Place the JAR file for the filter, security constraint, or other feature in the domain-dir/lib directory.
Edit the domain-dir/config/default-web.xml file to refer to the JAR file.
Restart the server.
The InvokerServlet allows use of the servlet-name instead of the servlet-mapping for invoking a servlet with a URL, as described in Invoking a Servlet with a URL. The InvokerServlet is commented out in the default-web.xml file. To re-enable the InvokerServlet, remove the comment indicators (<!-- and -->), then restart the server.