- tor-relays - lists.torproject.org

Advisory: remote DoS when using Tor with recent OpenSSL versions built with the "no-ssl3" option.
by Nick Mathewson 21 Oct '14

21 Oct '14

Hello, relay operators! There's one important bugfix in the 0.2.5.9-rc release that relay operators should know about. If you have a version of OpenSSL that came out last week (like 1.0.1j, 1.0.0, ) and if your version of openssl is built with the "no-ssl3" flag, then it's possible to crash your Tor relay remotely if you don't upgrade to 0.2.5.9-rc or to 0.2.4.25 (when that's out). This appears to be an OpenSSL bug. The Tor releases in question contain a workaround for it. To tell if your version of openssl was built with 'no-ssl3': run "openssl s_client -ssl3 -connect www.torproject.org:443". If it gives you an output beginning with something like: CONNECTED(00000003) 140632971298688:error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure:s3_pkt.c:1257:SSL alert number 40 140632971298688:error:1409E0E5:SSL routines:SSL3_WRITE_BYTES:ssl handshake failure:s3_pkt.c:596: then you're fine and you don't need to upgrade Tor on your relay. But if it says something that starts like: unknown option -ssl3 usage: s_client args then you need to upgrade your Tor. === Some questions and answers: Q: Does this affect clients? A: No. Only relays. Q: Does this affect me if I'm running a version of OpenSSL other than 1.0.1j, 1.0.0o, or 0.9.8zc? A: No. Only those versions. Q: Does this affect me if I'm running a version of OpenSSL configured without the "no-ssl3" option? A: No. Only versions that were built with the "no-ssl3" option are affected. Q: Does the openssl team know? A: Yes. Have a look at this thread. http://marc.info/?l=openssl-dev&m=141357408522028&w=2 . Also, before I saw that thread, I informed them the other day. Q: Does this affect Tor packages? A: I don't think that we shipped any packages where we used the "no-ssl3" flag to diable ssl3. So only if you're using OpenSSL from another source (say, your operating system) will you be affected. Q: What can I do to remediate this problem? A: You can upgrade to the most recent Tor, or you can use a version of OpenSSL built without the "no-ssl3" flag. Downgrading your OpenSSL is not recommended. Q: What is the potential impact of this bug? A: If a relay is affected by this bug, anybody can make the relay exit remotely. It does not enable any data leaks or remote code execution. Still, the ability to selectively disable relays might enable a sophisticated attacker to do some kinds of traffic analysis more efficiently. So, fix your relay if it's affected. Q: Should we run in circles and freak out? A: Not this time. We should just make sure we fix affected relays. Q: Hey, Nick, you didn't explain this properly! A: Please send a follow-up message that explains it better. :) best wishes, -- Nick

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tor-relays on Nokia N900
by Franklin 20 Oct '14

20 Oct '14

Hi How to set tor-relays on Nokia N900?

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Anonbox Project
by Sven Reissmann 18 Oct '14

18 Oct '14

Hi there, I recently read about the anonbox project [1], a small hardware-router, which allows end-users to connect their whole LAN to the Tor network. The project is on kickstarter at the moment [2]. Has there already been a discussion on how this might affect the performance of the Tor network? Regards, Sven. [1] http://anonabox.com [2] https://www.kickstarter.com/projects/augustgermar/anonabox-a-tor-hardware-r… -- PGP Key: https://0x80.io/pub/files/key.asc PGP Key Fingerprint: 2DF2 79CD 48DD 4D38 F0B6 7557 2E68 D557 49AA 1D99 Note: I'll be transitioning away from this key in the near future.

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Re: [tor-relays] Few questions about relaying
by teor 17 Oct '14

