This document surveys various misbehavior detection approaches in Mobile Ad Hoc Networks (MANETs), highlighting the vulnerabilities that arise due to their decentralized, dynamic nature. It categorizes attacks into passive and active types and discusses various protection mechanisms, including techniques like Watchdog, Pathrater, and EAACK for detecting misbehavior. The paper emphasizes the need for effective Intrusion Detection Systems specifically tailored for MANETs due to their unique characteristics and challenges.