ProSecure Unified Threat Management (UTM) Appliance Reference Manual

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 must act as the responder.

Figure B-12

The IP addresses of the gateway WAN ports can be either fixed or dynamic. If an IP address is dynamic, you must use a FQDN. If an IP address is fixed, an FQDN is optional.

VPN Gateway-to-Gateway

The following situations exemplify the requirements for a gateway VPN firewall such as an UTM to establish a VPN tunnel with another gateway VPN firewall:

Single gateway WAN ports

Redundant dual gateway WAN ports for increased reliability (before and after rollover)

Dual gateway WAN ports for load balancing

VPN Gateway-to-Gateway: Single Gateway WAN Ports (Reference Case)

In a configuration with two single WAN port gateways, either gateway WAN port can initiate the VPN tunnel with the other gateway WAN port because the IP addresses are known in advance (see Figure B-13 on page B-14).

Network Planning for Dual WAN Ports (Dual-WAN Port Models Only)

B-13

v1.0, January 2010

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NETGEAR UTM5-100NAS, UTM50-100NAS manual VPN Gateway-to-Gateway, VPN Road Warrior Dual Gateway WAN Ports for Load Balancing