You can enter the firewall/proxy server's address either as the hostname, e.g. ourfirewall, or as a dotted IP address, e.g. 192.186.100.123
Port
Enter the port that the firewall uses for FTP. This is usually 21. If this doesn't work check with your network/firewall administrator.
Username
If your firewall needs a logon, enter your username here. Only enabled for some firewall types.
Password
If your firewall needs a password, enter your password here. Only enabled for some firewall types.
Firewall type
Select your firewall type from the eight options. WinProxy and WinGate are two of the most commonly used and are frequently set up as "USER with no logon". If you're unsure of your firewall type, check with your network/firewall administrator, or if that's not possible try them all until you find the one that works.