apache reverse proxy and single sign on

We are using apache reverse proxy to handle single sign on and access
control.
Is there any module which does the single sign on.
apache reverse proxy (using single sign on) should be able to send the
authentication info to the application running on weblogic.
so that it can be reautheticated against weblogic.
But it should not prompt any login page.


For example :

There is a login page for the application.
Apache reverse proxy handles this login authentication.
Once the user is logged in, It shows the web page with links for the
other web applications.
When you click the link for the web application, it should not take
you to the login page for that web application.
Behind the scenes, apache should send the authentication info
(userid,password etc.) to weblogic server without prompting the login
page.

Please advise.