Network Planning for Multiple WAN Ports
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ProSAFE Dual WAN Gigabit WAN SSL VPN Firewall FVS336Gv3
Figure 15. Dual WAN ports in load balancing mode
Planning for Inbound Traffic
Incoming traffic from the Internet is normally discarded by the VPN firewall unless the traffic is
a response to one of your local computers or a service for which you have configured an
inbound rule. Instead of discarding this traffic, you can configure the VPN firewall to forward it
to one or more LAN hosts on your network.
The addressing of the VPN firewall’s dual WAN port depends on the configuration being
implemented.
The following sections provide information about planning for inbound traffic:
• Inbound Traffic to a Single WAN Port System
• Inbound Traffic to a Dual WAN Port System
Table 11. IP addressing requirements for exposed hosts in a dual WAN port configuration
Configuration and
WAN IP Address
Single WAN Port
(Reference Case)
Dual WAN Port Cases
Rollover Load Balancing
Inbound traffic
• Port forwarding
• Port triggering
Fixed Allowed
(FQDN optional)
FQDN required Allowed
(FQDN optional)
Dynamic FQDN required FQDN required FQDN required
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