In WPS, Authentication filters are used to show custom portal pages after logging through login Portlet.
One possible use case could be like this,
If user Dave login to portal, he should see Finance portal page
If user Andrew login to Portal, he should see Sports portal page
Other use case that i worked with is,
User login using Login Portlet (My own developed Login Portlet) and after
authentication user will be redirected to custom screens of login portlet itself
and after providing certain information on custom screens, he will be logged in to portal.
For all these kind of use cases, You need to write your own login portlet and implement Authentication Filters
I am just gathering all the technotes that i came across while working with Authentication Filters
Setting service configuration properties, in this case it would be WP Authentication Service
This New security APIs in WebSphere helped me lot to understand following, hope it will help for all reader as well.
a) LoginPortletService and various filters
b) Capabilities of the remember me cookie
c) Remember me cookie portlet service
c) Using the Puma Service in a public context and
d) Authentication filters
Portal and other libraries required for writing a Portal Authentication Filter
You will also need, IBM's Advanced URL Genenration Helper Classes
if you find any error at portal startup, after creating Custom Properties in WP Authentication Service on WAS,