Most if not all applications use a port #. Do a little digging, get the correct port and allow it through your firewall from your LAN. That said most distributions that I have used allow any application originating from the LAN side out to the internet and the returning traffic back in. »

Yeah but it's pretty basic..I learned the hard way. If you don't have a linux gateway where you can use iptables then I would use firestarter on your workstations. If you have a home base web server, ftp, or anything else that you want accessible from the internet this is even more true. just my .02 »

donatello, I am firewalled with masquerading using iptables. Most firewalls allow port forwarding. Simply forward the ssh port that you are using to the ssh server to which you want to connect. That way you can log into your network and then ssh to any of the other computers that you need to access. »