wan port ip ip is outside the network, belonging to the public network ip. Primarily to identify the external network, the WAN port used to connect an external network, such as ADSL, DDN, Ethernet and other access lines; LAN port for connecting the home network, the home network of the main switches, hubs or connected PC. It can be said that these two types of external network interface of a class, a class internal.
WAN port can PPPOE dial-up, because in this way the Internet is generally used for broadband Internet access account, but this way the Internet IP addresses are assigned randomly, if it is to have a fixed IP address, you need to set the interface type fixed IP.
It is generally used when direct access to the outside world this computer needs this way. Another interface type to automatically obtain the IP, routers typically required when the rear access router is generally used to automatically obtain IP.
Most multi-port WAN routers also support real-time backup and automatic load balancing, and according to the priority channel specified source or destination address, the flow is automatically re-tasking function problems.