NcFTPd general.cf file configuration
Don't forget to restart NcFTPd after modifying the general.cf file.
If you want to force the user to wait a few seconds after a download or upload in active mode (using PORT rather than passive, PASV), then you can set this option to the number of seconds to wait.
This option is primarily useful to mitigate exhaustion of ephemeral port numbers, which is a problem in active mode but not in passive mode. By introducing a slight delay, you can enable users to transfer large numbers of small files in active mode.