PLANET CS-2001 - Manual (Page 112)

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3.1.5 Deploying the CS-2001 between the Gateway and LAN
(configuring two subnets, one using Transparent Routing, the
other one using NAT/Routing) for the LAN users to access the
Internet
Prerequisite Setup (Note: IP addresses used as examples only)
Gateway’s LAN IP addresses are 192.168.1.1 (192.168.1.x/24) and 192.168.2.1
(192.168.2.x/24).
Configure Port1 as WAN1(192.168.1.2) and connect it to the gateway’s LAN.
Specify a static route, then packets that sent to 192.168.2.x/24 will be sent to WAN1.
Configure Port2 as LAN1 (Transparent Routing) and connect it to the LAN PCs (IP
range:192.168.1.x/24, default gateway: 192.168.1.1) LAN PCs may use the original
IP to access the Internet.
Configure Port3 as LAN2 (192.168.2.1, NAT/ Routng, IP range: 192.168.2.x/24) and
connect it to the user’s PC (default gateway: 192.168.2.1). LAN PCs may use the
original IP to access the Internet.
You may create the policy to establish the connection between LAN1 and LAN2.