Cisco Systems IPS4510K9 manual Configuring Event Actions, Configure the event action

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