Suggestions on Remote access and Security.?

Specifically, I have several computers on a wireless network, another computer running CentOS 5, and everything is behind a Cisco PIX 501. I want to add two drives on one of my PCs which are shared across my network as virtual shares on the Linux box via exportfs and samba so that I may SSH into that Linux box to add, remove, change files from the Linux box through the samba connection from away from home. I have no clue where to start. What do you smart people out there suggest. I will most likely have to setup my PIX to allow public to private translation through NAT and also enable connections for using FTP, SSH, and whatever port Putty uses as well.