Excerpts from grarpamp's message of 2012-10-30 10:20:03 +0100:
Shouldn't some exit relays (funded or not) be deployed to use an exit IP that is different from it's advertised exit IP in order to prevent a simplistic form of blocking based on scraping the descriptor set? I think this can happen if the default route is out another interface or secondary address. Something of that nature.
There are a few exits that do that, IIRC, however, please correct me if I'm wrong, it causes https://check.torproject.org/ to tell the user that they aren't using Tor for their connection.
It's one thing having a green onion in your browser bar, another to get confirmation from a service dedicated to only check if the connection is coming from the Tor network ... There's potential for people being quite confused by such a setup. From a usability standpoint, I think it's a bad idea at this point.
In regards to solutions for this, I'm wondering if there could be some sort of callback that would drop the connection if it didn't come from a check.torproject.org request?
Michael