NETGEAR UTM10EW-100NAS, UTM25-100NAS, UTM25EW-100NAS Inbound Traffic to a Dual WAN Port System

ProSecure Unified Threat Management UTM10 or UTM25 Reference Manual

In the single WAN case, the WAN’s Internet address is either fixed IP or a FQDN if the IP address is dynamic.

Figure B-4

Inbound Traffic to a Dual WAN Port System

The IP address range of the UTM’s WAN port must be both fixed and public so that the public can send incoming traffic to the multiple exposed hosts when this feature is supported and enabled.

Inbound Traffic: Dual WAN Ports for Improved Reliability

In a dual-WAN port auto-rollover configuration, the WAN port’s IP address will always change when a rollover occurs. You must use a FQDN that toggles between the IP addresses of the WAN ports (that is, WAN1 or WAN2).

Figure B-5

Inbound Traffic: Dual WAN Ports for Load Balancing

In a dual-WAN port load balancing configuration, the Internet address of each WAN port is either fixed if the IP address is fixed or a FQDN if the IP address is dynamic (see Figure B-6 on page B-9).

Note: Load balancing is implemented for outgoing traffic and not for incoming traffic. Consider making one of the WAN port Internet addresses public and keeping the other one private in order to maintain better control of WAN port traffic.

B-8 Network Planning for Dual WAN Ports (UTM25 Only)

v1.0, September 2009