Default Dmz Server; Change The Mtu Size - NETGEAR WNDR4500v2 User Manual

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 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.
The router discards incoming traffic from the Internet 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 the router forward traffic to
one computer on your network. This computer is called the default DMZ server.

To set up a default DMZ server:
On the WAN Setup screen, select the Default DMZ Server check box.
1.
Type the IP address.
2.
Click Apply.
3.

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 any device in the data path has a lower MTU
setting than the other devices, the data packets have to be split or "fragmented" to
accommodate the device with the smallest MTU.
The best MTU setting for NETGEAR equipment is often just the default value, and changing
the value might fix one problem but cause another. Leave 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. These
web-based applications might require an MTU change:
A secure website that does not open, or displays only part of a web page
-
Yahoo email
-
MSN portal
-
America Online's DSL service
-
N900 Wireless Dual Band Gigabit Router WNDR4500v2
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