Why doesnt my tekkit server work when friends try and connect?

[r1dogz]

So i set up a tekkit server on my laptop then i was able to connect via my other computer via the same way my friends would. But when my friends try to connect to the server they get timed out, but they can connect to other tekkit servers. So does anyone know whats wrong with my server set up?

[Chocopotato]

I'm not too sure about this but try turning your firewall off and then see if your friends can connect.