ZyXEL Communications ZyWall 35 Support Notes page 26

ZyWALL 35 Support Notes
SUA (Single User Account), if you get only one public IP address from your ISP, then you should use SUA.
With SUA, PCs on ZyWALL's LAN side can access Internet without further configuration. If you have internal
servers to be accessed by remote users on Internet, you need to go to ADVANCED -> SUA/NAT -> SUA
Server to setup which service, or port numbers, you would like to forward to which Internal server.
Multi-NAT, if you get multiple public IP addresses from your ISP, then you may use Multi-NAT. With
Multi-NAT, you can choose different types of NAT mapping methods to utilize the public IP addresses. You
should define each NAT mapping rules clearly in ADVANCED -> SUA/NAT -> Address Mapping, so that
internal PCs can access Internet and internal servers can be accessed by remote uses on Internet.
Step 1. Applying NAT in WAN Interface
You can choose the NAT mapping types to either SUA Only or Full Feature in WAN setup.
NETWORK -> WAN
or ADVANCED -> NAT -> NAT Overview
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