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A750 Wireless Dual Band Gigabit Router JR6150
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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 NAT provides a much less secured firewall, but allows almost all Internet
applications to function.
•
Disable SIP ALG
. Some Voice 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
or
Disabled
radio button.
-
PPTP Passthrough
. To 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
