Understanding the Service Engines

Appendix B Signature Engines

Service Engines

•Service NTP Engine, page B-52

•Service P2P Engine, page B-53

•Service RPC Engine, page B-53

•Service SMB Advanced Engine, page B-55

•Service SNMP Engine, page B-57

•Service SSH Engine, page B-58

•Service TNS Engine, page B-59

The Service engines analyze Layer 5+ traffic between two hosts. These are one-to-one signatures that track persistent data. The engines analyze the Layer 5+ payload in a manner similar to the live service.

The Service engines have common characteristics but each engine has specific knowledge of the service that it is inspecting. The Service engines supplement the capabilities of the generic string engine specializing in algorithms where using the string engine is inadequate or undesirable.

Service DNS Engine

The Service DNS engine specializes in advanced DNS decode, which includes anti-evasive techniques, such as following multiple jumps. It has many parameters, such as lengths, opcodes, strings, and so forth. The Service DNS engine is a biprotocol inspector operating on both TCP and UDP port 53. It uses the stream for TCP and the quad for UDP.

Table B-18lists the parameters specific to the Service DNS engine.

Table B-18	Service DNS Engine Parameters

Parameter		Description		Value

protocol		Specifies the protocol of interest for this		tcp
		inspector.		udp

specify-query-chaos-string {yes no}		(Optional) Enables the DNS Query Class		query-chaos-string
		Chaos String:
		•	query-chaos-string—Specifies the
			query chaos string to search on.

specify-query-class {yes no}		(Optional) Enables the query class:		0 to 65535
		• query-class—Specifies the DNS
			Query Class 2 Byte Value.

specify-query-invalid-domain-name		(Optional) Enables the query invalid		no yes
{yes no}		domain name:
		•	query-invalid-domain-name—Specifie
			s the DNS Query Length greater
			than 255.

	Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
B-40	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 the Service Engines, Service DNS Engine

Models: IPS4510K9