August 2021 - tor-relays - lists.torproject.org

I bumped out some more bad relays
by Roger Dingledine 10 Dec '21

10 Dec '21

Hi folks, I spent some time this week refining a new exit scanner, and today we pushed some new reject rules to kick out some relays that we confirmed were running mitmproxy to do more sslstrips. For past context, see these urls: https://blog.torproject.org/bad-exit-relays-may-june-2020 https://lists.torproject.org/pipermail/tor-relays/2020-July/018656.html https://lists.torproject.org/pipermail/tor-talk/2014-July/034219.html Expect some upcoming next steps that aim to change the fundamental arms race, including experiments to use https by default in Tor Browser, either via HTTPS Everywhere's "Encrypt All Sites Eligible" option (you can turn that on right now) or via Firefox's upcoming built-in version of the idea: https://gitlab.torproject.org/tpo/applications/tor-browser/-/issues/19850 For completeness, I'm including below the set of fingerprints that we bumped out. Note that we didn't confirm misbehavior from all of them -- some of them we're bumping out because they seemed sufficiently similar to the confirmed ones. If any of these are your relays, please speak up! Thanks, --Roger Group #1: COMID (coronamitmdisease2019) at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roup #2: info(a)cypherpunklabs.com at OVH 023455597DAB689EE84FB3A7BC7FC5F9A3E27FD6 044E647F34EDA4AC975EDAD628C4E9BCFFF1FB08 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OVH relays probably run by the above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55D490E9E440DD4458F16ABCDD79F48396D55EA9 78F699D58F3353AB6C4CE39E3BD96CE87439753A B1896E58FDEB5627B6B8334E6ABD42767AB8B0D9

5 13

Dropped off consensus (0.4.4.5)
by Felix 23 Oct '21

23 Oct '21

Hi everybody This is early. Yesterday I upgraded Ichotolot60 1AE039EE0B11DB79E4B4B29CBA9F752864A0259E from 4.2.7 to 4.4.5. Now I see in the consensus health: moria1 Fast Run Stab V2Dir Valid bw=566 tor26 Fast Guard Stab V2Dir Valid dizum Fast Guard Stab V2Dir Valid gabel. Fast Stab V2Dir Valid bw=1130 danne. Fast Guard Run Stab V2Dir Valid maatu. Fast Stab V2Dir Valid bw=1200 farav. Fast Guard Run Stab V2Dir Valid bw=2970 longc. Fast Stab V2Dir Valid bw=490 bastet Fast Guard Run Stab V2Dir Valid bw=3520 And _no_ Authority "owns" the relay. Old Apr 02 21:51:31.872 [notice] Tor 0.4.2.7 running on FreeBSD with Libevent 2.1.11-stable, OpenSSL LibreSSL 3.0.2, Zlib 1.2.11, Liblzma 5.2.4, and Libzstd 1.4.4. New Sep 18 21:00:22.384 [notice] Tor 0.4.4.5 running on FreeBSD with Libevent 2.1.12-stable, OpenSSL LibreSSL 3.2.1, Zlib 1.2.11, Liblzma 5.2.4, and Libzstd 1.4.5. (Yeah, some Lib stuff is new too, hehe) The "Guard !Run Stab" consensus looks quite interesting to me. How can it be? Other relays with that nice "Guard !Run Stab" dropped off consensus over night (or since days) and no authority "owns" them too: HORUS1 0.4.4.4-rc norisknofun 0.3.5.10 ULayerKiriakou 0.4.3.5 Stellvia 0.4.3.6 torexit42 (StaleDesc) 0.4.1.6 torpidsDEhetzner1 0.4.3.2-alpha (3 days) karen (StaleDesc) 0.4.2.7 Stephen304 0.4.2.7 (3 days) Rigel2020 (StaleDesc) 0.4.3.6 dgplug (FallbackDir, StaleDesc) 0.4.4.5 =?= May-be the operators updated and are now in the same floating position? May-be this is super normal and came to my attention by surprise? Anyways, I let everthing run for a day or so. Time can heal. -- Cheers, Felix

