Netgear DGN1000v3 User Manual download pdf (Page 44)

NETGEAR genie ADVANCED Home

N150 Wireless ADSL2+ Modem Router DGN1000v3

firewall security less effective. For more information, see the following section, Default

DMZ Server.

• Respond to Ping on Internet Port. If you want the modem router to respond to a

ping from the Internet, select this check box. Use this feature 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.

• Disable IGMP Proxying. IGMP proxying allows computers on the LAN to receive the

multicast traf

fic they are subscribed to from the Internet. By default, this check box is

selected, and the IGMP proxy is disabled, preventing multicast traf

fic from the Internet

to the LAN. Clear the Disable IGMP Proxying check box to allow multicast traffic

from the Internet to the LAN.

• 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. Reduce the MTU only if you are sure that it

is necessary for your ISP connection. For more information, see

Change the MTU

Size on page 45.

• NAT Filtering. Network

Address Translation (NAT) determines how the modem router

processes inbound traffic:

- Secured NAT. Provides a secured firewall to protect the computers on the LAN

from attacks from the Internet, but might prevent some Internet games,

point-to-point applications, or multimedia applications from functioning. By default,

the Secured radio button is selected.

Open NA

T. Provides a much less secured firewall, but allows almost all Internet

applications to function.

• 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. Select the

Disable SIP ALG check box to disable the SIP ALG. Disabling the SIP ALG might be

useful when you are running certain applications.

• VPN Passthrough. When the modem router has Network

Address

Translation (NAT)

enabled, it filters encrypted tunnel packets through NAT, causing these packets to

become invalid. VPN pass-through allows encrypted tunnel packets to go through

without being filtered, and is enabled by default for IPSec, PPTP, and L2TP packets.

Do not disable VPN pass-through for IPSec, PPTP, or L2TP unless you have a

specific reason.

3. Click the Apply button.

Your settings are saved.

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Netgear DGN1000v3 User Manual Page 44

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