[Icecast] icecast internet access

[Steve Sykes]

I have ices/icecast running and can listen on my home network. I am 
using port 8020 because my isp blocks 80, and 8080 is being used.  I 
have a dyndns address and webhop.  My problem is that I can't seem to 
get the audio page and stream outside of my home network.  My router and 
firewall are open correctly as far as I can tell.
Is there an easy guide to set up the webpage for outside access?  Is 
there a way to test internally to see if the outside world is seeing it?

Regards,
Steve Sykes