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Automatic Firmware Recovery Should the firmware become corrupted, the modem router automatically detects this situation and opens the following screen to enable you to recover the firmware. Figure 4-12 Managing Your Network v1.0, July 2008 Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual To recover the firmware: 1. If you already have the firmware file on your PC, go directly to step 2. If you do not have the firmware file on your PC, obtain the firmware from the NETGEAR support site at 2. Click Browse. 3. Navigate to the firmware file. (If you used the Setup CD, recovery firmware is located in the C:\Netgear directory.) 4. Click Upgrade. 5. The recovery process takes about 5 minutes. Wait for the progress bar to complete. After the firmware recovery is complete, the login screen for the Smart Wizard displays, allowing you to log in to the modem router to check its status. Managing Your Network v1.0, July 2008 Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual Managing Your Network v1.0, July 2008 Chapter 5 Advanced Configuration This chapter describes how to configure the advanced features of your DGN2000 Wireless-N ADSL2+ Modem Router. Configuring Advanced Security The modem router provides a variety of advanced features, which are described in the following sections: • “Setting Up a Default DMZ Server” on page 5-2” • “Connecting Automatically, as Required” on page 5-3” • “Disabling Port Scan and DOS Protection” on page 5-3” • “Responding to a Ping on an Internet WAN Port” on page 5-4” • “Setting the MTU Size” on page 5-4” • “Disabling the SIP ALG” on page 5-4” • “Configuring LAN IP Settings” on page 5-4” • “Configuring DHCP” on page 5-6” • “Configuring LAN TCP/IP Settings” on page 5-8” • “Configuring Dynamic DNS” on page 5-9” • “Using Static Routes” on page 5-10” • “How to Configure Universal Plug and Play” on page 5-13” • “Building Wireless Bridging and Repeating Networks” on page 5-14” • “Displaying and Configuring Advanced WPS Settings” on page 5-20” These features are discussed in the following sections. v1.0, July 2008 Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual Setting Up a Default DMZ Server The default demilitarized zone (DMZ) server feature is helpful when you use some online games and videoconferencing applications that are incompatible with NAT. The modem router is programmed to recognize some of these applications and to work correctly with them, but there are other applications that 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. Note: For security reasons, you should avoid using the default DMZ server feature. When a computer is designated as the default DMZ server, it loses much of the protection of the firewall, and is exposed to many exploits from the Internet. If compromised, the computer can be used to attack your network. Incoming traffic from the Internet is usually discarded by the modem router unless the traffic is a response to one of your local computers or a service that you have configured in the Ports screen. Instead of discarding this traffic, you can have it forwarded to one computer on your network. This computer is called the default DMZ server. How to Configure a Default DMZ Server To assign a computer or server to be a default DMZ server: 1. Log in to the modem router at its default LAN address of with its default user name of admin and default password of password, or using whatever user name, password, and LAN address you have chosen for the modem router. Advanced Configuration v1.0, July 2008 Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual 2. In the main menu, under Advanced, click WAN Setup to display the following screen. Figure 5-1 3. Select the Default DMZ Server check box. 4. Type the IP address for that server. 5. Click Apply to save your changes. Other WAN Options The WAN Setup screen that is shown in Figure 5-1 also allows you perform the following tasks: • Connecting Automatically, as Required Usually, this option should be enabled, so that an Internet connection is made automatically, whenever Internet-bound traffic is detected. If this causes high connection costs, you can disable this setting. If this setting is disabled, you must connect manually, using the screen that you access by clicking the Connection Status button on the Status screen. If you have an Always on connection, this setting has no effect. • Disabling Port Scan and DOS Protection Advanced Configuration v1.0, July 2008 Wireless-N ADSL2+ Modem Router DGN2000 Reference Manual The firewall protects your LAN against port scans and denial of service (DOS) attacks. This protection should be disabled only in special circumstances. • Responding to a Ping on an Internet WAN Port If you want the modem router to respond to a ping from the Internet, select the Respond to Ping on Internet WAN Port check box. Th...