Technical Note: FortiGate cannot be managed after restoring FortiManager database

[psalian]

Description

After restoring the FortiManager database, it is observed that:

1) The status of FortiGates in the FortiManager Web Manager show as "not connected".
2) No additional devices can be added to the FortiManager.

Reference
FortiManager CLI reference guide version 4.0
Scope

Firmware v4.x, v5.x

Workaround

In order to restore communications between the FortiManager and the FortiGate, switch the offline_mode parameter from enable to disable.

Firmware v5.x

CLI:

config system admin setting
set offline_mode disable
end

GUI:

System Settings >> Advanced Settings

Firmware v4.x

CLI:

config fmsystem admin setting
set offline_mode disable
end

GUI:

System Settings >> Advanced >> Advanced Settings

Problem Verification

To find out whether offline_mode is currently set to enabled (which is the cause of the problem), run the following command:

    config fmsystem admin setting
    show

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