I'd like to use this to help maintain a good defence against people trying to skirt the rules of my system. I've found TOR endpoints, nothing that's readily available to be shot into a script (needs to be parsed) but they work. However I need a list which goes beyond TOR yet I cannot find anything conclusive just yet.
Any suggestions would be greatly appreciated.
interesting with tunnel huntering ? try here. http://www.google.com/search?hl=en&client=firefox-a&hs=8Uq&rls=org.mozilla:en-GB:official&ei=6Un0S_KcGYrH-QbFn6GcDg&sa=X&oi=spell&resnum=0&ct=result&cd=1&ved=0CBcQBSgA&q=layer+7+tunneling+detection&spell=1
I not sure will this be helpful to you? I have found IP2Location is offering a database service for proxy detection call IP2Proxy. It's useful for helping me block certain IP address detected as proxy from viewing my website content.