These are, of course, external addresses (and ports, when communication is involved). On the Internet, however, there are servers and routers and other devices and these are identified with a set of unique, fixed IP addresses. Most of these addresses are by default something like 192.168.1.1, meaning they are far from unique. ![]() ![]() But all these are internal addresses, valid only in your Local Area Network (LAN). Each of these has its own IP address and each communicates using different ports. Your local network, for example, is made up of your laptop, your printer, a webcast device, a smart TV, your WiFi-connected phone, etc. You may also want to change the remote desktop port for your Windows VPS. While an IP address is a way to find individual devices, a port identifies the services or applications that the device is running on the network. Why would anyone want to do that? It’s because one of the two pairs is external and the other internal. On paper, at least, port forwarding is easy enough to define: it’s mapping an IP address and port number to another IP address and another port number. Port forwarding may seem a complicated concept from a user’s nightmares or as simple as a few clicks, depending on what you are going to do with it. ![]() 4 You’re Done - or Are You? What is Port Forwarding?
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