Set Up A Default Dmz Server - NETGEAR DGND3300v2 User Manual

N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2
Setting
MTU Size (in bytes)
Disable SIP ALG

Set Up a Default DMZ Server

The default DMZ server feature is helpful when using some online games and
videoconferencing applications that are incompatible with Network Address Translation
(NAT). The N300 wireless modem 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.
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.
Incoming traffic from the Internet is usually discarded by the N300 wireless modem router
unless the traffic is a response to one of your local computers or a service that you have
configured in the Port Forwarding 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. In the last Default DMZ Server field, type the last digit of the IP address for that
computer. To remove the default DMZ server, enter 0 (zero).
2. Select the Default DMZ Server check box, and click Apply.
Description
The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is
1500 bytes, or 1492 bytes for PPPoE connections. For some ISPs you might
need to reduce the MTU. This is rarely required, and should not be done unless
you are sure it is necessary for your ISP connection. See
on page 132.
The Session Initiation Protocol (SIP) Application Level Gateway (ALG) is
enabled by default to optimize VoIP phone calls that use the SIP. The Disable
SIP ALG check box allows you to disable the SIP ALG. Disabling the SIP ALG
might be useful when running certain applications.
Advanced Settings (Part 1)
117
Change the MTU Size