Re: [tor-dev] How many exits exit from an IP address different than their OR address? (10.7%)

On 01/11/2016 06:43 PM, David Fifield wrote:

Also, there are several groups of exits whose OR addresses *are* in a related subnet, but which all exit through the same, unrelated, IP address. See for example 109.236.82.* (all exiting through 185.108.128.7), 178.17.171.* (all exiting through 37.48.65.71), and 217.23.11.* (all exiting through 85.17.31.120) in the table below.

This is quite interesting, thanks for the report. I'm not sure why it would be advantageous to set up a server or network this way, but I guess they have their reasons. Maybe those are part of a traffic analysis setup, who knows.

As have probably concluded from your table, Tor directory authorities allow up to two Tor nodes per IP address.