Netgear DGN1000v3 User Manual download pdf (Page 45)

NETGEAR genie ADVANCED Home

N150 Wireless ADSL2+ Modem Router DGN1000v3

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 modem 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 modem router discards incoming traffic from the Internet that is not a response to one of

your local computers or a service that you have set up on the Port Forwarding / Port

riggering screen. Instead of discarding this traf

fic, you can have the modem router forward

the traffic to one computer on your network. This computer is called the default DMZ server.

 To set up a default DMZ server:

1. Select ADVANCED > Setup > W

AN Setup.

The WAN Setup screen displays.

2. Select the Default DMZ Server check box.

3. T

ype the IP address.

4. Click the Apply

button.

Your settings are saved.

Change the MTU Size

The maximum transmission unit (MTU) is the largest data packet a network device transmits.

When one network device communicates across the Internet with another, the data packets

travel through many devices along the way. If a device in the data path has a lower MTU

setting than the other devices, the data packets are split or “fragmented” to accommodate the

device with the smallest MTU.

The best MTU setting for NETGEAR equipment is often just the default value. In some

situations, changing the value fixes one problem but causes another

. Leave the MTU

unchanged unless one of these situations occurs:

• You have problems connecting to your ISP or other Internet service, and the technical

support of either the ISP or NETGEAR recommends changing the MTU setting.

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Netgear DGN1000v3 User Manual Page 45