Anomaly List; Configuring An Anomaly - Fortinet FortiGate FortiGate-1000A Administration Manual

IPS

Anomaly list

Configuring an anomaly

FortiGate-1000A/FA2 Administration Guide
You can enable or disable logging for each anomaly, and you can control the IPS
action in response to detecting an anomaly. In many cases you can also configure the
thresholds that the anomaly uses to detect traffic patterns that could represent an
attack.
Note: It is important to know the normal and expected traffic on your network before changing
the default anomaly thresholds. Setting the thresholds too low could cause false positives, and
setting the thresholds too high could miss some attacks.
You can also use the command line interface (CLI) to configure session control based
on source and destination network address. See
The anomaly detection list can be updated only when the FortiGate firmware image is
upgraded.
This section describes:
• Anomaly list
• Configuring an anomaly
Figure 156:The Anomaly list
Name The anomaly names.
Enable The status of the anomaly. A white check mark in a green circle indicates the
anomaly is enabled. A white X in a grey circle indicates the anomaly is
disabled.
Logging The logging status for each anomaly. A white check mark in a green circle
indicates logging is enabled for the anomaly. A white X in a grey circle
indicates logging is disabled for the anomaly.
Action The action set for each anomaly. Action can be Pass, Drop, Reset, Reset
Client, Reset Server, Drop Session, Clear Session, or Pass Session.
Modify The Edit and Reset icons. If you have changed the settings for an anomaly,
you can use the Reset icon to change the settings back to the
recommended settings.
Each anomaly is preset with a recommended configuration. By default all anomaly
signatures are enabled. You can use the recommended configurations or you can
modify the recommended configurations to meet the needs of your network.
For more information on minimum, maximum, and recommended thresholds for the
anomalies with configurable thresholds, see the FortiGate IPS Anomaly Thresholds
and Dissector Values Technical Bulletin.
01-28011-0254-20051115
"IPS CLI configuration" on page
Anomaly
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