NETGEAR WGR614v8 - 54 Mbps Wireless Router, Справочное руководство

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54 Mbps Wireless Router WGR614v8 Reference Manual
5-10 Advanced Router Configuration
v1.0, July 2007
Setting Up a Default DMZ Server
The default DMZ server feature is helpful when using some online games and video conferencing
applications that are incompatible with NAT. The router is programmed to recognize some of these
applications and to work properly with them, but there are other applications that may not function
well. In some cases, one local computer can run the application properly if that computer’s IP
address is entered as the default DMZ server.
Incoming traffic from the Internet is normally 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 Ports menu.
Instead of discarding this traffic, you can have it forwarded to one computer on your network. This
computer is called the Default DMZ Server.
The WAN Setup menu, shown below lets you configure a Default DMZ Server.
To assign a computer or server to be a Default DMZ server, follow these steps:
1. Click WAN Setup link on the Advanced section of the main menu.
2. Type the IP address for that server. To remove the default DMZ server, replace the IP address
numbers with all zeros.
3. Click Apply.
Responding to Ping on Internet WAN Port
If you want the router to respond to a 'ping' from the Internet, click the ‘Respond to Ping on
Internet WAN Port’ check box. This should only be used as a diagnostic tool, since it allows your
router to be discovered. Don't check this box unless you have a specific reason to do so.
Setting the MTU Size
The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes,
1492 Bytes for PPPoE connections, or 1436 for PPTP connections. For some ISPs you may need to
reduce the MTU. But this is rarely required, and should not be done unless you are sure it is
necessary for your ISP connection.
Any packets sent through the router that are larger than the configured MTU size will be
repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
Note: 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 can be used to attack your network.