Appendix B Signature Engines

Service Engines

Table B-29

Service SNMP Engine Parameters (continued)

 

 

 

 

 

Parameter

 

Description

Value

 

 

 

non-snmp-traffic-inspection

Inspects for non-SNMP traffic destined

 

 

for UDP port 161.

 

 

 

 

snmp-inspection {yes no}

Enables inspection of SNMP traffic:

object-id

 

 

specify-object-id—Enables

community-name

 

 

inspection of the SNMP Object

 

 

 

identifier:

 

 

 

object-id—Specifies to search

 

 

 

for the SNMP object identifier.

 

 

 

specify-community-name—Enablesi

 

 

 

nspection of the SNMP community

 

 

 

name:

 

 

 

community-name—Specifies

 

 

 

to search for the SNMP

 

 

 

community name (SNMP

 

 

 

password).

 

 

 

 

 

For More Information

For more information on the parameters common to all signature engines, see Master Engine, page B-4.

Service SSH Engine

The Service SSH engine specializes in port 22 SSH traffic. Because all but the setup of an SSH session is encrypted, the Service SSH engine only looks at the fields in the setup. There are two default signatures for SSH. You can tune these signatures, but you cannot create custom signatures.

Table B-30lists the parameters specific to the Service SSH engine.

 

 

 

 

Table B-30

Service SSH Engine Parameters

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

Description

Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

length-type

 

Inspects for one of the following SSH length types:

0 to 65535

 

 

 

 

 

 

 

key-length—Enables inspection of the length of the

 

 

 

 

 

 

 

 

SSH key:

 

 

 

 

 

 

 

 

length—Specifies that keys larger than this fire the

 

 

 

 

 

 

 

 

RSAREF overflow.

 

 

 

 

 

 

 

 

user-length—Enables user length SSH inspection:

 

 

 

 

 

 

 

 

length—Specifies that keys larger than this fire the

 

 

 

 

 

 

 

 

RSAREF overflow.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

service-ports

 

Specifies a comma-separated list of ports or port ranges

0 to 655351

 

 

 

 

 

 

 

where the target service resides.

a-b[,c-d]

 

 

 

 

 

 

 

 

 

 

 

 

 

specify-packet-depth

(Optional) Enables packet depth:

0 to 65535

 

 

 

 

 

{yes no}

 

packet-depth—Specifies the number of packets to

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

watch before determining the session key was missed.

 

 

 

 

 

 

 

 

 

 

 

 

 

Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2

 

 

 

 

 

 

 

 

B-58

 

 

 

 

 

OL-29168-01

 

 

 

 

 

 

 

 

Page 668
Image 668
Cisco Systems IPS4510K9 manual Service SSH Engine, Specify-object-id-Enables

IPS4510K9 specifications

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