How to ban registrations from TOR exits?

Question

I am getting far too many fake registrations through TOR exits. I would like to block these registrations like major sites do. What is the proper way to do that?

Answer 1

Refer http://torproject.org/docs/faq-abuse.html.en#Bans

First, ask yourself if there's a way to do application-level decisions to separate the legitimate users from the jerks.

Second, consider that hundreds of thousands of people use Tor every day simply for good data hygiene.

Ask yourself what you do about other services that aggregate many users behind a few IP addresses; Tor is not so different from AOL in this respect.

Lastly, please remember that Tor relays have individual exit policies.

If you really want to do this, we provide a Tor exit relay list or a DNS-based list you can query.