changing your ipads local ip address (if that is even possible considering how closed apples software tends to be) would do nothing. You need to change your external IP address. If you have a static external ip address you need to call your isp and ask them to change your ip address for you. If you don't have a static external ip address it might work to just restart your router, but if not you should call your isp and ask them about changing your ip address or when they'll change it next. After that you can check your ip address change or not using the site XXXXXXXXXXXX. Here it display Internet service provider, IP address,location, Longitude, latitude and so on...