August 2011 - tor-relays - lists.torproject.org

Setting up a "hidden" exit node
by Joel Hobson 09 Aug '11

09 Aug '11

Hi all, I'm an undergraduate student working as a research assistant for the summer. My current task is to figure out a way to measure delay caused by individual nodes (we want to replicate this paper: http://cis.poly.edu/~ross/papers/Tor.pdf <http://cis.poly.edu/%7Eross/papers/Tor.pdf>). It seems to me that the easiest way of accomplishing this would be to run an exit node and construct a two-hop circuit to it. OP ------> Node to be measured -------> Exit node Since the OP and exit node are under my control, I could measure the time it takes for any packets to reach the exit node from the OP. I want to be the only one who can use this exit node so I don't have to worry about getting approval from the school to run an exit node (could be time-consuming). I realize this is pretty far from any design goals the developers have, but is there some way of running a hidden exit node? One that doesn't appear on any directory server (PublishServerDescriptor 0 might work)****, but can still be used if you know its IP address? The Tor Control Protocol makes it easy enough to create a custom circuit (discussed here: http://thesprawl.org/memdump/?entry=8) but it won't accept IP addresses for nodes. I can put an IP in exitnodes in the torrc file, but exitnodes doesn't seem to have any effect, even when StrictExitNodes is set. Thanks Joel

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by 向梁 06 Aug '11

06 Aug '11

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Newbie Messed up Relay Setup
by flgcrz 05 Aug '11

05 Aug '11

Hello, Is this the right place to post if I'm having difficulties? I've done quite a bit of searching forums and things. I'm new to this and have been struggling a bit to get Tor and Vidalia working smoothly. I think I know what the problem is . I had my relay setup and working fine but Tor was not working. So I looked around a bit and I found this post on the Ubuntu forums and a useful guide to setting up Tor Vidalia and Polipo. I followed the instructions in that guide and finally Tor is working both when Vidalia boots and in my browser albeit with Torbutton as opposed to Foxyproxy (recommended in the guide). I thought this is great progress finally. But no I messed something up. In my enthusiasm I had copied the torrc from the guide without backing up my original and now my relay is no longer working. There are I believe 2 issues. The first I think is that the original references to my keys have been deleted. The second is I think something to do with the setup I have for ControlPort. I don't think its a firewall issue. I am running a firewall locally and have port forwarding setup on my wireless router for 9001 and 9030 Like I said I'm new to all this so I could be wrong. I also don't know a lot about encryption so I am hesitant to post the details of my logs on a public list. I've messed things up so if this is too much of a pain is there a way to just wipe out old keys and start a new relay from scratch? Thanks you in advance Best Kevin ---- Here is the post on Ubuntu Forums http://ubuntuforums.org/showthread.php?p=11117515#post11117515 Here are some of the details from from my logs ( minus the encyption stuff which I can post if those who know better think its ok to do so) Aug 04 18:38:10.018 [Info] resolve_my_address(): Guessed local hostname 'CRZ' resolves to a private IP address (127.0.0.1). Trying something else. Aug 04 18:38:10.019 [Info] resolve_my_address(): Interface IP address '192.168.1.130' is a private address too. Ignoring. Aug 04 18:38:10.023 [Info] resolve_my_address(): Address 'CRZ' resolves to private IP address '127.0.0.1'. Tor servers that use the default DirServers must have public IP addresses. Aug 04 18:38:10.023 [Info] router_pick_published_address(): Could not determine our address locally. Checking if directory headers provide any hints. Aug 04 18:38:10.024 [Info] resolve_my_address(): Guessed local hostname 'CRZ' resolves to a private IP address (127.0.0.1). Trying something else. Aug 04 18:38:10.025 [Info] resolve_my_address(): Interface IP address '192.168.1.130' is a private address too. Ignoring. Aug 04 18:38:10.026 [Info] resolve_my_address(): Address 'CRZ' resolves to private IP address '127.0.0.1'. Tor servers that use the default DirServers must have public IP addresses. Aug 04 18:38:10.027 [Info] router_pick_published_address(): Could not determine our address locally. Checking if directory headers provide any hints. Aug 04 18:38:10.027 [Info] update_consensus_router_descriptor_downloads(): 0 router descriptors downloadable. 0 delayed; 2494 present (0 of those were in old_routers); 0 would_reject; 0 wouldnt_use; 0 in progress. Aug 04 18:38:10.028 [Info] resolve_my_address(): Guessed local hostname 'CRZ' resolves to a private IP address (127.0.0.1). Trying something else. Aug 04 18:38:10.029 [Info] resolve_my_address(): Interface IP address '192.168.1.130' is a private address too. Ignoring. Aug 04 18:38:10.030 [Info] resolve_my_address(): Address 'CRZ' resolves to private IP address '127.0.0.1'. Tor servers that use the default DirServers must have public IP addresses. Aug 04 18:38:10.030 [Info] router_pick_published_address(): Could not determine our address locally. Checking if directory headers provide any hints. Aug 04 18:38:10.031 [Info] routerlist_remove_old_routers(): We have 2617 live routers and 1253 old router descriptors. Aug 04 18:38:10.032 [Info] resolve_my_address(): Guessed local hostname 'CRZ' resolves to a private IP address (127.0.0.1). Trying something else.

