This document discusses a tabu search based fuzzy system for intrusion detection. It begins with an introduction to intrusion detection systems and their purpose of monitoring for malicious activities and policy violations. It then describes the key components of the proposed system, including fuzzy logic to handle partial truths, tabu search to guide the local search through previously visited solutions, and modules for initialization, evaluation, generation, acceptance and termination. The system aims to effectively classify intrusions using tabu search to explore the large solution space.