17 Oct '14

Unless you have a specific need to debug tor (hint: you don't), you should remove this line to improve security: DisableDebuggerAttachment 0 And please consider adjusting these lines rather than removing them: RelayBandwidthBurst 25 MBytes RelayBandwidthRate 20 MBytes We've found that relays perform best when given a rate slightly under the capacity of the link. teor pgp 0xABFED1AC hkp://pgp.mit.edu/ https://gist.github.com/teor2345/d033b8ce0a99adbc89c5 http://0bin.net/paste/Mu92kPyphK0bqmbA#Zvt3gzMrSCAwDN6GKsUk7Q8G-eG+Y+BLpe7w… On 12 Oct 2014, at 01:22 , tor-relays-request(a)lists.torproject.org wrote: > Date: Sat, 11 Oct 2014 17:21:51 +0300 > From: s7r <s7r(a)sky-ip.org> > To: tor-relays(a)lists.torproject.org > Subject: Re: [tor-relays] Few questions about relaying > Message-ID: <54393CFF.5030903(a)sky-ip.org> > Content-Type: text/plain; charset=ISO-8859-1 > > Signed PGP part > RelayBandwidthBurst 15 MBytes > RelayBandwidthRate 3 MBytes > ContactInfo QuebecFibe(a)gmail.com - 200Mb dedicated relay > ControlPort 9052 > CookieAuthentication 1 > DataDirectory /home/blaise/.arm/tor_data > DirPort 9030 > DisableDebuggerAttachment 0 > ExitPolicy reject *:* > Log notice file /home/blaise/.arm/tor_log > Nickname QuebecFibe > ORPort 27645 > RunAsDaemon 1 > > > Use this. You are using the latest Tor? > > > On 10/11/2014 5:11 PM, Blaise Gagnon wrote: > > http://pastebin.com/DQ4k7Fzz > > > > 2014-10-11 10:06 GMT-04:00 s7r <s7r(a)sky-ip.org > > <mailto:s7r@sky-ip.org>>: > > > > Can you please copy/paste your entire torrc to a pastebin and > > provide us the link? > > > > It is hibernating only if you use accounting. Provide us your > > entire complete torrc and we will correct it for you if you don't > > have traffic limits on your server. > > > > On 10/11/2014 4:54 PM, Blaise Gagnon wrote: > >> after a few hours, still hibernating, and still wondering why I > >> lost Stable, Guard and Named all at the same time (see atlas > >> graph)... weird. > > > >> 2014-10-11 6:03 GMT-04:00 Blaise Gagnon <quebecfibe(a)gmail.com > >> <mailto:quebecfibe@gmail.com> <mailto:quebecfibe@gmail.com > >> <mailto:quebecfibe@gmail.com>>>: > > > >> no reason for my node to be hibernating, no caps... > > > >> 2014-10-11 3:31 GMT-04:00 Lunar <lunar(a)torproject.org > >> <mailto:lunar@torproject.org> <mailto:lunar@torproject.org > >> <mailto:lunar@torproject.org>>>: > > > >> Blaise Gagnon: > >>> and ... what is "hibernating" ? > > > >> See AccountingMax and related options in tor manpage: > > > >> AccountingMax N > >> bytes|KBytes|MBytes|GBytes|KBits|MBits|GBits|TBytes Never send > >> more than the specified number of bytes in a given accounting > >> period, or receive more than that number in the period. For > >> example, with AccountingMax set to 1 GByte, a server could send > >> 900 MBytes and receive 800 MBytes and continue running. It will > >> only hibernate once one of the two reaches 1 GByte. When the > >> number of bytes gets low, Tor will stop accepting new connections > >> and circuits. When the number of bytes is exhausted, Tor will > >> hibernate until some time in the next accounting period. To > >> prevent all servers from waking at the same time, Tor will also > >> wait until a random point in each period before waking up. If you > >> have bandwidth cost issues, enabling hibernation is preferable to > >> setting a low bandwidth, since it provides users with a > >> collection of fast servers that are up some of the time, which is > >> more useful than a set of slow servers that are always > >> "available". > > > >> -- Lunar <lunar(a)torproject.org <mailto:lunar@torproject.org> > > <mailto:lunar@torproject.org <mailto:lunar@torproject.org>>> > > > >> _______________________________________________ tor-relays > >> mailing list tor-relays(a)lists.torproject.org > >> <mailto:tor-relays@lists.torproject.org> > >> <mailto:tor-relays@lists.torproject.org > > <mailto:tor-relays@lists.torproject.org>> > >> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays > > > > > > > > > > > >> _______________________________________________ tor-relays > >> mailing list tor-relays(a)lists.torproject.org > >> <mailto:tor-relays@lists.torproject.org> > >> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays > > > > > > _______________________________________________ tor-relays mailing > > list tor-relays(a)lists.torproject.org > > <mailto:tor-relays@lists.torproject.org> > > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays > > > > > > > > > > _______________________________________________ tor-relays mailing > > list tor-relays(a)lists.torproject.org > > https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays > > > > -- > s7r > PGP Fingerprint: 7C36 9232 5ABD FB0B 3021 03F1 837F A52C 8126 5B11 > PGP Pubkey: http://www.sky-ip.org/s7r@sky-ip.org.asc >

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Unstable router
by humbletoruser＠Safe-mail.net 16 Oct '14

16 Oct '14

Hello guys, I'm hosting a tor relay at home. My router is a Fritz-Box (this one: http://avm.de/service/fritzbox/fritzbox-7362-sl/uebersicht/ ) and the internet connections is really unstable. Frequently the connection breaks. Not only to the internet, also the local network is down till the router reboots. Is there a better solution for routing a DSL connection? A better router or a way to replace the router with the computer running the tor node. Any hint is appreciated. Thanks in advance! Another question: If I'm acessing my side through a .onion address theres no need for ssl/https as the traffic is encrypted anyways, right?

