Here are our meeting logs:

http://meetbot.debian.net/tor-meeting/2021/tor-meeting.2021-08-12-16.00.html

and our meeting pad:

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

Next meeting: Thursday August 12th 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 checkin about the status of anti-censorship work at Tor. Coordinate collaboration between people/teams on anti-censorship at Tor.

== Announcements ==

Job opening on the anti-censorship team: https://www.torproject.org/about/jobs/software-developer-anticensorship-2/ \o/

== Discussion ==

v3 of the webext manifest doesn't support creating peerconnections in the background

https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

https://github.com/w3c/webrtc-extensions/issues/77

we will present our need to https://bugs.chromium.org/p/chromium/issues/detail?id=1207214 to encourage them to permit WebRTC in service workers

Testing Tor in TM: https://gitlab.torproject.org/tpo/community/support/-/issues/40030

relay users dropped off in the latter half of July 2021

https://metrics.torproject.org/userstats-relay-country.html?start=2021-05-14...

ggus found a volunteer to help with testing. obfs4, meek-azure, and snowflake did not work; a private obfs4 bridge worked.

http://emma.mhgb.net/ was not reachable, so ggus set up a mirror at http://emma.gus.computer/

hackerncoder is combining all the gettor scripts

while doing so, it will be helpful to also start using 1 archive.org item or collection per release https://gitlab.torproject.org/tpo/anti-censorship/rdsys/-/issues/32#note_273...

== Actions ==

== Interesting links ==

USENIX Security 2021 papers https://www.usenix.org/conference/usenixsecurity21/technical-sessions

"Domain Shadowing: Leveraging Content Delivery Networks for Robust Blocking-Resistant Communications" https://www.usenix.org/conference/usenixsecurity21/presentation/wei

"How Great is the Great Firewall? Measuring China's DNS Censorship" https://www.usenix.org/conference/usenixsecurity21/presentation/hoang

"Balboa: Bobbing and Weaving around Network Censorship" https://www.usenix.org/conference/usenixsecurity21/presentation/rosen

"Weaponizing Middleboxes for TCP Reflected Amplification" https://www.usenix.org/conference/usenixsecurity21/presentation/bock

"Defeating DNN-Based Traffic Analysis Systems in Real-Time With Blind Adversarial Perturbations" https://www.usenix.org/conference/usenixsecurity21/presentation/nasr

== 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 2021-08-12 Last week: - hiring tasks - fix issue with bridgestrap metrics (bridgestrap#20) - visualized the result of our snowflake and obfs4 probe tests - s28 meetings and deliverables - discussions with OONI about OONI tor tests: - https://github.com/ooni/probe/issues/1730 - reviewed snowflake!52 - reviewed snowflake-webext!21 - debugged issue with snowflake#25595 - fixed bridgestrap restart by moving from cron to systemd timers - worked on BridgeDB X-Forwarded-For parsing for Moat (bridgedb#40027) - deployed snowflake#48 This week: - more hiring and s28 meetings - help the browser team with tor's autoconnect feature - reviews - rdsys!11 - follow up on OONI tor tests - bridgedb web page overhaul (bridgedb#34322) Needs help with:

arlolra: 2021-08-12

Last week:

- Migrate to v3 of the webextension manifest

Next week:

- Maybe get back to snowflake-webext #10

- Write up the pitch for our use case for supporting creating PeerConnections in background service workers https://github.com/w3c/webrtc-extensions/issues/77

Help with:

-

dcf: 2021-08-12

Last week:

- approved snowflake buffer size increase https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

- merged Snowflake AMP cache feature following review https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

Next week:

Help with:

maxb: 2021-07-15

Last week:

- Opened https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf... re: utls for broker negotiation

- Worked on github.com/max-b/nat-testing for https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowf...

- Added a snowflake-proxy-no-nat and a snowflake-client-no-nat to help with debugging

- Successfully making connections from snowflake-client and snoflake-client-no-nat through the snowflake-proxy-no-nat, but not having any success with the snowflake-proxy (with nat).

- Added a local dockerized STUN server

Next week:

- Use wireshark to figure out the difference between successful snowflake-proxy-no-nat and unsuccessful snowflake-proxy-nat

- Work on implementing different NAT types, particularly in a way that's conducive to automatic testing

- Add testing wrapper w/ "pass/fail" conditions

meskio: 2021-07-22

Last week:

- submit the "final" gettor rdsys integration (rdsys!11 rdsys#32)

- report number of clients on the snowflake webextension (snowflake-webext!19)

- Wait pollInterval in snowflake between proxy offers (snowflake#40055 snowflake!51)

- link anti-censorship doc from the TPA wiki (team#4)

- review snowflake README clean ups (snowflake!49)

- looking up at issues with bridgestrap tests and CollecTor (bridgestrap#20)

- fixes in mutex usage in bridgestrap collector metrics (bridgestrap!10)

Next week:

- AFK for the next 3 weeks

Help with:

-