For IDP initiated SSO click this link
For SP initiated SSO either browse to http://demo.forgerock.com:8080/wordpress/ and click the login link, or click this link
To understand what is happening behind the scenes, take a look at
$HOME/.ForgeRock/OpenIG/config.json. The HandlerServlet
is no longer the entry point to OpenIG processing. If you look for the
servletObject at the end of the file you see the HandlerServlet has been
replaced by the DispatchServlet. The DispatchServlet provides an internal
routing mechanism based on the incoming URI. The DispatchServlet looks at
the incoming URI and dispatches to the FederationServlet when the SAML URI
is found, otherwise it dispatches to the HandlerServlet as in the previous
sample. This allows the FederationServlet to process the incoming assertion,
set the attributes from the assertion in the HTTPSession, which then allows
the normal chain of filter processing, through the HandlerServlet, to pick up
the credentials and log the user into the target application.

