Hi, I met a boring problem.My pc with Windows XP is blocked by Cablevision, maybe because of some virus in my system. I have reinstalled my system ( change to Ubuntu). But I still could not access to internet :(. I knew some method like that if I change the mac address of my laptop, maybe Cablevision does not know, so then I could access to internet. But I do not know how to do this? I found some information like: sudo ifconfig eth0 down sudo ifconfig eth0 hw ether 00:aa:bb:cc:ee:ff (new mac add