Abstract: An intrusion detection and response system having an event data collector receiving a plurality of data sets from a respective and corresponding plurality of security devices. An event analysis engine receives the plurality of data sets and analyzes the data sets with reference to one of a plurality of pre-defined traffic classes. The event analysis engine produces a corresponding plurality of analyzed data sets. An event correlation engine receives the analyzed data sets and correlates the events across the plurality of security devices for identifying normal and abnormal data traffic patterns.