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Linksys RT042 User Manual

Broadband router with qos
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®
A Division of Cisco Systems, Inc.

Broadband Router

with QoS

User Guide

WIRED
RT042
Model No.

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Summary of Contents for Linksys RT042

  • Page 1: Broadband Router

    ® A Division of Cisco Systems, Inc. Broadband Router with QoS User Guide WIRED RT042 Model No.
  • Page 2 Broadband Router Copyright and Trademarks Linksys is a registered trademark or trademark of Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other countries. Copyright © 2005 Cisco Systems, Inc. All rights reserved. WARNING: This product contains chemicals, including lead, known to the State of California to cause cancer, and birth defects or other reproductive harm.

  • Page 3: Table Of Contents

    Broadband Router Table of Contents Chapter 1: Introduction Welcome What’s in this Guide? Chapter 2: Networking Basics An Introduction to LANs The Use of IP Addresses Chapter 3: Getting to Know the Broadband Router The Front Panel The Back and Side Panels Chapter 4: Connecting the Broadband Router Overview Connection Instructions...
  • Page 4 Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter Windows 98 or Me Instructions Windows 2000 or XP Instructions For the Router’s Web-based Utility Appendix D: Using the RT042 Utility Starting the Utility Router Information Usage Configuration Screens Appendix E: The Setup Wizard...
  • Page 5 Broadband Router List of Figures Figure 3-1: Front Panel Figure 3-2: Back Panel Figure 4-1: Example of a Typical Network Figure 4-2: Connect a PC Figure 4-3: Connect the Internet Figure 4-4: Connect the Power Figure 5-1: Entering the Router’s IP Address Figure 5-2: Accessing the Web-Based Utility Figure 5-3: The Site Map Button Figure 5-4: Site Map...
  • Page 6 Broadband Router Figure 5-22: Service Management Figure 5-23: Advanced Setup Tab - UPnP Figure 5-24: Advanced Setup Tab - DDNS Figure 5-25: Advanced Setup Tab - Advanced Routing Figure 5-26: Advanced Setup Tab - VPN Pass Through Figure 5-27: Advanced Setup Tab - Remote Management Figure 5-28: Advanced Setup Tab - System Management Figure 5-29: Log Tab - System Log Figure 5-30: Log Tab - System Statistics...

  • Page 7: Chapter 1: Introduction

    Chapter 1: Introduction Welcome Thank you for choosing the Broadband Router. The Linksys Broadband Router with QoS is a kind of "splitter" for your Internet connection. Just connect your DSL or Cable Modem to the Router, and all the computers in your home or office can share the Internet at the same time.

  • Page 8: What's In This Guide

    This appendix describes how to find the MAC address for your computer’s Ethernet adapter so you can use the Router’s MAC address cloning feature. • Appendix D: Using the RT042 Utility This appendix describes the Router Utility that comes on the Router’s CD.
  • Page 9 • Appendix J: Regulatory Information This appendix supplies the regulatory information regarding the Router. • Appendix K: Contact Information This appendix provides contact information for a variety of Linksys resources, including Technical Support. Chapter 1: Introduction What’s in this Guide?

  • Page 10: Chapter 2: Networking Basics

    Broadband Router Chapter 2: Networking Basics An Introduction to LANs A Router is a network device that connects two networks together. The Router connects your local area network (LAN), or the group of PCs in your home or office, to the Internet. The Router processes and regulates the data that travels between these two networks.
  • Page 11 Broadband Router A DHCP server can either be a designated PC on the network or another network device, such as the Router. By default, the Router’s Internet Connection Type is Obtain an IP automatically (DHCP). The PC or network device obtaining an IP address is called the DHCP client. DHCP frees you from having to assign IP addresses manually every time a new user is added to your network.

  • Page 12: Chapter 3: Getting To Know The Broadband Router

    Broadband Router Chapter 3: Getting to Know the Broadband Router The Front Panel The Router’s LEDs are located on the front panel. Figure 3-1: Front Panel LEDs Ethernet 1-4 Green. The Ethernet LEDs serves two purposes. If an LED is continuously lit, the Router is connected to a device through the corresponding port (1, 2, 3, or 4).

  • Page 13: The Back And Side Panels

    Broadband Router The Back and Side Panels The Router’s ports and Reset button are located on the back panel of the Router. Ethernet Figure 3-2: Back Panel Reset Button Reset Button The Reset button can be used in one of two ways: If the Router is having problems connecting to the Internet, press the Reset button for just a second with a paper clip or a pencil tip.

