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  2. localhost - Wikipedia

    https://en.wikipedia.org/wiki/Localhost

    In computer networking, localhost is a hostname that refers to the current computer used to access it. The name localhost is reserved for loopback purposes. [ 1 ] It is used to access the network services that are running on the host via the loopback network interface.

  3. Network address translation - Wikipedia

    https://en.wikipedia.org/wiki/Network_address_translation

    It determines the destination for that packet, based on DNAT (port forwarding) rules for the destination. If the data were sent to port 80 and a DNAT rule exists for port 80 directed to 192.168.1.2, then the host at that address receives the packet. If no applicable DNAT rule is available, the router drops the packet.

  4. Secure Shell - Wikipedia

    https://en.wikipedia.org/wiki/Secure_Shell

    UDP port forwarding; X.509 certificates; OpenID Connect; However, the name SSH3 is under discussion, and the project aims to rename itself to a more suitable name. [34] The discussion stems from the fact that this new implementation significantly revises the SSH protocol, suggesting it should not be called SSH3.