An IDS/IPS (Intrusion Detection/Prevention System) monitors all communications

An intrusion detection/prevention system (IDS, IPS) serves either as a 'smoke detector' (passive role) or as a 'sprinkler' (active role) in the management of suspicious events.

An IDS that is well configured and is regularly analysed ensures a better detection of dangerous incidents. An IPS goes further and launches mitigation actions to counter incidents.