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How to fully utilize resources for relay?
by Steve Snyder 05 Aug '11

05 Aug '11

I have a machine that is dedicated to being a Tor exit node. How can I maximize the performance (high throughput / low latency) of Tor traffic? I have plenty of under-utilized CPU and RAM resources on this system. According to TorStatus, my bandwidth is rarely maxed-out. This is on a Linux system, currently running Tor v0.2.2.30-rc. So... what resources can I spend to make this a better Tor node? Thanks.

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Number of Connections Open
by Tim Sally 02 Aug '11

02 Aug '11

Hi! I'm working on a model to estimate the number of connections an OR has open as a function of the OR's bandwidth. I could really use some help confirming that my model is reasonable. Would any relay operators be willing to share the results of some variant of netstat | wc -l and the bandwidth of the relay? Thanks, Tim

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Flags
by vinc3nt 01 Aug '11

01 Aug '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hello, I have set up a Tor relay. Where can I find online documentation that explains the meaning of all flags set: Authority Bad Directory Bad Exit Exit Fast Guard Hibernating Named Stable Running Valid V2Dir Some are intuitive, but others do not understand the meaning tnx - -- vinc3nt +--------------------------------------------------------------------+ |GPG Id key: 4096R/1E2A7F06 2010-11-23 http://pgp.mit.edu | |Key Fingerprint: 1355 B43E 99A9 37EF 5F27 A399 B71C 8AEB 1E2A 7F06 | |() ascii ribbon campaign - against html e-mail | |/\ www.asciiribbon.org - against proprietary attachments | +--------------------------------------------------------------------+ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQIcBAEBAgAGBQJONoYsAAoJELcciuseKn8GEX4P/jmXuLHL7nKyDA7vOegKMeii HgesWX2cUbxpVkOzbVZ/ubtE2RMFmVfikS4ChbcIFzAECOKRctY1lDy45Sihwtit jNysYwm9Fh/3uBlpRPMdMhHA8g7rr6Xh5lDvkSTdeyJVAx0xnOLNEhT3Oi2aYsZF a2vgcwTLdsvgDRxMynDhDKwxKIfyPZk443gEYMaT3kxVlxr18zD8XDsFxbVOl9LO HhCZ3USJYHW/rWf3v1+HsIx28CHl0RaxPkwtMzX9oXvN5mLYyYy1O0w2wV7mDnp3 59BOAhxbe3oY6F4fmBrw3FyPfgUDPfD0DaY6UZxnokXeRG743XK8AkfXTkiP0g4B /MxBqWypqcNGUvlToii7GBW8RZt+wBukeS50Qok8+RLIIB7SZSPVx90GnZxCl2q5 tnrlqM0dNKi0/jXUHpcmuxsYVLGQ+k+8Ky2E106pagYiayYeajbhuXjPOmZIqYMu dXTqotR1p4JbJFnrmyFRomgDetKUBaZRk6Kjnln8grQyMglPoKFb/1EvtgxrKMOf hysEakFhIAV8yeCYiQAPm0vfSudgpz6i6reStqTMVrjQqm/HObedSTvN+h/Oy2QX MR1r8TTOSdRZgglxy59g/H4EruQxSET5P/RdnCBcRbLp6xDymPOilpSl+bhBS8KO zOt0C+asU/krtS/XDVzt =KUbN -----END PGP SIGNATURE-----

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