1. A method for detecting intrusion in a computer system having one or more client computers and a data storage array, wherein the data storage array comprises a plurality of mass storage devices and wherein the one or more client computers communicate with the data storage array over a first network, the method comprising the steps of: loading a configuration file identifying one or more files to be monitored on a data storage array and a current state of respective one or more files; accessing a baseline file providing a most recent state of one or more files of the data storage array; determining that a most recent state of at least one of the one or more identified files to be monitored is not included in the baseline file; creating an entry in the baseline file for the at least one of the one or more identified files; determining that a most recent state of at least one of the one or more identified files to be monitored has changed; replacing the most recent state of the at least one of the one or more identified files provided in the baseline file that has changed with the current state provided in the configuration file in association with the at least one of the one or more identified files; monitoring, by a platform, disk structures of the data storage array through a connection to a local adapter of the data storage array in order to detect a change in one or more of the disk structures, wherein the platform is not connected to the one or more client computers, wherein monitoring comprises: comparing a current state of each identified file to be monitored to the most recent state provided in the baseline file in association with the identified file; producing a change event indication if the monitoring indicates that one or more of the identified files have changed; and producing an intrusion indication in response to a change event indication if it is determined that a rule in a rule set database has been satisfied, wherein a rule in the rule set database includes that more than a predetermined threshold number of files have changed within a predetermined threshold time interval.