FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
jclar
Staff
Staff
Article Id 254713
Description

This article describes how to unregister fortiManager from FortiGate.

Scope FortiGate.
Solution

Scenario:

The client’s HA environment is out-of-sync due to ‘system central-management’.

Checking on the primary firewall, the serial number is not attached anymore.

However, the secondary shows otherwise. Below is a replicated scenario of the client’s case.

The secondary Firewall has the serial number configured but the FortiManager IP is no longer defined.

 
 

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Unset the type on central-management, but error -582 occurs:

 

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Error:

fortimanager gui error.PNG

 

end

Please unregister-device from FortiManager first.

object set operator error, -582 discard the setting

Command fail. Return code -582

 

Solution:

 

Execute the command below to unregister the FortiManager on the device:

 

execute central-mgmt unregister-device <SN>

 

Image3.png

 

Once this has been set, the type is automatically changed to ‘none’.

 

Image4.png

 

Note: In older versions, it is necessary to manually set the type to none as seen below.

 

Image5.png

Image6.png

 

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