Netgear R6220 User Manual download pdf (Page 109)

Network Settings

109

AC1200 Smart WiFi Router with External Antennas

• Disable IGMP Proxying. IGMP proxying allows a computer on the local area network

(LAN) to receive the multicast traffic it is interested in from the Internet. If you do not

need this feature, you can select this check box to disable it.

• MTU Size (in bytes). The normal MTU (maximum transmit unit) value for most

Ethernet networks is 1500 bytes, or 1492 bytes for PPPoE connections. Change the

MTU only if you are sure that it is necessary for your ISP connection. See

Change the

MTU Size on page 35.

• NAT Filtering. Network Address Translation (NAT) determines how the router

processes inbound traffic. Secured NAT protects computers on the LAN from attacks

from the Internet but might prevent some Internet games, point-to-point applications,

or multimedia applications from working. Open NAT provides a much less secured

firewall but allows almost all Internet applications to work.

• VPN passthrough. These features will be implemented in a firmware upgrade.

5. Click the Apply button.

Your changes are saved.

Set Up a Default DMZ Server

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 other applications might not function well. In some cases, one local

computer can run the application correctly if the IP address for that computer is entered as

the default DMZ server.

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.

The router usually detects and discards incoming traffic from the Internet that is not a

response to one of your local computers or a service that you configured in the Port

Forwarding/Port Triggering screen. Instead of discarding this traffic, you can specify that the

router forwards the traffic to one computer on your network. This computer is called the

default DMZ server.

 To set up a default DMZ server:

1. Launch a web browser from a computer or wireless device that is connected to the

network.

2. Type http://www.routerlogin.net or http://www.routerlogin.com.

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Netgear R6220 User Manual Page 109