5 8

New round of measuring the accuracy of Tor relays' advertised bandwidth
by Georg Koppen 23 Sep '21

23 Sep '21

Hello! You might recall we ran two "speed tests" so far for investigating the accuracy of a relay's advertised bandwidth, one in 2021[1] and another one earlier this year[2]. We gonna pick this test up again this week. However, this time it won't be just a single run but we are rather scheduling the experiment to be on for two weeks and then off for two weeks for the upcoming weeks/months (see: the third item in our network experiments strategy[3] for some rationale). More exactly: we'll run our measurement script for roughly one week, then wait about a week for flooded values leaving the relay descriptors, then 2 weeks off, then starting again... The experiment itself has not changed: we are planning to download several large data streams for a period of about 20 seconds with the goal to get a better estimation of the relay's true capacity. There are more details related to this experiment in particular in an older mailing list thread[1], in case anyone is interested and has not seen those yet. As in previous instances of this "speed test" there is the option for an opt-out. Let us know if any of you doesn't want to participate and we remove your relay(s) from the list to scan. Finally, an up-to-date status about the flooding being on/off (and other experiments scheduled) can be found on our status page[4]. Thanks, Georg [1] https://lists.torproject.org/pipermail/tor-relays/2019-July/017535.htmlff. [2] https://lists.torproject.org/pipermail/tor-relays/2021-May/019649.html [3] https://gitlab.torproject.org/tpo/network-health/team/-/wikis/Network-exper… [4] https://status.torproject.org/affected/network-experiments/

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IPv6 reachability tests fail on CenturyLink IPv6 6rd - reachability broken?
by Neel Chauhan 13 Sep '21

13 Sep '21

Hi, I recently moved into a home with CenturyLink Fiber and moved my FreeBSD relays to the said home. Fingerprints: https://metrics.torproject.org/rs.html#details/B0F9BA27944FA59E3B1A182208FF… https://metrics.torproject.org/rs.html#details/DB710B14D7329B7289CFCC547F48… In my relay logs, while IPv4 works fine, I get these IPv6 errors: Aug 26 18:47:01.000 [notice] Auto-discovered IPv6 address [REDACTED]:143 has not been found reachable. However, IPv4 address is reachable. Publishing server descriptor without IPv6 address. Aug 26 19:47:01.000 [notice] Auto-discovered IPv6 address [REDACTED]:143 has not been found reachable. However, IPv4 address is reachable. Publishing server descriptor without IPv6 address. [2 similar message(s) suppressed in last 2400 seconds] CenturyLink does use 6rd for IPv6 in case that matters, however I can telnet the relay ORPort via IPv6 from a VPS. My firewall is an OPNsense box which terminates PPPoE/6rd. I am running tor-0.4.6.4-rc. Yes I know it's not the "latest", but I usually run the "beta" versions on my relays from FreeBSD pkg. Rebooting both my OPNsense box and my server doesn't work. The same relay fingerprints/torrcs/keys worked fine on Google Fiber/Webpass native IPv6 in another address. I'm guessing IPv6 reachability tests aren't working right now since it worked with CL 6rd earlier today, or maybe CL misconfigured their network. It's not a biggie for me, but while I could go Comcast with better IPv6, I'd rather have a high bandwidth relay than an IPv6 one with Comcast's slow uploads/caps. Other Seattle ISPs like Webpass, Wave, and Atlas aren't in my new home. -Neel Chauhan === https://www.neelc.org/

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Burning Bridges
by torix 10 Sep '21

10 Sep '21

I think I remember Roger Dingledine saying somewhere that bridges' ips gradually get learned and put on ban lists. I have some bridges bought for the year. When renewal time comes up, does it make sense to let them go and buy new vms for the next year rather than renew them? I don't know if it matters what pool a bridge is in. TIA, --Torix Sent with [ProtonMail](https://protonmail.com/) Secure Email.

