Connecting Filezilla to FTP Servers Behind a NAT Router (the Easy Way)

Having trouble connecting Filezilla to an FTP server that's behind a NAT router? If it connects, but then gives a "Failed to retrieve directory listing" error, then you have likely hit a classic NAT router problem.
In this video Hans explains what goes wrong and, more importantly, an easy way to "fix" it. Enabling a hidden Filezilla feature will enable you to successfully connect to the FTP server.
Click the link below for a summary:
keasigmadelta....
Check out the FTP server I used for testing:
keasigmadelta.com/zitaftpserver
NOTE: This also works for virtual NAT routers, which you may encounter if you're server is running on a Virtual Machine (VM) or emulator (e.g., Qemu).