  • Page 14: Chapter 4: Connecting The Broadband Router

    Broadband Router Chapter 4: Connecting the Broadband Router Overview To set up your network, you will need to do the following: • Connect the Router to one of your PCs according to the instructions in this chapter. • Set up and configure the Router with the setting(s) provided by your Internet Service Provider (ISP) according to “Chapter 5: Setting up and Configuring the Broadband Router.”...

  • Page 15: Connection Instructions

    Broadband Router Connection Instructions 1. Before you begin, make sure that all of your hardware is powered off, including the Router, PCs, hubs, switches, and cable or DSL modem. 2. Connect one end of an Ethernet network cable to one of the Ethernet ports on the back of the Router. Connect the other end to an Ethernet port on a network device, e.g., a PC, print server, hub, or switch.

  • Page 16: Chapter 5: Setting Up And Configuring The Broadband Router

    Broadband Router Chapter 5: Setting Up and Configuring the Broadband Router Overview For your convenience, use the Router’s Web-based Utility to set it up and configure it. This chapter will explain all of the functions in this Utility. There are five main tabs in the Utility: System Summary, Basic Setup, Parental Control, Advanced Setup, and Log. Additional tabs will be available after you click one of the main tabs.
  • Page 17 Broadband Router • Website Hit Rate. This feature allows you to view the frequency at which each of your network’s users are viewing their ten most favorite websites. You can also block these sites, if you wish. • Application Usage. This feature allows you to view which applications, according to user, are taking up the most bandwidth on your network and block those sites if you wish.

  • Page 18: How To Access The Web-Based Utility

    Broadband Router How to Access the Web-based Utility To access the Router’s Web-based Utility, launch Internet Explorer or Netscape Navigator, and enter the Router’s default IP address, 192.168.1.1, in the Address field. Then, press the Enter key. Figure 5-1: Entering the Router’s IP Address A screen will appear asking you for your User name and Password.

  • Page 19: Basic Setup Tab - Network

    Broadband Router User Bandwidth This is a list of all users on your network, displaying how they’re connected and allowing you to set the amount of bandwidth they are allowed and to delete them as users on your network. The headings for this list are: User Name: Shows the name of this user on your network.

  • Page 20: Figure 5-7: Obtain An Ip Automatically

    Broadband Router LAN Setting This shows the Router’s MAC Address, which is a 12-digit code assigned to each piece of hardware for identification. Also listed here are the Router’s IP Address and Subnet Mask. The default value is 192.168.1.1 for IP address and 255.255.255.0 for the Subnet Mask.

  • Page 21: Basic Setup Tab - Password

    Broadband Router PPTP (Point-to-Point Tunneling Protocol) 1. Enter the Specify IP Address, Subnet Mask and Default Gateway Address that is provided by your ISP. 2. Enter your User Name and Password. 3. If you select Connect on Demand option, the connection will be disconnected if it has been idle for a period longer than the Max Idle Time setting.

  • Page 22: Basic Setup Tab - Time

    Broadband Router Basic Setup Tab - Time Time The Router uses the time settings to time stamp log events, to automatically update the Content Filter List, and for other internal purposes. Set the local time using Network Time Protocol (NTP) automatically or manually. Automatic: Select the Time Zone and enter the Daylight Saving and NTP Server.

  • Page 23: Parental Control Tab - On-Line Scheduler

    Broadband Router Parental Control Tab - On-Line Scheduler The Parental Control tab allows you to control and optimize your user’s access to the Internet from your network. This control can also be exercised through the Utility provided on the CD included with the Router. The first screen to appear, On-Line Scheduler, allows you to allow or deny Internet access, according to the schedule, to any of the users on your network.

  • Page 24: Parental Control Tab - Application Usage

    Broadband Router Parental Control Tab - Application Usage From this screen, you can view which applications are taking up the most bandwidth on your network, according to user, and block those sites if you wish. Select User: From this drop-down menu, select the user whose application usage you wish to view. Select Date: From this drop-down menu, select the date when the applications were used.

  • Page 25: Parental Control Tab - Block List

    Broadband Router Click the Add to List button to add the new or newly edited selection to your list of applications. To delete an application, select from the list and click the Delete Selected Application button. Click Save Settings to save the settings or click the Cancel Changes button to undo your changes. If you wish to leave this screen without saving your changes, click the Exit button.

