Network Planning for Dual WAN Ports (Multiple WAN Port Models Only)
566
ProSecure Unified Threat Management (UTM) Appliance
Figure 335.
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 PC client can determine the gateway IP address to establish or reestablish a VPN
tunnel.
VPN Road Warrior: Dual-Gateway WAN Ports for Load Balancing
In a dual WAN port load balancing gateway configuration, the remote PC 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 needs to function as the
responder.
Figure 336.
The IP addresses of the gateway WAN ports can be either fixed or dynamic. If an IP address
is dynamic, you need to use an FQDN. If an IP address is fixed, an FQDN is optional.
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