Netgear WNR2020 User Manual - Page 26

Set Up a Default DMZ Server, NAT Filtering, Secured, Disable SIP ALG, Disable IGMP Proxying

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Page 26 highlights

N150 and N300 Wireless Routers MTU only if you are sure that it is necessary for your ISP connection. See Change the MTU Size on page 21. • NAT Filtering. Network Address Translation (NAT) determines how the 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 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. 5. Change the settings as needed. 6. Click the Apply button. Your changes are saved. Set Up a 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 the IP address for that computer is entered as the default DMZ server. Networking 26

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Networking
26
N150 and N300 Wireless Routers
MTU only if you are sure that it is necessary for your ISP connection. See
Change the
MTU Size
on page
21.
•
NAT Filtering
. Network Address Translation (NAT) determines how the 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 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.
5.
Change the settings as needed.
6.
Click the
Apply
button.
Your changes are saved.
Set Up a 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 the IP address for that computer is entered as
the default DMZ server.