Stateful Firewall Thresholds


Stateful Firewall Thresholds
 
 
Thresholds generate alerts or alarms based on either the total number of Stateful Firewall calls setup by the system during the specified polling interval, or on the number of currently active calls only.
Alerts or alarms are triggered for call setups based on the following rules:
Enter condition: Actual number of call setups > or = High Threshold
Clear condition: Actual number of call setups < Low Threshold.
If a trigger condition occurs within the polling interval, the alert or alarm will not be generated until the end of the polling interval.
Default value is 0, which means there will be no monitoring.
The polling interval is in seconds and it is an integer between 30 and 60000. Entries will be rounded up to the nearest 30 seconds.
 
Configuring Stateful Firewall Thresholds
This section describes how to enable and configure Stateful Firewall thresholds.
 
Enabling Thresholds
To enable thresholds use the following configuration:
configure
  threshold monitoring firewall
  end
 
Configuring Threshold Polling Intervals
To configure threshold poll interval use the following configuration:
configure
  threshold poll fw-deny-rule interval <interval>
  threshold poll fw-dos-attack interval <interval>
  threshold poll fw-drop-packet interval <interval>
  threshold poll fw-no-rule interval <interval>
  end
 
Configuring Thresholds Limits
To configure threshold limits use the following configuration:
configure
  threshold fw-deny-rule <high_thresh> [ clear <low_thresh> ]
  threshold fw-dos-attack <high_thresh> [ clear <low_thresh> ]
  threshold fw-drop-packet <high_thresh> [ clear <low_thresh> ]
  threshold fw-no-rule <high_thresh> [ clear <low_thresh> ]
  end
 
Saving Your Configuration
When you configure thresholds they are not permanent unless you save the changes. When you have completed configuring thresholds, save your configuration as described in the Verifying and Saving Your Configuration chapter.
 
 

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