transition
* Next monday 2024-11-25 there will be a DNS switch from the current broker to the new broker primary.
* Request to update domain snowflake-broker.torproject.net with correct CAA record (#41878) · Issues · The Tor Project / TPA / TPA team · GitLab
(new Nov 28)
* Broker Transition Anomaly
* (added by non-Tor member WofWca): Evaluate [the plan for "Multi-Pool Matching Support"](Multi-Pool Matching Support In Snowflake (#40156) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab)?
* Snowflake blocking in Russia seems to have stopped
== Actions ==
== Interesting links ==
\*
== 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): 2024-11-28
Last week:
- followed up on the snowflake blocking in Russia
- helped debug and recover from the snowflake broker upgrade
- caught up a bit on reviews
- fixed the logging of the new proxy event (snowflake#40413)
- started looking at alerts for censorship events (snowflake#40416)
This week:
- alerts for censorship events (snowflake#40416)
- keep looking at snowflake blocking in Russia
- take care of review backlog
- finish snowflake dependency upgrades that were causing problems
- take a look at snowflake web and webext translations and best practices
- make changes to Lox encrypted bridge table
- Draft: Simplify BridgeLine struct and make it variable length (!147) · Merge requests · The Tor Project / Anti-censorship / lox · GitLab
Needs help with:
- what was that censorship events mailing list?
dcf: 2024-11-21
Last week:
- released goptlib v1.6.0 goptlib v1.6.0 - anti-censorship-team - lists.torproject.org
Next week:
- comment on updates to unreliable snowflake transport Draft: Unreliable+unordered WebRTC data channel transport for Snowflake rev2 (!315) · Merge requests · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
- open issue to have snowflake-client log whenever KCPInErrors is nonzero Deploy snowflake-server for QueuePacketConn buffer reuse fix (#40260) (#40262) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
- parent: Improve bug discovery process (#40267) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
- open issue to disable /debug endpoint on snowflake broker
Help with:
meskio: 2024-11-28
Last week:
- investigate why the metrics of the new broker were not arriving to prometheus (tpa/team#41902)
- try to upgrade snowflake gitlab CI to debian stable and fail (for now)
- multiple grant writting work (logic model, reviews, ...)
- reports for grants fun
- WIP: update snowflake proxy debian package (snowflake#40414)
Next week:
- update snowflake proxy debian package (snowflake#40414)
Shelikhoo: 2024-11-28
Last Week:
- [Pending] snowflake broker update/reinstall(cont.):
- [Awaiting Review] Unreliable+unordered WebRTC data channel transport for Snowflake rev2 (cont.)( Draft: Unreliable+unordered WebRTC data channel transport for Snowflake rev2 (!315) · Merge requests · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab ) improvements
- Vantage point deployment in Iran
- Snowflake new broker deployment
- Merge request reviews
Next Week/TODO:
- Merge request reviews
- Work on finishing snowflake container release(and fix the comments)
- Incorrectly flattened container image with "pull" command
Incorrectly flattened container image with "pull" command (#40417) · Issues · The Tor Project / Anti-censorship / Pluggable Transports / Snowflake · GitLab
onyinyang: 2024-11-21
Last week(s):
- working on refactor of Lox (library) protocols to improve issuing efficiency as described in: https://eprint.iacr.org/2024/1552.pdf
- WIP MR: Draft: Implement uCMZ for Lox credentials (!284) · Merge requests · The Tor Project / Anti-censorship / lox · GitLab
- Adjusted dependencies to line up with non-wasm browser integration for: Consider dropping Lox's WASM (#43096) · Issues · The Tor Project / Applications / Tor Browser · GitLab):
- Browser integration changes (!283) · Merge requests · The Tor Project / Anti-censorship / lox · GitLab
- Updating renovate bot to ignore these dependencies (and maybe others)
- Fixed up wasm changes in Improve testing branch for Lox distributor/wasm interactions (!271) · Merge requests · The Tor Project / Anti-censorship / lox · GitLab
Next week:
- Fix up Troll-patrol MR
- Deploy test distributor
- Continue work on improving issuer efficiency in Lox protocols
- update lox protocols to return duplicate responses for an already seen request
- Work on outstanding milestone issues:
in particular: Increase the acceptable time for bridgeline failure (#69) · Issues · The Tor Project / Anti-censorship / lox · GitLab
- key rotation automation
Later:
pending decision on abandoning lox wasm in favour of some kind of FFI? https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/43096):
\- add pref to handle timing for pubkey checks in Tor browser
\- add trusted invitation logic to tor browser integration:
- improve metrics collection/think about how to show Lox is working/valuable
- sketch out Lox blog post/usage notes for forum
\(long term things were discussed at the meeting\!\):
\- 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: 2024-10-24
Last weeks:
- Adjusting to post-student life
- Testing out beta releases of pion dtls and webrtc
Next weeks:
- Update Snowflake to use latest pion upstream releases
- Test Snowflake fork with covert-dtls
- Condensing thesis into paper
Help with:
- Feedback on thesis
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