  • Page 26: Advanced Setup Tab - Dmz Host

    Broadband Router Advanced Setup Tab - DMZ Host The DMZ (Demilitarized Zone) Host feature allows one local user to be exposed to the Internet, not protected by the Router’s firewall, to use a special-purpose service such as Internet gaming or video conferencing. Check the Enable DMZ Host box to use this feature.

  • Page 27: Advanced Setup Tab - Upnp

    Broadband Router Port Triggering Some Internet applications or games use alternate ports to communicate between server and LAN host. When you want to use those applications, enter the triggering (outgoing) port and alternate incoming port in this table. The Router will forward the incoming packets to the LAN host. 1.

  • Page 28: Advanced Setup Tab - Ddns

    Broadband Router Advanced Setup Tab - DDNS DDNS (Dynamic DNS) service allows you to assign a fixed domain name to a dynamic Internet IP address. This allows you to host your own Web, FTP or other type of TCP/IP server in your LAN over either of the Internet ports. Before configuring DDNS, you need to visit www.dyndns.org and register a domain name.
  • Page 29 Broadband Router Transmit RIP versions: Choose a protocol for transmitting data on the network. (None, RIPv1, RIPv2-Broadcast, RIPv2-Multicast) Static Routing You will need to configure Static Routing if there are multiple routers installed on your network. The static routing function determines the path that data follows over your network before and after it passes through this Router. You can use static routing to allow different IP domain users to access the Internet.

  • Page 30: Advanced Setup Tab - Vpn Pass Through

    Broadband Router Advanced Setup Tab - VPN Pass Through The VPN Pass Through screen allows you to enable or disable IPSec Pass Through, PPTP Pass Through, and L2TP Pass Through. IPSec Pass Through: Internet Protocol Security (IPSec) is a suite of protocols used to implement secure exchange of packets at the IP layer.

  • Page 31: Advanced Setup Tab - System Management

    The Internet has a service called the Domain Name Service (DNS), which allows users to enter an easily remembered host name, such as www.RT042.com, instead of numerical TCP/IP addresses to access Internet resources. The Router has a DNS lookup tool that will return the numerical TCP/IP address of a host name.
  • Page 32 Firmware Upgrade Right Now button. Firmware Download Users can click the Firmware Download from Linksys Web Site button to link to the downloads on the Support page of the Linksys website. Select the Router from the pull-down menu and choose the firmware from the options.

  • Page 33: Log Tab - System Log

    Broadband Router Log Tab - System Log The System Log screen contains three functions: Syslog, E-mail and Log Setting. Syslog The System Log (of Syslog) function logs network activity with the use of a separate Syslog server. You need a Syslog server for this feature to work.

  • Page 34: Figure 5-30: Log Tab - System Statistics

    Broadband Router Log Setting Alert Log Check the appropriate box when you want receive alert logs for any of the following events: Syn Flooding, IP Spoofing, Win Nuke, Ping of Death and Unauthorized Login Attempt. General Log Check the appropriate box when you want to receive alert logs for any of the following events: System Error Messages, Deny Policies, Allow Policies, Configuration Changes and Authorized Login.

