To start up WebLogic with remote JMX access enabled:

JAVA_OPTIONS="-Dcom.sun.management.jmxremote.port=12347"
JAVA_OPTIONS="${JAVA_OPTIONS} -Dcom.sun.management.jmxremote.authenticate=false"
JAVA_OPTIONS="${JAVA_OPTIONS} -Dcom.sun.management.jmxremote.ssl=false"
export JAVA_OPTIONS