Netgear FVS338 참조 매뉴얼
Reference Manual for the ProSafe VPN Firewall 50 FVS338
3-4
Network Planning
January 2005
Figure 3-3: Dual WAN port case with exposed host, before and after failover
Multiple Exposed Hosts
The IP address range of the router’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.
send incoming traffic to the multiple exposed hosts when this feature is supported and enabled.
Multiple Exposed Hosts: Single WAN Port (Reference Case)
In the single WAN case (
), the WAN port’s IP address range must be fixed.
Figure 3-4: Single WAN port case with multiple exposed hosts
Multiple Exposed Hosts: Dual WAN Ports for Improved System Reliability
Using multiple exposed hosts with routers that have dual WAN ports for improved system
reliability is a disallowed combination because to do so, the IP addresses of each WAN port would
have to be the identical range of fixed addresses. Instead, use additional routers that have dual
WAN ports with a single exposed host for improved system reliability.
reliability is a disallowed combination because to do so, the IP addresses of each WAN port would
have to be the identical range of fixed addresses. Instead, use additional routers that have dual
WAN ports with a single exposed host for improved system reliability.
Note: In certain locales, an ISP has been able to provision the same IP address for the
broadband and PSTN service so that the failover to a serial connection would be as
seamless as possible.
broadband and PSTN service so that the failover to a serial connection would be as
seamless as possible.
Router
netgear.dyndns.org
WAN1 IP
Dual WAN Ports (Before Failover)
WAN2 IP (N/A)
WAN2 port inactive
Router
WAN1 port inactive
WAN1 IP (N/A)
Dual WAN Ports (After Failover)
WAN2 IP
netgear.dyndns.org
IP address of active WAN port changes after a failover (use of fully-qualified domain names always required)
exposed host
exposed host
X
X
X
X
PSTN
PSTN
Router
22.23.24.25
22.23.24.26
. . .
WAN IPs
Single WAN Port
IP addresses of WAN port must be a fixed block
exposed hosts