Add Tor Blocker to Defender

Please add Tor Blocker functionality to help block brute force attacks to Defender.

For a week now I've been getting new form submissions and login attempts every few minutes. Every IP address is different, but all are from Tor Exit routers. All Defender has done is monitor the situation and locked IP's out that try to login too many times. But that really doesn't matter when the IP changes every few minutes.