Configuring Global Variables

Chapter 5 Configuring Virtual Sensors

Use the global-parameterscommand in service analysis engine submode to create global variables, such as IP logging, service activity, and specifying the flow depth. Flow depth is used for String, Multi-String, Service HTTP, and State engines. It does not apply to the XL String engine and the platforms that support it.

Note The IPS 4345, IPS 4360, IPS 4510, IPS 4520, ASA 5525-X IPS SSP, ASA 5545-X IPS SSP, ASA 5555-X IPS SSP, and ASA 5585-X IPS SSP support the String XL engines and the Regex accelerator card.

The following options apply:

•ip-logging—Enables global IP logging parameters.

–max-open-iplog-files—Specifies the maximum number of concurrently open log files. The range is 20 to 100. The default is 20.

•serviceActivity—Lets you gather information about service activities for diagnostic purposes. The details are more granular and have port level details.

Note Enabling service activity impacts system performance. Enable service activity collection temporarily for diagnostic purposes only. You must reboot the sensor after you enable service activity for the change to take affect.

–enable-serviceactivity [1 0]—Set to 1 to enable, set to 0 to disable. The default is disabled.

–serviceActivityLimit limit—Sets the limit for how many services you want to enable. The valid range is from 10 to 65536. The default is 15.

•specify-flow-depth—Lets you specify the inspection depth of the flow. Flow depth is the number of bytes inspected in a flow. The new value applies for new flows only. The valid range is from 0 to 429496296. The default is 0, which is infinitive.

Creating a Global Variable

To create a global variable, follow these steps:

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

Step 2 Enter service analysis mode.

sensor# configure terminal

sensor(config)# service analysis-engine

sensor(config-ana)#

Step 3 Create the variable for the maximum number of open IP logs.

sensor(config-ana)# global-parameterssensor(config-ana-glo)# ip-loggingsensor(config-ana-glo-ip)# max-open-iplog-files 50 sensor(config-ana-glo-ip)# exit sensor(config-ana-glo)#

Step 4 Create the flow depth variable.

sensor(config-ana-glo)# specify-flow-depth 500 sensor(config-ana-glo)# exit

	Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
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IPS4510K9 specifications

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Cisco Systems IPS4510K9 manual Configuring Global Variables, Creating a Global Variable

Models: IPS4510K9

Creating a Global Variable

Step 3 Create the variable for the maximum number of open IP logs.

Step 4 Create the flow depth variable.

OL-29168-01

IPS4510K9 specifications