Workbench is a client Java app that needs to be configured to talk via soap to servername:portnumber.
Workspace is a web app that woudl be connected on the following URL:
http://servername:portnumber/workspace
Adminui is a web app that needs a browser to connect to the URL:
http://servername:portnumber/adminui
If you are using the JBoss turnkey install then the port will be 8080.