Genie Advanced Home
37
Dual Band 11ac WiFi Router R6200
The following settings are available:
• Disable Port Scan and DoS Protection. DoS protection protects your LAN against
denial of service attacks such as Syn flood, Smurf Attack, Ping of Death, Teardrop
Attack, UDP Flood, ARP Attack, Spoofing ICMP, Null Scan, and many others. This
should be disabled only in special circumstances.
• Default DMZ Server. This feature is sometimes helpful when you are playing online
games or videoconferencing. Be careful when using this feature because it makes the
firewall security less effective. See the following section, Default DMZ Server, for
more details.
• Respond to Ping on Internet Port. If you want the router to respond to a ping from
the Internet, select this check box. Use this setting only as a diagnostic tool because
it 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. Only reduce the
MTU if you are sure that it is necessary for your ISP connection. See Change the
MTU Size on page 38.
• 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.
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 there are other applications that 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.