ZyXEL Communications ZyWall USG 2000 User Manual page 284

Chapter 16 Virtual Servers
mapping's virtual server rule for SMTP traffic coming to IP 1.1.1.1 from ge3. So
you must configure a similar virtual server rule for ge3.
Figure 176 NAT Loopback Virtual Server
NAT
1.1.1.1
Destination 1.1.1.1
Destination 192.168.1.21
SMTP
SMTP
LAN
192.168.1.21 192.168.1.89
Click Network > Virtual Server and the + symbol and create the virtual server
rule as shown next. This virtual server rule is the same as in NAT 1:1 Virtual
Server on page 279, except you use the ge1 interface instead of the ge3
interface. This rule maps TCP port 25 (SMTP) traffic destined for IP address
1.1.1.1 and coming in on ge3 to the SMTP server (IP address 192.168.1.21). In
this example the SMTP server also uses port 25, so the Mapped Port is set to 25.
Figure 177 Create a Virtual Server
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