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About TBB downloadings
by Lluís 16 Oct '14

16 Oct '14

In the web page here: https://www.torproject.org/download/download.html.en#warning advises us not to "... open documents downloaded through Tor while online" Many technical manuals and scientific papers are written in pdf format, and I usually read them. So my question is: Is it safe to download them with TBB first and then open them with, say, "Document Viewer" ? Where can I find more information about it ? Lluís, Spain

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Obfuscated bridges and tor-arm
by justaguy 16 Oct '14

16 Oct '14

Does the tor-arm tool display the used BW of the obfuscated bridge or only the normal non obfuscated bridge? -Justaguy

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About bug #13256: "torsocks 1.3 possibly leaks username"
by Pablo Castellano 16 Oct '14

16 Oct '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello! I reported this bug some weeks ago but I haven't received any answer: https://trac.torproject.org/projects/tor/ticket/13256 I'm bringing it here to discuss it and know your thoughts. Regards, Pablo. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUPxOMAAoJEHj0TzpGP5Gc/9MQAJF2wzKy5DEvKr90RJDSLphF /2HvBGFZyJDhusDKbwPPGujGqSpbv0f5RL2ZBZ7wFXt0TBo95q3LXiwpwux4jThl bn/smPKw6sLRiCs4/mNGlF17yxX35RrhXOiXtu5xk828zRT2qsE2ZaChH81Ynkml IAsidwdh6B3MzFa/vd1rXngoBJZNAoMn2WvVR7vZJAk9ttcCO8qVYocQje/M0QrR xVn1Aw3+Ao436KCdqu6yAjfgr7NLIwGEZI+Q19BNukuQLdOzydixdB9IAUDfXER6 XL0uPO2T6WgzdTGq8tqAc+x5CPkNeeNqRHa9Cx72gVIxdkBAtZfMlv3c1ulYfM0/ FexxuIlsmF4Ei7HsKWf/c7C0bir1wwJhWFrM8hpQHkpOyWAHQWFjaW0x/xuzU/03 Icxf9U/D92C24XmJJrPI4dIS1F2EYdoOWtrd62UacExeuwRhLb4D2FC2VamCjCYq SN9czti8MuS/Jmqq7vNI3wkcZzZ0x5r/ECYncHdC9P3MQN+JfbU5ei0bU0LOQNE/ sNRdERHymNcv5HHQC3NU+gGx4yf56GO9R6natZC78OrXwu2RroCGEjeMhq/pMe5R CG0eZHPN993pY9UdlMivsfrKnH0McZPSJ2b/NnyxLdYfK58s68hM14ypM4VVUrNT z7zgr/qYtLHzj0EWT9Y7 =D6IQ -----END PGP SIGNATURE-----

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Re: [tor-relays] Anonbox Project
by Torzilla 15 Oct '14

