Intrusion Prevention System (IPS) monitors network traffic for potential threats and automatically takes action to block them by alerting the security team, terminating dangerous connections, removing malicious content, or triggering other security devices.

IPS threat detection methods
Signature-based detection
Anomaly-based detection
Policy-based detection
IPS threat prevention methods
An IPS may end a user's session, block a specific IP address, or even block all traffic to a target. Some IPSs can redirect traffic to a honeypot, a decoy asset that makes the hackers think they've succeeded when, really, the SOC is watching them.

“Intrusion Prevention System,” a critical component of network security. An Intrusion Prevention System is designed to monitor network and/or system activities for malicious or unwanted behavior and can take proactive steps to prevent or block those activities. Here are some key features and functionalities associated with IPS:

  1. Traffic Inspection:
    • IPS monitors network traffic in real-time, analyzing the data packets for signs of malicious activity or patterns that match known attack signatures.
  2. Signature-Based Detection:
    • Utilizes a database of known attack signatures to identify and block malicious traffic. These signatures are patterns or characteristics that are indicative of specific types of attacks.
  3. Anomaly-Based Detection:
    • Examines deviations from established baselines to identify abnormal network behavior. Unusual patterns or activities that deviate from the norm may trigger alerts or automatic prevention measures.
  4. Protocol Analysis:
    • Analyzes network protocols to detect anomalies or misuse of protocol specifications, which could indicate an attempted exploit.
  5. Content Inspection:
    • Inspects the content of network packets, looking for malicious code, malware, or other indicators of compromise.
  6. Policy Enforcement:
    • Enforces security policies defined by the organization, such as blocking certain types of traffic or specific applications.
  7. Deep Packet Inspection:
    • Examines the entire content of a packet, including the payload, to detect and prevent threats at a granular level.
  8. Vulnerabili0ty Mitigation:
    • Identifies and blocks attempts to exploit known vulnerabilities in applications or systems.
  9. Rate Limiting and Traffic Shaping:
    • Controls the rate of incoming and outgoing network traffic to prevent network congestion and protect against certain types of DoS (Denial of Service) attacks.
  10. Automatic Response:
    • In some cases, IPS can automatically respond to detected threats by blocking or isolating malicious traffic, helping to contain the impact of an attack.
  11. Logging and Reporting:
    • Captures information about detected threats, actions taken, and other relevant details for later analysis, auditing, and reporting.
  12. Integration with Security Information and Event Management (SIEM):
    • Works in conjunction with SIEM systems to provide a centralized view of security events and facilitate correlation of information for more effective threat detection and response.
  13. SSL/TLS Decryption:
    • Decrypts encrypted traffic to inspect the content for potential threats, ensuring that malicious activities are not concealed within encrypted communications.

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