tor-relays February 2021

tor-relays@lists.torproject.org

43 participants
41 discussions

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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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

syn flood iptables rule
by Toralf Förster 02 Apr '21

02 Apr '21

The following 3 statements # Make sure NEW incoming tcp connections are SYN packets; otherwise we need to drop them. $IPT -A INPUT -p tcp ! --syn -m state --state NEW -j DROP # DDoS $IPT -A INPUT -p tcp -m state --state NEW -m recent --name synflood --set $IPT -A INPUT -p tcp -m state --state NEW -m recent --name synflood --update --seconds 60 --hitcount 10 -j DROP seems to work and to help here ata fast Tor relay. CPU went down from 109% to 95%. There're 500 connections less than before for a Tor fast relay. The /proc/net/xt_recent/synflood is quickly filled. Unfortunately I cannot change the "ip_list_tot" of "xt_recent" b/c I do use a non-modular kernel. Does anybody knows a circumvention? Are there any objections against this approach? -- Toralf

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Bridge operator iat_mode setting
by torjoy 04 Mar '21

04 Mar '21

Hi All, I work with time and frequency references and run some tor bridges. What is the objective of "iat_mode" setting? Is an good timming reference important for this setting? For now, i'm adminstrating 3 briges, one with iat_mode=0, iat_mode=1 and iat_mode=2. Could you explain or forward me to some reading about it? Best regards, Luiz Sent with [ProtonMail](https://protonmail.com) Secure Email.

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IPv6 auto-discovery vs. privacy extensions
by Onion Operator 01 Mar '21

01 Mar '21

Saluton, My relay started to log this message since 0.4.5.5: Auto-discovered IPv6 address [...]:443 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] I think it started with the introduction of IPv6 auto-discovery. The problem, as I understand it, is that my relay has IPv6 privacy extensions enabled and therefore the IPv6 detection logic gets fooled. Indeed the IPv6 I see in the logs is one of the temporary addresses used as client towards other relays. Relevant config is: ORPort 443 IPv4Only ORPort [...]:443 IPv6Only I added the IPv{4,6}Only options only in searching a solution to this problem, before 0.4.5.5 the IPv6 relay worked perfectly without. In reading the documentation of AddressDisableIPv6 I got the impression that if (any?) ORPort is configured with IPv4Only the IPv6 auto-discovery gets disabled but evidence does not support my understanding. Is it a bug? Any other way to disable IPv6 auto-discovery? -- flev

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bug message from 02/28/2020 on 4.5.6
by tor 28 Feb '21

28 Feb '21

Hi All, This popped up today after running successfully for about a week. -matt x 09:32:50 [NOTICE] Self-testing indicates your ORPort *.*.*.*:443 is reachable from the outside. Excellent. Publishing server descriptor. x 09:32:50 [NOTICE] Now checking whether IPv4 ORPort *.*.*.* :443 is reachable... (this may take up to 20 minutes -- look for log messages indicating success) x 09:32:26 [NOTICE] External address seen and suggested by a directory authority: *.*.*.* x 09:30:52 [NOTICE] Bootstrapped 100% (done): Done x 09:30:52 [NOTICE] Bootstrapped 95% (circuit_create): Establishing a Tor circuit x 09:30:52 [NOTICE] Bootstrapped 90% (ap_handshake_done): Handshake finished with a relay to build circuits x 09:30:52 [NOTICE] Bootstrapped 89% (ap_handshake): Finishing handshake with a relay to build circuits x 09:30:52 [NOTICE] Bootstrapped 85% (ap_conn_done): Connected to a relay to build circuits x 09:30:52 [NOTICE] Bootstrapped 80% (ap_conn): Connecting to a relay to build circuits x 09:30:52 [NOTICE] Bootstrapped 75% (enough_dirinfo): Loaded enough directory info to build circuits x 09:30:51 [NOTICE] Bootstrapped 68% (loading_descriptors): Loading relay descriptors x 09:30:51 [NOTICE] Bootstrapped 63% (loading_descriptors): Loading relay descriptors x 09:30:51 [NOTICE] Bootstrapped 55% (loading_descriptors): Loading relay descriptors x 09:30:50 [NOTICE] Bootstrapped 50% (loading_descriptors): Loading relay descriptors x 09:30:50 [NOTICE] Bootstrapped 45% (requesting_descriptors): Asking for relay descriptors x 09:30:50 [NOTICE] Bootstrapped 15% (handshake_done): Handshake with a relay done x 09:30:50 [NOTICE] Bootstrapped 14% (handshake): Handshaking with a relay x 09:30:50 [WARN] Bug: /usr/lib/aarch64-linux-gnu/libevent-2.1.so.6(+0x21a10) [0xffff8575ba10] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(+0x81854) [0xaaaae3745854] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(+0x21419c) [0xaaaae38d819c] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(consider_publishable_server+0x5c) [0xaaaae377099c] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(router_rebuild_descriptor+0x90) [0xaaaae3770588] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(router_build_fresh_descriptor+0x44) [0xaaaae377016c] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(+0xabaa0) [0xaaaae376faa0] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(relay_addr_learn_from_dirauth+0x1a8) [0xaaaae38d6bb0] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(tor_bug_occurred_+0x164) [0xaaaae37c15dc] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: /usr/bin/tor(log_backtrace_impl+0x68) [0xaaaae37b5fc0] (on Tor 0.4.5.6 ) x 09:30:50 [WARN] Bug: Tor 0.4.5.6: Non-fatal assertion !(!ei) failed in relay_addr_learn_from_dirauth at ../src/feature/relay/relay_find_addr.c:235. Stack trace: (on Tor 0.4.5.6 ) x 09:30:50 [WARN] tor_bug_occurred_(): Bug: ../src/feature/relay/relay_find_addr.c:235: relay_addr_learn_from_dirauth: Non-fatal assertion !(!ei) failed. (on Tor 0.4.5.6 ) x 09:30:50 [NOTICE] Unable to find IPv4 address for ORPort 443. You might want to specify IPv4Only to it or set an explicit address or set Address. x 09:30:50 [NOTICE] Opened Control listener connection (ready) on /run/tor/control qj 09:30:50 [NOTICE] Opening Control listener on /run/tor/control

