Reuse the old session ID in WAS 6.1.x

Navigate to following:

Application servers > WebSphere_Portal > Process Definition > Java Virtual Machine > Custom Properties

Add a "New" custom property

Name: HttpSessionIdReuse
Value: true
Description: It instructs JVM to reuse the session ID when user session changes from unauthenticated to authenticated.

Enable anonymous session in WAS 6.1.x

Navigate to following:

Resource environment providers > WP NavigatorService > Custom properties

Add a "New" custom property:

Name: public.session
Value: true
Description: This property is used to enable anonymous user session.