VIEWSONIC WR100 - Manual (Page 53)

ViewSonic Wireless Router 49
Gateway: the IP address of the gateway device that allows for
contact between the wireless router and the network or host.
Interface: this interface tells you whether the Destination IP
Address is on the LAN & Wireless (internal wired and wireless
networks), the WAN (Internet), or Loopback (a dummy network
in which one PC acts like a network — necessary for certain
software programs).
10 Click Apply to save your settings.