Larsen, Thanks a lot for the link.
It clearly explains how to enable security for jmx and web consoles, though I had intended to disable security altogether.
Instead I have enabled and I am able to login and view JMX and WEB consoles.
one clarification needed. In the link it is given that by default security is disabled. It doesn't appear like that with - jboss-eap-4.3
But my issue is resolved. Thanks a lot for the help