Troubleshooting the ASA 5585-X IPS SSP

Appendix E Troubleshooting

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.

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

Note Before troubleshooting the ASA 5585-X IPS SSP, check the Caveats section of the Readme for the software version installed on your sensor to see if you are dealing with a known issue.

This section contains troubleshooting information specific to the ASA 5585-X IPS SSP, and contains the following topics:

•Failover Scenarios, page E-74

•Traffic Flow Stopped on IPS Switchports, page E-76

•Health and Status Information, page E-76

•The ASA 5585-X IPS SSP and the Normalizer Engine, page E-79

•The ASA 5585-X IPS SSP and Jumbo Packet Frame Size, page E-80

•The ASA 5585-X IPS SSP and Jumbo Packets, page E-80

•Health and Network Security Information, page E-81

Failover Scenarios

The following failover scenarios apply to the ASA 5585-X in the event of configuration changes, signature/signature engine updates, service packs, and SensorApp crashes on the ASA 5585-X IPS SSP.

Single ASA 5585-X in Fail-Open Mode

•If the ASA is configured in fail-open mode for the ASA 5585-X IPS SSP, and the

ASA 5585-X IPS SSP experiences a configuration change or signature/signature engine update, traffic is passed through the ASA without being inspected.

	Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1
E-74	OL-24002-01

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.

Cisco Systems IPS4520K9 manual Troubleshooting the ASA 5585-X IPS SSP

Models: IPS4520K9

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