How do i make a web server with Node.js?

I want to make my own web server, using Node.js. I have tried a lot of things and all of them only half successfull. I can see the needed output in my browser, but everyone else can't access those files...
What do i need for starters? A simple file index.html, stored on my computer, that can be accessible to everyone thro web.
What have i tried?
1) http-server command. It says: Available on http://ift.tt/1uXLjtv. Works for me, cant be accessed for others.
2) npm express. Results are the same.
3) Writing a couple of js files that are creating http server and giving an html page. Results are the same. ;0 Also i got a router, should i deactivate it's firewall too?