Re: is it necessary change ip address and MAC address both...??
Old thread but I'll bite.. no need to change your MAC address.
Personally though, I change my router's MAC address when I go to change my IP address. I do this because with a new router MAC address it's easier and faster to get a new IP address. It's just how my setup works. My broadband modem won't change if it's connected to the same MAC address.. so I change it...