[tor-bugs] #24499 [Core Tor/Torflow]: Bandwidth determination is flawed

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#24499: Bandwidth determination is flawed
------------------------------+---------------------
 Reporter:  Hassprediger      |          Owner:  tom
     Type:  defect            |         Status:  new
 Priority:  Medium            |      Milestone:
Component:  Core Tor/Torflow  |        Version:
 Severity:  Normal            |     Resolution:
 Keywords:  tor-bwauth        |  Actual Points:
Parent ID:                    |         Points:
 Reviewer:                    |        Sponsor:
------------------------------+---------------------

Comment (by starlight):

 Prospects for improvement for nodes hosted in TPG do not look good.
 Hurricane Electric's looking-glass (https://lg.he.net/) shows fairly
 terrible latency from Australia to Singapore, to Hong Kong and to
 Vancouver Canada.  No obvious way exists to improve the bandwidth scoring
 of the relay in question aside perhaps from locating bandwidth scanners
 and servers directly in Australia.

 {{{
 core1.fra1.he.net> traceroute 60.240.245.76 source-ip 216.218.252.174
 numeric
   SSH at core1.fra1.he.net>traceroute 60.240.245.76 source-ip 216.218.252.174
 numeric

 Tracing the route to IP node (60.240.245.76) from 1 to 30 hops

   1    30 ms   18 ms   49 ms 72.52.92.13
   2    80 ms   97 ms  100 ms 184.105.81.77
   3   178 ms  167 ms  153 ms 184.105.81.213
   4   321 ms  323 ms  376 ms 64.62.194.114
   5   322 ms  328 ms  350 ms 203.221.3.65
   6   375 ms  377 ms  374 ms 203.219.57.214
   7    *       *       *     ?
   8    *       *       *     ?
   9    *       *       *     ?
  10    *       *       *     ?
 IP: Errno(8) Trace Route Failed, no response from target node.

 # Entry cached for another 23 seconds.

 core1.sin1.he.net> traceroute 60.240.245.76 source-ip 27.50.33.9 numeric
   SSH at core1.sin1.he.net>traceroute 60.240.245.76 source-ip 27.50.33.9
 numeric

 Tracing the route to IP node (60.240.245.76) from 1 to 30 hops

   1    73 ms   74 ms   74 ms 184.105.64.254
   2   174 ms  175 ms  174 ms 184.105.213.117
   3   184 ms  191 ms  201 ms 184.105.223.217
   4   271 ms  275 ms  274 ms 64.62.194.114
   5   283 ms  267 ms  273 ms 203.221.3.65
   6   325 ms  349 ms  334 ms 203.219.57.150
   7    *       *       *     ?
   8    *       *       *     ?
   9    *       *       *     ?
  10    *       *       *     ?
 IP: Errno(8) Trace Route Failed, no response from target node.

 # Entry cached for another 24 seconds.

 core1.yvr1.he.net> traceroute 60.240.245.76 source-ip 216.218.252.160
 numeric
   SSH at core1.yvr1.he.net>traceroute 60.240.245.76 source-ip 216.218.252.160
 numeric

 Tracing the route to IP node (60.240.245.76) from 1 to 30 hops

   1     3 ms    3 ms   14 ms 184.105.64.109
   2    22 ms   27 ms   33 ms 184.105.223.217
   3   241 ms  247 ms  249 ms 64.62.194.114
   4   249 ms  250 ms  252 ms 203.221.3.66
   5   299 ms  298 ms  334 ms 203.219.57.150
   6    *       *       *     ?
   7    *       *       *     ?
   8    *       *       *     ?
   9    *       *       *     ?
 IP: Errno(8) Trace Route Failed, no response from target node.

 # Entry cached for another 29 seconds.

 core1.hkg1.he.net> traceroute 60.240.245.76 source-ip 27.50.33.1 numeric
   SSH at core1.hkg1.he.net>traceroute 60.240.245.76 source-ip 27.50.33.1
 numeric

 Tracing the route to IP node (60.240.245.76) from 1 to 30 hops

   1    60 ms   64 ms   47 ms 184.105.64.130
   2   156 ms  149 ms  150 ms 184.105.213.117
   3   168 ms  160 ms  170 ms 184.105.223.217
   4   247 ms  237 ms  243 ms 64.62.194.114
   5   243 ms  249 ms  250 ms 203.221.3.1
   6   299 ms  376 ms  298 ms 203.219.57.150
   7    *       *       *     ?
   8    *       *       *     ?
   9    *       *       *     ?
  10    *       *       *     ?
 IP: Errno(8) Trace Route Failed, no response from target node.

 # Entry cached for another 25 seconds.
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24499#comment:8>
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