Appendix B Signature Engines

String Engines

Table B-33lists the parameters specific to the String ICMP engine.

Table B-33

String ICMP Engine Parameters

 

 

 

 

 

Parameter

 

Description

Value

 

 

 

 

direction

 

Specifies the direction of the traffic:

from-service

 

 

• Traffic from service port destined to client

to-service

 

 

port.

 

 

 

• Traffic from client port destined to service

 

 

 

port.

 

 

 

 

 

icmp-type

 

Specifies the value of the ICMP header TYPE.

0 to 181

 

 

 

a-b[,c-d]

 

 

 

 

regex-string

 

The Regex pattern to use in the search.

string

 

 

 

specify-exact-match-offset

(Optional) Enables exact match offset:

0 to 65535

{yes no}

 

• exact-match-offset—Specifies the exact

 

 

 

 

 

 

stream offset the regular expression string

 

 

 

must report for a match to be valid.

 

 

 

 

specify-min-match-

(Optional) Enables minimum match length:

0 to 65535

length {yes no}

• min-match-length—Specifies the minimum

 

 

 

 

 

 

number of bytes the regular expression

 

 

 

string must match.

 

 

 

 

swap-attacker-victim

Swaps the attacker and victim addresses and

true false (default)

 

 

ports (source and destination) in the alert

 

 

 

message and in any actions taken.

 

 

 

 

 

1. The second number in the range must be greater than or equal to the first number.

Table B-34lists the parameters specific to the String TCP engine.

Table B-34

String TCP Engine

 

 

 

 

 

 

Parameter

 

Description

Value

 

 

 

 

direction

 

Specifies the direction of the traffic:

from-service

 

 

•

Traffic from service port destined to client

to-service

 

 

 

port.

 

 

 

•

Traffic from client port destined to service

 

 

 

 

port.

 

 

 

 

 

regex-string

 

The Regex pattern to use in the search.

string

 

 

 

 

service-ports

 

Specifies a comma-separated list of ports or port

0 to 655351

 

 

ranges where the target service resides.

a-b[,c-d]

 

 

 

specify-exact-match-offset

(Optional) Enables exact match offset:

0 to 65535

{yes no}

 

•

exact-match-offset—Specifies the exact

 

 

 

 

 

 

 

stream offset the regular expression string

 

 

 

 

must report for a match to be valid.

 

 

 

 

 

 

 

 

Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2

 

 

 

 

 

 

 

OL-29168-01

 

 

B-63

 

 

 

 

 

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Cisco Systems IPS4510K9 manual Table B-33 String Icmp Engine Parameters
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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.

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