OK I managed to get both PCs to ping eachother however I have a problem to get the XP machine to connect to the internet through the ubuntu machine.
The machines are connected like this:
172.16.0.2 - UBUNTU PC - 192.168.1.66 [dhcp]----> 192.168.1.254 [MODEM]
|
| < cross over cable
|
172.16.0.1 - XP SP2 PC
I want that the XP machine connects to the internet through proxy and dansguardian which is 172.16.0.2. This is the configuration of the routing on my ubuntu machine :
ImageShack - Hosting :: screenshot1jv1.png
Can you help? Thanks