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Cisco Systems IPS4520K9 Gathering Information, ASA 5585-X IPS SSP and Jumbo Packet Frame Size

Models: IPS4520K9

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Appendix E Troubleshooting

Gathering Information

For More Information

For detailed information about the Normalizer engine, see Normalizer Engine.

The ASA 5585-X IPS SSP and Jumbo Packet Frame Size

Refer to the following URL for information about ASA 5585-X IPS SSP jumbo packet frame size:

http://www.cisco.com/en/US/docs/security/asa/asa84/configuration/guide/interface_start.html#wp1328 869

Note A jumbo frame is an Ethernet packet that is larger than the standard maximum of 1518 bytes (including Layer 2 header and FCS).

The ASA 5585-X IPS SSP and Jumbo Packets

The jumbo packet count in the show interface command output from the lines Total Jumbo Packets Received and Total Jumbo Packets Transmitted for ASA IPS modules may be larger than expected due to some packets that were almost jumbo size on the wire being counted as jumbo size by the IPS.

This miscount is a result of header bytes added to the packet by the ASA before the packet is transmitted to the IPS. For IPv4, 58 bytes of header data are added. For IPv6, 78 bytes of header data are added. The ASA removes the added IPS header before the packet leaves the ASA.

TCP Reset Differences Between IPS Appliances and ASA IPS Modules

The IPS appliance sends TCP reset packets to both the attacker and victim when Reset TCP Connection is selected. The IPS appliance sends a TCP reset packet only to the victim under the following circumstances:

•When a Deny Packet Inline or Deny Connection Inline is selected

•When TCP-based signatures and Reset TCP Connection have NOT been selected

In the case of the ASA IPS module, the TCP reset request is sent to the ASA, and the ASA then sends the TCP reset packets. The ASA sends TCP reset packets to both the attacker and victim when the Reset TCP Connection is selected. When Deny Packet Inline or Deny Connection Inline is selected, the ASA sends the TCP reset packet to either the attacker or victim depending on the configuration of the signature. Signatures configured to swap the attacker and victim when reporting the alert can cause the ASA to send the TCP reset packet to the attacker.

For More Information

For detailed information about event actions, refer to Event Actions.

Gathering Information

You can use the following CLI commands and scripts to gather information and diagnose the state of the sensor when problems occur. You can use the show tech-supportcommand to gather all the information of the sensor, or you can use the other individual commands listed in this section for specific information.

 

Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1

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OL-24002-01

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Cisco Systems IPS4520K9 manual Gathering Information, ASA 5585-X IPS SSP and Jumbo Packet Frame Size
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IPS4520K9 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.