August 2012 - tor-relays - lists.torproject.org

Notice of disruption of service
by Dennis Ljungmark 17 Aug '12

17 Aug '12

Hi all, I'm sad to say that I've been forced to disable three of our six relays, and reduce the others to minimal transfer speeds. We are currently being exhorted by our ISP, Bahnhof for a huge amount of money due to "excessive traffic" in order to sign us up on a new contract. This should serve as a warning call for people who are using or considering to use Bahnhof. Contact take(a)deklomp.se for more information about the case. The affected nodes are: ( Reduced speed ) depth 9EDB9965625A06F41D84581BF66CAF7D79919DC4 vandalise 8D3E65A90F455E77DEFAA9ACEAFD7392221E2C9C deklomp1 0A9CB1B43C780634B80390A9093C7490CB503880 ( Offline until the issues are resolved ) deklomp2 EFA394DD66A8147AAEF3604B37CBF77DE2C7D895 deklomp3 FB5BECE11DDCE8444CB2EB0A41303DBB7093EA7A deklomp4 2403121E35A830A7131C388EB643915F06842FB4 Regards, D.S. "Spider" Ljungmark

2 2

Help the Tor Project by running a fast unpublished bridge
by Roger Dingledine 16 Aug '12

16 Aug '12

Hi folks, In addition to the "get many fast exit relays" plan, that same funder (Voice of America) wants us to run a pile of fast stable unpublished bridges. We'll give the bridge addresses out manually to their target users over the coming months. The constraints are: * 100mbit+ connectivity, though in practice I expect they will spend most of their time doing far less than that. * No more than 2 bridges per /24. If you're running fast (100mbit+) exits (which is more important), exits on that /24 count toward this 2. * No more than 7 bridges total per data center. If you could set up 1 (or 2, or 20) and send me the address(es) privately, that would be grand. We do have some funding for this, but I'm hoping that we can get enough volunteers so we can put the money toward more fast exits and better QA and build automation for the Tor bundles. So if you have good connectivity but can't run an exit, this is a great way to contribute. The torrc lines we want include: ORPort 443 # or whichever port you like BridgeRelay 1 PublishServerDescriptor 0 RelayBandwidthRate 11875 KB # or more RelayBandwidthBurst 12500 KB # or more If you have 3+ IP addresses and want to get fancy, you might set OutboundBindAddress to a different IP address than you tell me, to avoid some of the bridge enumeration attacks listed at https://blog.torproject.org/blog/research-problems-ten-ways-discover-tor-br… Later I might ask you to set up some sort of server-side pluggable transport like obfsproxy, but there's no rush on that. Long-term, "get a bunch of fast bridges on individual static IP addresses" is not a very good plan. Instead, we plan to focus on borrowing whole netblocks from ISPs and other people who aren't using them, and redirecting the addresses en masse into a bridge. You can start playing around with this idea by using an iptables rule rather than a bridge: /sbin/iptables -t nat -A PREROUTING -p tcp -d 18.244.0.114 --dport 80 -j DNAT --to-destination 128.31.0.34:9032 if the bridge listens on 128.31.0.34:9032 and you want me to advertise the address 18.244.0.114:80. Let me know if you have any questions or I can help clarify anything. Thanks! --Roger

9 19

Exit Port Usage Statistics for "Allow all" nodes
by Moritz Bartl 15 Aug '12

15 Aug '12

Hi, At torservers.net, we run some large exit relays with an "allow all except port 25" policy. These are statistics from ARM showing exit port statistics of a fast exit running for seven hours at 30-40 MB/s: 443 HTTPS 17650 (%55) 80 HTTP 10625 (%33) 8344 739 (%2) 8333 84 51413 45 6881 Torrent 38 8337 29 993 IMAPS 23 45682 18 182 16 9001 16 4662 eMule 14 4661 12 -- Moritz Bartl https://www.torservers.net/

4 4

Using aes-in in Tor
by tor-admin 15 Aug '12

15 Aug '12

Hi, I am struggling setting up aes-in support with Ubuntu 12.04 LTS. I enabled aes in bios. cat /proc/cpuinfo shows the aes flag. #lsmod |grep aes aesni_intel 55664 0 cryptd 20530 1 aesni_intel aes_x86_64 17208 1 aesni_intel shows that the module is loaded. But #openssl engine (rsax) RSAX engine support (dynamic) Dynamic engine loading support shows not the aes engine. My openssl version is #openssl version OpenSSL 1.0.1 14 Mar 2012 Can someone give me a hint what I am doing wrong. Regards, Torland

