Add the passive port definitions to the bottom of your /etc/vsftpd.conf :
Orange provides a robust infrastructure that supports various professional communication needs. While newer technologies like cloud networking and APIs are taking over, FTP remains a reliable standard for:
Corporate Data Hosting: Orange Business Services often provides dedicated server environments for international corporations. These servers frequently use FTP or its secure variants (SFTP/FTPS) to allow employees and partners across the globe to sync large datasets, such as marketing assets, financial reports, or software updates.
Orange Communication FTP: Secure File Transfer Solutions for Business