Sun Java System Application Server Platform Edition 8.2 Developer's Guide

User Authentication for Single Sign-on

The single sign-on feature of the Application Server allows multiple web applications deployed to the same virtual server to share the user authentication state. With single sign-on enabled, users who log in to one web application become implicitly logged into other web applications on the same virtual server that require the same authentication information. Otherwise, users would have to log in separately to each web application whose protected resources they tried to access.

An example application using the single sign-on scenario could be a consolidated airline booking service that searches all airlines and provides links to different airline web sites. Once the user signs on to the consolidated booking service, the user information can be used by each individual airline site without requiring another sign-on.

Single sign-on operates according to the following rules:

The single sign-on feature utilizes HTTP cookies to transmit a token that associates each request with the saved user identity, so it can only be used in client environments that support cookies.

To configure single sign-on, set the following properties in the virtual-server element of the domain.xml file:

Here is an example configuration with all default values:

<virtual-server id="server" ... >
    <property name="sso-enabled" value="true"/>
     <property name="sso-max-inactive-seconds" value="450"/>
     <property name="sso-reap-interval-seconds" value="80"/>