ZyXEL Communications VMG1312-B Series, User Manual

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Chapter 11 Network Address Translation (NAT)
VMG1312-B Series User’s Guide
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t hird ( C in t he exam ple) . You assign t he LAN I P addresses and t he I SP assigns t he WAN I P address.
The NAT net work appears as a single host on t he I nt ernet .
Figure 72 Mult iple Servers Behind NAT Exam ple
Click N e t w or k Se t t in g > N AT > Por t For w a r ding t o open t he following screen.
See Appendix F on page 359 for port num bers com m only used for part icular services.
Figure 73 Net work Set t ing > NAT > Port Forwarding
The following t able describes t he fields in t his screen.
Table 51 Net work Set t ing > NAT > Port Forwarding
LABEL DESCRIPTION
Add new rule Click t his t o add a new rule.
# This is t he index num ber of t he ent ry.
St at us This field displays whet her t he NAT rule is act ive or not . A yellow bulb signifies t hat t his r ule
is act ive. A gray bulb signifies t hat t his rule is not act ive.
Service Nam e This show s t he service’s nam e.
WAN I nt er face This show s t he WAN int erface t hrough w hich t he service is forwarded.
WAN I P This field displays t he incom ing packet ’s dest inat ion I P address.
Server I P
Address This is t he server ’s I P address.
St art Port This is t he first ext ernal port num ber t hat ident ifies a ser vice.
End Por t This is t he last ext ernal port num ber t hat ident ifies a service.
Translat ion
St art Port This is t he fir st int er nal por t num ber t hat ident ifies a service.
Translat ion End
Port This is t he last int er nal por t num ber t hat ident ifies 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