Netgear FVS336G-300NAS Specifications Page 637

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Network Planning for Multiple WAN Ports
637
ProSAFE Dual WAN Gigabit WAN SSL VPN Firewall FVS336Gv3
For a single WAN gateway configuration, use an FQDN when the IP address is dynamic and
either an FQDN or the IP address itself when the IP address is fixed. The situation is different
in dual WAN port gateway configurations.
Dual WAN ports in auto-rollover mode. A gateway configuration with dual WAN ports
that function in auto-rollover mode is different from a gateway configuration with a single
WAN port when you specify the IP address of the VPN tunnel endpoint. Only one WAN
port is active at a time, and when it rolls over, the IP address of the active WAN port
always changes. Therefore, the use of an FQDN is always required, even when the IP
address of each WAN port is fixed.
Note: When the VPN firewall’s WAN port rolls over, the VPN tunnel
collapses and must be reestablished using the new WAN IP address.
However, you can configure automatic IPSec VPN rollover to ensure
that an IPSec VPN tunnel is reestablished.
Figure 19. Dual WAN ports in auto-rollover mode with VPN traffic
Dual WAN ports in load balancing mode. A gateway configuration with dual WAN ports
that function in load balancing mode is the same as a single WAN port configuration
when you specify the IP address of the VPN tunnel endpoint. Each IP address is either
fixed or dynamic based on the ISP: You must use FQDNs when the IP address is
dynamic, and FQDNs are optional when the IP address is static.
Figure 20. Dual WAN ports in load balancing mode with VPN traffic
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