Chapter 11 Network Address Translation (NAT)
VMG1312-B Series User’s Guide
187
third ( C in the exam ple). You assign the LAN I P addresses and the I SP assigns the WAN I P address.
The NAT net work appears as a single host on the I nt ernet .
Figure 72 Multiple Servers Behind NAT Exam ple
Click Ne t w or k Set t ing > N AT > Port Forw a rdin g to open t he following scr een.
See
Appendix F on page 359 for port num bers com m only used for part icular services.
Figure 73 Net work Sett ing > NAT > Port Forwarding
The following t able describes t he fields in t his screen.
Table 51 Network Sett ing > NAT > Port Forwarding
LABEL DESCRIPTION
Add new rule Click t his to add a new rule.
# This is t he index num ber of the ent r y.
St atus This field displays whether t he NAT rule is act ive or not . A yellow bulb signifies that t his rule
is act ive. A gray bulb signifies t hat t his rule is not act ive.
Service Nam e This shows the service’s nam e.
WAN I nterface This shows the WAN int erface t hrough which t he service is forwarded.
WAN I P This field display s t he incom ing packet ’s dest inat ion I P address.
Server I P
Address
This is the server ’s I P address.
St art Port This is the first ext ernal por t num ber t hat identifies a service.
End Port This is t he last external port num ber t hat identifies a service.
Tr an sl a t i o n
St art Port
This is the fir st int ernal port num ber that ident ifies a service.
Tr a n s l a t i o n En d
Por t
This is the last int ernal port num ber t hat identifies a service.
A=192.168.1.33
D=192.168.1.36
C=192.168.1.3
B=192.168.1.34
WAN
LAN
192.168.1.1
IP Address assigned by ISP
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