Definition
Intrusion Detection Systems IDS and Intrusion Prevention Systems IPS are network security technologies designed to monitor network traffic for malicious activity or policy violations. An IDS passively analyzes traffic, alerting administrators to potential threats, while an IPS actively intervenes, blocking or preventing detected threats in real time. These systems are crucial for maintaining network integrity and protecting sensitive data from unauthorized access and cyberattacks. For instance, an IDS might flag a port scan, while an IPS could automatically block the source IP address performing the scan. Unlike a firewall that controls access based on predefined rules, IDS/IPS analyze traffic patterns for suspicious behavior. Understanding IDS/IPS concepts is essential for domains like network security and incident response, appearing in certifications such as CompTIA Security+ and CySA+.