How To Setup Dial Backup - ZyXEL Communications P-791R V2 Support Notes

• How to avoid triangle route
(1) IP Aliasing
The folloing network topology allows you to avoid triangle route security issues
when the backup gateway is connected to the LAN. Use IP alias to configure
the LAN into two or three logical networks with the P-791R v2 itself as the
gateway for each LAN network. Put the protected LAN in one subnet(Subnet 1
in the following figure) and the backup gateway in another subnet(Subnet 2).
Configure filters that allow packets from the protected LAN(Subnet 1) to the
backup gateway (Subnet 2).
Traffic redirect LAN setup example 1:
(2) Deploy your second gateway on WAN side
Put all of your network gateways on the WAN side as the following figure
shows. This ensures that all incoming network traffic passes through your
P-791R v2 to your LAN. Therefore your LAN is protected.
Traffic redirect LAN setup example 2:

19. How to setup Dial Backup?

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P-791R v2 Support Notes
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