Server Client internet connection

have you port forwarded your router to allow for incoming connections? this is usually the case when your not able to receive connections outside your router? you may also need to change the NAT settings depending upon the Router you use for internet connection you do all this via your router website page usually 192.168.0.1 or 10.0.0.1 if its neither open Command prompt(start menu > search "cmd") type ipconfig and hit enter whatever ip you have as Default Gateway will take you to your router setup.

Thank you:D

Sorry but i am very new to this: how do i know which ports to use for port forward??

Thats totally your decision and example could be 4455 but really you can choose any combination of numbers, however if you are using windows you will also need to open these ports within windows http://windows.microsoft.com/en-au/windows/open-port-windows-firewall#1TC=windows-7

Thank you again sorry for my dumb question:p

So i use the following code:

 Network.natFacilitatorIP = Network.player.externalIP;
 Network.natFacilitatorPort = Network.player.externalPort;
 Network.incomingPassword = "password";
 Network.InitializeServer (100, 5274, !Network.HavePublicAddress());

But for some reason this works only in the editor! In the editor it uses the public ip of my router and the correct port. In the build it uses an other port and the extarnal ip is: UNASSIGNED_SYSTE$$anonymous$$_ADDRESS

EDIT: If i delete this:

 Network.natFacilitatorIP = Network.player.externalIP;
 Network.natFacilitatorPort = Network.player.externalPort;

i got the correct external ip in the build but a incorrect external port. In addtion i got an error message in the editor:

 NAT target 0 not connected to NAT faciliator ip:port