NETGEAR WNDR4500 user manual How Port Forwarding Differs from Port Triggering

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N900 Wireless Dual Band Gigabit Router WNDR4500

Internet to initiate a connection to a server computer on your network. Normally, your router ignores any inbound traffic that is not a response to your own outbound traffic. You can configure exceptions to this default rule by using the port forwarding feature.

A typical application of port forwarding can be shown by reversing the client-server relationship from the previous web server example. In this case, a remote computer’s browser needs to access a web server running on a computer in your local network. Using port forwarding, you can tell the router, “When you receive incoming traffic on port 80 (the standard port number for a web server process), forward it to the local computer at 192.168.1.123.” The following sequence shows the effects of the port forwarding rule you have defined:

1.The user of a remote computer opens a browser and requests a web page from www.example.com, which resolves to the public IP address of your router. The remote computer composes a web page request message with the following destination information:

Destination address. The IP address of www.example.com, which is the address of your router.

Destination port number. 80, which is the standard port number for a web server process.

The remote computer then sends this request message through the Internet to your router.

2.Your router receives the request message and looks in its rules table for any rules covering the disposition of incoming port 80 traffic. Your port forwarding rule specifies that incoming port 80 traffic should be forwarded to local IP address 192.168.1.123. Therefore, your router modifies the destination information in the request message:

The destination address is replaced with 192.168.1.123.

Your router then sends this request message to your local network.

3.Your web server at 192.168.1.123 receives the request and composes a return message with the requested web page data. Your web server then sends this reply message to your router.

4.Your router performs Network Address Translation (NAT) on the source IP address, and sends this request message through the Internet to the remote computer, which displays the web page from www.example.com.

To configure port forwarding, you need to know which inbound ports the application needs. You usually can determine this information by contacting the publisher of the application or the relevant user groups and newsgroups.

How Port Forwarding Differs from Port Triggering

The following points summarize the differences between port forwarding and port triggering:

•Port triggering can be used by any computer on your network, although only one computer can use it at a time.

•Port forwarding is configured for a single computer on your network.

