Nat Application - ZyXEL Communications FSG2200HNU User Manual

8.3.4 NAT Application

The following figure illustrates a possible NAT application, where three inside LANs
(logical LANs using IP alias) behind the ZyXEL Device can communicate with three
distinct WAN networks.
Figure 50 NAT Application With IP Alias
Corporation B
LAN2: 192.168.1.X
Network Server
"Admin=192.168.1.1
NAT Server
192.168.1.1
LAN2: 192.168.2.X
Network Server
"Sales"=192.168.2.1
NAT Server
192.168.2.1
LAN3: 192.168.3.X
Network Server
"R&D"=192.168.3.1
NAT Server
192.168.3.1
FSG2200HNU User's Guide
Chapter 8 Network Address Translation (NAT)
Corporation A
Server in
Admin Network
=IP1 (IGA 1)
WAN Addresses: LAN Addresses: (Default IPs)
IGA 1 ---------------> 192.168.1.1
IGA 2 ---------------> 192.168.2.1
IGA 3 ---------------> 192.168.3.1
Server in
Sales Network
=IP2 (IGA 2)
Server in
R&D Network
=IP3 (IGA 3)
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