How to fix “Can’t open data connection for transfer of “/”” error when connecting to a FTP server with Filezilla server.

1. Change Filezilla server setting
   Settings -> Passive mode settings -> Use custom port range
   6000-6010
2. Create a new inbound rule in Windows Firewall for above port range

Reference:

• http://my-fish-it.blogspot.tw/2011/07/ss-filezilla-server-ftp.html
• https://serverfault.com/questions/836032/filezilla-server-425-cant-open-data-connection-for-transfer-of