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IPS Predefined
FortiGate-100A Administration Guide 01-28007-0068-20041203 279
Predefined signature list
You can enable or disable groups of predefined signatures and configure the settings
for individual predefined signatures from the predefined signature list.
Figure 142:A portion of the predefined signature list
Table 24 describes each possible action you can select for predefined signatures.
Group Name The signature group names.
Enable The status of the signature group. A white check mark in a green circle
indicates the signature group is enabled. A white X in a grey circle indicates
the signature group is disabled.
Logging The logging status for individual signatures. Click on the blue triangle to
show the signature group members. A white check mark in a green circle
indicates logging is enabled for the signature. A white X in a grey circle
indicates logging is disabled for the signature.
Action The action set for individual signatures. Click on the blue triangle to show
the signature group members. Action can be Pass, Drop, Reset, Reset
Client, Reset Server, Drop Session, Clear Session, or Pass Session. See
Table 24.
Revision The revision number for individual signatures. To show the signature group
members, click on the blue triangle.
Modify The Configure and Reset icons. Reset only appears when the default
settings have been modified. Selecting Reset restores the default settings.
Table 24: Actions to select for each predefined signature
Action Description
Pass The FortiGate unit lets the packet that triggered the signature pass
through the firewall. If logging is disabled and action is set to Pass, the
signature is effectively disabled.
Drop The FortiGate unit drops the packet that triggered the signature. Fortinet
recommends using an action other than Drop for TCP connection based
attacks.
Reset The FortiGate unit drops the packet that triggered the signature, sends a
reset to both the client and the server, and removes the session from the
FortiGate session table. Used for TCP connections only. If you set this
action for non-TCP connection based attacks, the action will behave as
Clear Session. If the Reset action is triggered before the TCP connection
is fully established it acts as Clear Session.