Fortinet FortiGate 4000 - Manual (Page 127)

Virus and attack definitions updates and registration Scheduling updates
FortiGate-4000 Installation and Configuration Guide
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4 Select Apply.
The FortiGate unit starts the next scheduled update according to the new update
schedule.
Whenever the FortiGate unit runs a scheduled update, the event is recorded in the
FortiGate event log.
Figure 36: Configuring automatic antivirus and attack definitions updates
Adding an override server
If you cannot connect to the FDN, or if your organization provides antivirus and attack
updates using their own FortiResponse server, you can use the following procedure to
add the IP address of an override FortiResponse server.
To add an override server
1 Go to System > Update.
2 Select the Use override server address check box.
3 Type the IP address of a FortiResponse server.
4 Select Apply.
The FortiGate unit tests the connection to the override server.
If the FortiResponse Distribution Network setting changes to available, the FortiGate
unit has successfully connected to the override server.
If the FortiResponse Distribution Network stays set to not available, the FortiGate unit
cannot connect to the override server. Check the FortiGate configuration and network
configuration for settings that would prevent the FortiGate unit connecting to the
override FortiResponse server.