Netgear UTM25-100NAS User Manual

Network Planning for Dual WAN Ports (UTM25 Only)

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This appendix describes the factors to consider when planning a network using a firewall such as 
the UTM25 that has dual WAN ports. This appendix does not apply to the UTM10.

This appendix contains the following sections:

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” on this page.

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The UTM is a powerful and versatile solution for your networking needs. To make the 
configuration process easier and to understand all of the choices that are available to you, consider 
the following before you begin:

1. Plan your network

a.

Determine whether you will use one or both WAN ports. For one WAN port, you might 
need a fully qualified domain name either for convenience or to remotely access a 
dynamic WAN IP address.

b. If you intend to use both WAN ports, determine whether you will use them in auto-

rollover mode for increased system reliability or load balancing mode for maximum 
bandwidth efficiency. See the topics in this appendix for more information. Your decision 
has the following implications:

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Fully qualified domain name (FQDN)

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For auto-rollover mode, you will need a FQDN e to implement features such as 
exposed hosts and virtual private networks. 

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For load balancing mode, you might still need a FQDN either for convenience or 
to remotely access a dynamic WAN IP address.