USER GUIDE Wireless-N Home Router Model: WRT120N
About This Guide About This Guide Icon Descriptions While reading through the User Guide you may see various icons that call attention to specific items. Below is a description of these icons: NOTE: This check mark indicates that there is a note of interest and is something that you should pay special attention to while using the product. WARNING: This exclamation point indicates that there is a caution or warning and it is something that could damage your property or product.
Table of Contents Chapter 1: Product Overview 1 Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Chapter 2: Wireless Security Checklist 3 General Network Security Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Additional Security Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Warranty Information 31 Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 Exclusions and Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 Obtaining Warranty Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Overview Chapter 1 Chapter 1: Product Overview Thank you for choosing the Linksys by Cisco Wireless-N Home Router. The Router lets you access the Internet via a wireless connection or through one of its four switched ports. You can also use the Router to share resources such as computers, printers and files. A variety of security features help to protect your data and your privacy while you are online.
Product Overview Chapter 1 Wall-Mounting Placement The Router has two wall-mount slots on its bottom panel. The distance between the slots is 152 mm (6 inches). Two screws are needed to mount the Router. 4-5 mm 1-1.5 mm 2.5-3.0 mm Suggested Mounting Hardware †Note: Mounting hardware illustrations are not true to scale. NOTE: Linksys is not responsible for damages incurred by insecure wall-mounting hardware. Follow these instructions: 1. Determine where you want to mount the Router.
Wireless Security Checklist Chapter 2 Chapter 2: Wireless Security Checklist Wireless networks are convenient and easy to install, so homes with high-speed Internet access are adopting them at a rapid pace. Because wireless networking operates by sending information over radio waves, it can be more vulnerable to intruders than a traditional wired network. Like signals from your cellular or cordless phones, signals from your wireless network can also be intercepted.
Advanced Configuration Chapter 3 Chapter 3: Advanced Configuration After setting up the Router with the Setup Wizard (located on the CD-ROM), the Router will be ready for use. However, if you want to change its advanced settings, use the Router’s browser-based utility. This chapter describes each web page of the utility and each page’s key functions. You can access the utility via a web browser on a computer connected to the Router.
Advanced Configuration Chapter 3 Automatic Configuration - DHCP By default, the Router’s Internet Connection Type is set to Automatic configuration - DHCP, which should be kept only if your ISP supports DHCP or you are connecting through a dynamic IP address. (This option usually applies to cable connections.) Internet Connection Type > Automatic Configuration - DHCP Static IP If you are required to use a permanent IP address to connect to the Internet, select Static IP.
Advanced Configuration Chapter 3 s DNS 1-3 Your ISP will provide you with at least one DNS (Domain Name System) server IP address. PPTP Server IP Address Your ISP will provide you with the IP address of the PPTP server. Username and Password Enter the Username and Password provided by your ISP. Connect on Demand: Max Idle Time You can configure the Router to cut the Internet connection after it has been inactive for a specified period of time (Max Idle Time).
Advanced Configuration Chapter 3 Host Name and Domain Name These fields allow you to supply a host and domain name for the Router. Some ISPs, usually cable ISPs, require these names as identification. You may have to check with your ISP to see if your broadband Internet service has been configured with a host and domain name. In most cases, leaving these fields blank will work. DHCP Server DHCP is enabled by factory default.
Advanced Configuration Chapter 3 addresses to. This number cannot be greater than 253. The default is 50. The features available on the DDNS screen will vary, depending on which DDNS service provider you use. IP Address Range Displayed here is the range of available IP addresses. DynDNS.org Client Lease Time The Client Lease Time is the amount of time a network user will be allowed connection to the Router with their current dynamic IP address.
Advanced Configuration Chapter 3 Click Save Settings to apply your changes, or click Cancel Changes to clear your changes. TZO.com Setup > Advanced Routing This screen is used to set up the Router’s advanced functions. Operating Mode allows you to select the type(s) of advanced functions you use. Dynamic Routing automatically adjusts how packets travel on your network. Static Routing sets up a fixed route to another network destination.
