Netgear FVS336G-300NAS Specifications Page 639

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Network Planning for Multiple WAN Ports
639
ProSAFE Dual WAN Gigabit WAN SSL VPN Firewall FVS336Gv3
The IP addresses of the WAN ports can be either fixed or dynamic, but you always must use
an FQDN because the active WAN port could be either WAN1 or WAN2 (that is, the IP
address of the active WAN port is not known in advance).
After a rollover of the WAN port occurs, the previously inactive gateway WAN port becomes
the active port (port WAN2 in the following figure) and the remote computer client must
reestablish the VPN tunnel. The gateway WAN port must act as the responder.
Figure 23. Telecommuter example in a dual WAN port configuration after auto-rollover
The purpose of the FQDN in this case is to toggle the domain name of the gateway firewall
between the IP addresses of the active WAN port (that is, WAN1 and WAN2) so that the
remote computer client can determine the gateway IP address to establish or reestablish a
VPN tunnel.
VPN Telecommuter: Dual-Gateway WAN Ports for Load Balancing
In a gateway configuration with dual WAN ports that function in load balancing mode, the
remote computer initiates the VPN tunnel with the appropriate gateway WAN port (that is,
port WAN1 or WAN2 as necessary to balance the loads of the two gateway WAN ports)
because the IP address of the active WAN port is not known in advance. The selected
gateway WAN port must act as the responder.
Figure 24. Telecommuter example in a dual WAN port configuration with load balancing
The IP addresses of the gateway WAN ports can be either fixed or dynamic. If an IP address
is dynamic, you must use an FQDN. If an IP address is fixed, an FQDN is optional.
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