jBoss is a 3rd generation container. We believe J2EE servers are going to live in various environments. Some live in standalone mode, i.e. most of the industry "app server" field today, some servers live in embedded configurations in tools and applications where a given product includes a J2EE container, still others will flourish in the ASP/ISP arena. jBoss with it's modular architecture based on JMX is the first and leading container that adresses these variety of needs. This session will present the configuration of a J2EE server through JMX at startup time. We will show the "spine", the bare jmx server, and the mechanisms that load the different modules and plugins and their configurations that make up the different server in standalone and embedded modes. We will also show how to extend the server with custom classes and have them integrate in the J2EE server classes. We will show the usage of the management interfaces to deploy and administer farms of jBoss servers through JMX and Jini for ISP/ASP usage.