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NETGEAR genie Advanced Home
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N300 Wireless ADSL2+ Modem Router DGN2200v4
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 recognizes some of these applications and works correctly with
them, but other applications might not function well. In some cases, one local computer can
run the application correctly if that computers 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 modem router discards traffic from the Internet that is not a response to one of your
computers or a service that you have set up in the Port Forwarding/Port Triggering screen.
Instead of discarding this traffic, 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 > WAN Setup. screen.
2. Select the Default DMZ Server check box.
3. Type the IP address.
4. Click Apply.
Your changes 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. These
web-based applications might require an MTU change:
- A secure website that does not open, or displays only part of a web page
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