[tor-dev] Detecting if a IP address belongs to a Tor Exit node.

Jorge Couchet jorge.couchet at gmail.com
Fri Dec 7 07:16:26 UTC 2012

Thanks to all for the help!



On Fri, Dec 7, 2012 at 5:05 AM, David Fifield <david at bamsoftware.com> wrote:
> On Thu, Dec 06, 2012 at 08:39:09AM +0100, Karsten Loesing wrote:
>> >>>> Why not just run and query an Onionoo server?
>> >>>
>> >>> Onionoo isn't really optimised in regards to giving out lists of
>> >>> exits, the parsing of the JSON sounds like a duplicate effort to me.
>> >>> Also, shipping Onionoo with every facilitator seems a bit overkill.
>> It's not Onionoo's primary purpose to give out lists of exit addresses,
>> but it provides that information, too.  It just doesn't offer good query
>> parameters for that use case.  But I think you should do okay
>> downloading the full set of relay summaries once per hour and cache that
>> data locally.  The URL is:
>> https://onionoo.torproject.org/summary?type=relay&running=true
>> The protocol specification is here:
>> https://onionoo.torproject.org/
>> I wouldn't recommend running your own Onionoo server, particularly not
>> on every facilitator.  But if you cache results, you don't really have
>> to do that.
> Thank you, Karsten, for the helpful information.
> Jorge, I think that using Onionoo as a data source is the thing to do.
> You should be able to adapt your program from
> https://trac.torproject.org/projects/tor/ticket/7549#comment:4. You can
> assume that the Python json library is present.
> David Fifield

More information about the tor-dev mailing list