Thanks guys ... now it's working

Yes ... my computer is on a LAN with a firewall.
I have made a port forwarding in the firewall to port 8112 on my computer but still I get 'unable to connect ...'
Any ideas ?

I have followed the guidelines for WebUI ... enabled plugin and chose a password.
When I type http://localhost:8112/ in Firefox (Ubuntu) I get:

Unable to connect
Firefox can't establish a connection to the server at localhost:8112.

What's wrong