[tor-dev] Best way to client-side detect Tor user without using check.tpo ?

[Ian Goldberg]

On Sun, Feb 08, 2015 at 02:01:40AM -0500, Roger Dingledine wrote:
> In the distant past, we had a ".noconnect" special extension in Tor:
> https://gitweb.torproject.org/torspec.git/tree/address-spec.txt#n58
> and the idea was that you would connect to Tor's control port, induce a
> request for foo.noconnect, and see if you saw stream events for it. If
> you did, things were configured correctly. But we disabled .noconnect
> because we worried it could be used to notice Tor users in some way.
> And it sounds like that solution wouldn't work for you anyway, because
> if things *aren't* configured correctly, then your browser would
> generate a funny-looking request that everybody knows is a Globaleaks
> Tor check?

If you can connect to the control port, can't you just get the browser
to load "google.com", and see if the corresponding stream gets created?