Chapter 10 Configuring Global Correlation

Configuring Global Correlation Inspection and Reputation Filtering

Understanding Global Correlation Inspection and Reputation Filtering

You can configure the sensor to use updates from the SensorBase Network to adjust the risk rating. The client determines which updates are available and applicable to the sensor by communicating with the global correlation update server and a file server, which is a two-phase process. In the first phase the sensor sends a client manifest to the global correlation update sever via an HTTPS POST request. The server then returns the server manifest document in the HTTPS response. In the next phase the sensor identifies the updates that are available and how to obtain them from a file server. The sensor downloads the encrypted update files via HTTP from the file server using the information in the server manifest. The integrity of these update files has been verified by comparing its MD5 hash with the hash value specified in the server manifest.

Figure 10-2demonstrates how the global correlation update client obtains the files.

Figure 10-2 Global Correlation Update Client

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Caution You must have a valid sensor license for global correlation features to function. You can still configure and display statistics for the global correlation features, but the global correlation databases are cleared and no updates are attempted. Once you install a valid license, the global correlation features are reactivated.

Once you configure global correlation, updates are automatic and happen at regular intervals, approximately every five minutes by default, but this interval may be modified by the global correlation server. The sensor gets a full update and then applies an incremental update periodically.

You configure an HTTP proxy or a DNS server in the service network-setting submode. If you turn on global correlation, you can choose how aggressively you want the deny actions to be enforced against malicious hosts. You can then enable reputation filtering to deny access to known malicious hosts. If you only want a report of what could have happened, you can enable test-global-correlation. This puts the sensor in audit mode, and actions the sensor would have performed are generated in the events.

Use the show health command in privileged EXEC mode to display the overall health status information of the sensor. The health status categories are rated by red and green with red being critical.

Caution As with signature updates, when the sensor applies a global correlation update, it may trigger bypass. Whether or not bypass is triggered depends on the traffic load of the sensor and the size of the signature/global correlation update. If bypass mode is turned off, an inline sensor stops passing traffic while the update is being applied.

 

 

Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2

 

 

 

 

 

 

OL-29168-01

 

 

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Cisco Systems IPS4510K9 manual 10-9, Global Correlation Update Client
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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.
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