There are 2 ways of getting Proxy IP address on your Ipad. First you need to connect your Ipad with any Modem/Router through Internet.
1)Using the proxy server (or) Hide IP software, you can pretend as acting from different countries like Japan, Canada, USA etc.. It helps to change your IP address and also hiding the original IP address by showing a fake IP address in your Ipad.
2)If your Internet service Provider(ISP) provides you with a Dynamic IP address, it may change your Ipad IP address from time to time whenever you reset (or) unplug the modem/router.
To check whether your IP address is changing in your Ipad (or) not, visit the site IP-details.com .