[tor-project] Anti-censorship team meeting notes, 2022-5-19

Thu May 19 16:48:05 UTC 2022

Hey everyone!

Here are our meeting logs:

http://meetbot.debian.net/tor-meeting/2022/tor-meeting.2022-05-19-15.59.html  

And our meeting pad:

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

Next meeting: Thursday May 26th 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 Tor.

== 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 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%93&state=opened&label_name%5b%5d=Sponsor%2028&milestone_title=None
		* Sponsor 96
			* https://gitlab.torproject.org/groups/tpo/-/milestones/24

== Announcements ==

== Discussion ==

	* Snowflake doesn't work in Russia (connection failure by timeout)
		* https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/issues/40030
		* https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40140
		* https://ntc.party/t/a-new-snowflake-blocking-rule-offset-of-supported-groups-in-dtls-client-hello/2420
			* the new reported blocking rule, with a different offset to supported_groups than what we diagnosed in December 2021 (https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40014#note_2765074) is real
			* however Snowflake still works in Russia, apparently
		* Is there a tool to do automated bisection of packet contents and discover such blocking rules?
			* OONI once had a module called daphn3
				* https://github.com/OpenObservatory/ooniprobe-debian/blob/master/ooni/kit/daphn3.py
				* https://speakerdeck.com/hellais/ooni-and-daphn3
			* Also Geneva could work for this purpose https://geneva.cs.umd.edu/
	* polyanthum got upgraded to bullseye
		* everything is working except for bridgestrap metrics
	* Any anti-censorship stands/activities at MCH2022 (https://mch2022.org/)?

== 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): last updated 2022-05-19
	Last week:
    - finished setting up networked VMs for conjure development
    - reviewed some snowflake MRs
    - emailed conjure people about weird license for required kernel module
	This week:
    - continue work on conjure PT
    - continue snowflake maintenance tasks
	Needs help with:

dcf: 2022-05-19
	Last week:
		- posted a chart of estimated daily unique Snowflake users https://gitlab.torproject.org/tpo/network-health/metrics/analysis/-/issues/40012#note_2803514
		- helped investigate a reported DTLS blocking rule in Russia https://gitlab.torproject.org/tpo/anti-censorship/censorship-analysis/-/issues/40030 https://ntc.party/t/a-new-snowflake-blocking-rule-offset-of-supported-groups-in-dtls-client-hello/2420 https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40140#note_2803710
		- snowflake CDN bookkeeping https://gitlab.torproject.org/tpo/anti-censorship/team/-/wikis/Snowflake-costs
		- analyzed OONI stunreachability measurements from Russia https://lists.torproject.org/pipermail/anti-censorship-team/2022-May/000237.html
	Next week:
		- look at STATUS VERSION proposal https://gitlab.torproject.org/tpo/core/torspec/-/merge_requests/63
		- set up access control on the snowflake-02 bridge https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40122#note_2797271
	Help with:

arlolra: 2022-04-07
	Last week:
		- Merged the rest of snowflake !81
	Next week:
	  - Get to snowflake-webext #10
	Evergreen:
		- Figure out where in pion/webrtc ALPN should be configured and used
		- Maybe add Chacha20Poly1305 to pion/dtls
		https://github.com/pion/dtls#planned-features
		https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40014#note_2764731
	Help with:
		- 

meskio: 2022-05-19
	Last week:
			- add a delay to BridgeDB reconnections to rdsys backend (bridgedb!40)
			- release a new version of snowflake-proxy and obfs4-bridge docker images for multiple archs
			- fix issues after polyanthum upgrade to bullseye
	Next week:
			- rethink distributor retries to the rdsys backend (rdsys#99)
			- use systemd to run bridgedb (team#72)

Shelikhoo: 2022-05-19
   Last Week:
     - [Merge Request] Add Distributed Snowflake Server Support (snowflake!87)     
		- [Merge Request Awaiting] Add SOCKS5 forward proxy support to snowflake (snowflake!64)
		- [Research & Coding] WebSocket + CDN Based Probe Control Connection Forwarder (shelikhoo/LogCollectorAncillary#3)
		- [Coding & Deployment] Proposal: Centralized Probe Result Collector (anti-censorship/team#54)
		- [Discussion & Deployment] Migrating Controling git repo to Tor Gitlab Instance (shelikhoo/LogCollectorAncillary#5) <- awaiting/blocked
   Next Week:
		  - [Coding] Distributed Snowflake Bridges (continue)
		  - [Coding] Distributed Snowflake Bridges (Javascript ver.)
		  - [Merge Request] Add Distributed Snowflake Server Support (snowflake!87)
		  - [Coding & Deployment] Proposal: Centralized Probe Result Collector (anti-censorship/team#54)
		  - [Research & Coding] WebSocket + CDN Based Probe Control Connection Forwarder (shelikhoo/LogCollectorAncillary#3)
		  - [Research & Coding] Implement metrics to measure snowflake churn (https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/34075)

Itchy Onion: 2022-05-12
    Last week:
        - audit s28 PI meeting
        - work on the snowflake issues assigned to me (!84, !88)
        - review MRs assigned to me
    This week:
        - work on the snowflake issues assigned to me
        - review MRs assigned to me
        - work on s28 issue 81

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: https://gitlab.torproject.org/tpo/anti-censorship/monit-configuration/-/merge_requests/1

HackerNCoder: 2021-12-16
	This week:
    Last/done:
        Setup web mirror on tor.encryptionin.space
    Next:
        Get (new VPs with) new IP and setup new web mirror on new domain

maxb: 2021-09-23
	Last week:
		- Worked on https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40054 re: utls for broker negotiation
		- Had conversation with someone about upstream utls http round tripper https://github.com/refraction-networking/utls/pull/74
		- Too busy with work :/
	Next week:
		- _Really_ want to get a PR for utls round tripper

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