OK, I understand you have a 2 computers:
1) Linux
2) Linux, Windows (Dual-Boot)
I am assuming you want to use the stand-alone Linux box as the router. Here is the best answer i can give you:
Have ipchains configured for kernel(That is already done in most new (distros)
After you connect to the net on the linux box on any interface( ppp0, ethX), run these simple commands as root:
/sbin/ipchains -P forward DENY
/sbin/ipchains -A forward -i ppp0 -j MASQ
echo 1 > /proc/sys/net/ipv4/ip_forward
To set up the Windows box to use the net:
I am assuming you already have a network link between them that they both recognize. (i.e. ping each other)
Control Panel | Network | (Find the NIC) | Properties | Gateway | enter the ip addres of the Linux box Restart Windows
In this config the Win/Linux box uses the stand-alone Linux box as the gateway to thew net.
That would be the quick way of doing it. There way be details i left out. You can email me:
drewkennerly@hotmail.com