By default vsftpd will use passive mode for transferring:
# man vsftpd pasv_enable Set to NO if you want to disallow the PASV method of obtaining a data connection. Default: YES
If the user wants to customize the ports information used, or to enable active mode, then do the following:
1. modify /etc/vsftpd/vsftpd.conf and add below lines:
pasv_enable=NO pasv_min_port=49152 pasv_max_port=65534
2. Restart the vsfptd service for the above configuration to take effect.
# service vsftpd restart