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180 | Appendix B: Network Planning for Dual WAN Ports
ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336Gv2 Reference Manual
Inbound Traffic: Dual WAN Ports for Improved Reliability
In the dual WAN port case with rollover, 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 (that is, WAN1 or WAN2).
Figure B-5 Inbound Traffic with Dual WAN Ports
Inbound Traffic: Dual WAN Ports for Load Balancing
In the dual WAN port case for load balancing, the Internet address of each WAN port is either
fixed if the IP address is fixed or a fully-qualified domain name if the IP address is dynamic.
Note: Load balancing is implemented for outgoing traffic and not for
incoming traffic. Consider making one of the WAN port Internet
addresses public and keeping the other one private in order to
maintain better control of WAN port traffic.
Figure B-6 Load Balancing with Dual WAN Ports