You can specify a default virtual server for an individual listen socket and for the server instance. If a given listen socket does not have a default virtual server, the server instance’s default virtual server is used.
You can specify a default virtual server for a listen socket by:
Setting or changing the default virtual server information using the Edit Listen Sockets page on the Preferences tab of the Server Manger.
Editing the defaultvs attribute of the CONNECTIONGROUP element in the server.xml file. For more information about server.xml, see the Sun Java System Web Server 6.1 SP9 Administrator’s Configuration File Reference.