Advanced Configuration Chapter 3 Route Entries To set up a static route between the Router and another network, select a number from the dropdown list. Click Delete This Entry to delete a static route. Enter Route Name Enter a name for the Route here, using a maximum of 25 alphanumeric characters. Destination LAN IP The Destination LAN IP is the address of the remote network or host to which you want to assign a static route.
Advanced Configuration Chapter 3 Wireless-N channel. Select any channel from the dropdown menu. If you are not sure which channel to select, keep the default, Auto. Standard Channel If 20MHz only is the Channel Width setting, then select the appropriate channel for your wireless network. If you are not sure which channel to select, then keep the default, Auto. If 40MHz only is the Channel Width setting, then the Standard Channel will be a secondary channel for Wireless-N (2.4 GHz).
Advanced Configuration Chapter 3 Method #3 Use this method if your client device asks for the Router’s PIN number. 1. Enter the PIN number listed on this screen. (It is also listed on the label on the bottom of the Router.) WPA Personal NOTE: If you are using WPA, then each device in your wireless network MUST use the same WPA method and shared key, or else the network will not function properly. 2. After the client device has been configured, click OK.
Advanced Configuration Chapter 3 WPA Enterprise This option features WPA used with a RADIUS server. (This should only be used when a RADIUS server is connected to the Router.) Shared Secret Enter the key shared between the Router and the server. Key Renewal Enter a Key Renewal period, which instructs the Router how often it should change the encryption keys. The default is 3600 seconds. RADIUS This option features WEP used with a RADIUS server.
Advanced Configuration Chapter 3 WEP Wireless > Wireless MAC Filter WEP is a basic encryption method, which is not as secure as WPA. Wireless access can be filtered by using the MAC addresses of the wireless devices transmitting within your network’s radius. IMPORTANT: If you are using WEP encryption, then each device in your wireless network MUST use the same WEP encryption method and key, or else the network will not function properly.
Advanced Configuration Chapter 3 Advanced Wireless AP Isolation This option isolates all wireless clients and wireless devices on your network from each other. Wireless devices will be able to communicate with the Router but not with each other. To use this option, select Enable. AP Isolation is disabled by default. Wireless Client List Wireless Client List This screen shows computers and other devices on the wireless network. The list can be sorted by Client Name, IP Address, MAC Address, and Status.
Advanced Configuration Chapter 3 Wireless-G devices are experiencing severe problems and are not able to transmit to the Router in an environment with heavy 802.11b traffic. This option boosts the Router’s ability to catch all Wireless-N and Wireless-G transmissions but severely decreases performance. To use this option, keep the default, Auto. To disable this option, select Disabled. Beacon Interval Enter a value between 1 and 65,535 milliseconds.
Advanced Configuration Chapter 3 this option to enable Java filtering. This option is disabled by default. ActiveX ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not having access to Internet sites created using this programming language. Select this option to enable ActiveX filtering. This option is disabled by default.
Advanced Configuration Chapter 3 Summary Status Policies are disabled by default. To enable a policy, select the policy number from the drop-down menu, and select Enabled. To create a policy, follow steps 1-11. Repeat these steps to create additional policies, one at a time. 1. Select a number from the Access Policy drop-down menu. 2. Enter a Policy Name in the field provided. 3. To enable this policy, select Enabled. 4. Click Edit List to select which computers will be affected by the policy.
Chapter 3 To delete a service, select it from the Application list. Then click Delete. 11. Click Save Settings to save the policy’s settings, or click Cancel Changes to clear the changes. Applications and Gaming > Single Port Forwarding The Single Port Forwarding screen allows you to customize port services for common applications on this screen. When users send these types of requests to your network via the Internet, the Router will forward those requests to the appropriate servers (computers).
Advanced Configuration Chapter 3 Start~End Port Enter the number or range of port(s) used by the server or Internet applications. Check with the Internet application documentation for more information. Forwarded Range For each application, enter the starting and ending port numbers of the forwarded port number range. Check with the Internet application documentation for the port number(s) needed. Protocol Select the protocol(s) used for this application, TCP, UDP, or Both.
