Created on 08-20-2019 05:50 AM Edited on 04-07-2022 12:31 PM By Anonymous
Description
This article explains how to downgrade / rollback the AV definitions, IPS definitions or IPS engine on a FortiGate unit
By it’s default configuration, FortiOS will not accept the upload to a FortiGate unit of an AV or IPS definition/engine that is older than the one which is currently installed on the unit.
The error message "Firewall has all the updates found in the given file" will be reported.
Solution
The downgrade procedure is as follows:
1) From the FortiGate CLI, launch the command:
# diagnose autoupdate downgrade enable
2) From the FortiGate GUI:
Import the AV or IPS definition/engine needed.
3) From the FortiGate CLI, launch the command:
# diagnose autoupdate downgrade disable
4) Verify if the downgrade process is fine from CLI:
# diagnose autoupdate versions
5) If necessary, disable scheduled updates from FortiGuard Distribution Network to keep imported signatures/prevent automatic updates:
# config system autoupdate schedule
# set status disable
# end
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