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Relay metrics - chart never populates
by marsbanks 27 Feb '21

27 Feb '21

Does anyone know why I never see any data in the chart showing the number of clients using my bridge over time? https://metrics.torproject.org/rs.html#details/A675511F2F8EDD6974C3C093B8F3… I'm just concerned I haven't configured something correctly. Thanks. Sent with [ProtonMail](https://protonmail.com) Secure Email.

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current requirements for Fast and HSDir flags
by Scott Bennett 26 Feb '21

26 Feb '21

What are the current requirements to get an HSDir flag assigned to a relay? MYCROFTsOtherChild has, at last heartbeat message, been up for 35 days and 7 hours. To the best of my knowledge, it has not had an HSDir flag in the consensus at any time since it was last started more than a month ago. What are the current requirements to get a Fast flag assigned to a relay? MYCROFTsOtherChild often runs busily at 330 KB/s to 350 KB/s. Sometimes since it was last started over a month ago it has had a Fast flag in the consensus, and at other times it has not. The Fast flag seems to come and go like the wayward breezes. The Bandwidth= value in the consensus entry for MYCROFTsOtherChild has varied from somewhere in the 30s to the 110s, AFAI have seen, but is always subject to the delayed effects of the presence or absence of the Fast flag, of course, and prior to the currently running instance has also been subject to the presence or absence of the HSDir flag. The authorities have seemed to be acting more or less at random when assigning flags for the consensus for many months. Does the tor project envision any timeline for a return to rational, predictable behavior on the part of the authorities? Scott Bennett, Comm. ASMELG, CFIAG ********************************************************************** * Internet: bennett at sdf.org *xor* bennett at freeshell.org * *--------------------------------------------------------------------* * "A well regulated and disciplined militia, is at all times a good * * objection to the introduction of that bane of all free governments * * -- a standing army." * * -- Gov. John Hancock, New York Journal, 28 January 1790 * **********************************************************************

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Re: [tor-relays] IPv6
by Dr Gerard Bulger 25 Feb '21

25 Feb '21

Thinking of IPv6: How far has the team got in implementing IPv6 only OR port facility ? Currently you can only run tor relay of any sort if there is open IPv4 OR port to the internet. This is getting a bit quaint. I am sure I am not alone in having much wasted bandwidth that could be put to good Tor use but they are only accessible via IPv6, while they can exit of course IPv4 and IPv6 I realise that so far, despite IPv6 being open on my main exit for some years, there is still little IPv6 traffic, but that might suddenly change. Gerry From: tor-relays <tor-relays-bounces(a)lists.torproject.org> On Behalf Of Onion Operator Sent: 24 February 2021 10:08 To: tor-relays(a)lists.torproject.org Subject: [tor-relays] IPv6 auto-discovery vs. privacy extensions Saluton, My relay started to log this message since 0.4.5.5: Auto-discovered IPv6 address [...]:443 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] I think it started with the introduction of IPv6 auto-discovery. The problem, as I understand it, is that my relay has IPv6 privacy extensions enabled and therefore the IPv6 detection logic gets fooled. Indeed the IPv6 I see in the logs is one of the temporary addresses used as client towards other relays. Relevant config is: ORPort 443 IPv4Only ORPort [...]:443 IPv6Only I added the IPv{4,6}Only options only in searching a solution to this problem, before 0.4.5.5 the IPv6 relay worked perfectly without. In reading the documentation of AddressDisableIPv6 I got the impression that if (any?) ORPort is configured with IPv4Only the IPv6 auto-discovery gets disabled but evidence does not support my understanding. Is it a bug? Any other way to disable IPv6 auto-discovery? -- flev

4 5

Stable flag and client load
by enrollado 22 Feb '21

22 Feb '21

I am running a bridge, realseven, fingerprint 10B5293C71793DC1E56A5B17434C0539F70FBB38. It's been up for 71 days and has yet to get the stable flag or more than 3 or 4 connected clients. Is there something misconfigured? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ No me preguntas nada, no te diré una mentira. Enrollado Sent with ProtonMail Secure Email.

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tor-relays February 2021