On Tue, May 15, 2018 at 08:12:50PM -0400, Neel Chauhan wrote:
> Hi tor-relays mailing list,
>
> I have noticed that the Tor consensus server tor26 (https://metrics.torproject.org/rs.html#details/847B1F850344D7876491A54892F904934E4EB85D)
> is blocked on Verizon's UUNET (AS701) backbone, and therefore, Verizon's
> retail services like FiOS and Wireless. I can confirm this on FiOS, but I
> don't use Verizon Wireless (my smartphone uses Sprint) so I can't test it
> there.
>
> A traceroute to tor26's IP address 86.59.21.38 from a Brooklyn apartment
> shows this is filtered on Verizon's backbone:
>
> neel@xb2:~ % traceroute 86.59.21.38
> traceroute to 86.59.21.38 (86.59.21.38), 64 hops max, 40 byte packets
> 1 unknown (192.168.1.1) 1.128 ms 0.780 ms 0.613 ms
> 2 lo0-100.NYCMNY-VFTTP-401.verizon-gni.net (173.68.77.1) 1.001 ms 3.632
> ms 0.900 ms
> 3 B3401.NYCMNY-LCR-22.verizon-gni.net (100.41.137.96) 2.291 ms
> B3401.NYCMNY-LCR-21.verizon-gni.net (100.41.137.94) 3.172 ms 4.046 ms
> 4 * * *
> 5 * * *
> 6 * * *
> 7 * * *
> 8 * * *
> 9 * * *
> ^C
> neel@xb2:~ %
>
> In a normal traceroute, you will see ALTER.NET at hop 5. Also, the subnet
> 86.59.21.0/24 is not filtered on UUNET. A traceroute to 86.59.21.1 works:
>
> neel@xb2:~ % traceroute 86.59.21.1
> traceroute to 86.59.21.1 (86.59.21.1), 64 hops max, 40 byte packets
> 1 unknown (192.168.1.1) 0.863 ms 0.757 ms 0.579 ms
> 2 lo0-100.NYCMNY-VFTTP-401.verizon-gni.net (173.68.77.1) 1.010 ms 1.545
> ms 1.034 ms
> 3 B3401.NYCMNY-LCR-22.verizon-gni.net (100.41.137.96) 3.616 ms
> B3401.NYCMNY-LCR-21.verizon-gni.net (100.41.137.94) 5.696 ms 10.062 ms
> 4 * * *
> 5 0.et-5-1-5.BR3.NYC4.ALTER.NET (140.222.2.127) 3.492 ms 3.506 ms 2.996
> ms
> 6 204.255.168.118 (204.255.168.118) 8.462 ms 7.479 ms 7.252 ms
> 7 144.232.4.84 (144.232.4.84) 5.041 ms 4.688 ms
> sl-crs3-lon-0-6-3-0.sprintlink.net (144.232.9.165) 71.865 ms
> 8 sl-crs2-lon-0-0-3-0.sprintlink.net (213.206.128.181) 72.214 ms 73.579
> ms 72.339 ms
> 9 213.206.129.142 (213.206.129.142) 81.390 ms
> sl-crs4-ams-0-7-0-3.sprintlink.net (213.206.129.139) 85.854 ms 93.238
> ms
> 10 217.149.47.46 (217.149.47.46) 79.004 ms 85.669 ms 79.392 ms
> 11 ams5-core-1.bundle-ether1.tele2.net (130.244.82.54) 86.507 ms 78.374
> ms 77.740 ms
> 12 ams-core-2.bundle-ether9.tele2.net (130.244.82.57) 79.642 ms 77.926 ms
> 81.515 ms
> 13 wen3-core-2.bundle-ether15.tele2.net (130.244.71.47) 105.400 ms
> 105.089 ms 109.751 ms
> 14 tele2at-bundle2-vie3.net.uta.at (212.152.189.65) 122.716 ms 110.820 ms
> 114.354 ms
> 15 86.59.21.1 (86.59.21.1) 106.389 ms * 105.379 ms
> neel@xb2:~ %
>
> I got in contact with Peter Palfrader and he says he couldn't help, and also
> with Verizon FiOS support and they said the filtering 'isn't on Verizon's
> network' (read: isn't on Verizon's internal FiOS network but still on
> Verizon's AS701 which I have to go to to get anywhere on the Internet here).
