PLANET CS-500 - Manual (Page 5)

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Chapter 4
Physical Connection and DMZ Operation Mode
This section describes the three different operation mode of CS-500, DMZ disable, NAT
mode and DMZ transparent mode.
CS-500 DMZ port supports three operation modes, Disable, NAT and Transparent. In
Disable mode, the DMZ port is not active. In transparent mode, CS-500 works as proxy
with forward DMZ packet to WAN and forward WAN packet to DMZ. The DMZ and WAN
side IP addresses are in the same subnet.
In NAT mode, DMZ side user will share one public IP address of WAN port to make Internet
connection. Please find the following two pictures for example.
4.1 Transparent Mode Connection Example