tor-relays June 2015

tor-relays@lists.torproject.org

83 participants
72 discussions

Messages
by Adrian Soh 21 Jun '15

21 Jun '15

Is there a way to send out messages that all tor relays will display to other circuits? Or any mailing system where I could send out to lists and boards?

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Re: [tor-relays] Tor relay is restarting every minute
by teor 20 Jun '15

20 Jun '15

> Date: Fri, 19 Jun 2015 06:42:59 -0500 > From: Michael <mctor(a)biographiks.com> > Jun 19 06:10:34.000 [warn] The communication stream of managed proxy > '/usr/local/bin/obfsproxy' is 'closed'. Most probably the managed > proxy stopped running. This might be a bug of the managed proxy, a bug > of Tor, or a misconfiguration. Please enable logging on your managed > proxy and check the logs for errors. Please provide the obfsproxy logs. You might also find that the tor debug-level logs around the time of the interrupt are useful. > Jun 19 06:11:43.958 [warn] OpenSSL version from headers does not match > the version we're running with. If you get weird crashes, that might > be why. (Compiled with 1000105f: OpenSSL 1.0.1e 11 Feb 2013; running > with 1000106f: OpenSSL 1.0.1f 6 Jan 2014). > Jun 19 06:11:43.958 [notice] Tor v0.2.6.9 (git-145b2587d1269af4) > running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1f and Zlib > 1.2.8. Please run tor with the OpenSSL version it was compiled with, and see if that makes a difference. > Jun 19 06:10:28.722 [notice] We were compiled with headers from > version 2.0.19-stable of Libevent, but we're using a Libevent library > that says it's version 2.0.21-stable. Please try using the same Libevent version tor was compiled with, and seeing if that makes a difference. You might also want to consider the following: tor is shutting down because it's receiving an interrupt signal. Which interrupt is it receiving? What is sending the interrupt signal to tor? Potential options are cron, a memory or server watchdog process, a rogue process, or perhaps a hardware fault. obfsproxy isn't running. Why does the obfsproxy process not start up/not keep running/shut down? Did you do anything else to your server around the time of the move? Upgrade software? Drop it? (I only ask because a hardware fault can trigger certain kinds of interrupts.) Does AT&T block certain types of connections? teor teor2345 at gmail dot com pgp 0xABFED1AC https://gist.github.com/teor2345/d033b8ce0a99adbc89c5 teor at blah dot im OTR D5BE4EC2 255D7585 F3874930 DB130265 7C9EBBC7

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BWAUTH weightings too volatile. . ."twitchy"
by starlight.2015q2＠binnacle.cx 19 Jun '15

19 Jun '15

I'm back to complain further about erratic bandwidth authority behavior, previously [tor-relays] BWauth kookiness https://lists.torproject.org/pipermail/tor-relays/2015-May/007039.html Allowing that BWauths are in a bit of flux, with tor26 replaced by maatuska and moria1 dropping the GuardFraction calculation, the bandwidth calculations evidence wildly erratic swings. Specifically my relay, which is perfectly stable, reliable, fast (9.375 Mbyte/sec) has been assigned a jaggedly random series of consensus weights. https://atlas.torproject.org/#details/4F0DB7E687FC7C0AE55C8F243DA8B0EB27FBF… earlier, fairly sane *gabelmoo Bandwidth=7701 Measured=9960 tor26 Bandwidth=7701 Measured=9340 moria1 Bandwidth=7701 Measured=18000 GuardFraction=66 longclaw Bandwidth=7701 Measured=12800 later, bit high, nutty gablemoo Bandwidth=9375 Measured=17100 moria1 Bandwidth=9375 Measured=77900 GuardFraction=75 *longclaw Bandwidth=9375 Measured=23000 now, sane but undervalued gablemoo Bandwidth=8925 Measured=14900 maatuska Bandwidth=8925 Measured=17200 moria1 Bandwidth=8925 Measured=5330 *longclaw Bandwidth=8925 Measured=7440 moria1 here is downright schizophrenic but other BWauths regularly double and halve the bandwidth value they assign. Graph shows it a more vividly. What the graphs and numbers do not show is that the effective difference between the consensus values of ~7000 and ~23000 is staggering. At the low end of this range the relay shows roughly 2500 active circuits and a average load factor of about 20% of actual bandwidth, while an assignment of 23000 results in almost 8000 circuits and a load factor of more like 50% (both per Blutemagie.de). My point is that BWauths should not be arbitrarily flipping stable, well run relays from the top to the bottom of this steeply sloped sweet-spot of the weighting curve. Perhaps the sweet-spot range has moved over the last couple of years as the price of bandwidth has dropped and faster connections become more prevalent, and this has been overlooked in the algorithm. Regardless, it seems BWauth measurement should be more nuanced in this particular range, such that relays are not slammed constantly between "rather popular" and a "bit boring" irrespective of their actual available capacity. One reason this vexes is that I would like to see how well the relay runs with Address Sanitizer active. ASAN provides obvious benefits w/r/t security, but entails a performance trade-off. With the BWauths throwing darts, eyes closed, when choosing weighting, it's impossible to gauge the performance impact of various adjustments. In the bigger picture view, erratic BWauth weighting can't be adding clarity to the performance, capacity and utilization situation.

