Understanding Reputation and Risk Rating

Chapter 10 Configuring Global Correlation

Risk rating is the concept of the probability that a network event is malicious. You assign a numerical quantification of the risk associated with a particular event on the network. By default, an alert with an extreme risk rating shuts down traffic. Reputation indicates the probability that a particular attacker IP address will initiate malicious behavior based on its known past activity. A certain score is computed for this reputation by the Alarm Channel and added to risk rating, thus improving the efficacy of the IPS. When the attacker has a bad reputation score, an incremental risk is added to the risk rating to make it more aggressive.

The Alarm Channel handles signature events from the data path. The alert processing units have multiple aggregation techniques, action overrides, action filters, attacker reputation, and per-action custom handling methods. We use the large reputation data from the reputation participation client to score attackers in the Alarm Channel and then use this score to influence the risk rating and actions of the alert.

For More Information

•For a detailed description of risk rating, see Calculating the Risk Rating, page 8-13.

•For a detailed description of threat rating, see Understanding Threat Rating, page 8-14.

•For a detailed description of event action filters, see Configuring Event Action Filters, page 8-20.

•For a detailed description of the Alarm Channel, see Understanding the SensorApp, page A-23.

•For a detailed description of event action aggregation, see Understanding Event Action Aggregation, page 8-33.

Global Correlation Features and Goals

There are three main features of global correlation:

•Global Correlation Inspection—We use the global correlation reputation knowledge of attackers to influence alert handling and deny actions when attackers with a bad score are seen on the sensor.

•Reputation Filtering—Applies automatic deny actions to packets from known malicious sites.

•Network Reputation—Sensor sends alert and TCP fingerprint data to the SensorBase Network. Global correlation has the following goals:

•Dealing intelligently with alerts thus improving efficacy.

•Improving protection against known malicious sites.

•Sharing telemetry data with the SensorBase Network to improve visibility of alerts and sensor actions on a global scale.

•Simplifying configuration settings.

•Automatic handling of the uploads and downloads of the information.

	Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
10-6	OL-29168-01

IPS4510K9 specifications

Cisco Systems has long been a leading player in network security, and its IPS (Intrusion Prevention System) series is a testament to its commitment to safeguarding digital environments. Among its notable offerings are the IPS4510K9 and IPS4520K9 models, both designed to provide advanced threat protection for mid-sized to large enterprise networks.

The Cisco IPS4510K9 and IPS4520K9 are distinguished by their cutting-edge features that help organizations defend against a myriad of cyber threats. These systems utilize a multi-layered approach to security, integrating intrusion prevention, advanced malware protection, and comprehensive visibility across the network.

One of the primary characteristics of the IPS4510K9 is its high performance. It boasts a throughput of up to 1 Gbps, making it suitable for environments that demand rapid data processing and real-time responses to threats. The IPS4520K9, on the other hand, enhances that capability with improved throughput of up to 2 Gbps, accommodating larger enterprises with heavier network traffic. These models are equipped with powerful processors that support complex signature matching and can intelligently distinguish between legitimate traffic and potential threats.

In addition to performance, both models are designed with scalability in mind. They can be easily integrated into existing Cisco infrastructures. This facilitates a seamless enhancement of security without causing significant interruptions to ongoing operations. Moreover, they offer flexible deployment options, allowing organizations to operate them inline or out of band depending on their specific needs.

The Cisco IPS4510K9 and IPS4520K9 leverage advanced detection technologies, utilizing a variety of signature types and heuristic analysis to detect known and unknown threats effectively. They are equipped with real-time alerting and reporting capabilities, giving security teams immediate visibility into potential breaches and enabling them to respond swiftly.

Furthermore, both models support a range of management options through the Cisco Security Manager, allowing for centralized administration, streamlined policy management, and enhanced monitoring capabilities. Automated updates ensure the systems remain current with the latest threat intelligence, vital for staying ahead of evolving cyber threats.

In summary, the Cisco Systems IPS4510K9 and IPS4520K9 represent powerful solutions for organizations seeking robust intrusion prevention capabilities. With their high performance, scalability, and advanced detection technologies, these systems are essential tools in the ever-changing landscape of cybersecurity, providing enterprises with the peace of mind needed to operate securely in today's digital world.

Cisco Systems IPS4510K9 manual Understanding Reputation and Risk Rating, 10-6

Models: IPS4510K9