3 4

Unnamed flag
by kupo＠damnfbi.tk 15 Aug '12

15 Aug '12

Can anyone explain how to get the Unnamed flag for my node changed over to Named? -kupo

4 3

Re: [tor-relays] Call for discussion: turning funding into more exit relays
by Martin Algö 15 Aug '12

15 Aug '12

Hi Roger, Thanks for your answer :) It's funny that you mention dfri.se, because they e-mailed me (and all swedish relay operators i believe) yesterday and I'm lurking in their IRC channel (and #tor) as I write this. I also managed to join the tor-relays list, so I've had a lot to read lately. I'm CC'ing this to them as well, so let's see if it gets to where it's supposed to. :) Cheers! //Martin 2012/8/14 Roger Dingledine <arma(a)mit.edu> > (Adding the tor-assistants cc back in -- I'm not so good at handling > mail to me directly, and tor-assistants is a closed list of other Tor > developers, so hopefully it isn't too impolite to add it.) > > On Tue, Jul 24, 2012 at 12:42:03PM +0200, Martin Algö wrote: > > Hello Roger, > > > > My answers first: > > > > - What do you currently pay for hosting/bandwidth, and how much bandwidth > > do you get for that? > > I'm running my relay from home. I have a 100Mbit connection and for that > i > > pay roughly $65 USD (450 SEK). > > > > - Is it a stable hosting situation? For example, how do they handle > > abuse complaints so far? > > So far I've been running my relay for about 18 months. The Tor server > uses > > a total of about 50Mbit constantly in both directions (I limited it > because > > I want some bandwidth for myself as well) and I have not heard a peep > from > > my ISP. It should be noted that my ISP (Bahnhof, Sweden) have been known > > for engaging in discussions about privacy in general and trying to > protect > > their users from things like ACTA/IPRED. They even supply their own > > anonymity VPN service. > > I tried contacting them once to talk about Tor, but whoever at helpdesk > > that got my email didn't know what I was talking about so I gave that up, > > thinking that I shouldnt rock the boat unless necessary. :) > > Great. I wish there were more people like you in Sweden. :) > > > - Is your hosting situation one where it could make sense for us to > > reimburse your bandwidth costs? (Some people have a deal through their > > employer, friend, etc where they don't pay for hosting.) > > Yes. In my case, I use half my bandwidth and so it would make sense to > pay > > me half my connection fee. Something that I would like much more though, > > would be a promise of economic assistance in case of juridical problems. > > The way i see it, I don't give any money to charity, such as Red Cross > etc. > > but I contribute bandwidth for a value of $30-35 every month to help > > anonymity and uncensored access to the internet for user that need it. > > (Along with users that use it for bad things as well, but that is a > > tradeoff I'm willing to make for now.) > > Good idea. Do you know about dfri.se? They are running some fast exit > relays in Sweden in an organized way. I bet they could help with the > legal side. I agree that it would be great to have some equivalent of the > Tor Legal FAQ written with Sweden in mind. I'm cc'ing Linus (from dfri) > in case he has any thoughts here. > > > relay if you didn't have to pay for it? > > This is an interesting question! Maybe I could buy a VPS somewhere? I'm > the > > local "IT guy" at my office so I might be able to buy a separate > connection > > there and even get some cheap hardware. This defenitely could require > some > > thinking on my part. > > Let us know if anything comes to mind, and what we can do to help. > > > - What else should we be asking here? :) > > What do the relay operators want? :) > > As stated above, for me it would mean much more to have some legal help > to > > fall back on if (when) shit hits the fan. I'm not sure, but I'm guessing > > that many would-be high speed relay operators don't run relays because of > > possible legal imlications. > > Right. Do you know good Swedish lawyers who might be able to help > clarify how the laws there work? > > > I would love to join the discussion on the tor-relays list. I already > > registered, but I never got around to using any mailing lists before, so > > I'm not sure how to respond to your thread without breaking anything. > Help > > a n00b will you? :) > > Happy to help. I'd say just send the mail and see what happens. If > you start with "I run a fast exit relay, and", I expect people will be > very friendly. > > Thanks! > --Roger > >

