Netgear PR2000 User Manual download pdf (Page 51)

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Trek N300 Travel Router and Range Extender PR2000

• Respond to Ping on Internet Port. If you want the Trek to respond to a ping from the

Internet, select this check box. By default, this check box is cleared. Use this feature

only as a diagnostic tool because it allows your Trek to be discovered. Do not select

this check box unless you have a specific reason.

• 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. This change is rarely required. Do not make

this change unless you are sure that it is necessary for your ISP connection. For more

information, see

Change the MTU Size on page 53.

• NAT Filtering. Network Address Translation (NAT) determines how the Trek

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 Trek. 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 Trek 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.

7. 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 Trek 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.

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Netgear PR2000 User Manual Page 51

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