ZyXEL Communications ZyWall USG 2000 User Manual page 279

The firewall is enabled, so you also need to create a rule to allow traffic in from the
WAN zone.
Figure 168 NAT 1:1 Example Network Topology
192.168.1.21
NAT 1:1 Address Objects
Use Object > Address > Add to create address objects for the private and public
IP addresses (LAN_SMTP and WAN_EG) as shown next.
Figure 169 Create Address Objects
NAT 1:1 Virtual Server
This section sets up a virtual server rule that changes the destination of SMTP
traffic coming to IP address 1.1.1.1 at the ZyWALL's ge3 interface, to the LAN
ZyWALL USG 2000 User's Guide
LAN
Chapter 16 Virtual Servers
ge3: 1.1.1.1
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