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Tor relay is restarting every minute
by Michael 19 Jun '15

19 Jun '15

My Tor relay interrupts and restarts every minute (without my involvement), so it isn't usable by anyone. Nothing new in my obfsproxy log. My relay was running fine until I moved and changed to a new ISP (AT&T). Jun 19 06:10:28.717 [notice] Tor v0.2.6.9 (git-145b2587d1269af4) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1f and Zlib 1.2.8. Jun 19 06:10:28.717 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Jun 19 06:10:28.717 [notice] Read configuration file "/usr/share/tor/tor-service-defaults-torrc". Jun 19 06:10:28.717 [notice] Read configuration file "/etc/tor/torrc". Jun 19 06:10:28.722 [notice] Based on detected system memory, MaxMemInQueues is set to 2048 MB. You can override this by setting MaxMemInQueues by hand. Jun 19 06:10:28.722 [notice] We were compiled with headers from version 2.0.19-stable of Libevent, but we're using a Libevent library that says it's version 2.0.21-stable. Jun 19 06:10:28.722 [notice] Opening Control listener on 127.0.0.1:9051 Jun 19 06:10:28.723 [notice] Opening Control listener on /var/run/tor/control Jun 19 06:10:28.723 [notice] Opening OR listener on 0.0.0.0:9001 Jun 19 06:10:28.723 [notice] Opening Extended OR listener on 127.0.0.1:0 Jun 19 06:10:28.723 [notice] Extended OR listener listening on port 55831. Jun 19 06:10:28.000 [notice] Parsing GEOIP IPv4 file /usr/share/tor/geoip. Jun 19 06:10:28.000 [notice] Parsing GEOIP IPv6 file /usr/share/tor/geoip6. Jun 19 06:10:28.000 [notice] Configured to measure statistics. Look for the *-stats files that will first be written to the data directory in 24 hours from now. Jun 19 06:10:29.000 [notice] Your Tor server's identity key fingerprint is [REDACTED] Jun 19 06:10:29.000 [notice] Your Tor bridge's hashed identity key fingerprint is [REDACTED] Jun 19 06:10:29.000 [notice] Bootstrapped 0%: Starting Jun 19 06:10:33.000 [notice] Bootstrapped 80%: Connecting to the Tor network Jun 19 06:10:34.000 [warn] The communication stream of managed proxy '/usr/local/bin/obfsproxy' is 'closed'. Most probably the managed proxy stopped running. This might be a bug of the managed proxy, a bug of Tor, or a misconfiguration. Please enable logging on your managed proxy and check the logs for errors. Jun 19 06:10:34.000 [notice] Failed to terminate process with PID '13164' ('Success'). Jun 19 06:10:34.000 [notice] Bootstrapped 85%: Finishing handshake with first hop Jun 19 06:10:35.000 [notice] Bootstrapped 90%: Establishing a Tor circuit Jun 19 06:10:36.000 [notice] Tor has successfully opened a circuit. Looks like client functionality is working. Jun 19 06:10:36.000 [notice] Bootstrapped 100%: Done Jun 19 06:11:13.000 [notice] Interrupt: we have stopped accepting new connections, and will shut down in 30 seconds. Interrupt again to exit now. Jun 19 06:11:43.000 [notice] Clean shutdown finished. Exiting. Jun 19 06:11:43.000 [notice] Tor 0.2.6.9 (git-145b2587d1269af4) opening log file. Jun 19 06:11:43.958 [warn] OpenSSL version from headers does not match the version we're running with. If you get weird crashes, that might be why. (Compiled with 1000105f: OpenSSL 1.0.1e 11 Feb 2013; running with 1000106f: OpenSSL 1.0.1f 6 Jan 2014). Jun 19 06:11:43.958 [notice] Tor v0.2.6.9 (git-145b2587d1269af4) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1f and Zlib 1.2.8.

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Installing Tor-ramdisk
by eldorado 17 Jun '15

17 Jun '15

Installing Tor-ramdisk I have question about installing Tor-ramdisk on Dedicated server in hetzner datacenter. I want install iso file without using USB and DVD . i followed this link[1] . My iso file is in my VPS that LARA could access to iso via SAMBA/CIFS . LARA shows me the iso file attached but after running KVM and press F11 the boot menu have my hard disks not "PepperC Virtual Disc 1 0.01" in boot menu . How i can mount Tor-ramdisk with KVM . i don't want pay € 21.01 for using USB stick/DVD . [1] http://wiki.hetzner.de/index.php/LARA/en

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Questions about GUI monitor
by nks nks 17 Jun '15

17 Jun '15

Dear Sir/Madam: My system is Debian 32bit, Tor non-exit bridge. 1. For Debian, is there any pure Tor service monitoring and analyzing software for the local machine (not the entire Tor network), with/without a GUI ? 2. Does "Vidalia" really end developing? May I ask why? May I install the "Vidalia" which is still could be found in the Debian apt system? 3. https://www.torproject.org/projects/projects.html.en "orlib" the link is dead. 4. About "Tor2web", are there any clearer figures and docs which could explain the security differences between "Tor" and "Tow2web" ? Especially for the client. Thank you.

