Remote authentication servers

If you already have LDAP or RADIUS servers configured on your network, FortiAuthenticator can connect to them for remote authentication, much like FortiOS remote authentication.

LDAP

If you have existing LDAP servers, you may choose to continue using them with FortiAuthenticator by configuring them as remote LDAP servers.

When entering the remote LDAP server information, if any information is missing or in the wrong format, error messages will highlight the problem for you.

FortiAuthenticator supports multiple Windows AD server forests, with a maximum of 20 Remote LDAP servers with Windows AD enabled.

To view all information about your multiple servers, go to Monitor > Authentication > Windows AD.

To add a remote LDAP server entry:

Go to Authentication > Remote Auth. Servers > LDAP and select Create New. The Create New LDAP Server window opens.

Enter the following information.

Name	Enter the name for the remote LDAP server on FortiAuthenticator.
Primary server name/IP	Enter the IP address or FQDN for this remote server.
Port	Enter the port number.
Use secondary server	Select to use a secondary server. The secondary server name/IP and port must be entered.
Secondary server name/IP	Enter the IP address or FQDN for the secondary remote server. This option is only available when Use secondary server is selected.
Secondary port	Enter the port number for the secondary server. This option is only available when Use secondary server is selected.
Base distinguished name	Enter the base distinguished name for the server using the correct X.500 or LDAP format. The maximum length of the DN is 512 characters. You can also select the browse button to view and select the DN on the LDAP server.
Bind Type	The Bind Type determines how the authentication information is sent to the server. Select the bind type required by the remote LDAP server. Simple: bind using the user’s password which is sent to the server in plaintext without a search. Regular: bind using the user’s DN and password and then search. If the user records fall under one directory, you can use Simple bind type. But Regular is required to allow a search for a user across multiple domains.
Add supported domain names (used only if this is not a Windows Active Directory server)	Select to enter multiple domain names for remote LDAP server configurations. The FortiAuthenticator can then identify the domain that users on the LDAP server belong to.

If you want to want to import a specific LDAP system's template, under Query Elements, enter the following:

Pre-defined templates	Select a pre-defined template from the dropdown menu: Microsoft Active Directory, OpenLDAP, or Novell eDirectory.
User object class	The type of object class to search for a user name search. The default is person.
Username attribute	The LDAP attribute that contains the user name. The default is sAMAccountName.
Group object class	The type of object class to search for a group name search. The default is group.
Obtain group memberships from	The LDAP attribute (either user or group) used to obtain group membership. The default is User attribute.
Group membership attribute	Used as the attribute to search for membership of users or groups in other groups.
Check this if non-admin users are not allowed to search their own attributes even after successful binding	This feature has been implemented to enhance Oracle-based ODSEE LDAP support.

If you want to have a secure connection between the FortiAuthenticator unit and the remote LDAP server, under Secure Connection, select Enable, then enter the following:

Protocol	Select LDAPS or STARTLS as the LDAP server requires.
CA Certificate	Select the CA certificate that verifies the server certificate from the dropdown menu.

If you want to authenticate users using MSCHAP2 PEAP in an Active Directory environment, enable Windows Active Directory Domain Authentication, then enter the required Windows AD Domain Controller information.

Kerberos realm name	Enter the domain’s DNS name in uppercase letters.
Domain NetBIOS name	Enter the domain’s DNS prefix in uppercase letters.
FortiAuthentication NetBIOS name	Enter the NetBIOS name that will identify the FortiAuthenticator unit as a domain member.
Administrator username	Enter the name of the user account that will be used to associate the FortiAuthenticator unit with the domain. This user must have at least Domain User privileges.
Administrator password	Enter the administrator account’s password.

When you are finished here, go to Authentication > RADIUS Service > Clients to choose whether authentication is available for all Windows AD users or only for Windows AD users who belong to particular user groups that you select. See RADIUS service for more information.

If you want to import remote LDAP users, select to either Import users or Import users by group memberships under Remote LDAP Users. Once a method is chosen, select Go. This will open a separate window where you may specify the LDAP server, apply filters, and attributes. Select Configure user attributes to apply/edit the following LDAP user mapping attributes:

Username	Enter the remote LDAP user's name. Newly introduced in FortiAuthenticator 4.3.
First name	Enter the attribute that specifies the user's first name. Set to givenName by default.
Last name	Enter the attribute that specifies the user's last name. Set to sn by default.
Email	Enter the attribute that specifies the user's email address. Set to mail by default.
Phone	Enter the attribute that specifies the user's number. Set to telephoneNumber by default.
Mobile number	Enter the attribute that specifies the user's mobile number. Set to mobile by default.
FTK-200 serial number	Enter the remote LDAP user's FortiToken serial number.
Certificate binding common name	Enter the remote LDAP user's certificate-binding CN. When this field is populated, the Certificate binding CA must also be specified. Newly introduced in FortiAuthenticator 4.3.
Certificate binding CA	Local or trusted CAs to apply for the remote LDAP user. Must be specified if the Certificate binding common name is populated. Newly introduced in FortiAuthenticator 4.3.

Select OK to apply your changes.

You can now add remote LDAP users, as described in Remote users.

Remote LDAP password change

Windows AD users can conveniently change their passwords without provision changes being made to the network by a Windows AD system administrator. There are three ways FortiAuthenticator supports a password change: RADIUS Login, GUI User Login, and GUI User Portal.

RADIUS Login

For the method to work, all of the following conditions must be met:

FortiAuthenticator has joined the Windows AD domain
RADIUS client has been configured to "Use Windows AD domain authentication"
RADIUS authentication request uses MS-CHAPv2
RADIUS client must also support MS-CHAPv2 password change

A "change password" response will be produced that FortiAuthenticator will recognize, which will allow cooperation between the NAS and the Windows AD server that will result in a password change.

GUI User Login

For this method to work, one of the following conditions must be met:

FortiAuthenticator has joined the Windows AD domain
Secure LDAP is enabled and the LDAP admin (i.e. regular bind) has the permissions to reset user passwords

You must log in via the GUI portal. FortiAuthenticator will validate the user password against a Windows AD server. The Windows AD server will return with a "change password" response. If that happens, the user will be prompted to enter a new password.

GUI User Portal

For this method to work, one of the following conditions must be met:

FortiAuthenticator has joined the Windows AD domain
Secure LDAP is enabled

Once successfully logged into the GUI, the user has access to the user portal. If desired, the user can change their password in the user portal.

RADIUS

If you have existing RADIUS servers, you may choose to continue using them with FortiAuthenticator by configuring them as remote RADIUS servers.This feature can also be used to migrate away from third party two-factor authentication platforms.

When entering the remote RADIUS server information, if any information is missing or in the wrong format, error messages will highlight the problem for you.

To add a remote RADIUS server entry:

Go to Authentication > Remote Auth. Servers > RADIUS and select Create New. The Create New RADIUS Server window opens.
Enter the following information, then select OK to add the RADIUS server.

Name	Enter the name for the remote RADIUS server on FortiAuthenticator.
Primary Server	Enter the server name or IP address, port and secret in their requisite locations to configure the primary server.
Secondary Server	Optionally, add redundancy by configuring a secondary server.
User Migration	Select Enable learning mode to record and learn users that authenticate against this RADIUS server. This option should be enabled if you need to migrate users from the server to the FortiAuthenticator. Select View Learned Users to view the list of learned users. See Learned RADIUS users.