Wan Failover And Dns; Configuring Wan Failover With A Second Broadband Connection - Watchguard Firebox X20E User Manual

WAN Failover and DNS

When you use WAN Failover, it is a good idea to enter two DNS server addresses when you configure
DHCP settings for the trusted and optional networks. Some ISPs allow queries to their DNS servers only
if the query comes from that ISP network. If you leave the DNS server information blank in the trusted
network DHCP settings, the Edge continues to use the WAN1 DNS server after it fails over to WAN2. If
the WAN2 IPS does not allow that DNS server, WAN Failover does not work. To correct this, enter the
DNS server address for the WAN1 ISP as the primary address. Enter the DNS server address for the
WAN2 ISP as the secondary address. When the Edge fails over from WAN1 to WAN2, the Edge queries
the DNS server used by the ISP on WAN1. But, if it is refused, it uses the secondary DNS server.

Configuring WAN Failover with a Second Broadband Connection

To configure the WAN Failover network:
Connect one end of an Ethernet cable to the WAN2 interface. Connect the other end to the
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source of the secondary external network connection. This connection can be a cable modem or
a hub.
To connect to the System Status page, type https:// in the browser address bar, followed by the
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IP address of the Firebox X Edge trusted interface.
The default URL is: https://192.168.111.1
Configure the failover network with the WAN Failover Setup Wizard or with the Network page of
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the configuration pages, as described in the subsequent two sections.
Enabling WAN Failover with the Setup Wizard
From the navigation bar, select Wizards.
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Adjacent to Configure the automatic WAN failover capability of your Firebox Edge, click Go.
2
Use the instructions on the screens.
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The WAN Failover Setup Wizard includes these steps:
Welcome
The first screen tells you about the wizard.
Select the secondary interface
Use this screen to set the secondary interface your Firebox X Edge uses.
Configure the broadband interface
If you use a broadband interface, select the method your ISP uses to get your IP address.
Identify the computers to connect
Type the IP addresses of computers to which the Firebox X Edge can connect.
The WAN Failover Setup Wizard is complete
You must restart your Firebox X Edge to activate the WAN Failover feature.
Enabling WAN Failover manually
From the navigation bar, select Network > WAN Failover.
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The WAN Failover page appears.
User Guide
Using the WAN Failover Option
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