>
> I know that this IP could have been blackholed, and you may think that if
> Verizon is blocking it, then isn't Level 3 or Cogent? Well, Cogent doesn't
> block tor26:
>
> traceroute to 86.59.21.38 (86.59.21.38), 30 hops max, 60 byte packets
> 1 gi0-1-1-19.5.agr21.jfk02.atlas.cogentco.com (66.28.3.113) 0.727 ms
> 0.727 ms
> 2 be2605.ccr41.jfk02.atlas.cogentco.com (154.54.1.153) 2.177 ms
> be2606.ccr42.jfk02.atlas.cogentco.com (154.54.2.29) 0.734 ms
> 3 be2490.ccr42.lon13.atlas.cogentco.com (154.54.42.86) 68.557 ms
> be2317.ccr41.lon13.atlas.cogentco.com (154.54.30.186) 70.829 ms
> 4 be12488.ccr42.ams03.atlas.cogentco.com (130.117.51.42) 74.570 ms
> be12194.ccr41.ams03.atlas.cogentco.com (154.54.56.94) 76.767 ms
> 5 be2434.agr21.ams03.atlas.cogentco.com (130.117.2.241) 74.515 ms 74.612
> ms
> 6 149.6.129.250 (149.6.129.250) 80.758 ms 74.625 ms
> 7 ams5-core-1.bundle-ether1.tele2.net (130.244.82.54) 75.421 ms 75.425
> ms
> 8 ams-core-2.bundle-ether9.tele2.net (130.244.82.57) 74.516 ms 74.558 ms
> 9 wen3-core-2.bundle-ether15.tele2.net (130.244.71.47) 97.605 ms 95.470
> ms
> 10 tele2at-bundle2-vie3.net.uta.at (212.152.189.65) 100.314 ms 97.947 ms
> 11 86.59.118.145 (86.59.118.145) 96.918 ms 98.620 ms
> 12 tor.noreply.org (86.59.21.38) 97.853 ms 98.110 ms
>
> (Source: http://www.cogentco.com/en/network/looking-glass)
>
> It could be possible that other Tier 1 networks formerly blocked tor26, and
> also unblocked, but Verizon was sloppy not to do so.
>
> It's also possible that Verizon could be doing it because the FCC repealed
> Net Neturality, and wants to discourage use of Tor to mine FiOS/VZW
> customers' browsing habits. But despite a NN repeal I can still access Tor
> on FiOS, and also run a relay (I do both) because other consensus relays are
> still unblocked.
>
> But if Verizon didn't unblock tor26, could it actually mean that Verizon
> wants to discourage Tor (and VPN/proxy) use to try to mine information of
> their customers (and sell ads/information) and direct users to VZ-owned AOL
> and Yahoo? Well, I hope they were just sloppy and don't mean to wage war on
> Tor.
>
> While I'm not saying you should avoid using anything Verizon at all costs (I
> certainly wouldn't want to go to the local cable company), I just want to
> point out a blocked consensus server.
I'm seeing the same thing from the greater Baltimore, MD area:
traceroute to 86.59.21.38 (86.59.21.38), 64 hops max, 40 byte packets
1 172.16.3.1 (172.16.3.1) 0.172 ms 0.162 ms 0.115 ms
2 lo0-100.BLTMMD-VFTTP-323.verizon-gni.net (100.16.216.1) 23.228 ms 7.782 ms 2.901 ms
3 B3323.BLTMMD-LCR-22.verizon-gni.net (100.41.222.240) 2.982 ms
B3323.BLTMMD-LCR-21.verizon-gni.net (100.41.222.238) 1.702 ms
B3323.BLTMMD-LCR-22.verizon-gni.net (100.41.222.240) 7.756 ms
4 * * *
100.41.222.240 is AS19262.
Thanks,
--
Shawn Webb
Cofounder and Security Engineer
HardenedBSD
Tor-ified Signal: +1 443-546-8752
Tor+XMPP+OTR: lattera@is.a.hacker.sx
GPG Key ID: 0x6A84658F52456EEE
GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE
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