internalIPinternalPort

internalipinternalport is a descriptive term used in computer networking to refer to the combination of an internal IP address and its internal port number within a private network. It denotes the internal endpoint of a device behind a network address translation (NAT) gateway or firewall. In many configurations, traffic entering or leaving a private network is associated with a mapping that ties an external-facing endpoint to a particular internal endpoint, identified by internalipinternalport.

Usage: In NAT and port forwarding, an external port is mapped to an internalIP:internalPort pair. The internalIP and internalPort specify where the traffic should be delivered inside the LAN. Some configuration interfaces refer to the pair as a single key, sometimes concatenated as internalipinternalport.

Example: A service running on a device with internal IP 192.168.1.42 listening on port 5500 can be reached from outside by a router that forwards external port 8080 to 192.168.1.42:5500; in documentation this internal endpoint could be described as 192.168.1.42:5500, or as the internalipinternalport key 192.168.1.42-5500 depending on syntax.

Security considerations: Access control, least privilege, and logging are important. Not all devices on a network require external exposure; NAT and firewall rules should limit internal endpoints reachable from outside.

Notes: The term is not a formal protocol; it's a descriptive label used in documentation or tool interfaces. See NAT, port forwarding, firewall, UPnP.