NETGEAR genie Advanced Home
33
R6250 Smart WiFi Router
allows your router to be discovered. Do not select this check box unless you have a
specific reason.
• Disable IGMP Proxying. IGMP proxying allows a computer on the local area network
(LAN) to receive the multicast traffic it is interested in from the Internet. If you do not
need this feature, you can select this check box to disable it.
• MTU Size (in bytes). 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. Reduce the MTU
only if you are sure that it is necessary for your ISP connection. See
Change the MTU
Size on page 34.
• NAT Filtering. Network Address Translation (NAT) determines how the router
processes inbound traffic. Secured NAT provides a secured firewall to protect the
computers on the LAN from attacks from the Internet, but might prevent some Internet
games, point-to-point applications, or multimedia applications from functioning. Open
NAT provides a much less secured firewall, but allows almost all Internet applications
to function.
3. Click Apply.
Your changes are saved.
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 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 router usually detects and discards incoming traffic from the Internet that is not 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 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.
2. Select the Default DMZ Server check box.
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