  • Page 35: Appendix A: Troubleshooting

    Appendix A: Troubleshooting This appendix provides solutions to problems that may occur during the installation and operation of the Router. Read the descriptions below to help solve your problems. If you can't find an answer here, check the Linksys website at www.linksys.com.
  • Page 36 Broadband Router For Windows 2000: A. Click Start, Settings, and Control Panel. Double-click Network and Dial-Up Connections. B. Right-click the Local Area Connection that is associated with the Ethernet adapter you are using, and select the Properties option. C. In the Components checked are used by this connection box, highlight Internet Protocol (TCP/IP), and click the Properties button.
  • Page 37 Broadband Router 2. I want to test my Internet connection. A. Check your TCP/IP settings. For Windows 98 and Millennium: Refer to “Appendix F: Windows Help” for details. Make sure Obtain IP address automatically is selected in the settings. For Windows 2000: 1.
  • Page 38 E. In the command prompt, type ping www.linksys.com and press the Enter key. • If you get a reply, the computer is connected to the Internet. If you cannot open a webpage, try the ping command from a different computer to verify that your original computer is not the cause of the problem.
  • Page 39 Your VPN may require port 500/UDP packets to be passed to the computer that is connecting to the IPSec server. Refer to “Problem #7, I need to set up online game hosting or use other Internet applications” for details. Check the Linksys website at www.linksys.com for more information. Appendix A: Troubleshooting Common Problems and Solutions...
  • Page 40 Broadband Router 6. I need to set up a server behind my Router. To use a server like a web, ftp, or mail server, you need to know the respective port numbers they are using. For example, port 80 (HTTP) is used for web; port 21 (FTP) is used for FTP, and port 25 (SMTP outgoing) and port 110 (POP3 incoming) are used for the mail server.
  • Page 41 Broadband Router 7. I need to set up online game hosting or use other Internet applications. If you want to play online games or use Internet applications, most will work without doing any port forwarding or DMZ hosting. There may be cases when you want to host an online game or Internet application.
  • Page 42 Broadband Router 8. I can’t get the Internet game, server, or application to work. If you are having difficulties getting any Internet game, server, or application to function properly, consider exposing one PC to the Internet using DeMilitarized Zone (DMZ) hosting. This option is available when an application requires too many ports or when you are not sure which port services to use.
  • Page 43 12. I need to upgrade the firmware. In order to upgrade the firmware with the latest features, you need to go to the Linksys website and download the latest firmware at www.linksys.com. Follow these steps: A. Go to the Linksys website at http://www.linksys.com and download the latest firmware, or use the Web-based Utility to be automatically redirected to the download webpage.
  • Page 44 Broadband Router 13. My DSL service’s PPPoE is always disconnecting. PPPoE is not actually a dedicated or always-on connection. The DSL ISP can disconnect the service after a period of inactivity, just like a normal phone dial-up connection to the Internet. There is a setup option to “keep alive”...

  • Page 45: Frequently Asked Questions

    ISP. Does the Router support any operating system other than Windows 98, Millennium, 2000, or XP? Yes, but Linksys does not, at this time, provide technical support for setup, configuration or troubleshooting of any non-Windows operating systems.
  • Page 46 Reset the Router by holding down the Reset button for ten seconds. Reset your cable or DSL modem by powering the unit off and then on. Obtain and flash the latest firmware release that is readily available on the Linksys website, www.linksys.com.
  • Page 47 Broadband Router new features that you would like to use. Downloading a more current version of Router firmware will not enhance the quality or speed of your Internet connection, and may disrupt your current connection stability. Will the Router function in a Macintosh environment? Yes, but the Router’s setup pages are accessible only through Internet Explorer 5.0 or Netscape Navigator 5.0 or higher for Macintosh.
  • Page 48 How do I get mIRC to work with the Router? Under the Setup => Forwarding tab, set port forwarding to 113 for the PC on which you are using mIRC. If your questions are not addressed here, refer to the Linksys website, www.linksys.com. Appendix A: Troubleshooting...

  • Page 49: Appendix B: Upgrading Firmware

    Router. To upgrade the Router’s firmware, follow these instructions: 1. Download the Router’s firmware upgrade file from the Linksys website, www.linksys.com or click the Firmware Download from Linksys Web Site button that appears on the System Management screen under the Advanced Setup tab.

  • Page 50: Appendix C: Finding The Mac Address And Ip Address For Your Ethernet Adapter

    10/100 4-Port VPN Router Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter This section describes how to find the MAC address for your computer’s Ethernet adapter so you can use the MAC address cloning feature of the Router. You can also find the IP address of your computer’s Ethernet adapter. This IP address is used for the Router’s filtering, forwarding, and/or DMZ features.

  • Page 51: For The Router's Web-Based Utility

    10/100 4-Port VPN Router 3. Write down the Physical Address as shown on your computer screen; it is the MAC address for your Ethernet adapter. This appears as a series of numbers and letters. The MAC address/Physical Address is what you will use for MAC address cloning or MAC filtering. Note: The MAC address is also called the Physical Address.

  • Page 52: Appendix D: Using The Rt042 Utility

    While many of the Router’s functions can be utilized through the Web-based Utility, a separate utility also comes on the Router’s CD. This RT042 Utility is more graphically oriented and can do many, though not all, of the things the Web-based Utility can do.

  • Page 53: Router Information

    You can then click the orange dot again to allow it to connect to the Internet. The Host Name and IP Address of all PCs will display, and you can click the right mouse button to rename the host name for the PC. Appendix D: Using the RT042 Utility Router Information...

