porttivälitys
Porttivälitys, often translated as port forwarding, is a networking technique used to direct traffic from one network device to another. It is commonly implemented on routers and firewalls to allow external devices to access services running on internal private networks. When a request arrives at a public IP address and a specific port number, the port forwarding rule tells the router to redirect that request to a particular device's private IP address and port within the local network. This is essential for making services like game servers, web servers, or remote access applications accessible from the internet.
The configuration typically involves specifying the external port, the internal IP address of the target device,