Port forward free download manager4/14/2023 Port forwarding is critical for remote access to items on private networks. ![]() NAT tables store information about what maps are made during a connection. This is where a Network Address Translation (NAT) table comes into play. There’s an important detail involved in sending that connection request: The router has to remember how it mapped your device’s IP address and port to its own. ![]() (If you’re particularly curious, here’s the full ICANN port registration list.) After masking your host IP address with the router’s public-facing IP address, it sends the connection request forward to its destination. ![]() The router then reads the request and masks ( maps) your device’s IP address and port with the router’s public-facing IP address and a relevant port. Your device is the host or source for the connection. When you’d like to connect to the internet - say, to check your email, visit social media, or access cloud file storage - a connection request gets sent from your device to the router, detailing your device’s IP address and an associated port for the request. That IP address is unique to your device on the network, which is important for the router in identifying the device. is assigned an IP address on that network through a process called DHCP (Dynamic Host Configuration Protocol). Once connected, your device - laptop, cell phone, tablet, etc. It typically (but not always) requires a password or some form of authentication to connect. ![]() A “private LAN” could be your home Wi-Fi, your office Wi-Fi, or even the free Wi-Fi at a coffee shop.
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