ZyXEL Communications 2 Plus User Manual
Chapter 17 Network Address Translation (NAT)
ZyWALL 2 Plus User’s Guide
342
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 ZyWALL 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
ZyWALL 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).
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 ZyWALL 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
ZyWALL 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).
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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.
port 8080. Anyone wanting to access server B from the Internet must use port
8100.
Figure 222 Port Translation Example
17.6 Port Forwarding Screen
Click ADVANCED > NAT > Port Forwarding to open the Port Forwarding screen.
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If you do not assign a Default Server IP address, the ZyWALL discards all
packets received for ports that are not specified here or in the remote
management setup.
packets received for ports that are not specified here or in the remote
management setup.
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The last port forwarding rule is reserved for Roadrunner services. The rule is
activated only when you set the WAN Encapsulation to Ethernet and the
Service Type to something other than Standard.
activated only when you set the WAN Encapsulation to Ethernet and the
Service Type to something other than Standard.