i have sitecom also...
go to
in your browser
then you get a page named ' setup' if all goes right...
if it doenst load, make sure that is your router LAN ip, it is that for me and most people i think.
when you are there, go to advanced.
then go to Access Control.
there you can add/delete open ports
at least it works for me like this, i hope this helps you