Netgear DGN2200v3 DGN2200v3 User Manual - Page 78

WAN Setup, Respond to Ping on Internet Port

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N300 Wireless ADSL2+ Modem Router DGN2200v3 WAN Setup Select Advanced > WAN Setup to display the following screen: The following settings are available: • Disable Port Scan and DoS Protection. The firewall protects your LAN against port scans and denial of service (DoS) attacks. This protection should be disabled only in special circumstances. • Default DMZ Server. The default demilitarized zone (DMZ) server feature is helpful when you use online games and video conferencing applications that are incompatible with NAT. See Default DMZ Server on page 79. • Respond to Ping on Internet Port. If you want the 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 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. • NAT Filtering. By default NAT filtering is used. • Disable 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. • Disable IGMP Proxying. The IGPM Proxying feature lets a LAN PC receive the multicast traffic directed to it from the Internet. Selecting this check box prevents this from occuring. Advanced Settings 78

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Advanced Settings
78
N300 Wireless ADSL2+ Modem Router DGN2200v3
WAN Setup
Select
Advanced > WAN Setup
to display the following screen:
The following settings are available:
•
Disable Port Scan and DoS Protection
. The firewall protects your LAN against port
scans and denial of service (DoS) attacks. This protection should be disabled only in
special circumstances.
•
Default DMZ Server
. The default demilitarized zone (DMZ) server feature is helpful when
you use online games and video conferencing applications that are incompatible with
NAT. See
Default DMZ Server
on page
79.
•
Respond to Ping on Internet Port
. If you want the 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 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.
•
NAT Filtering
. By default NAT filtering is used.
•
Disable 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.
•
Disable IGMP Proxying
. The IGPM Proxying feature lets a LAN PC receive the multicast
traffic directed to it from the Internet. Selecting this check box prevents this from occuring.