Why would you want to change your Internal IP lakh_ma_ek? I'd make my private network all Static, so that I would be able to designate open service ports on specific machines and have granular control over them. If it's about the Default Gateway IP, or the IP that you use to communicate with the external world, then I have a sad news... we can't apply for, or own any IP .. they're all gone~~ which means they can be leased from the ISPs. If I sit infront of my PC and try switching between different 'Interent IPs', tough luck to me!! However, since the generic DSL/Cable packages provide dynamic IPs, turning off the modem for about half hour usually ends up grabbing another set of octets (new IP) when it gets fired up the next time. Proxies would meet your requirement upto an extent though! ~@~