This document discusses securing JMX access to Apache ActiveMQ. It describes how to access ActiveMQ through JMX without security by default. It then outlines the steps needed to enable security, which includes updating configuration files like jmx.access and jmx.password to add credentials, restricting permissions on jmx.password, disabling the ActiveMQ JMX connector, and modifying activemq.bat to specify the new configuration. With these changes, JMX access will require valid credentials instead of being open without security.