/aɪ.piː.ɛs/
noun — "the security guard that stops attacks in their tracks."
IPS, short for Intrusion Prevention System, is a network security device or software that monitors traffic for malicious activity and takes immediate action to block or prevent threats. Unlike IDS, which only detects and alerts, an IPS actively intervenes to stop attacks, unauthorized access, and malware in real time.
Technically, IPS can operate using signature-based detection, anomaly-based detection, or a combination of both. It integrates with firewalls (Firewall), VPNs (VPN), and SIEM systems to enforce security policies, prevent intrusions, and maintain network integrity.
Key characteristics of IPS include:
- Active blocking: prevents attacks as they occur.
- Detection: identifies threats using signatures and behavior analysis.
- Policy enforcement: integrates with firewalls and VPNs for comprehensive security.
- Real-time response: stops unauthorized activity immediately.
- Reporting: generates logs and alerts for auditing and analysis.
In practical workflows, IPS devices are deployed alongside firewalls and IDS to protect networks, servers, and critical applications from malware, intrusion attempts, and other malicious activities.
Conceptually, an IPS is like a security guard who not only spots intruders but physically blocks them from entering the building.
Intuition anchor: IPS actively defends networks by stopping attacks before they cause damage.