How To change Ip address?

Introduction:-
Changing the ip address of a computer refers to spoofing ip address. actualy now you can not spoof your ip address because when you spoof your ip address and send the message on the network then the gateway from which your message passess to the server will not except your request because this gateway except request only from a computer that is under its range and because you have changed your ip so you are no more in its range therefore you will not be able to surf net. hence we tunnel through proxy to get ip address of proxy server and surf net with different ip address.
In tunneling through proxy or using proxy server our request is first send to the proxy server which then send this request to server and after proxy server get's the result of this request it send this result to our computer.
there are many site which u can use for surfing site like www.browser9.com where u can put the name of site which u want's to surf. there is an ulternative to that and that is by using software called ultra surf which tunnel our request directly. and providing a simple and easy way to surf net without going to proxy site to visit some site.
this is very simple to operate and free to use. You can download it from here

problem in ultra surf!
older version of ultra surf don't configure mozilla to surf for proxy surf so to make it work with ultra surf do as i say:-

• go to tools in menu.
• Now click options.
• Now in new window click advanced tab then go to setting option in there.
• Fill your proxy setting as i have filled(see image).
  

TIPS:-
for easier enable and disable of proxy setting in mozilla add a addon quick proxy that will display a image on which P is written u can make it red and green by pressing.
Here green indicate that proxy is enable and red indicate that it is disabled.

Any thing other than ultra surf!!!!!!!!

OR

Ulternative of ultra surf!

vidalia bundle is a freeware integrated software used same as ultra surf do. it is an integration of privoxy and tor where privoxy is proxy server and the tor helps it to connect to proxy server.

this works on all the three mac os, linux and windows operating system.

you can download vidalia bundle for window using above link. and for linux and mac os go here