do you have a router , if you do you have to open choosen port and point that to the computer that hfs is running on.
www.portforward.comfind your router and follow the guide.
now open google and type : my ip , press enter
google will now tell you your ip.
tell that to your frend and ask him to try.
dont forget to put http:// before the ip and port after (if you choosen port 80 you dont have to do that.)
so if you choose port 8080 if shud look like this :
http://123.123.123.123:8080123.123.123.123 is just an example ip.
if you choosen port 80 just type like this :
http://123.123.123.123all web pages you visit on the net use port 80 as standard.
most people have a dynamic ip (it changes every time you connect to internet)
as Rejetto says , if you do use a no-ip or dyndns adress.
an updater for that is in the hfs itself.