Netgear FVS338 참조 매뉴얼

3-2

Network Planning

Failover (

) for the dual WAN port case is different from the single gateway WAN port 

case when specifying the IP address. Only one WAN port is active at a time and when it fails over, 
the IP address of the active WAN port always changes. Hence, the use of a fully-qualified domain 
name is always required, even when the IP address of each WAN port is fixed. 

Features such as multiple exposed hosts are not supported in general when using dual WAN port 
failover because the IP addresses of each WAN port must be in the identical range of fixed 
addresses.

Incoming traffic from the Internet is normally discarded by the firewall unless the traffic is a 
response to one of your local computers or a service that you have configured in the Incoming 
Rules menu. Instead of discarding this traffic, you can have it forwarded to one or more LAN hosts 
on your network. These LAN hosts are called exposed hosts. The addressing of the router’s dual 
WAN port depends on the configuration being implemented:

Note: Once the gateway router WAN port fails over, the VPN tunnel collapses and must 
be re-established using the new WAN IP address.

Note: In certain locales, an ISP has been able to provision the same IP address for the 
broadband and PSTN service so that the failover to a serial connection would be as 
seamless as possible.