15 Oct '14

I have seen their website and it looks like someone is trying to sell this product though I didn't see a price tag yet. Looks dangerous. Possibly a honeypot. Thanks, Torzilla11 Sent from my Sony Xperia™ smartphone Thomas White <thomaswhite(a)riseup.net> wrote: >-----BEGIN PGP SIGNED MESSAGE----- >Hash: SHA1 > >Well the topic has come up several times in the last day or two on IRC >and generally the feeling is that it may be quite bad for the users of >the product, not necessarily the Tor network however. > >One thing that AnonBox does do is increase Tor network traffic - you >can see this as both good and bad since it adds load to exit operators >like myself which are already in short supply and diversity, but at >the same time adding traffic to the network makes it safer to use for >everyone. > >The real concern is the mismarketing and borderline fraud occuring by >assuming the simple use of a protocol or open source software (which I >note, the hardware is not actually open source at all). In addition, >the users of such a system are going to be leaving an enormous browser >fingerprint and their activities will be correlated so expectation of >reasonable privacy from this project is a misguided hope at best; at >worst very dangerous to life and limb of anyone who relies on Tor for >their life. > >I am personally hoping somebody high up in the Tor Project management >will openly condemn this atrocity and hopefully Kickstarter and the >funders will withdraw their funds before a whole load of people buy >into this "security as a tool" idea. > >- -T > >On 15/10/2014 12:15, Sven Reissmann wrote: >> Hi there, >> >> I recently read about the anonbox project [1], a small >> hardware-router, which allows end-users to connect their whole LAN >> to the Tor network. The project is on kickstarter at the moment >> [2]. >> >> Has there already been a discussion on how this might affect the >> performance of the Tor network? >> >> Regards, Sven. >> >> >> [1] http://anonabox.com [2] >> https://www.kickstarter.com/projects/augustgermar/anonabox-a-tor-hardware-r… >> >> >> >> >> _______________________________________________ tor-relays mailing >> list tor-relays(a)lists.torproject.org >> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays >> >-----BEGIN PGP SIGNATURE----- >Version: GnuPG v2.0.22 (MingW32) > >iQIcBAEBAgAGBQJUPmHuAAoJEE2uQiaesOsLAOMP/j8BHqO2yIHRV8Q7Ja3aYHrv >ppLrDbjvbkV9paqGR4X8Gz71PJyHXZoOse6JfBxOnZG+mmoS9elYoXDkKoz8y5Z3 >ot/cpoQdKLei+LvmRxQ5VHcwDXx6wb35+o7I5FnvMoyH2YTeqyfAmGnb5X7D3oa7 >H5rYF8n17ttfvqHvFt2tRuZKKyskJWRnjnpkmmAJSeZpmZnRf38JGhdknmoPMXg3 >5hwzh7E9xFSMM5NrCpXDYvRdZJMvQPWdDFOVUZvKMh/magJitfBZ2Lr7cpq2Vpep >bU8Xs4z/a92j+bm3lN1jzUEgoxs7BEtn/bG2ASRJp2BufOFW8+FCTuOJQPVV0iSa >BPtjoNGe1cwBin256ODF3GjcuzS0Vbql0oS3HyYyEgYEnDjXcw05sdd9tg9i1lqk >66M8h9/aQvZZX1qB4EPzweOYM10VX7mS2pGGl+00wGkGZvhZ4k5ixP/8kHQ7OqQh >d6lwg/ZWK+6wYx3ADCKCvfD5pCNMlf4AtWgam3eQpSPw1uJuw3/twKEvuQijfhRM >XyNu3GivErIpL1d9awm0tJdqcZYZsKw/RFKN9leHt8PhYTMcSp+MViPuFaPIcYh0 >CHwj36gQTqB3XxzdnyJyzigwQhpWePs+qcmc4S3mTq8ogZsnBMgS080XocOx1Jrp >zqZfg7sOGY+s3018nntK >=SX0h >-----END PGP SIGNATURE----- >_______________________________________________ >tor-relays mailing list >tor-relays(a)lists.torproject.org >https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays

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GoodBadISPs revamp?
by subkeys＠riseup.net 15 Oct '14

15 Oct '14

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 [cross-posted on tor-talk and tor-relays] i've found that the Tor GoodBadISPs list [1] is somewhat outdated on current hosts that allow Tor (exit) relays to be hosted. i'm trying to find a cheap host that allows exits to be operated from their services, and navigating the outdated list and finding an operator that isn't extremely expensive is time consuming (some entries go back to 2010!). should the community start a revamp project (or start a whole new list)? i'd be willing to donate my time to help get this started if need be. thanks. - ---- mikael ball 0xB1910271AE8587F4 @subkeys [1]: https://trac.torproject.org/projects/tor/wiki/doc/GoodBadISPs -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJUOyMfAAoJELGRAnGuhYf0BKIP/jW0D+wgMOMrYlFQ9k46fHTK g57tkqp6SAKPL/us6Zgf1tG3XIxUGcsQXTt9xrRwgpBAC1iEJtQcBGVutd6hCtYn s3ByxR1fhHa7LglDISueiDTsSx7/cu0cGykKbT7xxGSBLXint0tVxyis/GAznIue MoIlwCoFBO6rHsDU+aPyfLk0SjpYaDZ2tI3PKVplWO/NCW7UHiDeMONPfTXQxVQQ XYSl7Mp2AhmdatpU2a7ACXi1qWibFRlJqVji/Hp3wVpDYxGGIGxP1RG7vR+JvoqU wZ0g0s9JTRpNpjKfLlHGs8ZxF1XXFGXkpqYR9Ka1lAvkD50EFHbQshMKD6exGnfY xyNrEaleCTB+w3ww4YMPqRCzd3J5a/6+xdncBEitV5YzKh15aYD4VJk0/vlFVbED 950Zsh+6n242fwCAXRZi59rbmL3TRqkqNsM3Ihp8z6RyNSf5IwkFf/8TQXIFZ5xy ieNTtnFljinTDgScBjwSh0yvpQTuSL1doG8Uw5Gj3OAWVZWUnb/qrE6GGXY7cjHl 3KsPDr7/wMLF73kDc8TkcUPYcQkC3THXRB40qapSucB0utKZMfBWbczkZLu+JXxb aBLVqd9HKBhqyRsp5Y9yaCFYgWbIwssGYhgY+qi/vgr0y3aedP1A2Y0rhyyYUJAt wBRikkm58YQfotoN0o5H =YSqt -----END PGP SIGNATURE-----

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