Thank you for your reply.
I did read that article but I wasn't sure it applied to me because I cannot see any reference to port 4851 in there. I'm having difficulty noticing any "ranges" in there either.
If I was able to identify what this port is even used for then perhaps I can identify why portal is trying to connect to it, but it seems to be in the "unassigned" range from what I see online.
Just to add, I did a grep of all xml files for '4851' under the JBOSS_HOME and it found nada.
It's probably a remoting port. For remoting, I think that each connection is assigned its own random port. Based on this post: http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4059715 it would appear that there is no mechanism to restrict the port range used by remoting, but you could always ask again in the remoting forum.