Default Dmz Server; Change The Mtu Size - NETGEAR CG3300CMR 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 gateway is programmed to recognize some of these applications and to work
correctly with them, but there are other applications that do not function well. In some cases,
one local computer can run the application correctly if the IP address of that computer is
entered as the default DMZ server.
WARNING:
DMZ servers pose a security risk. A computer that is 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 gateway 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 it forwarded 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 are split (or "fragmented") to accommodate
the device that has the smallest MTU.
The best MTU setting for NETGEAR equipment is often the default value, and changing the
value often fixes one problem but causes another. Leave MTU size 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 often 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 DSL service
-
Wireless Cable Gateway CG3300CMR
genie Advanced Home
27