Sharing a PCMCIA wireless broadband connxn on a p2p network
I've got a PCMCIA wireless broadband card (iBurst anyone?), a laptop running uBuntu 6.10 that it plugs into, and a desk-top box running Windows XP. The XP desktop is currently peer-to-peer networked with the laptop - in practice this means that I set the subnet mask for both to 255.255.255.0, the IPs to 18.104.22.168 and 22.214.171.124 respectively, and the gateway / broadcast address to 126.96.36.199 - then use the Samba plug-in to effect files transfer between the XP and Linux systems. I currently use the wireless card only in the laptop - what I want to do is allow the XP box to connect to the net via the wireless card in the laptop.
How do I go about this ?
I have been told I need to set a rule in iptables, but some guidance as to how to do that (if it is indeed at least one of the things that need to be done) would be appreciated.