When you dockerize your jboss, the expose directive (luckily) doesn’t open firewall ports.

On Fedora20 you need to update your firewalld configuration:

 1- add one or more services to /etc/firewalld/zones/public.xml

 2- define ports in   /etc/firewalld/services/eap6-standalone.xml

<service>
  <short>eap-standalone</short>
  <port port="8080" protocol="tcp" />
  ...
</service>

Now 
  # restorecon -R /etc/firewalld/

Then 
  #firewall-cmd --reload