Hi devvienuis,
Basically, you just need to add in a listen=1 into your configuration file.
Once you've done that, you need to have your router port forward TCP port 40021 to your workstation running the Noodlyappendagecoin software.
People do this a couple of ways.
Some people give their workstation a static IP on their internal network and then setup port forwarding after configuring the workstation.
Other people configure the router to do a DHCP reservation so that the workstation always gets the same IP address on the network -- so that when you port forward to the specified IP address, you'll always be able to reach the Noodlyappendagecoin software.
Let me know if I can help with your configuration and once you have it online, I should be able to verify for you that indeed the node is reachable externally.
Kind Regards,
-Chicago