ZyXEL Communications P-3202HN-Ba User Manual page 116

Chapter 9 Network Address Translation (NAT)
The following example has two web servers on a LAN. Server A uses IP address
192.168.1.33 and server B uses 192.168.1.34. Both servers use port 80. The
letters a.b.c.d represent the WAN port's IP address. The IAD translates port 8080
of traffic received on the WAN port (IP address a.b.c.d) to port 80 and sends it to
server A (IP address 192.168.1.33). The IAD also translates port 8100 of traffic
received on the WAN port (also IP address a.b.c.d) to port 80, but sends it to
server B (IP address 192.168.1.34).
Note: In this example, anyone wanting to access server A from the Internet must use
port 8080. Anyone wanting to access server B from the Internet must use port
8100.
Figure 51 Port Translation Example
A=192.168.1.33
HTTP: 80
B=192.168.1.34
HTTP: 80
116
LAN
192.168.1.1
Port Translation
192.168.1.33: 80 <--------> a.b.c.d: 8080
192.168.1.34: 80 <--------> a.b.c.d: 8100
WAN
IAD User's Guide