Reference Manual for the 54 Mbps Wall-Plugged Wireless Range Extender WGX102
8-8 Advanced Configuration of the WGX102
September 2004 202-10042-01
Default DMZ Server. The default DMZ server feature is helpful when using some online games
and videoconferencing applications that are incompatible with NAT. The WGX102 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 WGX102 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.
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.
Respond to Ping on Internet WAN Port. If you want the WGX102 to respond to a 'ping' from
the Internet, select the Respond to Ping on Internet WAN Port check box. This should only be used
as a diagnostic tool, since it allows your range extender to be discovered. Do not select this check
box unless you have a specific reason to do so.
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 range extender that are larger than the configured MTU size are
repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
1. Under MTU Size, enter a new size between 64 and 1500.
2. Click Apply to save the new configuration.
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.
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