Dmz & Pass Through 1 - M2M IDG701AM-0T001 User Manual

M2M Cellular Gateway
3.9.7 DMZ & Pass Through
DMZ (De Militarized Zone) Host is a host that is exposed to the Internet cyberspace but still within
the protection of firewall by gateway device. So, the function allows a computer to execute 2‐way
communication for Internet games, Video conferencing, Internet telephony and other special
applications. In some cases when a specific application is blocked by NAT mechanism, you can
indicate that LAN computer as a DMZ host to solve this problem.
In "DMZ" page, there is only one configuration window for "DMZ" feature. The window lets you
activate the DMZ function and specify the IP address in the Intranet to be DMZ host so that the host
under DMZ function can run applications freely that would, otherwise, blocked by NAT mechanism of
the gateway with DMZ feature disabled. That is, the incoming packets issued by an active application in
the Internet are usually blocked outside of the NAT gateway. But the DMZ host can receive those
packets and make replies. That is, it is reactive to outside world. In the meantime, it is also protected
by the gateway firewall.
Configuration
This feature allows you to ask the gateway pass through all normal packets to the DMZ host
behind the NAT gateway only when these packets are not expected to receive by applications in the
gateway or by other client hosts in the Intranet. Certainly, the DMZ host is also protected by the
gateway firewall. Activate the feature and specify the DMZ host with a host in the Intranet when
needed.
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