Netgear WNR2200 - N300 Wireless Router 사용자 설명서

Customizing Your Network Settings

5-8

The default DMZ server feature is helpful when you are using some online games and 
videoconferencing applications that are incompatible with Network Address Translation (NAT). 
The router is programmed to recognize some of these applications and to work correctly with 
them, but there are other applications that might not function well. In some cases, one local 
computer can run the application correctly if that computer’s IP address is entered as the default 
DMZ server.

Incoming traffic from the Internet is usually discarded by the router unless the traffic is a response 
to one of your local computers or a service that you have configured in the Port Forwarding/Port 
Triggering screen. Instead of discarding this traffic, you can have it forwarded to one computer on 
your network. This computer is called the default DMZ server.

The WAN Setup screen lets you configure a default DMZ server.

To assign a computer or server to be a default DMZ server: 

1. Click the Default DMZ Server check box.

2. Type the IP address.

NAT Filtering

Network Address Translation (NAT) determines how the router processes 
inbound traffic. Secured NAT provides a secured firewall to protect the 
computers on the LAN from attacks from the Internet, but might prevent some 
Internet games, point-to-point applications, or multimedia applications from 
functioning. Open NAT provides a much less secured firewall, but allows 
almost all Internet applications to function. 

Disable SIP ALG

Select this feature if you have a SIP (Session Initiation Protocol) telephone or 
other SIP base devices, and you want them to communicate with other 
people. If you have been unable to build a successful SIP connection, 
selecting this check box allows for such a connection without compromising 
other SIP ALG (Application-level gateway) firewall settings, such as Disable 
SPI Firewall. If you are not using SIP devices, leave this check box 
unchecked.

Warning: DMZ servers pose a security risk. A computer designated as the default DMZ 

server loses much of the protection of the firewall and is exposed to exploits 
from the Internet. If compromised, the DMZ server computer can be used to 
attack other computers on your network.