conn-timeout
This allows you to control how long the server should wait when it waits
for a passive FTP data connection to be established from the remote client,
or how long it waits when it tries to connect to the remote client for
an active FTP data connection.
The value is specified in seconds, and must be greater than zero.
Other timeout values you can configure are the data transfer block timeout
(xfer-timeout) and the control connection
idle timeout (idle-timeout).
Examples:
conn-timeout=135
conn-timeout=15
Recommendation: