ZyXEL Communications P873HNUP User Manual page 161

third (C in the example). You assign the LAN IP addresses and the ISP assigns the WAN IP address.
The NAT network appears as a single host on the Internet.
Figure 59 Multiple Servers Behind NAT Example
A=192.168.1.33
B=192.168.1.34
C=192.168.1.3
Click Network Settings > NAT > Port Forwarding to open the following screen.
See Appendix E on page 333
Figure 60 Network Settings > NAT > Port Forwarding
The following table describes the fields in this screen.
Table 43 Network Settings > NAT > Port Forwarding
LABEL
Add new rule
#
Status
Service Name
WAN Interface
External Start
Port
External End Port
Internal Start
Port
Internal End Port
P-873HNUP-51B User's Guide
LAN
192.168.1.1
D=192.168.1.36
for port numbers commonly used for particular services.
DESCRIPTION
Click this to add a new rule.
This is the index number of the entry.
This field displays whether the NAT rule is active or not. A yellow bulb signifies
that this rule is active. A gray bulb signifies that this rule is not active.
This shows the service's name.
This shows the WAN interface through which the service is forwarded.
This is the first external port number that identifies a service.
This is the last external port number that identifies a service.
This is the first internal port number that identifies a service.
This is the last internal port number that identifies a service.
Chapter 11 Network Address Translation (NAT)
WAN
IP Address assigned by ISP
161