Internet gateway - Computer Definition
(1) See cable/DSL gateway.
(2) Another term for "router," specifically when the router is in a local network, and its primary purpose is to forward packets to the Internet and receive packets from the Internet. See router.
(3) A router or server that converts IP packets to IPX, AppleTalk or some other non-IP format and vice versa. It is used to connect non-IP networks to the Internet.