Also called "port mapping," port forwarding is directing traffic from the outside world to the appropriate server inside a local TCP/IP network. Internet services are identified by a standard port ...

Finally, click the Finish button to configure the settings. At times, you may feel the need to open a port in the Windows firewall to let a specific IP communicate with your computer, for example ...

Sometimes, though, you might want to disable it (or at least configure the firewall with port-forwarding rules) if you want to let network traffic through. Ubuntu's default firewall configuration ...