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  Setting up a port trigger is applicable if you use similar 
applications in two PCs during different times of the day. 
However, it is not suitable for servers behind a router 
because it relies on specific applications to make an outgoing 
connection before it can receive incoming ones. Port 
forwarding can be configured for a server located behind a 
router.
4.3.4 DMZ
Virtual DMZ exposes one client to the Internet, allowing this 
client to receive all inbound packets directed to your Local Area 
Network. 
Inbound traffic from the Internet is usually discarded and routed 
to a specific client only if port forwarding or a port trigger has 
been configured on the network. In a DMZ configuration, one 
network client receives all inbound packets. 
Setting up DMZ on a network is useful when you need incoming 
ports open or you want to host a domain, web, or e-mail server.
Caution:  Opening all the ports on a client to the Internet makes the 
network vulnerable to outside attacks. Please be aware of the security 
risks involved in using DMZ.
To set up DMZ:
1.  From the navigation panel, go to Advanced Settings > WAN > 
DMZ tab.
2.  On the IP Address of Exposed Station text box, enter the IP 
address of the computer which you want to assign to DMZ. 
IP address of Exposed Station: Key in the client’s LAN IP address that will 
provide the DMZ service and be exposed on the Internet. Ensure that 
the server client has a static IP address.
To remove DMZ:
1.  Delete the client’s LAN IP address from the IP Address of 
Exposed Station text box.
2.  When done, click Apply