Netgear ProSafe FVX538 User Manual download pdf (Page 15)

Network Planning Guide for ProSafe VPN Firewall Router FVX538

Network Planning 2-5

October 2004

Figure 2-5: Dual WAN port case for exposed host with load balancing

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.

Multiple Exposed Hosts: Single WAN Port (Reference Case)

In the single WAN case (Figure 2-6), the WAN port’s IP address range must be fixed.

Figure 2-6: 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.

Multiple Exposed Hosts: Dual WAN Ports for Load Balancing

In the dual WAN port case for load balancing (Figure 2-7), the IP address range of each WAN port

must be fixed.

Router

netgear1.dyndns.org

WAN1 IP

Dual WAN Ports (Load Balancing)

WAN2 IP

netgear2.dyndns.org

IP addresses of WAN ports:

use of fully-qualified domain names

required for dynamic IP addresses

and optional for fixed IP addresses

exposed host

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

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Netgear ProSafe FVX538 User Manual Page 15