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4.3.2 Configure the Policy Route
Now you need to configure a policy route that has the USG use the range of public IP addresses as the
source address for WAN to LAN traffic.
Click Configuration > Network > Routing > Policy Route > Add (in IPv4 Configuration). It
is recommended to add a description. This example uses LAN-to-WAN-Range.
Specifying a Source Address is also recommended. This example uses LAN1_SUBNET.
Set the Source Network Address Translation to Public-IPs and click OK.
4.4 How to Use Device HA to Backup Your USG
Use device high availability (HA) to set up an additional USG as a backup gateway to ensure the
default gateway is always available for the network.
Active-Passive Mode and Legacy Mode
Active-passive mode has a backup USG take over if the master USG fails and is recommended for
general device failover deployments. Use legacy mode if you need a more complex relationship
between the master and backup USGs, such as having both USGs active or using different USGs as the
master for individual interfaces. The USGs must all use the same device HA mode (either
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