Navigate to the Outbreak Prevention screen.
This page automatically refreshes to make sure the top threat and status information is current.
On the working area under Service Status, click Update Now to download the latest Outbreak Prevention Policies (this is optional if you have already enabled Scheduled Update and are using the latest Outbreak Prevention Policies).
Click OK twice after downloading the Outbreak Prevention Policies.
Under Top Threats Around the World, click the name of the virus that currently presents a threat to your network. By default, Control Manager lists newest threat first, and the remaining threats in alphabetic order. Each Outbreak Prevention Policy is designed to counter a specific threat.
Click Start Outbreak Prevention Mode.
Under Outbreak Prevention Policy, in the Policy in effect for list, choose the number of days that Control Manager continues in Outbreak Prevention Mode.
From the Deployment plan list, choose a plan to deploy the Outbreak Prevention Policies to the managed products.
Under Outbreak Prevention Policy Details, select the Do not block permitted port numbers specified in the Outbreak Prevention settings check box to ensure ports defined as exceptions are not blocked.
Configure managed product settings or click Recommended Settings.
Click Activate.
Click OK. Outbreak Prevention Mode has started and the 
icon appears on the management console header.