The setup is this.
10mb line in to a P200 running 98 and Tiny firewall with two NIC´s. Then a switch and three puter in a LAN. One of these is currently running an ftp.

How do I direct al port 21 traffic to the ftp computer?
The problem is that I don´t know where to start looking.. is it Tiny that I need to modify?
(another problem is that I´ll only get a couple of hours to set everything up so I don´t want to run into to many problems when I´m at it)