Peter, this is my hosts-file. It is identical with yours: 127.0.0.1 localhost There are seven spaces between 127.0.0.1 and localhost. You wrote: "IF you did not change the ports used by JBoss AS AND you did not use the -b option to bind JBoss AS to a different IP address." How can I check these options? When I make a double-click on "JBoss 4.2. Server" within the "JBoss Server View", I can see the server ports in the Overview: JNDI Port, Automatically detect When I click on "Configure..." there is the "Current Value" of 1099. Web Port, Automatically detect When I click on "Configure..." there is the "Current Value" of 8080. That should be fine. This is a snipped from my JBoss run.bat from the bin-directory: | :RESTART | "%JAVA%" %JAVA_OPTS% ^ | -Djava.endorsed.dirs="%JBOSS_ENDORSED_DIRS%" ^ | -classpath "%JBOSS_CLASSPATH%" ^ | org.jboss.Main %* | I do now know whether Eclipse uses the same run.bat or if Eclipse has it's own JBoss-start-routine with separate options. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4252657#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...