To change the IP address, the solutions are quite simple. You should know that each Internet service provider assigns an IP address to each Internet user who connects to the Internet.
In most cases, the IP address is dynamic, which means that it changes each time you restart your ADSL modem. Some Internet Service Providers sometimes give you a fixed IP address (which has its advantages and disadvantages).
To change your IP address, simply restart your ADSL modem and that's it :)
There are also simple techniques for changing your IP address without even rebooting your ADSL modem.