To add a DoS policy
Navigate to POLICY | Rules and Policies > DoS Policy.
Click +Add in the lower left corner. The Adding Rule dialog displays.
In the Name field, enter a friendly, meaningful name for the new DoS policy.
From the Source drop-down menu, choose a source gateway or address.
From the Destination drop-down menu, choose a destination gateway or address.
From the Schedule drop-down menu, choose when the policy is in effect. The default is Always.
Click Enable to activate your new policy.