HIDS (Host Intrusion Detection System) will detect an attack, but will not prevent or stop it. They will keep record of the attack, and can be set to notify an administrator that an attack has happened.
An intrusion detection system (IDS) is a device or software application that monitors a network or systems for malicious activity or policy violations. Any detected activity or violation is typically reported either to an administrator or collected centrally using a security information and event management (SIEM) system. A SIEM system combines outputs from multiple sources, and uses alarm filtering techniques to distinguish malicious activity from false alarms.
There is a wide spectrum of IDS, varying from …