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, FortiAuthenticator 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 on login portal to enable the SSO login portal. | |
| Realms |
Add realms to which the client will be associated. See RADIUS service.
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| Login timeout | Set the maximum number of minutes a user is allowed to stay logged in before they are automatically logged out from SSO, between 1-10080 (maximum of one week, set by default). | |
| Maximum delay when redirecting to an external URL | Set the delay in seconds that occurs when redirecting to an external URL, between 1-10 seconds, with a default of 7 seconds. | |
| Embeddable login widget | Use this code to embed the login widget onto your site. The code in the field cannot be manually edited. | |
| 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 and enable |
Select to open the Import Keytab window where you can import a keytab from your computer. A keytab must be imported to enable Kerberos log in for SSO. |
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| Kerberos Principal | View the Kerberos principal. | |
| SAML Portal | Select Enable SAML portal to enable SAML Portal log in for SSO. | |
| 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>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta http-equiv="refresh" content="1;url=http://<FortiAuthenticator-fqdn>/login/kerb-auth?user_continue_url=%%PROTURI%%">
<script type="text/javascript">
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>