Hi
I have to little information to be able to help you so much. I assume that you have got the system working locally on your LAN before trying over the Internet.
When connecting to n6cm.shacknet,nu you get the answer from the routers webinterface at port 80. You must either change the web server port on the router (suggest 8080 which is normal) then you can leave it at 80 in the RRC, or you have to change it in the RRC to something else tex 8000.
When connecting to a webserver using an other port than the default you add the portnumber after the webadress eg.
http://n6cm.shacknet.nu:808073 de mike