To enable Gateway Anti-Virus settings for one or more Objects per zone
Under Object, navigate to Match Object > Zones.
Select the Zone for which Gateway Anti-Virus has to be enabled and click on edit
button. Switch on the Enable Gateway Anti-Virus Service toggle button.
Click Save.
To enable Gateway Anti-Virus options
Click Accept.
To view or enable/disable Gateway Anti-Virus Signatures
Select the Signatures tab.