NETGEAR DGN3500-100NAS user manual Setting Up a Default DMZ Server, MTU Size on

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RangeMax Wireless-N DSL Gigabit Modem Router DGN3500 User Manual

Table 5-1. WAN Setup Settings

Setting

Description

 

 

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 is rarely required, and should not be done

 

unless you are sure it is necessary for your ISP connection. See “Changing

 

the MTU Size” on page 7-6.

 

 

Disable SIP ALG

The Session Initiation Protocol (SIP) Application Level Gateway (ALG) is

 

enabled by default to optimize VoIP phone calls that use the SIP. The Disable

 

SIP ALG check box allows you to disable the SIP ALG. Disabling the SIP ALG

 

might be useful when running certain applications.

 

 

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.

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 http://192.168.0.1 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.

2.In the main menu, under Advanced, click WAN Setup to display the following screen.

3.On the WAN Setup screen, select the Default DMZ Server check box.

4.Type the IP address for that server.

5.Click Apply to save your changes.

Advanced Configuration

5-3

v1.0, November 2009

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Contents NETGEAR, Inc RangeMax Wireless-N DSL Gigabit Modem RouterStatement of Conditions TrademarksEuropean Union Statement of Compliance 1999/5/EG Bestätigung des Herstellers/ImporteursWorld Wide Web Certificate of the Manufacturer/ImporterVoluntary Control Council for Interference Vcci Statement Customer SupportContents Chapter Protecting Your Network Chapter USB Storage Appendix a Technical Specifications Conventions, Formats, and Scope About This ManualRevision History How to Print This ManualUsing the Setup Manual Connecting Your Router to the InternetLogging In to Your Wireless Modem Router V1.0, November Viewing or Manually Configuring Your ISP Settings Using the Setup WizardISP does not require login Settings Description Basic Settings screen fieldsWant to use Get Automatically from ISP. Your ISP uses Dhcp toConfiguring Adsl Settings Planning Your Wireless Network Chapter Configuring Your Wireless Network Security SettingsSee Manually Configuring Your Wireless Security on Wireless Placement and Range GuidelinesWireless Security Options Manually Configuring Your Wireless Settings NETGEAR4 Wireless SettingsSsid WPA-802.1x Manually Configuring Your Wireless SecurityRestricting Wireless Access to Your Network Turning off wireless connectivity completely V1.0, November Configuring Mixed WPA-PSK+WPA2-PSK Security Configuring WEP Bit WEP Configuring WPA-802.1xUsing Push N Connect WPS to Configure Your Wireless Network Using a WPS Button to Add a WPS Client Using PIN Entry to Add a WPS Client V1.0, November Adding Both WPS and Non-WPS Clients Adding More WPS ClientsConfiguring Advanced WPS Settings V1.0, November Chapter Protecting Your Network Protecting Access to Your Wireless Modem RouterHow to Change the Built-In Password Changing the Administrator Login Time-out Viewing Logs of Web Access or Attempted Web AccessField Description Blocking SitesLog Entry Descriptions V1.0, November Firewall Rules Inbound Rules Port Forwarding Inbound Rule Example a Local Public Web Server Inbound Rule Example Allowing Video conferencing Considerations for Inbound Rules Outbound Rules Service BlockingV1.0, November Order of Precedence for Rules Services V1.0, November Setting Your Time Zone Setting Times and Scheduling Firewall ServicesScheduling Firewall Services Select the Turn E-mail Notification On check box Configuring E-mail Alerts and Web Access Log NotificationsV1.0, November Upgrading the Firmware Chapter Managing Your NetworkManually Checking for Firmware Upgrades V1.0, November Viewing Wireless Modem Router Status Information Explains Router Status screen fields Wireless Modem Router Status FieldsConnection Status Statistics Connection Status SettingsWireless Modem Router Statistics Viewing a List of Attached Devices Backing Up and Restoring the Configuration Managing the Configuration FileErasing the Configuration Enabling Remote Management Access Select the Turn Remote Management On check box WAN Setup Chapter Advanced ConfigurationSetting Description WAN Setup SettingsMTU Size on Setting Up a Default DMZ ServerV1.0, November LAN Setup LAN Setup fields are explained in the following tableAddress Reservation Using the Wireless Modem Router as a Dhcp ServerConfiguring LAN Setup V1.0, November LAN Setup fields are explained in the following table Using the Wireless Modem Router as a Dhcp Server Dynamic DNS Service Select the Use a Dynamic DNS Service check box Static Route Example Setting up Static RoutesConfiguring Static Routes Configuring Universal Plug and Play V1.0, November Building Wireless Bridging and Repeating Networks Configuring a Point-to-Point Bridge Configuration Configuring a Repeater with Wireless Client Association Internet Wireless PC 192.168.0.1 V1.0, November Chapter USB Storage Bus Speed/Second USB Drive RequirementsFile Sharing Scenarios Sharing Large Files with Colleagues Sharing Photos with Friends and FamilyStoring Files in a Central Location for Printing USB Storage Basic Settings Fields and Buttons Description USB Storage Basic Settings\\readyshare \\readyshare\USBStorageSafely Remove USB Device button Editing a Network Folder Fields Description Configuring USB Storage Advanced SettingsUSB Storage Advanced Settings Http Creating a Network Folder Unmounting a USB DriveSelect the Allow only approved devices check box Specifying Approved USB DevicesLocating the Internet Port IP Address Connecting to the USB Drive from a Remote ComputerConnecting to the USB Drive with Microsoft Network Settings Accessing the Router’s USB Drive Remotely Using FTPEnabling File and Printer Sharing Configuring Windows 98SE and Windows MEBasic Functioning Chapter TroubleshootingPower LED Is Red Power LED Is Not OnWindow Appears Asking You to Reload Firmware Cannot Log in to the Wireless Modem RouterLAN or Adsl Port LED Is Not On Adsl Link Troubleshooting the ISP ConnectionAdsl Link LED Is Blinking Amber Internet LED is RedObtaining an Internet IP Address Troubleshooting PPPoE or PPPoAResolving a ‘Reload Firmware’ Message Troubleshooting Internet BrowsingTesting the LAN Path to Your Router Troubleshooting a TCP/IP Network Using the Ping UtilityPing -n 10 IP address Testing the Path from Your Computer to a Remote DeviceProblems with Date and Time Restoring the Default Configuration and PasswordGeneral Specifications Appendix a Technical SpecificationsInternet Connection Factory Default ConfigurationSpecification Description Interface Specifications Feature Default Behavior LoginFirewall Feature Default BehaviorWireless Document Link Appendix B Related DocumentsNumerics IndexIndex-2 Index-3