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FortiGate-50A/50B, FortiWiFi-50B and FortiGate-100 FortiOS 3.0 MR4 Install Guide
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Reverting to a previous firmware version FortiGate Firmware
6 Select 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.
7 Log into the web-based manager.
8 Go to System > Status and check the Firmware Version to confirm that the
firmware is successfully installed.
9 Restore your configuration.
For information about restoring your configuration, see the FortiGate
Administration Guide.
10 Update antivirus and attack definitions.
For information about antivirus and attack definitions, see the FortiGate
Administration Guide.
Reverting to a previous firmware version using the CLI
This procedure reverts the FortiGate unit to its factory default configuration and
deletes IPS custom signatures, web content lists, email filtering lists, and changes
to replacement messages.
Before beginning this procedure you can:
• back up the FortiGate unit system configuration using the command execute
backup config
• back up the IPS custom signatures using the command execute backup
ipsuserdefsig
• back up web content and email filtering lists
For information, see the FortiGate Administration Guide.
If you are reverting to a previous FortiOS version (for example, reverting from
FortiOS v3.0 to FortiOS v2.80), you might not be able to restore your previous
configuration from the backup configuration file.
To use the following procedure, you must have a TFTP server the FortiGate unit
can connect to.
To revert to a previous firmware version using the CLI
1 Make sure the TFTP server is running.
2 Copy the firmware image file to the root directory of the TFTP server.
3 Log into the FortiGate CLI.
Note: Installing firmware replaces the current antivirus and attack definitions, along with the
definitions included with the firmware release you are installing. After you install new
firmware, use the procedure o make sure that antivirus and attack definitions are up to date.
For details, see the FortiGate Administration Guide. You can also use the CLI command
execute update-now to update the antivirus and attack definitions.
Note: To use this procedure, you must log in using the admin administrator account, or an
administrator account that has system configuration read and write privileges.