Crowdsec is an open-source, lightweight software, detecting peers with aggressive behaviors to prevent them from accessing your systems. Its user friendly design and assistance offers a low technical barrier of entry and nevertheless a high security gain. Scans logs for signs of activity. Matches signs to local and crowdsourced attack signs. If a response agent is integrated with the service, it will react to the attack. Signs are also contributed back to the project to aid the community. Interactive setup and configuration. Designed not to need fine tuning to be effective.