There are two modes in FTP communications: Active and Passive. In Active mode, the FTP server will attempt to connect back to a port on the
Managed File Transfer
FTP client in order perform the data transfer. The challenge with Active mode is that your firewall may block the FTP server from trying to open a port back into your network. In Passive mode, the FTP server does not need to connect back to a port on the
Managed File Transfer
FTP client, which is a more firewall-friendly mode. Therefore, if you have problems with connecting to the FTP server, you may want to change the mode on the FTP server resource to Passive.