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Cisco IPS (global correlation) is downloading lots of updates from the iron-port website

Unanswered Question
May 13th, 2014
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I have query on Global correlation.
 
Following is the observed behavior
 
Scenario 1:
 
Global Correlation Inspection: ON (Standard)
Reputation Filter: ON
Result: Global correlation downloads in bytes or KBs (observed on proxy)

Scenario 2:
 
Global Correlation Inspection: OFF
Reputation Filter: ON
Result: Global correlation downloads 4-5 MB every 5 Minutes (observed on proxy)
 
 
This behavior has been observed on both IPS devices one by one. What we wanted the clarity on is why is does global correlation download so much of data when it is OFF, and downloads only minimal data when ON. The equation does not seem to be right.

 

Request you for your prompt response.

Regards,

Neal

 

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anil.gupta3 Wed, 05/21/2014 - 23:14
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Request forum member to please help on the question..

Any help is welcome..

Regards,

Neal

jason.loera Tue, 05/27/2014 - 10:23
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Both global correlation and reputation filtering retrieve updates from the SensorBase network, or IronPort. By default, they communicate with the network every five minutes. This value cannot be changed by the IPS administrator.

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