13:59:07 <anadahz> #startmeeting
13:59:07 <MeetBot> Meeting started Tue Jun 28 13:59:07 2022 UTC.  The chair is anadahz. Information about MeetBot at http://wiki.debian.org/MeetBot.
13:59:07 <MeetBot> Useful Commands: #action #agreed #help #info #idea #link #topic.
13:59:25 <anadahz> Hi everyone, time for our monthly PT meetup.
13:59:42 <ssloan[m]> hi all
13:59:48 <msim> o/
14:00:00 <anadahz> Please use the agenda if you would like to suggest any topics -- https://pad.riseup.net/p/pt-meetup-keep
14:00:10 <anadahz> or updates :)
14:07:02 <anadahz> I recently had a look into possible way to circumvent censorship/pass Internet traffic via VoIP protocol. If anyone seen a PoC or read any research about it, please share it with me.
14:07:56 <ssloan[m]> Yes, also interested in the above
14:11:31 <anadahz> Some time ago there was a quite some big spike of Tor users in many countries.
14:12:48 <anadahz> Seem that could be due to a bug in Tor metrics: https://gitlab.torproject.org/tpo/network-health/metrics/website/-/issues/40057
14:14:29 <anadahz> Though that bug refers to a specific date (04/06/2022) and only for Snowflake.
14:16:41 <anadahz> Not sure if this is the case of the 4 fold increase of Tor users in Turkmenistan (without the use of any PT/bridge) -- https://metrics.torproject.org/userstats-relay-country.html?start=2022-03-25&end=2022-06-28&country=tm&events=off
14:16:58 <anadahz> ^this is still ongoing BTW
14:18:13 <anadahz> OONI data suggest that vanilla Tor and Tor snowflake PT are both blocked in Turkmenistan.
14:20:48 <anadahz> I don't see any other topics on the agenda for today.
14:22:15 <anadahz> Feel free to discuss any topic otherwise we can end this meeting early today :)
14:22:16 <anadahz> It
14:25:31 <xhdix[m]> Hi,
14:25:31 <xhdix[m]> https://github.com/net4people/bbs/issues/39#issuecomment-1165806197
14:25:51 <anadahz> xhdix[m]: hi!
14:26:10 <xhdix[m]> Although this has been temporarily resolved.
14:26:38 <xhdix[m]> also this one:
14:26:38 <xhdix[m]> https://github.com/net4people/bbs/issues/118
14:26:58 <xhdix[m]> I think we will see them soon again.
14:27:26 <anadahz> By resolved you mean they were implemented for a short period?
14:27:54 <anadahz> (the 80
14:29:10 <anadahz> xhdix[m]: Curious, how did you find about the 80% ?
14:30:39 <anadahz> I hope this is not related to school/university exams in Iran.
14:32:12 <xhdix[m]> I had seen cases of this type of censorship a few years ago, but they were few.
14:32:12 <xhdix[m]> In the past week, it has increased a lot. But now there is no problem. And I think this lack of problem is temporary.
14:32:12 <xhdix[m]> This is a hypothetical number. Blocking Chrome fingerprint to Amazon and some other ip ranges. And even most of the Iranian services that were hosted outside of Iran are 80% of what we have left.
14:32:42 <xhdix[m]> > school/university exams
14:32:42 <xhdix[m]> no it wasn't.
14:33:26 <anadahz> Thanks for the insights, perhaps they have been upgrading some core of the censorship infrastructure?
14:34:41 <xhdix[m]> yes. I have seen that they know can speak to client from the start. (sending SYN,ACK then PSH,ACK and ACK, and finally, FIN,ACK)
14:35:06 <xhdix[m]> (* they = censorship system)
14:36:46 * xhdix[m] uploaded an image: (75KiB) < https://matrix.org/_matrix/media/r0/download/matrix.org/bqnEddxyTNFbMehMloqeixWG/image.png >
14:39:46 <anadahz> xhdix[m]: Do you see those ids in all traffic, or only to the blocked traffic?
14:40:13 <xhdix[m]> only blocked ones
14:41:01 <xhdix[m]> censorship system will reflect the IP.ID and window size. and some cases will reflect the TTL too.
14:41:38 <xhdix[m]> xref: https://github.com/net4people/bbs/issues/47
14:41:52 <anadahz> I would love to have such ids annotated/added to OONI measurements, it could make identification/correlation of middleboxes much easier.
14:47:21 <xhdix[m]> I agree, still, having IP layer data in OONI probes requires a lot of effort and research.
14:48:30 <anadahz> Indeed and even harder to remove potential PII data.
14:49:20 <anadahz> Even better a TraceVis OONI test :D
14:51:17 <xhdix[m]> definitely! with that, I can rest easy :D
14:52:38 <anadahz> :)
14:54:20 <anadahz> We have moved the PT meeting from Thursday (Glitter Meetup) to Tuesday and in different dates so that folks that cannot do it on specific days may be able to attend.
14:55:01 <anadahz> If you feel that the time/day should be change please send me a msg or just mention it here.
14:57:34 <anadahz> Thank you all for attending!
14:57:37 <anadahz> #endmeeting