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xDSL Network Module for the UTM9S and UTM25S
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ProSecure Unified Threat Management (UTM) Appliance
d. From the corresponding drop-down list on the right, select a WAN interface, the USB
interface, or the DSL interface to function as the backup interface.
Note: Ensure that the backup interface is configured before enabling
auto-rollover mode.
3. Click Apply to save your settings.
Configure the Failure Detection Method
To configure the failure detection method:
1. Select Network Config > WAN Settings. The WAN screen displays (see Figure 322 on
page 553).
2. Click the Edit button in the Action column of the interface that you selected as the primary
interface (see Figure 323 on page 554, which shows the SLOT-2 ISP Settings screen as an
example).
3. Click the Advanced option arrow at the upper right of the screen. The WAN Advanced
Options screen displays for the interface that you selected. (For an image of the entire
screen, see Figure 338 on page 575, which shows the WAN Advanced Options screen for
the DSL interface.)
4. Locate the Failure Detection Method section onscreen (see the following figure). Enter the
settings as explained in the following table.
Figure 331.
Table 145. Failure detection method settings
Setting Description
WAN Failure Detection Method
Select a failure detection method from the drop-down list. DNS queries or pings are sent through the
interface that is being monitored. The retry interval and number of failover attempts determine how quickly
the UTM9S or UTM25S switches from the primary link to the backup link in case the primary link fails, or
when the primary link comes back up, switches back from the backup link to the primary link.
WAN DNS DNS queries are sent to the DNS server that is configured in the Domain Name
Server (DNS) Servers section of the WAN ISP screen (see Manually Configure the
xDSL Internet Connection on page 556).