The Aerospace Corporation has sponsored a series of projects focusing on issues in intrusion detection in computer networks. The Intrusion Detection Working Group of the Internet Engineering Task Force (a standards body) is developing a common XML message format for communicating intrusion detection events, called the Intrusion Detection Message Exchange Format (IDMEF). We have designed and implemented a web-accessible database-driven application to display, manage, and facilitate the manual correlation of IDMEF messages.