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.
Article Id 193601


This article provides steps to enable the usage of multiple VDOMs.




FortiGate, FortiProxy v7.2+.


The following commands are used to enable multiple VDOMs in different FortiOS versions.

In version 5.6 and 6.0.


config sys global
    set vdom-admin enable


In versions 6.2, 6.4 and 7.0 FortiOS, there are two VDOM modes.

'split-vdom': split-task VDOM mode simplifies deployments that require only one management VDOM and one traffic VDOM.
The management VDOM is used to manage the FortiGate, and cannot be used to process traffic.

The traffic VDOM provides separate security policies and is used to process all network traffic.

'multi-vdom': multiple, completely separate VDOMs are created.
Any VDOM can be the management VDOM, as long as it has internet access.

There are no 'inter-VDOM' links, and each VDOM is independently managed.

To enable 'multiple vdom's:


config sys global
    set vdom-mode multi-vdom   


To enable 'split-vdom':


config sys global
    set vdom-mode split-vdom


Additional to the above, starting from version 6.4 onwards, it is also possible to enable the following to prevent accidentally creating VDOMs in the CLI:


config system global
    set edit-vdom-prompt enable


This setting is disabled by default. Once enabled, when an administrator creates a new VDOM, the FortiGate displays a prompt to confirm before the VDOM is created.


config vdom
    edit vdomtest1
The input VDOM name doesn't exist.
Do you want to create a new VDOM?
Press 'y' to continue, or press 'n' to cancel. (y/n)y



To revert to single vdom scenario:

  • Make sure there are no interfaces assigned to any of the VDOMs (except the root VDOM)
  • Run the following command:


config system global

set vdom-mode no-vdom



FortiProxy versions below 7.0 do not support multi-VDOM configuration in any version. To enable multi-VDOM configuration in version 7.2.x and above, run the following command:


config system global

set vdom-mode multi-vdom




Additional notes: 

The above command used to enable multi-vdom on VM instances must be written manually from start to finish or copied and pasted into the CLI.

This command will not be auto-filled by using the tab button and it does not show if checked using '?' after 'set'. 

This command also does not show if 'show full' is used.


When entering 'set vdom-mode ?', it will be possible to see the options of the multi-vdom mode. 


Example for reference:


set vdom-mode ?
no-vdom Disable multiple VDOMs mode.
multi-vdom Enable multiple VDOMs mode.


In some cases, this option will not be available for VMs, because of the license required.

For more information regarding this behavior on VM instances, please follow the article below:

Technical Tip: Default behaviour of the FG-VMxxV and FG-VMxxS series with multi-VDOM


Related documents:

Virtual Domains - FortiGate cookbook

VDOM configuration - FortiGate administration guide.