Portal Services

The SSO portal supports a logon widget that you can embed in any web page. Typically, an organization would embed the widget on its home page.

The SSO portal sets a cookie on the user’s browser. When the user browses to a page containing the login widget, the FortiAuthenticator unit recognizes the user and updates its database if the user’s IP address has changed. The user will not need to re-authenticate until the login timeout expires, which can be up to 30 days. To log out of FSSO immediately, the user can select the Logout button in the widget.

The SSO portal supports multiple authentication methods including manual authentication, embeddable widgets, and Kerberos authentication.

To configure portal services, go to Fortinet SSO Methods > SSO > Portal Services.

The following settings can be configured:

User Portal		Select Enable SSO login portal to enable the SSO login portal.
	Username input format	Select one of the following three username input formats: username@realm realm\username realm/username.
	Realms	Add realms to which the client will be associated. See Realms on page 1. Select a realm from the dropdown menu in the Realm column. Select whether or not to allow local users to override remote users for the selected realm. Select whether or not to use Windows AD domain authentication. Edit the group filter as needed. That is, filter users based on the groups they are in. If necessary, add more realms to the list. Select the realm that will be the default realm for this client.
	Login timeout	Set the maximum number of days a user is allowed to stay logged in before being logged out automatically from SSO, from 1 to 30 days. Default of 7 days.
	Delay when redirecting to an external URL	Set the delay that occurs when redirecting to an external URL, from 1 to 10 seconds, with a default of 7 seconds.
	Embeddable login widget	Use this code to embed the login widget onto your site. The code cannot be edited manually in this field.
	Login widget demo	A demo of what the login widget will look like on your site.
Kerberos User Portal		Select Enable Kerberos login for SSO to enable kerberos log in for SSO. See Kerberos for more information.
	Import Keytab	Select to open the Import Keytab window where you can import a keytab from your computer. A keytab must be imported for Kerberos log in for SSO to be enabled.
	Kerberos Principal	Enter the Kerberos principal.
SSO Web Service		Select Enable SSO Web Service to use the web service to log users in and out.
	SSO user type	Specify the type of user that the client will provide: external, local, or remote (LDAP server must be selected from the dropdown menu).

Kerberos

Kerberos authentication allows the FortiAuthenticator to identify connecting users through a Kerberos exchange after a redirect from a FortiGate device.

A keytab file that describes your Kerberos infrastructure is required. To generate this file, you can use a ktpass utility. The following code can be used in a batch file to simplify the keytab file creation:

set OUTFILE=FortiAuthenticator.keytab

set USERNAME=FortiAuthenticator@corp.example.com

set PRINC=HTTP/FortiAuthenticator.corp.example.com@CORP.EXAMPLE.COM

set CRYPTO=all

set PASSWD=Pa$$p0rt

set PTYPE=KRB5_NT_PRINCIPAL

ktpass -out %OUTFILE% -pass %PASSWD% -mapuser %USERNAME% -princ %PRINC% -crypto %CRYPTO% -ptype %PTYPE%

The FortiGate device can be configured to redirect unauthenticated users to the FortiAuthenticator, however the Kerberos authentication URL is different than the standard login URL. The Custom Message HTML for the Login Page HTML Redirect for Kerberos is as follows:

<!DOCTYPE HTML>

<head>

window.location.href = http://<FortiAuthenticator-fqdn>/login/kerb-auth?user_continue_url=%%PROTURI%%

</script>

<title>

Page Redirection

</title>

</head>

<body>

If you are not redirected automatically, click on the link

<a href='http://<FortiAuthenticator-fqdn>/login/kerb-auth?user_continue_url=%%PROTURI%%'>

http://<FortiAuthenticator-fqdn>/login/kerb-auth?user_continue_url= %%PROTURI%%

</a>

</body>

</html>