Appendix B Signature Engines

Master Engine

Note The Regex accelerator card is used for both the standard String engines and the String XL engines. Most standard String engine signatures can be compiled and analyzed by the Regex accelerator card without modification. However, there are special circumstances in which the standard String engine signatures cannot be compiled for the Regex accelerator card. In these situations a new signature is written in a String XL engine using the specific parameters in the String XL engine that do compile on the Regex accelerator card. The new signature in the String XL engine obsoletes the original signature in the standard String engine.

•Sweep—Analyzes sweeps from a single host (ICMP and TCP), from destination ports (TCP and UDP), and multiple ports with RPC requests between two nodes. There are two Sweep engines: Sweep and Sweep Other TCP.

•Traffic Anomaly—Inspects TCP, UDP, and other traffic for worms.

•Traffic ICMP—Analyzes nonstandard protocols, such as TFN2K, LOKI, and DDOS. There are only two signatures with configurable parameters.

•Trojan—Analyzes traffic from nonstandard protocols, such as BO2K andTFN2K. There are three Trojan engines: Bo2k, Tfn2k, and UDP. There are no user-configurable parameters in these engines.

For More Information

For a list of the signature regular expression syntax, see Regular Expression Syntax, page B-9.

Master Engine

The Master engine provides structures and methods to the other engines and handles input from configuration and alert output. This section describes the Master engine, and contains the following topics:

•General Parameters, page B-4

•Alert Frequency, page B-7

•Event Actions, page B-8

General Parameters

The following parameters are part of the Master engine and apply to all signatures (if it makes sense for that signature engine). Table B-1lists the general master engine parameters.

Table B-1

Master Engine Parameters

 

 

 

 

 

Parameter

 

Description

Value

 

 

 

 

signature-id

 

Specifies the ID of this signature.

number

 

 

 

sub-signature-id

Specifies the sub ID of this signature

number

 

 

 

 

Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2

 

B-4

OL-29168-01

 

 

 

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Cisco Systems IPS4510K9 manual Master Engine, General Parameters, Parameter Description Value
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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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