Chapter 10 Install and System Administration for FortiOS 5.0 : FortiGuard : Antivirus and IPS : Automatic updates
  
Automatic updates
The FortiGate unit can be configured to request updates from the FortiGuard Distribution Network. You can configure this to be on a scheduled basis, or with push notifications.
See Also
• Scheduling updates
• Push updates
• Push IP override
• Manual updates
• FortiGuard Services
• Antivirus and IPS
• Web filtering
• Email filtering
• Security tools
• Troubleshooting