I was wandering if its possible that an attacker can change your ip? My friend that I built a computer for boots his comp. up one day and he couldnt connect to the internet,Now I tried everything under the sun to fix it. It finally came to wiping the harddrive reinstalling winxp. And it still would not connect? I was dumbfounded.So two days later he calls me and tells me that he had called comcrap(comcast)and they run the ipconfig.exe and that fixed it.

now he is running a hub that feeds internet to his computer and another old one that is running win98se and as far as I know there is no security for the hub itself if there is even a need for it I dont know anything about hubs(and I know he needs a firewall)...But it seems to be like a router and I know that routers are frequently
attacked in an easy manner, I have no idea how but anyway thought I would get possible answers here what do you guys think??