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B
B. Network Planning for Multiple WAN
Ports (IPv4 Only)
This appendix describes the factors to consider when planning a network using a firewall that
has more than one WAN port.
This appendix contains the following sections:
• What to Consider Before You Begin
• Overview of the Planning
Process
• Inbound Traffic
• Virtual Private Networks
What to Consider Before You Begin
• Cabling and Computer Hardware Requirements
• Computer Network Configuration Requirements
• Internet Configuration Requirements
The VPN firewall 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. De
termine whether you will use one or several 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 several 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:
• Fully qua
lified domain name (FQDN)
- For auto-rollover mod
e, you will need an FQDN to implement features such as
exposed hosts and virtual private networks.
- For loa
d balancing mode, you might still need an FQDN either for
convenience or to remotely access a dynamic WAN IP address.