Netgear AC750 User Manual download pdf (Page 44)

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A750 Wireless Dual Band Gigabit Router JR6150

- 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 almo

st all Internet

applications to function.

• Disable SIP ALG. Some V

oice over IP (VoIP) applications do not function well with

the Session Initiation Protocol (SIP) Application Layer Gateway (ALG). Selecting the

check box to turn off the SIP ALG might enable connected VoIP devices to create and

accept a VoIP call through the router. By default, this check box is cleared.

• Disable

IGMP

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

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

selected, and the IGMP proxy is disabled, preventing multicast traffic from the Internet

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

from the Internet to the LAN.

• VPN Passthrough.

The router supports VPN passthrough for IPSec, PPTP

, and

L2TP.

- IPSec Passthrough. To enable or disable IPSec passthrough, select the Enable

Disabled radio button.

- PPTP Passthrough. T

o enable or disable PPTP passthrough, select the Enable

or Disabled radio button.

- L2TP Passthrough.

To enable or disable L2TP passthrough, select the Enable or

Disabled radio button.

4. Click the Apply

button.

Default DMZ Server

The default DMZ server feature is helpful when you are using some online games and

videoconferencing applications that are incompatible with Network Address Translation

(NAT). The router is programmed to recognize some of these applications and to work

correctly with them, but other applications might not function well. In some cases, one local

computer can run the application correctly if that computer’s IP address is entered as the

default DMZ server.

WARNING:

DMZ servers pose a security risk. A computer designated as the

default DMZ server loses much of the protection of the firewall and

is exposed to exploits from the Internet. If compromised, the DMZ

server computer can be used to attack other computers on your

network.

Incoming traffic from the Internet gets 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 Port

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Netgear AC750 User Manual Page 44

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