ZyWALL 5 User’s Guide
134 Chapter 7 WAN Screens
7.5 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.
Figure 47 Traffic Redirect WAN Setup
The following network topology allows you to avoid triangle route security issues (see
Appendix G on page 585) 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 48 Traffic Redirect LAN Setup
7.6 Configuring Traffic Redirect
To change your ZyWALL’s Traffic Redirect settings, click WAN, then the Traffic Redirect
tab. The screen appears as shown.
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