Ask Slashdot: Linux as a Dial in IPX gateway?

wiggles asks: "I have a 486 100MHz running Red Hat 5.2, acting as an internet gateway running IPMasquerade. What I want to be able to do is to allow someone to dial in to the box, then talk IPX to the rest of the machines on the network. The reason I want to do this is so I can have people inside the network playing Starcraft with someone from outside the network by way of the outsider dialing in to play over the network. Any suggestions?"