System status | Changing the FortiGate firmware |
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Note: Installing firmware replaces your current antivirus and attack definitions with the definitions included with the firmware release that you are installing. When you have installed new firmware, use the procedure “Manually updating antivirus and attack definitions” on page 119 to make sure that antivirus and attack definitions are
1Copy the firmware image file to your management computer.
2Login to the FortiGate
3Go to System > Status.
4Select Firmware Upgrade 
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5Enter the path and filename of the previous firmware image file, or select Browse and locate the file.
6Select OK.
The FortiGate unit uploads the firmware image file, reverts to the old firmware version, resets the configuration, restarts, and displays the FortiGate login. This process takes a few minutes.
7Login to the
For information about logging into the
8Go to System > Status and check the Firmware Version to confirm that the firmware has been installed successfully.
9Restore your configuration.
See “Restoring system settings” on page 108 to restore your previous configuration.
10Use the procedure “Manually updating antivirus and attack definitions” on page 119 to update antivirus and attack definitions.
Reverting to a previous firmware version using the CLI
This procedure reverts your FortiGate unit to its factory default configuration and deletes NIDS
Before running this procedure you can:
•Backup the FortiGate unit configuration using the command execute backup config.
•Backup the NIDS user defined signatures using the command execute backup nidsuserdefsig
•Backup web content and email filtering lists, see the FortiGate Content Protection Guide.
If you are reverting to a previous FortiOS version (for example, reverting from FortiOS v2.50 to FortiOS v2.36) you may not be able to restore your previous configuration from the backup configuration file.
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