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ProSafe Quad WAN Gigabit Firewall FR538G Reference Manual
D-8 Network Planning for Quad WAN Ports
v1.0, November 2007
In the single WAN case ( Figure D-4 ), the WAN’s Internet address is either fixed IP or a fully-
qualified domain name if the IP address is dynamic.
Inbound Traffic to Quad WAN Port Systems
The IP address range of the firewall’s WAN port must be both fixed and public so that the public
can send incoming traffic to the multiple exposed hosts when this feature is supported and enabled.
Inbound Traffic: Quad WAN Ports for Improved Reliability
In the quad WAN port case with rollover ( Figure D-5 ), the WAN’s IP address will always change
at rollover. A fully-qualified domain name must be used that toggles between the IP addresses of
the WAN ports (i.e., WAN1 or WAN2).
Figure D-4
Figure D-5