Cisco Systems IPS4510K9 manual Creating an AIC Signature

Chapter 7 Defining Signatures

Configuring Signatures

Table 7-4	FTP Commands Signatures (continued)
Signature ID		FTP Command
12930		Define FTP command stru
12931		Define FTP command syst
12932		Define FTP command type
12933		Define FTP command user

For More Information

For the procedure for enabling signatures, see Configuring the Status of Signatures, page 7-13.

Creating an AIC Signature

Caution A custom signature can affect the performance of your sensor. Test the custom signature against a baseline sensor performance for your network to determine the overall impact of the signature.

The following example demonstrates how to create a MIME-type signature based on the AIC engine. The following options apply:

•event-action—Specifies the action(s) to perform when alert is triggered:

–deny-attacker-inline(inline only)—Does not transmit this packet and future packets from the attacker address for a specified period of time.

–deny-attacker-service-pair-inline(inline only)—Does not transmit this packet and future packets on the attacker address victim port pair for a specified period of time.

–deny-attacker-victim-pair-inline(inline only)—Does not transmit this packet and future packets on the attacker/victim address pair for a specified period of time.

–deny-connection-inline(inline only)—Does not transmit this packet and future packets on the TCP flow.

–deny-packet-inline(inline only)—Does not transmit this packet.

–log-attacker-packets—Starts IP logging of packets containing the attacker address.

–log-pair-packets—Starts IP logging of packets containing the attacker-victim address pair.

–log-victim-packets—Starts IP logging of packets containing the victim address.

–produce-alert—Writes the event to the Event Store as an alert.

–produce-verbose-alert—Includes an encoded dump (possibly truncated) of the offending packet in the alert.

–request-block-connection—Sends a request to the ARC to block this connection.

–request-block-host—Sends a request to the ARC to block this attacker host.

–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.

	Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
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