ZyXEL Communications FMG3025-D10A IP Phone User Manual


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Chapter 10 Network Address Translation (NAT)
FMG3024-D10A / FMG3025-D10A Series User’s Guide
139
Figure 63 How NAT Works
192.168.1.13
192.168.1.10
192.168.1.11
192.168.1.12
SA
192.168.1.10
SA
IGA1
Inside Local
IP Address
192.168.1.10
192.168.1.11
192.168.1.12
192.168.1.13
Inside Global
IP Address
IGA 1
IGA 2
IGA 3
IGA 4
NAT Table
WAN
LAN
Inside Local
Address (ILA)
Inside Global
Address (IGA)
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