Advanced Settings

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Contents October 2013 East Plumeria Drive San Jose, CA N900 Wireless Dual Band Gigabit Router WNDR4500Support Contents USB Storage Advanced Settings Appendix a Supplemental Information Getting to know your router Hardware SetupPosition Your Router Unpack Your RouterFront Panel Hardware FeaturesLED Label Back PanelGetting Started with Netgear Genie Connecting to the routerUse Standard TCP/IP Properties for Dhcp Router Setup PreparationTypes of Logins and Access Wireless Devices and Security SettingsBrowse to http//routerlogin.net Netgear genie Setup To use Netgear genie to set up your router Upgrade Router Firmware Use Netgear genie after InstallationRouter Dashboard Basic Home Screen Manual Method Add Wireless Devices or Computers to Your NetworkWi-Fi Protected Setup WPS Method  To use WPS to join the wireless networkYour Internet connection and network Netgear genie Basic SettingsDoes Your ISP Require a Login? Answer either yes or no Internet SetupInternet Setup Screen Fields Internet IP Address Attached Devices ReadySHARE USB Storage Parental Controls To view or change basic wireless settings Basic Wireless SettingsRegion Selection Wireless Settings Screen FieldsChange WPA Security Option and Passphrase Wireless Network GHz b/g/n and 5.0 GHz a/nSecurity Options Settings Guest Networks  To set up a guest networkWPA Encryption Guest Network Wireless Security OptionsNetgear genie Advanced Home Specifying custom settingsSetup Wizard Select either Push Button or PIN Number WPS WizardSelect Advanced WPS Wizard Setup Menu WAN Setup Change the MTU Size Default DMZ Server To set up a default DMZ server Common MTU Sizes  To change the MTU size Select Advanced Setup WAN Setup To change the LAN settings LAN SetupUse Router as a Dhcp Server LAN Setup Screen SettingsLAN TCP/IP Setup Use the Router as a Dhcp Server To reserve an IP address Address ReservationSet Up QoS for Internet Access Quality of Service QoS SetupEnable WMM QoS for Wireless Multimedia Applications  To create a QoS policy for applications and online games QoS for Applications and Online GamingClick the Add Priority Rule button QoS for a Router LAN PortClick Add Priority Rule QoS for a MAC Address To edit or delete a QoS policy Editing or Deleting an Existing QoS PolicyUSB Storage Accessing and configuring a USB storageFile-Sharing Scenarios ReadySHARE AccessUSB Drive Requirements  To share files with your friends and family Sharing PhotosStoring Files in a Central Location for Printing Sharing Large Files over the InternetBasic Settings Add or Edit a Network Folder  To access your USB deviceUSB Storage Advanced Settings Available Network Folders Safely Remove a USB DriveSpecify Approved USB Devices Media Server SettingsSelect the Allow only approved devices check box Ftp//10.1.65.4 Access the Router’s USB Drive Remotely Using FTP To connect to the router’s USB drive using a web browser Connect to the USB Drive from a Remote ComputerReadySHARE Printer ReadySHARE Printer  To set up ReadySHARE PrinterN900 Wireless Dual Band Gigabit Router WNDR4500 N900 Wireless Dual Band Gigabit Router WNDR4500 N900 Wireless Dual Band Gigabit Router WNDR4500 N900 Wireless Dual Band Gigabit Router WNDR4500 USB Control Center Utility USB Printer Control Center Configuration To control a USB speaker Scan with a Multi-Function PrinterUSB Speaker Desktop Netgear genie Security Keeping unwanted content out of your network To specify a trusted computer Keyword Blocking of Http Traffic To delete a keyword or domain  To block services Block Services Port FilteringN900 Wireless Dual Band Gigabit Router WNDR4500  To schedule blocking Schedule BlockingSecurity Event Email Notifications  To set up email notificationsManaging your network AdministrationUpgrade the Router Firmware Hardware Version. The router model Internet Provider WAN SetupView Router Status Router InformationSystem up time and poll interval statistics Statistics ButtonView connection status information Connection Status ButtonWireless Settings 2.4 GHz and 5 GHz Guest Network 2.4 GHz and 5 GHz View Logs of Web Access or Attempted Web AccessN900 Wireless Dual Band Gigabit Router WNDR4500  To restore configuration settings that you backed up Manage the Configuration FileBack Up Settings Restore Configuration SettingsErase Password Recovery Set PasswordTime Machine Set Up Time Machine To set up Time Machine  To access the drive Access the Connected USB Hard DriveTime Machine Before You Back up a Large Amount of Data N900 Wireless Dual Band Gigabit Router WNDR4500 Change the Partition Scheme Select Guid Partition Table or Master Boot Record MBRAdvanced Settings Advanced Wireless Settings Wireless repeating scenario Wireless Repeating Function WDSWireless Repeating Function  To set up the base station Set Up the Base Station To configure the router as a repeater unit Set Up a Repeater UnitPort Forwarding and Triggering Remote Computer Access BasicsDestination port number Port Triggering to Open Incoming PortsPort Forwarding to Permit External Host Communications How Port Forwarding Differs from Port Triggering  To set up port forwarding Set Up Port Forwarding to Local ServersAdd a Custom Service  To edit or delete a port forwarding entry Click Edit Service or Delete ServiceEditing or Deleting a Port Forwarding Entry Application Example Making a Local Web Server PublicUniversal Plug and Play on Set Up Port Triggering100 Dynamic DNS 102 Static Routes  To set up a static route Remote Management Universal Plug and Play USB Settings To turn on Universal Plug and Play IPv6  To set up an IPv6 Internet connection typeTraffic Meter Troubleshooting Sequence to Restart Your Network Wireless SettingsNetwork Settings Quick TipsPower/Test LED Stays Amber Troubleshooting with the LEDsPower/Test LED Is Off or Blinking Push N Connect WPS Button Blinks Amber Wireless LEDs Are OffLEDs Never Turn Off Internet or Ethernet Port LEDs Are OffCannot Log In to the Router Cannot Access the Internet115  To troubleshoot a PPPoE connection Troubleshooting PPPoETroubleshooting Internet Browsing Select Administration Router StatusChanges Not Saved Wireless ConnectivityRestore the Factory Settings and Password Wireless Signal Strength To ping the router from a running Windows PC Troubleshoot Your Network Using the Ping UtilityTest the LAN Path to Your Router Test the Path from Your Computer to a Remote Device Supplemental Information Factory Settings121 WNDR4500 Router specifications Technical Specifications123 Notification of Compliance Netgear Dual Band WirelessIndustry Canada Interference Reduction Table 127 Index128 129 130
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