[tor-talk] Network diversity [was: Should I warn against Tor?]
tortalk at informationelle-selbstbestimmung-im-internet.de
Mon Jul 8 20:12:33 UTC 2013
On Mo, Jul 08 2013, grarpamp wrote:
>> From the paper by Murdoch and Zieliński :
>>  http://www.freehaven.net/anonbib/#murdoch-pet2007
>> “We suggest that existing models, based on Autonomous System (AS)
>> diversity, do not properly take account of the fact that while, at
>> the AS level abstraction, a path may have good administrative domain
>> diversity, physically it could repeatedly pass through the same
>> Internet eXchange (IX).”
> It would be interesting to include a traceroute service in each node
> such that path building might take into consideration such IX/AS
> repetitions over the proposed full path. Note however that MPLS
> routing used to engineer traffic schemes can hide the actual path
> from traceroute (though mitigated by its usual use only within one AS).
> And other than of geolocation, it's quite hard to align IX nodes with
> traceroute data.
Thanks a lot for bringing up this topic. Actually, there is a 2009
paper exploring the IX structure . Their data set is published
Being German I restricted EntryNodes to DE and ran traceroutes to
the 3 German guards selected by my Tor client. Two of those
traceroutes showed IP addresses of DE-CIX (so I don’t want them),
while the third one does not contain any IP address of .
I guess I’ll check that out systematically to find “my” EntryNodes.
When restricting Tor nodes by country, I recommend to update
src/config/geoip first. E.g., zeller is listed as German node with
Tor v0.2.3.25 (where geoip dates back to May 2012), but lies in
Seattle , which can be corrected with a new MaxMind download.
> [Somewhere in all of this there is something to be said for peer
> owned p2p meshnets and co-op's...]
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