THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
FtpServer Logging
FTP Server FtpServer uses Commons Logging SLF4J throughout its internal code allowing the developer to choose a logging configuration that suits their needs, e.g java.util.logging or Log4J. Commons Logging SLF4J provides FTP Server FtpServer the ability to log hierarchially hierarchically across various log levels without needing to rely on a particular logging implementation.
...
If you need to setup detailed logging from within FTP Server's code, then you can use a simple log4j configuration. Note that this logging can be very verbose depending on the log level you chose to use. The log4j jar is bundled with the binary distribution. This is an optional jar file. If you remove this jar file, other logging implementation will be autometically selected by the commons-logging.
The log4j configuration file location is <INSTALL_DIR>/common/classes/log4j.properties. You can modify this file to configure log4j.
...
You should consult the log4j documentation for more options.
java.util.logging
In order to configure JDK logging you should have JDK 1.4+. In the JDK's logging.properties file. Check your JAVA_HOME environment setting to see which JDK FTP Server is using. The file will be in $JAVA_HOME/jre/lib. Alternately, it can also use a global configuration file located elsewhere by using the system property java.util.logging.config.file, or programmatic configuration using java.util.logging.config.class.
The default logging.properties specifies a ConsoleHandler for routing logging to stdout and also a FileHandler. A handler's log level threshold can be set using SEVERE, CONFIG, INFO, WARN, FINE, FINEST or ALL. The logging.properties shipped with JDK is set to INFO. Please refer to Sun's java.util.logging documentation for the complete details.