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Exit relay is apparently being used to attack other servers
by trillium 16 Jun '15

16 Jun '15

Hello, I’m running an exit relay (fingerprint: 5793CB9E1F5BAD3D5DA6C4158E16067D80CD8A2E) on a Linode VPS right now, and so far they’ve been really fantastic with dealing with a couple of DMCA notices that were sent to them. However, in the last week, I received notice from them that my server is attacking multiple sites around the web. Their suggestion was to go through my logs and remove the offending user, which is obviously unhelpful advice as I don’t keep any logs on my relay’s users. I’d like to keep running the exit relay, but I’m not really sure how to best go about mitigating these sorts of threats and don’t want Linode to shut down the entire server. Any suggestions are very much welcomed. Thanks, trillium

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Encryption in French servers
by Javi 15 Jun '15

15 Jun '15

I know in France it's illegal to encrypt data so if I run a tor relay in a French server I would have any problem? Thanks.

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Re: [tor-relays] Exit relay is apparently being used to attack other servers
by spiros_spiros＠freemail.gr 13 Jun '15

13 Jun '15

Hi Trillium, It is always sad when Tor is used to hack/DoS/compromise servers. As operator of an Exit Node unfortunately you will see as well as the DMCA notice the hacking/abuse/spamming/botnet alerts from some service provider, also you will get notification that the node is added to this blacklist and that spammer list. My advice is to work very closely with your Exit Node datacentre and make them know that you respond quickly to abuse emails (even the annoying automatic ones) with polite message to tell them you have a Tor Exit and cannot provide details of traffic source or realistically block individual user or IP. If the datacentre is friendly you will hopefully not be shut down or account closed. If you get paranoid about one particular provider, or they harass you with email threats/notifications you could use iptables or ipfw to block individual host, or close the port to the Exit Node in your torrc. It would be better to explain situation if you are in contact with them and go from there. In my experience when I email complaining party to explain I run Tor relays I almost never get a response but sometimes they just block the Exit Node IP on their firewall which is fine. If really paranoid, consider moving to provider that does not require scan of government ID or passport, pay with BitCoin if possible, don't provide real house address and don't log in to server from your home IP. As others have written before me, Linode is not great for Tor friendliness. S On 13 Jun 2015, at 19:03, trillium <trillium(a)riseup.net> wrote: Hello, I’m running an exit relay (fingerprint: 5793CB9E1F5BAD3D5DA6C4158E16067D80CD8A2E) on a Linode VPS right now, and so far they’ve been really fantastic with dealing with a couple of DMCA notices that were sent to them. However, in the last week, I received notice from them that my server is attacking multiple sites around the web. Their suggestion was to go through my logs and remove the offending user, which is obviously unhelpful advice as I don’t keep any logs on my relay’s users. I’d like to keep running the exit relay, but I’m not really sure how to best go about mitigating these sorts of threats and don’t want Linode to shut down the entire server. Any suggestions are very much welcomed. Thanks, trillium _______________________________________________ tor-relays mailing list tor-relays(a)lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays

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Re: [tor-relays] Recommendation: Upgrade your OpenSSL! (Nick Mathewson)
by teor 12 Jun '15

12 Jun '15

> Date: Thu, 11 Jun 2015 14:30:35 -0400 > From: Nick Mathewson <nickm(a)torproject.org> > > Hi, relay operators! > > There have been a series of new openssl releases today: 0.9.8zg, > 1.0.0s, 1.0.1n, and 1.0.2b. > > They fix a set of security issues described in this announcement: > https://www.openssl.org/news/secadv_20150611.txt > > Since some of these issues could allow a remote denial-of-service > attack, I would suggest that everybody should upgrade as OpenSSL > packages become available for your operating systems. If you build > OpenSSL from source, now's a good time to rebuild. You probably don't > need to run in circles freaking out, or anything -- just upgrade when > you can. > > Also, if you can possibly avoid it, it would be a good idea to stop > using the OpenSSL 0.9.8 series entirely. It's old and crufty and is > missing many security improvements in later versions. OpenSSL 0.9.8 > will not be supported in Tor 0.2.7.2-alpha or later. Please also note that OpenSSL versions 0.9.8 and 1.0.0 are becoming unsupported at the end of 2015: "As per our previous announcements and our Release Strategy (https://www.openssl.org/about/releasestrat.html), support for OpenSSL versions 1.0.0 and 0.9.8 will cease on 31st December 2015. No security updates for these releases will be provided after that date. Users of these releases are advised to upgrade." See the second-last section in https://www.openssl.org/news/secadv_20150611.txt teor teor2345 at gmail dot com pgp 0xABFED1AC https://gist.github.com/teor2345/d033b8ce0a99adbc89c5 teor at blah dot im OTR D5BE4EC2 255D7585 F3874930 DB130265 7C9EBBC7

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tor-relays June 2015