TCP Reset Interfaces

Chapter 1 Introducing the Sensor

How the Sensor Functions

This section explains the TCP reset interfaces and when to use them. It contains the following topics:

•Understanding Alternate TCP Reset Interfaces, page 1-11

•Designating the Alternate TCP Reset Interface, page 1-12

Understanding Alternate TCP Reset Interfaces

Note The alternate TCP reset interface setting is ignored in inline interface or inline VLAN pair mode, because resets are sent inline in these modes.

You can configure sensors to send TCP reset packets to try to reset a network connection between an attacker host and its intended target host. In some installations when the interface is operating in promiscuous mode, the sensor may not be able to send the TCP reset packets over the same sensing interface on which the attack was detected. In such cases, you can associate the sensing interface with an alternate TCP reset interface and any TCP resets that would otherwise be sent on the sensing interface when it is operating in promiscuous mode are instead sent out on the associated alternate TCP reset interface.

If a sensing interface is associated with an alternate TCP reset interface, that association applies when the sensor is configured for promiscuous mode but is ignored when the sensing interface is configured for inline mode. any sensing interface can serve as the alternate TCP reset interface for another sensing interface.

Note There is only one sensing interface on the ASA IPS modules (ASA 5500 AIP SSM,

ASA 5500-X IPS SSP, and ASA 5585-X IPS SSP), so you cannot designate an alternate TCP reset interface.

Table 1-3lists the alternate TCP reset interfaces.

	Table 1-3	Alternate TCP Reset Interfaces

	Sensor		Alternate TCP Reset Interface

	ASA 5500 AIP SSM-10		None

	ASA 5500 AIP SSM-20		None

	ASA 5500 AIP SSM-40		None

	ASA 5512-X IPS SSP		None

	ASA 5515-X IPS SSP		None

	ASA 5525-X IPS SSP		None

	ASA 5545-X IPS SSP		None

	ASA 5555-X IPS SSP		None

	ASA 5585-X IPS SSP-10		None

	ASA 5585-X IPS SSP-20		None

	ASA 5585-X IPS SSP-40		None

	ASA 5585-X IPS SSP-60		None

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

OL-24002-01				1-11

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.

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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 TCP Reset Interfaces, Sensor Alternate TCP Reset Interface

Models: IPS4520K9