2 1

Sizing, Pricing, Effect
by Dennis Ljungmark 06 Aug '12

06 Aug '12

Hi! [Hypothetical part below] We have been involved with our ISP and there may ( discussions will have to wait until after summer vacation is over when we can find real numbers and answers) but it looks as if it'd cost us ~800€ / month to go from ~1GBit to 10GBit connection. If funding was available, this would be 9.5 GBit dedicated to Tor as Exit node + relays depending on what needs people have. [End hypothetical] Even without funding, we are still looking at transforming (some) of our existing relay nodes into Exit nodes, and there's a few practical questions here. Would you rather have several smaller ones, spread out via DHCP allocated ranges, or is it preferrable to have one or a handful of "larger" exit nodes? Regards, D.S. Ljungmark

1 0

tcmalloc in FreeBSD
by Jordi Espasa Clofent 06 Aug '12

06 Aug '12

Hi all, From time to time my tor node (minibofh) stopped to work properly; since it's a tiny FreeBSD VPS, the root origin was some CPU over-consumption. I'm taking some actions to fix it (more swap, freeing CPU from another services... etc). The FreeBSD tor port offers to you the tcmalloc compilation option, so I had some fun reading this interesting paper: http://goog-perftools.sourceforge.net/doc/tcmalloc.html I recompiled the tor port but just using the tcmalloc option. Actually, now I got the google-perftool package and, obviously, the tcmalloc library: mb# pkg_info | grep google google-perftools-1.8.3 Fast, multi-threaded malloc() and nifty performance analysi mb# pkg_info -L google-perftools-1.8.3 | grep malloc.so /usr/local/lib/libtcmalloc.so /usr/local/lib/libtcmalloc.so.2 But, when I'm checking which libraries the tor binary is using, I get: mb# ldd /usr/local/bin/tor /usr/local/bin/tor: libz.so.5 => /lib/libz.so.5 (0x281aa000) libm.so.5 => /lib/libm.so.5 (0x281bc000) libevent-2.0.so.6 => /usr/local/lib/event2/libevent-2.0.so.6 (0x2844e000) libssl.so.7 => /usr/local/lib/libssl.so.7 (0x28489000) libcrypto.so.7 => /usr/local/lib/libcrypto.so.7 (0x284d7000) libthr.so.3 => /lib/libthr.so.3 (0x281df000) libc.so.7 => /lib/libc.so.7 (0x28090000) So... I understand that the tor binary is actually NOT using the new tcmalloc library. Am I wrong? PS. I adding a CC to tor FreeBSD port mantainer.

2 2

Re: [tor-relays] [tor-assistants] Call for discussion: turning funding into more exit relays
by Andrew Beveridge 05 Aug '12

