Is there any way to set up my router to allow me to broadcast a shoutcast stream I can access outside my LAN?

At the moment, I have it all set up so I can access it fine within my LAN on 192.168.0.2:8000
the only problem at present is that nobody can access it outside ym LAN, they are just asked to login to the router

any ideas appreciated
Cheers,
Mitchel