Chapter 7 Defining Signatures

Configuring Signatures

–request-rate-limit—Sends a rate limit request to the ARC to perform rate limiting.

–request-snmp-trap—Sends a request to the Notification Application component of the sensor to perform SNMP notification.

–reset-tcp-connection—Sends TCP resets to hijack and terminate the TCP flow.

–modify-packet-inline— Modifies packet data to remove ambiguity about what the end point might do with the packet.

–

•event-action-settings—Enables the external-rate-limit-type:

–none—No rate limiting configured.

–percentage—Specifies the rate limit by traffic percentage (external-rate-limit-percentage).

Configuring Event Actions

To configure event actions and event action settings for a signature, follow these steps:

Step 1 Log in to the CLI using an account with administrator privileges.

Step 2 Enter signature definition mode.

sensor# configure terminal

sensor(config)# service signature-definition sig0

sensor(config-sig)#

Step 3 Specify the signature you want to configure.

sensor(config-sig)# signatures 1200 0

Step 4 Specify the signature engine (for signature 1200 it is the Normalizer engine).

sensor(config-sig-sig)# engine normalizer

Step 5 Configure the event action.

sensor(config-sig-sig-nor)#event-action produce-alertrequest-snmp-trap

Note Each time you configure the event actions for a signature, you overwrite the previous configuration. For example, if you always want to produce an alert when the signature is fired, you must configure it along with the other event actions you want. Use the symbol to add more than one event action, for example, product-alertdeny-packet-inlinerequest-snmp-trap.

Step 6 Verify the settings.

sensor(config-sig-sig-nor)# show settings

normalizer

-----------------------------------------------

event-action: produce-alertrequest-snmp-trap default:

produce-alertdeny-packet-inline

Step 7 Specify the percentage for rate limiting.

sensor(config-sig-sig-nor)# event-action-settingssensor(config-sig-sig-nor-eve)# external-rate-limit-type percentage sensor(config-sig-sig-nor-eve-per)# external-rate-limit-percentage 50

Step 8 Verify the settings.

sensor(config-sig-sig-nor-eve-per)# show settings

 

Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2

7-16

OL-29168-01

Page 199 Page 201
Page 200
Image 200
Cisco Systems IPS4510K9 Configuring Event Actions, Configure the event action, Specify the percentage for rate limiting
Page 199 Page 201

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.
Top Page Image Contents