Using Nmap: Spoofing an IP Address

Besides that fun fact, you spoofed a wireless ip not an external ip. Assuming you were trying to make yourself obscure from someone else over the internet and not your parents whom are on the wireless network at home.

Spoofing an IP address really does nothing, its the MAC that ids your computer to the ISP provider, so if you were to in fact do something malicious like launch arbitrary denial of service attacks against a network with a fake MAC address then there is no hard evidence that it was ever really you that did it. The reason being that the MAC is the address of your hardware or (wired router) which is in turn tied to you ISP account that has your home address.

Lame just changed his internal IP you can do that without Nmap...
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nice starter tutorial

wow congratulations you changed your internal IP on a network,.. doesn't really do jack shit dude.. big deal..

basicly a proxy, right?

easyeh.

waht does spoofing mean?