I've installed Filezilla Client on a Windows 2008 server behind a Fortigate firewall which protects our domain.
I've installed Filezilla Server on a Windows 7 home computer. This home computer is behind a public Static IP Address: 208.xx.xx.xxx on an AT&T modem that is set in "Bridged" mode to allow traffic to pass through to my own Linksys/Cisco router. This home router handles DHCP for my home network. Each computer on my home network has its own listening port as I need to access different home computers while away from my home on business. The IP addressing scheme is: 192.168.x.xxx:3390. 3390 is the listening port of the computer on which Filezilla Server is installed. My own home router has Port Forwarding enabled and set up correctly.
From the domain, Filezilla Client has already been used to connect to 3rd Party software vendors with whom I must transfer/received files occasionally. Because of this, I feel the client software is already configured correctly. In Filezilla Client, I'm using the Static IP address (208.xx.xx.xxx) in the "Host Name" field. Username and Password fields are populated with the Windows 7 Home PC Username and Password. I'm not sure what to put into the "Port" field, although I've tried the default 14147, 21, 3390 (listening Port of home PC), but nothing works.
I do receive "Connected to Server, waiting for Welcome Message", but no connection is ever established.