ZyXEL Communications eir F1000, Руководство пользователя

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eir F1000 Modem User
’s Guide
Chapter 9 Network Address Translation (NAT)
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 81
Multiple Servers Behind NAT Example
A=192.168.1.33
B=192.168.1.34
LAN
192.168.1.1
WAN
IP Address assigned by ISP
C=192.168.1.3
D=192.168.1.36
Click Network Setting > NAT > Port Forwarding to open the following screen.
See Appendix F on page 347 for port numbers commonly used for particular services.
Figure 82
Network Setting > NAT > Port Forwarding
The following table describes the fields in this screen.
Table 54
Network Setting > NAT > Port Forwarding
LABEL DESCRIPTION
Add new rule Click this to add a new rule.
# This is the index number of the entry.
Status 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.
Service Name This shows the service’s name.
WAN Interface This shows the WAN interface through which the service is forwarded.
WAN IP This field displays the incoming packet’s destination IP address.
Server IP
Address This is the server’s IP address.
Start Port This is the first external port number that identifies a service.
End Port This is the last external port number that identifies a service.
Translation
Start Port This is the first internal port number that identifies a service.
Translation End
Port This is the last internal port number that identifies a service.