•MTU Size (in bytes). The normal MTU (maximum transmit unit) value for most Ethernet networks is 1500
bytes, or 1492 bytes for PPPoE connections. Change the MTU only if you are sure that it is necessary for
your ISP connection. See Change the MTU Size on page 41.
•NAT Filtering. Network Address Translation (NAT) determines how the router processes inbound traffic.
Secured NAT protects computers on the LAN from attacks from the Internet but might prevent some Internet
games, point-to-point applications, or multimedia applications from working. Open NAT provides a much
less secured firewall but allows almost all Internet applications to work.
6. Click the Apply button.
Your settings 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 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.
The router usually detects and discards incoming traffic from the Internet that is not a response to one of your local
computers or a service that you configured on the Port Forwarding/Port Triggering page. Instead of discarding this
traffic, you can specify that the router forwards the traffic to one computer on your network. This computer is called
the default DMZ server.
To set up a default DMZ server:
1. Launch a web browser from a computer or WiFi device that is connected to the network.
2. Enter http://www.routerlogin.net.
A login window opens.
3. Enter the router user name and password.
The user name is admin. The default password is password. The user name and password are case-sensitive.
The BASIC Home page displays.
4. Select ADVANCED > Setup > WAN Setup.
The WAN Setup page displays.