Remote IP and Local IP in code igniter

[eluser]Unknown[/eluser]
Hello everybody,

I am newbee for CodeIgniter and I would need your support and help for one of my problem.

My problem is,

I would like to catch clients local ip and their remote ip.
eg. If my user is inside a corporate LAN network, user would have to definitely use any proxy (either squid or any other). Now I would like to catch their global IP and their local proxy or client IP thru CodeIgniter.

Any help is much appreciated.

Thanks