Re: [tor-talk] End-to-end correlation for fun and profit

["Runa A. Sandvik" <runa.sandvik@xxxxxxxxx>]

On Tue, Aug 21, 2012 at 6:21 PM, The Doctor <drwho@xxxxxxxxxxxx> wrote:
> As I understand it, Tor nodes know IP addresses one up and one down in
> a circuit.  I haven't read through the Tor codebase in a while (two or
> three years), so my question is this: Does Tor apply the same family
> avoidance check when picking nodes to avoid routing traffic through,
> say, two nodes on the same /16?  In other words, would Tor do this:
>
> 192.168.1.23  ->  172.16.23.93  ->  10.0.61.44
>
> ..or would this be a possible scenario:
>
> 192.168.1.23  ->  172.16.23.93  ->  192.168.88.77
>
> (Reference: https://trac.torproject.org/projects/tor/wiki/doc/TorFAQ,
> section "Which Tor node knows what?" (which seems to need a link in
> the ToC))

From https://gitweb.torproject.org/torspec.git/blob_plain/HEAD:/path-spec.txt:
"We do not choose more than one router in a given /16 subnet (unless
EnforceDistinctSubnets is 0)."

-- 
Runa A. Sandvik
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