ZyXEL Communications ZyWall 35 Support Notes page 39

ZyWALL 35 Support Notes
4. NAT Setup (Go to ADVANCED >> NAT)
Step1. Choose Address Mapping rules for WAN1 and WAN2. But since we suppose ISDN router on
WAN2 can do NAT port mapping, and due to some applications may not accept it's IP address being
translated twice, so we disable NAT function on WAN2. So users need to configure NAT port
mapping on the ISDN by themselves. If it's not the same case as your application, you can still turn
on NAT function of WAN2. And the settings are just the same as what you configure on WAN1.
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