Respond To Ping On Internet Port; Mtu Size (In Bytes); Nat Filtering - NETGEAR DGND3700 User Manual

N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Incoming traffic from the Internet is usually discarded by the wireless modem router unless
the traffic is a response to one of your local computers or a service that you have configured
in the Ports 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.
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To assign a computer or server to be a default DMZ server:
1. In the WAN Setup screen, select the Default DMZ Server check box.
Figure 48. Default DMZ Server setting
2. Type the IP address for that server and click Apply.

Respond to Ping on Internet Port

If you want the wireless modem router to respond to a ping from the Internet, select this
check box. This should be used only as a diagnostic tool, because it allows your wireless
modem router to be discovered, which can be a security problem. Do not select this check
box unless you have a specific reason to do so.

MTU Size (in bytes)

The normal maximum transmission unit (MTU) value for most Ethernet networks is 1500
bytes, 1492 bytes for PPPoE connections, and 1458 for PPPoA connections. For some ISPs
you might need to reduce the MTU. But this is rarely required, and should not be done unless
you are sure it is necessary for your ISP connection.

NAT Filtering

This option determines how the router deals with inbound traffic. The Secured option
provides a secured firewall to protect the PCs on LAN from attacks from the Internet, but it
might cause some Internet games, point-to-point applications, and multimedia applications
no work. The Open option, on the other hand, provides a much less secured firewall, while it
allows almost all Internet applications to work.
Advanced Settings
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