Logging Options
vsftpd_log_file

This option is the name of the file to which we write the vsftpd style log file.

This log is only written if the option xferlog_enable is set, and xferlog_std_format is NOT set.

Alternatively, it is written if you have set the option dual_log_enable.

One further complication - if you have set syslog_enable, then this file is not written and output is sent to the system log instead.

default=/var/log/vsftpd.log