Mobile Broadband Wireless-N Router MBRN3000 User Manual
Advanced Configuration
5-6
v1.0, October 2009
The WAN Setup fields are described in the following table:
Setting Up a Default DMZ Server
The default DMZ server feature is helpful when you are using some online games and
videoconferencing applications that are incompatible with NAT. The router is programmed to
recognize some of these applications and to work properly with them, but there are other
applications that may not function well. In some cases, one local computer can run the application
properly if that computer’s IP address is entered as the default DMZ server.
Incoming traffic from the Internet is normally discarded by the 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.
To assign a computer or server to be a default DMZ server:
Table 5-2. WAN Setup Settings
Setting
Description
Disable Port Scan and DOS
Protection
This check box is usually clear so that the firewall protects your LAN
against port scans and denial of service (DOS) attacks. This check box
should be selected only in special circumstances.
Default DMZ Server
This feature is sometimes helpful when you are using some online
games and videoconferencing. Be careful when using this feature
because it makes the firewall security less effective. See
Default DMZ Server” on page 5-6
Respond to Pin on Internet
WAN Port
If you want the router to respond to a ping from the Internet, select this
check box. This should be used only as a diagnostic tool, since it allows
your router to be discovered. Do not select this check box unless you
have a specific reason to do so.
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,
and should not be done unless you are sure it is necessary for your ISP
connection.
Warning:
For security reasons, you should avoid using the default DMZ server feature.
When a computer is designated as the default DMZ server, it loses much of
the protection of the firewall, and is exposed to many exploits from the
Internet. If compromised, the computer can be used to attack your network.
Summary of Contents for MBRN3000
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