NETGEAR SRX5308 - ProSafe® Quad WAN Gigabit SSL VPN Firewall Reference Manual page 338

ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308 Reference Manual
The purpose of the FQDN is to toggle the domain name of the gateway between the IP addresses
of the active WAN port that is, WAN1 and WAN2) so that the remote PC 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 dual WAN port load balancing gateway configuration, the remote PC client 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 remote NAT router
is not known in advance. The selected gateway WAN port must act as the responder.
Figure B-20
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.
B-18 Network Planning for Multiple WAN Ports
v1.0, April 2010