Netgear FVX538v1 – ProSafe VPN Firewall Dual WAN with 8-Port 10/100 and 1 Gigabit LAN Port Switch 参照マニュアル

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ProSafe VPN Firewall 200 FVX538 Reference Manual
Network Planning for Dual WAN Ports
B-17
v1.0, March 2009
VPN Gateway-to-Gateway: Dual Gateway WAN Ports for Load Balancing
In the case of the dual WAN ports on the gateway VPN firewall, either of the gateway WAN ports 
at one end can be programmed in advance to initiate the VPN tunnel with the appropriate gateway 
WAN port at the other end as necessary to manage the loads of the gateway WAN ports because 
the IP addresses of the WAN ports are known in advance.
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 Telecommuter (Client-to-Gateway Through a NAT Router)
The following situations exemplify the requirements for a remote PC client connected to the 
Internet with a dynamic IP address through a NAT router to establish a VPN tunnel with a gateway 
VPN firewall at the company office:
Single gateway WAN port
Redundant dual gateway WAN ports for increased reliability (before and after rollover)
Dual gateway WAN ports used for load balancing
Figure B-16
Note: The telecommuter case presumes the home office has a dynamic IP address and 
NAT router.