How to get my Dad's Win2k system to access internet through my FreeBSD 6.2 system

[Wojciech Puchar]

> internet. My freebsd 6.2 box is connected to the internet and has 2 network 
> cards, rl0 and rl1. rl0 connects to the ISP and rl1 is directly connected via 
> a long Ethernet cable to the NIC on my dad's machine. While I can access the 
> internet easily, I want my dad to be able to connect to the internet with my 
> freebsd box serving as the gateway. Can anyone please explain to me in easy 
> steps how to accomplish this ?
>
reading admin's handbook or using google will give you an answer