Originally posted by: Dezign
Okay, here I go shamelessly asking questions... does every computer have a specific IP number? And is it true some people use ID-blockers/scramblers? Blah. *feeling stupid, but hoping for an answer*
Sort of. When on an IP based network (internet or whatever) every computer will have at least one unique IP (usually only servers will have more then one, and even then its not terribly common). However, changing an IP is easy. The one thing that generally NEVER changes is the MAC address. This is hardcoded to almost every net work card. I have seen equipment that has a changeable MAC address but that stuff is very rare (and VERY pricey). The only stuff I have seen like that is hardware monitoring pods (for ATM switches in my case) and stuff of that nature.
Depending on the resources you can bring to bear you can match an IP to a person most of the time. Or at least a location. Granted to do that you generally either need to be a government agency (FBI, police and so on) and request it from an ISP, or a very knowledgeable hacker in order to compromise the ISPs network to check their logs.
It is possible (and not very hard) to either spoof an IP or redirect it through multiple proxies. However, if you have some of the resources I already mentioned it just comes down to if you want to take the time/trouble to track it down.
About the only thing that comes close to being untraceble on the internet is to use a laptop with a stolen/cloned cell phone. Even then if say the feds are after you they can figure out where you are down to under a square mile.