A nice read here
http://www.slideshare.net/dakami/black-ops-of-tcpip-2011-black-hat-usa-2011 (jump to page 21)
Just one question from someone that doesn't has any knowledge

, if i can get the users IP's, even if i can't link it directly to any wallet address, i still have the ability to "attack" that user, isn't that true? Something like a postman, even if he doesn't know who i am, if he has my address, he can still deliver the packages!?! On the other side, if my ip is hidden, how can some hacker reach my computer?
