I debuged jboss-logging-3.1.2.GA-sources.jar and found that by default, jboss use JDK logger!
By default, JDK Logger takes $JAVA_HOME/jre/lib/logging.properties as configuragtion file.
We can pass configuration file to JDK through System property "java.util.logging.config.file".
Note: JDK Logger Lever is different with JBoss logging and log4j:
FINEST, FINER, FINE, CONFIG, INFO, WARNING, ERROR