If a hacker wants to cover his tracks by using a proxy server are there any limitations?.
Ect i heard someone that i know say he used to brute force hotmail passwords using 90 anon proxy servers .Is this possible,can you port scan and DDos thru 90 proxy servers aswell?.I thaught if you tryed brute forcing hotmail with that many proxy servers would'nt you flood ur own box or sumin?.I need someone to help me understand please..

(Sorry if i brought up hotmail and brute forcing in the same sentance but i am just trying to understand the limitations of proxy servers so ect if i get portscanned i want to know if its coming from the intruders computer or a comprised one or if its possible to hide behind a proxy.)