[tor-relays] bandwidth authority algorithm is cracked

julien.robin28 at free.fr julien.robin28 at free.fr
Fri Jan 10 08:37:34 UTC 2014


I had the same problem since begining of december on my ArachnideFR94 server (88.191.192.25, service provider : Iliad - Online.net) : Consensus weight from more than 100,000 to brutally 6,000 and 20,000, after a few time rise up to 50,000, and brutally fall down back 3,000 and 10,000 the following day, 30,000, 12,000, 8,000... after an entire month of bandwith never rising back and falling down even lower, after i tryed everything (create a new server identity, but after some weeks, same problem), seeing worst and worst, end of november my bandwith was about 20MB/s  (sometimes into the top 5 of the world biggest servers !), it was about 0,9MB/s when I decided to close it. 

No problem of bandwith with the service provider, the bandwith graph were just starting to brutally go down a couple of minutes after the consensus weight brutally fall back. I was thinking it was because too many tor relays are running on this service provider (since end of July, 2013, Tor relays are accepted by this service provider and the service provider also opened to internationnal with interesting prices).

And I have no problem with my 2 others servers at "Digicube" service provider.

If it can help !

Best regards
Julien ROBIN

----- Mail original -----
De: "starlight 2014q1" <starlight.2014q1 at binnacle.cx>
À: tor-relays at lists.torproject.org
Envoyé: Vendredi 10 Janvier 2014 05:49:20
Objet: [tor-relays] bandwidth authority algorithm is cracked

The bandwidth authorities assign all kinds of
wildly incorrect capacities to the Tor node
here.

The Tor relay software has been up for 45 days
and has not been down for more than five minutes
for three or four months.

Occasional outages from the ISP mucking
with their network, but nothing more than
ten or fifteen minutes in any week.

The local node bandwidth calculation is
consistently 490-495 Kbytes/sec.  Very
stable.  Very consistent.

The Tor bandwidth authorities assign
values anywhere from 100 Kbytes/sec to
almost 700 Kbytes/sec in an oscillating
pattern with a period of about one week.

Something is seriously wrong with that.

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