Outbound Port

Hey,

I have Raspberry Pi that act like proxy. I would like the entire 80 port connections to go through the device but I couldn't find how to do it.

For example - So if I use my Laptop to surf the web, all 80 port requests should go via The Raspberry Pi.

I use the original Firmware Version:3.0.0.4.378_9313

Anyone can help me how to do it?