The Aerospace Corporation has sponsored a series of projects focusing on issues in intrusion detection. The Intrusion Detection Working Group (IDWG) of the Internet Engineering Task Force (IETF, a standards body) has been developing a common method of communicating intrusion detection events. This consists of two parts, a transport protocol and a message format. In this project, the Clinic team has been assisting in the development, implementation, and evaluation of two proposed transport protocols.