05 Aug '12

---------- Forwarded message ---------- From: TechFix LTD <andrew(a)techfixuk.com> Date: Wed, Aug 1, 2012 at 8:25 AM Subject: Re: [tor-assistants] Call for discussion: turning funding into more exit relays To: Roger Dingledine <arma(a)mit.edu> Cc: tor-relays(a)lists.torproject.org On Wed, Aug 1, 2012 at 5:03 AM, Roger Dingledine <arma(a)mit.edu> wrote: > Sounds like you should bump it up to 100mbit then. ;) > Heh, I've just done exactly that - well, I've raised the bandwidth limits in my torrc to values higher than what my ISP caps my connection at. Just to clarify though, is there any technical reason why it would be better practice to have a realistic configured limit (like 12.5MB) as the limit rather than something higher than that which I know will likely never actually be possible? I simply want to use all the bandwidth available. I'll monitor the websites I'm hosting from this server closely for a while and see if they are noticeably affected by this at all. They are hosted from a separate VM and I'm not sure how the OpenVZ host schedules packets going through the virtual network adapters, but I'm hoping that tor can run at maximum capacity most of the time while only adding perhaps a second or two of load time onto the websites. > You can see on http://atlas.torproject.org/#details/FA02311AF49EB663CA2685A8604C403A9E10E6… that there are periods where your rate limiting is bottlenecking traffic. I presume you're referring to the busy periods where the graph clips? Sure, but as my company pays for the server entirely, if it were to not function for its intended purpose (basic hosting of small-time client websites) I would have a problem. I was worried that allowing tor to use all my bandwidth would cause that, but I hadn't actually experimented with it to see - I'm doing that now! > > I definitely don't want Tor to be in the middle of the transactions -- if Tor pays the bills directly, that's too much like being the relay operator. One nice situation would be for you to produce receipts showing expenses, and then we reimburse those costs. It requires fronting a bit of money on your part, but that's part of saving the world, yes? :) > Ultimately, we're also going to want to look into reducing overhead on Tor's side from sending out money. If we have to write and mail 50 checks every month, that's going to waste a lot of somebody's time. Maybe that means Paypal is the way to go. Maybe it means we send some money in bulk to Zwiebelfreunde, and they do intra-Europe wire transfers to the other Europeans (though I admit maybe that just shifts the time-wasting). Lots of options there. What would be best for you? Good point. I guess the solution which seems logical to me would be a standing order from Tor into my company account for the amount mentioned above, with my OVH invoice emailed to you as justification. As the amount would not change from month to month, a standing order could be set up once and never require any more attention unless I got cut off by OVH. Presumably that would require a european bank account under Tor's control - I'm not sure about how your connection with the Wau Holland Foundation works, but are they perhaps able to help with european transfers? If that is too awkward, then sure, PayPal (or one of several other e-Payment systems) is a fairly easy way to go about it, with the loss of a few % of the payment amount. My business currently uses PayPal for all payments from US entities, simply because it is easy. > All of this said, don't go out and start spending money quite yet. We should figure out these logistics first. And Tor should get a bit more of a handle on what this diversity thing should mean. And I should get buy-in from other Tor people for my plans here. :) > --Roger > I'm going to try my best to run my current node as a full 100Mbit node from now on anyway, even if that means paying for more traffic. As soon as things are ready at your end, I'm ready to start a second identical exit as described in my previous mail. I'm going to try and start looking for other providers, but I don't want to reinvent the wheel - is https://trac.torproject.org/projects/tor/wiki/doc/GoodBadISPs kept up to date by many people here? Perhaps we could develop a slightly better system for tracking good/bad ISP experiences than a flat wiki page with countries? So my node has been running without any bandwidth restriction for a few days now, and I'm not noticing any critical speed problems from the websites I host. The latency drops significantly when the node is pushing traffic at max bandwidth, but that doesn't seem to be very often ( https://atlas.torproject.org/#details/FA02311AF49EB663CA2685A8604C403A9E10E… ). So, as it stands right now, I'm happy to run that node for free as I already have been. If the OVH manager decides I am very close to my initial 10TB traffic cap, I will have to limit the node again unless I can get some funding (£9-£18) for another 20TB each month. Out of curiosity, can anyone explain to me why my bandwidth /hasn't/ been maxed out the past few days? (at least, according to Atlas) -- * Andrew Beveridge, **Tor lurker / sympathizer / advocate, exit node maintainer.* Director / Computer Repair Technician @ TechFix LTD [ http://www.techfixuk.com] Freelance Web Developer @ [http://www.andrewbeveridge.co.uk] Tel/Fax: +44 (0) 1383269735 | * Email: tor(a)techfixuk.com <andrew(a)techfixuk.com> * * 5 Drum Road, Kelty, KY4 0DQ, Scotland *

1 0

Re: [tor-relays] task-6329 / tor relays stats patch
by Karsten Loesing 03 Aug '12

03 Aug '12

Hi Michael, I'm cc'ing tor-relays for the discussion here, because I figured if you're okay with sharing the patch, you're probably also okay with a public discussion of it. :) On 7/21/12 4:19 PM, Michael Zeltner wrote: > Hi Karsten, > > On my way out, and I would otherwise forget but here you go, maybe you'd like > this. > > Best from Metalab/Vienna, > Michael Thanks for sending the patch! Most of it looks good, but I took out the --family-for-fp option which, I think, isn't entirely correct. This option looks for relays having the given fingerprint in their family line, but it doesn't cross-check if the given relay has those relays in its family line, too. The option also doesn't look at nicknames (of relays with the Named flag) in family lines, which means it might miss some family members. Oh, and it would be really cool to have a -F or --by-family option to aggregate by families. I wonder if we should do the whole family-calculating business inside Onionoo and add a family_number field which has the same number for relays in the same family. The script could then look up the family number of the given relay and display all relays with that family number. Would that make sense? Want to extend the script once Onionoo has such a field? Thanks! Karsten

2 4