  • Page 54: Figure D-3: The On-Line Scheduler

    Performance Optimization: From this screen, you can list the network applications most often used on your network, according to user, and set the priority at which it is run. Appendix D: Using the RT042 Utility Usage Configuration Screens Figure D-3: The On-Line Scheduler...

  • Page 55: Figure D-5: The Real Time Usage Screen

    To refresh the information on the screen, click the Refresh button. If you need help on-line, click the Help button. Click Save to save the blocked list or click the Cancel button to undo your changes. Figure D-6: The Hit Rate Screen Appendix D: Using the RT042 Utility Usage Configuration Screens...

  • Page 56: Figure D-7: The Performance Optimization Screen

    To refresh the information on the screen, click the Refresh button. If you need help on-line, click the Help button. Click Save to save the blocked list or click the Cancel button to undo your changes. Figure D-7: The Performance Optimization Screen Appendix D: Using the RT042 Utility Usage Configuration Screens...

  • Page 57: Appendix E: The Setup Wizard

    Broadband Router Appendix E: The Setup Wizard While the Broadband Router can be set up using the Web-based Utility, Internet connection can also be set up using the Setup Wizard, located on the Network screen of the Basic Setup tab. This wizard will walk you through the steps necessary to set up your Internet connection.

  • Page 58: Figure E-3: Select Wan Connection Type

    Broadband Router 3. From the next screen, choose your WAN (or Internet) connection type. Obtain an IP automatically is chosen by default. Click Next to continue. Click Previous if you want to return to the previous screen. Click Exit if you want to exit the wizard.

  • Page 59: Figure E-5: Static Ip

    Broadband Router If you chose Static IP, the Static IP screen appears. Enter the Static IP, Subnet Mask, and Default Gateway provided by your ISP. Click Next to continue. Click Previous if you want to return to the previous screen. Click Exit if you want to exit the wizard.

  • Page 60: Appendix F: Windows Help

    Broadband Router Appendix F: Windows Help All Linksys networking products require Microsoft Windows. Windows is the most used operating system in the world and comes with many features that help make networking easier. These features can be accessed through Windows Help and are described in this appendix.

  • Page 61: Appendix G: Glossary

    Broadband Router Appendix G: Glossary Adapter - A device that adds network functionality to your PC. Bandwidth - The transmission capacity of a given device or network. Bit - A binary digit. Boot - To start a device and cause it to start executing instructions. Broadband - An always-on, fast Internet connection.
  • Page 62 Broadband Router Dynamic IP Address - A temporary IP address assigned by a DHCP server. Ethernet - A network protocol that specifies how data is placed on and retrieved from a common transmission medium. Firewall - A set of related programs located at a network gateway server that protects the resources of a network from users from other networks.
  • Page 63 Broadband Router Network - A series of computers or devices connected for the purpose of data sharing, storage, and/or transmission between users. Node - A network junction or connection point, typically a computer or work station. Packet - A unit of data sent over a network. Ping (Packet INternet Groper) - An Internet utility used to determine whether a particular IP address is online.
  • Page 64 Broadband Router TCP/IP (Transmission Control Protocol/Internet Protocol) - A set of instructions PCs use to communicate over a network. TFTP (Trivial File Transfer Protocol) - A version of the TCP/IP FTP protocol that has no directory or password capability. UDP (User Datagram Protocol) - A network protocol for transmitting data that does not require acknowledgement from the recipient of the data that is sent.

  • Page 65: Appendix H: Specifications

    Broadband Router Appendix H: Specifications Standards IEEE 802.3, 802.3u Ports Power, Internet, and Ethernet Button Reset Cabling Type Cat-5 LEDs Ethernet, Internet1, Internet2, Diag, and System UPnP able/cert able Security Features SPI, port, MAC, IP filter Dimensions 6.69" x 6.69" x 1.26" (W x H x D) (170 mm x 170 mm x 32 mm) Unit Weight...

  • Page 66: Appendix I: Warranty Information

    Your exclusive remedy and Linksys' entire liability under this warranty will be for Linksys at its option to repair or replace the Product or refund Your purchase price less any rebates.

  • Page 67: Appendix J: Regulatory Information

    Broadband Router Appendix J: Regulatory Information FCC Statement This product has been tested and complies with the specifications for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.

  • Page 68: Appendix K: Contact Information

    Can't find information about a product you want to buy on the web? Do you want to know more about networking with Linksys products? Give our advice line a call at: Or fax your request in to: If you experience problems with any Linksys product,...

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