Appendix B Signature Engines

Atomic Engine

Only the outermost IP tunnel is identified. When an IPv6 tunnel or IPv6 traffic inside of an IPv4 tunnel is detected, a signature fires an alert. All of the other IPv6 traffic in embedded tunnels is not inspected. The following tunneling methods are supported, but not individually detected. For example, ISATAP, 6to4, and manual IPv6 RFC 4213 tunnels all appear as IPv6 in IPv4, which is detected by signature 1007:

•ISATAP

•6to4 (RFC 3056)

•Manually configured tunnels (RFC 4213)

•IPv6 over GRE

•Teredo (IPv6) inside UDP

•MPLS (unencrypted)

•IPv6 over IPv6

IPv6 supports the following:

•Denying by source IP address, destination IP address, or IP address pair

•Alerts

•Resetting the TCP connection

•Logging

Atomic IP Advanced Engine Restrictions

The Atomic IP Advanced engine contains the following restrictions:

•Cannot detect the Layer 4 field of the packets if the packets are fragmented so that the Layer 4 identifier does not appear in the first packet.

•Cannot detect Layer 4 attacks in flows with packets that are fragmented by IPv6 because there is no fragment reassembly.

•Cannot detect attacks with tunneled flows.

•Limited checks are provided for the fragmentation header.

•There is no support for IPv6 on the management (command and control) interface.

•If there are illegal duplicate headers, a signature fires, but the individual headers cannot be separately inspected.

•Anomaly detection does not support IPv6 traffic; only IPv4 traffic is directed to the anomaly detection processor.

•Rate limiting and blocking are not supported for IPv6 traffic. If a signature is configured with a block or rate limit event action and is triggered by IPv6 traffic, an alert is generated but the action is not carried out.

Note The second number in the ranges must be greater than or equal to the first number.

 

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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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