ZyXEL Communications 5 Series - Manual (Page 170)

ZyWALL 5/35/70 Series User’s Guide
170 Chapter 8 WAN Screens
8.13 Traffic Redirect
Traffic redirect forwards WAN traffic to a backup gateway when the ZyWALL cannot
connect to the Internet through its normal gateway. Connect the backup gateway on the WAN
so that the ZyWALL still provides firewall protection for the LAN.
Figure 73 Traffic Redirect WAN Setup
IP alias allows you to avoid triangle route security issues when the backup gateway is
connected to the LAN or DMZ. Use IP alias to configure the LAN into two or three logical
networks with the ZyWALL 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 a LAN to LAN/ZyWALL firewall rule that forwards packets
from the protected LAN (Subnet 1) to the backup gateway (Subnet 2).
Figure 74 Traffic Redirect LAN Setup
8.14 Configuring Traffic Redirect
To change your ZyWALL’s traffic redirect settings, click NETWORK > WAN > Traffic
Redirect. The screen appears as shown.