ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN FVS336G Reference Manual
C-14 Network Planning for Dual WAN Ports
v1.2, June 2008
The IP addresses of the gateway WAN ports can be either fixed or dynamic. If an IP address is
dynamic, a fully-qualified domain name must be used. If an IP address is fixed, a fully-qualified
domain name is optional.
VPN Gateway-to-Gateway
The following situations exemplify the requirements for a gateway VPN firewall to establish a
VPN tunnel with another gateway VPN firewall:
Single gateway WAN ports
Redundant dual gateway WAN ports for increased reliability (before and after rollover)
Dual gateway WAN ports used for load balancing
VPN Gateway-to-Gateway: Single Gateway WAN Ports (Reference Case)
In the case of single WAN ports on the gateway VPN firewalls (FigureC-13), either gateway
WAN port can initiate the VPN tunnel with the other gateway W AN port because the IP addresses
are known in advance.
Figure C-12