Specifications

Chapter 3 Configuring Compex NetPassage 16A
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Virtual Server based on IP Forwarding
If you have subscribed to a range of IP addresses from your ISP, you may also
define Virtual Servers based on IP Forwarding. This type of Virtual Server
forwards all Internet requests, regardless of the TCP port of the application, to
a computer in the private network. Refer to Figure 3.3b.
Figure 3.3b Virtual Server based on IP Forwarding
Figure 3.3b shows two Virtual Servers based on IP Forwarding. One maps the
public IP 203.120.12.11 to private IP 192.168.168.10, and the other maps the
public IP 203.120.12.12 to private IP 192.168.168.20.
3.3.2 Defining Virtual Server based on De-Militarized Zone (DMZ)
Due to the nature of Network Address Translator (NAT), the subnet behind
the NAT cannot be reached from the Internet. If you know the TCP/UDP port
of an application, such as HTTP, you can easily define a Virtual Server based
on Port Forwarding behind the NAT to support a Web Server in your private
subnet. However, if you are uncertain on the TCP/UDP port used by an
application (certain Internet games), or an application utilizes varying
TCP/UDP port, you may define a DMZ host of which Compex NetPassage
16A will direct all the unresolved Internet requests to.
For example, if the WAN interface of Compex NetPassage 16A has been
assigned an IP address of 203.120.12.20 and you have defined a DMZ host
with IP address of 192.168.168.10, all the unresolved Internet requests to
203.120.12.20 will be forwarded to 192.168.168.10, regardless of the
TCP/UDP port.