I was going through a security video a few weeks ago and I have been trying to figure out a way of doing this for the past 2 weeks. Tor exit nodes are generaly infrequently used by regular end users and are more often than not uses to connect in order to gather info using suites like Backtrack, and Kali which I am a fan of. Now in the general linux firewalls there is an ability to do an HTTP get to compile the list of Tor Exit nodes and then a script which allows the firewall to do a quick reference to the list in order to block the traffic. Also I have seen a script on the IronGeek website that maybe helpful in regards to detecting tor exit nodes. Does the mcafee firewall enterprise have any way of blocking Tor exit nodes or does anyone have a method of blocking such traffic?