Figure 176 Nat 1:1 Example Network Topology; Figure 177 Create Address Objects - ZyXEL Communications ZyWALL USG 300 User Manual

Unified security gateway

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Chapter 16 Virtual Servers

Figure 176 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.

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 SMTP server's IP address

(192.168.1.21). This is also called Destination NAT (DNAT)

ge2: 1.1.1.1

ZyWALL USG 300 User's Guide