NETGEAR DGN1000 User Manual page 74

Note: 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.
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.

To assign a computer or server to be a default DMZ server:
1. In the WAN screen, select the Default DMZ Server check box.
2. Type the IP address for that server.
3. Fill in the following fields and click Apply:
Respond to Ping on Internet WAN 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. Do not
select this check box unless you have a specific reason to do so.
MTU Size (in bytes). The normal Maximum Transmit Unit (MTU) value for most Ethernet
networks is 1500 bytes, or 1492 bytes for PPPoE 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.
Disabling the SIP ALG. The Session Initiation Protocol (SIP) Application Level Gateway
(ALG) is enabled by default to optimize VoIP phone calls that use the SIP. The Disable
SIP ALG check box allows you to disable the SIP ALG. Disabling the SIP ALG might be
useful when running certain applications.
N150 Wireless ADSL2+ Modem Router DGN1000
Advanced Settings
74