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router_do_orport_reachability_checks()
by Gary C. New 10 Sep '21

10 Sep '21

All: Does anyone here know the procedure of the router_do_orport_reachability_checks() function? I've increased logging of my Tor Relay to info and taken several packet-captures, but can't seem to identify connections initiated by my Tor Relay when verifying my ORPort reachability. I just see connections from other Tor Relays initiate connections with my Tor Relay. Any detail that can be provided regarding the procedure of the router_do_orport_reachability_checks() function is greatly appreciated. Respectfully, Gary

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Old version in Debian/Ubuntu repo?
by Eric Jacksch 05 Sep '21

05 Sep '21

Greetings, Just a heads-up that a fresh install on Ubuntu 20.04 as per https://community.torproject.org/relay/setup/guard/debianubuntu/ Results in a version warning in the log file: "Please upgrade! This version of Tor (0.4.2.7) is not recommended, according to the directory authorities. Recommended versions are: ...." Cheers, Eric

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Did obfs4proxy stopped working for you on Debian Buster or Bullseye?
by s7r 03 Sep '21

03 Sep '21

Hello, Did you try running obfs4proxy on Debian Buster or Bullseye and it worked? For me it stopped working entirely. All it says is: [warn] Pluggable Transport process terminated with status code 256 Here is what I checked so far: - I am on Debian Bullseye with all packages up to date - go lang version is go1.15.9 linux/amd64 - obfs4proxy version is obfs4proxy-0.0.12-dev (compiled from git) - Tor version is 0.4.7.0-alpha-dev I have edited /lib/systemd/system/tor(a)default.service & tor@.service to NoNewPrivileges=no and also installed libcap2-bin and setcap +ep to obfs4proxy executable. The libcap2-bin step is because I want to bind to a lower port, but even if I try to bind to a higher port like 50001 it will still not work and report the same: Pluggable Transport process terminated with status code 256. On another server I did a software upgrade from stretch to buster by apt dist upgrade and obfs4proxy stopped working as well. I am still digging here cause there are chances I did some mistakes while upgrading, so I am just mentioning the Bullseye problem because there are no excuses there, it should work, it's a clean fresh new install from scratch. Can someone please have another look to see if the problem is just on my side or if it's persistent among Bullseye installs, we should update the wiki bridge howto. Thanks.

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Inflated throughput measures from torproject metrics?
by torix 02 Sep '21

02 Sep '21

The advertized bandwidth of my aramis family of relays has gone up from around 45 to 67 total since last week. ZimmerLinux (quetzalcoatl) sees inflation as well. I found a graph here of quetzalcoatl: https://nusenu.github.io/OrNetStats/quetzalcoatl-relays.org.html which whose weekly graph currently shows everything staying the same until about Wed. 25 Aug., then creeping up. He hasn't added any relays, so it looks as though the bwauths have changed something. I'm bringing this up because something seems a little out of control here. TIA, --Torix

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Expected relay performance
by fugel1 31 Aug '21

31 Aug '21

Hi all! I've been running two tor relays [1] on the same machine for the past three weeks or so on my home connection (1 gigabit fibre). When I was looking for appropriate hardware (I needed something fanless) I was surprised at the almost complete absense of information online about what kind of relay performance one can expect from different cpus. Until the current relays speedtest that started on August 25 [2], my relays were slowly ramping up to about 4 MB/s up and down with a consensus weight of 15-19000. Hence, I was expecting to have to wait a few months to find out what the hardware was capable of, BUT then the mentioned test started! Both my relays instantly got an advertised bandwidth over 70 MB/s, and soon after consensus weights of 85000 and 105000 respectively (maatuska even hade the latter at 190000 for a while). The relays are now pushing over 20 MB/s each which enables me to start filling the current performance information void with the following: A fanless Core i5-8250 with HT disabled, running OPNSense 21.7.1, can push 22 MB/s of tor traffic up and down on each of two tor instances, with each main tor process consuming no more than 50 percent of one core and an average across all cores of 35-38 percent. Sorry about the lengthy post! :) [1] https://metrics.torproject.org/rs.html#details/F387C5F92B784137933202BB5E4F… [2] https://status.torproject.org/experiments/2021-08-26-relay-speed-test/

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