Netgear DGN2200 DGN2200 User Manual - Page 77

Table 6-1., WAN Settings, Advanced Configuration - nat

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Wireless-N 300 Modem Router DGN2200 User Manual Figure 6-1 Table 6-1. WAN Settings Setting Description Disable SPI Firewall Default DMZ Server Respond to a Ping on an Internet WAN Port MTU Size NAT Filtering The SPI (Stateful Packet Inspection) Firewall protects your LAN against Denial of Service attacks. This should only be disabled in special circumstances See "Setting Up a Default DMZ Server" on page 6-3. If you want the wireless-N modem router to respond to a ping from the Internet, select the Respond to Ping on Internet WAN Port check box. This should be used only as a diagnostic tool, since it allows your wireless-N modem router to be discovered. Do not select this check box unless you have a specific reason to do so. 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. But this is rarely required, and should not be done unless you are sure it is necessary for your ISP connection. 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 may cause some Internet games, point-to-point applications, or multimedia applications not to work. The Open option, on the other hand, provides a much less secured firewall, while it allows almost all Internet applications to work 6-2 Advanced Configuration v1.0, March 2010

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Wireless-N 300 Modem Router DGN2200 User Manual
6-2
Advanced Configuration
v1.0, March 2010
Figure 6-1
Table 6-1.
WAN Settings
Setting
Description
Disable SPI Firewall
The SPI (Stateful Packet Inspection) Firewall protects your LAN against
Denial of Service attacks. This should only be disabled in special
circumstances
Default DMZ Server
See
“Setting Up a Default DMZ Server” on page 6-3
.
Respond to a Ping on an Internet
WAN Port
If you want the wireless-N modem router to respond to a ping from the
Internet, select the
Respond to Ping on Internet WAN Port
check
box. This should be used only as a diagnostic tool, since it allows your
wireless-N modem router to be discovered. Do not select this check
box unless you have a specific reason to do so.
MTU Size
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. 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 may cause some Internet games,
point-to-point applications, or multimedia applications not to work. The
Open option, on the other hand, provides a much less secured firewall,
while it allows almost all Internet applications to work