Advanced Configuration Chapter 3 by MAC address, select MAC Address and enter the MAC address in the field provided. To retrieve this information, click DHCP Client Table. WMM Support If you have other devices that support Wi-Fi Multimedia (WMM) on your network, keep the default, Enabled. Otherwise, select Disabled. No Acknowledgement If you want to disable the Router’s Acknowledgement feature, so the Router will not re-send data if an error occurs, then select Enabled.
Advanced Configuration Chapter 3 Port Range Enter the port range that the application will be using. For example, if you want to allocate bandwidth for FTP, you can enter 21-21. If you need services for an application that uses from 1000 to 1250, you enter 10001250 as your settings. You can have up to three ranges to define for this bandwidth allocation. Port numbers can range from 1 to 65535. Check your application’s documentation for details on the service ports used.
Advanced Configuration Chapter 3 Priority This column displays the bandwidth priority of High, Medium, Normal, or Low. Name This column displays the application, device, or port name. Information This column displays the port range or MAC address entered for your entry. If a pre-configured application or game was selected, there will be no valid entry shown in this section. Remove Click this button to remove an entry. Edit Click this button to make changes.
Advanced Configuration Chapter 3 UPnP Universal Plug and Play (UPnP) allows the appropriate Windows operating system to automatically configure the Router for various Internet applications, such as gaming and videoconferencing. UPnP To use UPnP, keep the default, Enabled. Otherwise, select Disabled. Allow Users to Configure Keep the default, Enabled, if you want to be able to make manual changes to the Router while using the UPnP feature. Otherwise, select Disabled.
Advanced Configuration Chapter 3 Diagnostics Administration > Factory Defaults Ping Test Restore the Router to its factory default settings. Ping checks the status of a connection. IP or URL Address Enter the address of the computer whose connection you wish to test. Packet Size Enter the packet size you want to use. The default is 32 bytes. Number to Ping Enter the number of times you wish to test the connection. The default is 5. Start to Ping To run the test, click this button.
Advanced Configuration Chapter 3 Firmware Upgrade Before upgrading the firmware, download the Router’s firmware upgrade file from the Linksys website, www.linksysbycisco.com. Please select a file to upgrade To select the firmware upgrade file, click Browse and follow the on-screen instructions. Start to Upgrade After you have selected the appropriate file, click this button, and follow the on-screen instructions.
Advanced Configuration Chapter 3 Security The wireless security method used by the Router is displayed. SSID Broadcast The status of the SSID Broadcast feature is displayed. DHCP Clients Table DHCP Client Table The DHCP Client Table lists computers and other devices that have been assigned IP addresses by the Router. The list can be sorted by IP Address, MAC Address, Interface, and Client Name. To remove a DHCP client, click Delete. To update the on-screen information, click Refresh.
Troubleshooting Appendix A Appendix A: Troubleshooting Your computer cannot connect to the Internet. Follow these instructions until your computer can connect to the Internet: s Make sure that the Router is powered on. The Power LED should be lit and not flashing. s If the Power LED is flashing, then power off all of your network devices, including the modem, Router, and computers. Then power on each device in the following order: s 4. Click OK.
Appendix A Wireless-N Home Router Troubleshooting 29
Specifications Appendix B Appendix B: Specifications Model WRT120N Standards IEEE 802.3u, 802.11g, 802.11b, Draft 802.11n LEDs Power, Internet, Wireless, Wi-Fi Protected Setup™, Ethernet (1-4) Ports Internet, Ethernet (1-4), Power Buttons Reset, Wi-Fi Protected Setup™ Cabling Type Cat 5 # of Antennas 2 (internal) Detachable (y/n) No Modulations 802.11b: CCK/QPSK, BPSK 802.11g: OFDM/BPSK, QPSK, 16-QAM, 64-QAM 802.
