3Com 3CRWE554G72T User Guide

3Com 3CRWE554G72T - OfficeConnect Wireless 11g Cable/DSL Router Manual

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  • 3Com 3CRWE554G72T | User Guide - Page 1
    OfficeConnect® Wireless 11g Cable/DSL Router User Guide 3CRWE554G72T 3CRWE554G72TU http://www.3com.com/ Part No. DUA0554-TAAA02 Published November 2004
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    at any time. If there is any software on removable media described in this documentation, it in conjunction with, this User Guide. Unless otherwise indicated, 3Com registered trademarks are registered other countries, licensed exclusively through X/Open Company, Ltd. Netscape Navigator is
  • 3Com 3CRWE554G72T | User Guide - Page 3
    Convention 7 Conventions 8 Feedback about this User Guide 8 Related Documentation 9 1 INTRODUCING THE ROUTER OfficeConnect Wireless 11g Cable/DSL Router 11 Router Advantages 13 Package Contents 13 Minimum System and Component Requirements 14 Front Panel 14 Rear Panel 16 2 HARDWARE INSTALLATION
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    Disabling PPPoE and PPTP Client Software 28 Disabling Web Proxy 28 4 RUNNING THE SETUP WIZARD Accessing the Wizard 29 Password 32 Time Zone 33 WAN Settings 33 LAN Settings 40 DHCP 40 Wireless Settings 41 Summary 42 5 ROUTER CONFIGURATION Navigating Through the Router Configuration Pages 45 Main Menu
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    98 Usage 99 Logs 100 Support/Feedback 100 Support 100 Feedback 101 6 TROUBLESHOOTING Basic Connection Checks 103 Browsing to the Router Configuration Screens 103 Connecting to the Internet 104 Forgotten Password and Reset to Factory Defaults 105 Wireless Networking 105 Replacement Power Adapters
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    Obtain an IP Address and Subnet Mask? 115 DHCP Addressing 115 Static Addressing 115 Auto-IP Addressing 115 C TECHNICAL SPECIFICATIONS D SAFETY INFORMATION E END USER SOFTWARE LICENSE AGREEMENT F ISP INFORMATION GLOSSARY INDEX REGULATORY NOTICES FOR THE WIRELESS 11G CABLE/DSL ROUTER Industry Canada
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    information in the release note. Most user guides and release notes are available in Adobe Acrobat Reader Portable Document Format (PDF) on the 3Com World Wide Web site: http://www.3com.com Naming Convention Throughout this guide, the OfficeConnect Wireless 11g Cable/DSL Router is referred to as the
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    software button names. Examples: From the Help menu, select Contents. Click OK. Feedback about this Your suggestions are very important to us. They will help make our User Guide documentation more useful to you. Please e-mail comments about this document to 3Com at: [email protected]
  • 3Com 3CRWE554G72T | User Guide - Page 9
    Wireless 11g Cable/DSL Router User Guide ■ Part Number DUA0554-TAAA02 ■ Page 24 Do not use this e-mail address for technical support questions. For information about contacting Technical Support, please refer to the Support and Safety Information sheet. Related In addition to this guide, each Router
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    10 ABOUT THIS GUIDE
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    advantage. The OfficeConnect® product range from 3Com has changed all this, bringing networks to the OfficeConnect range give you, the small office user, the same power, flexibility, and protection that OfficeConnect Wireless 11g Cable/DSL Router The OfficeConnect Wireless 11g Cable/DSL Router is
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    network (Figure 2), it becomes your connection to the Internet. Connections can be made directly to the Router, or to an OfficeConnect Switch or Hub, expanding the number of computers you can have in your network. Figure 2 Example Network Using a Wireless 11g Cable/DSL Router Wireless 11g Cable/DSL
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    the following items: ■ One OfficeConnect Wireless 11g Cable/DSL Router ■ One power adapter for use with the Router ■ Four rubber feet ■ One Ethernet cable ■ One CD-ROM containing the Router Discovery program and this User Guide ■ Installation Guide ■ One Support and Safety Information Sheet ■ One
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    operating system that supports TCP/IP networking protocols (for example Windows 95/98/NT/Me/2000/XP, Unix, Mac OS 8.5 or higher). ■ An Ethernet 10Mbps or 10/100 Mbps NIC for each computer to be connected to the four-port switch on your Router. ■ An 802.11b or 802.11g wireless NIC. ■ A cable modem
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    has invoked the Reset to Factory Defaults command, or ■ The system software is in the process of being upgraded In each of these cases, wait until the Router has completed the current operation and the alert LED is Off. Flashing slowly - The Router has completed the Reset to Factory Defaults process
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    problem (refer to Chapter 6 "Troubleshooting"). The rear panel (Figure 4) of the Router contains four LAN ports, one Ethernet Cable/DSL port, a power adapter OK LED, and a power adapter socket. Figure 4 Router - Rear Panel 6 Wireless
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    which they are connected and the type of cable used. 10 Four 10/100 LAN ports Using suitable RJ-45 cable, you can connect your Router to a computer, or to any other piece of equipment that has an Ethernet connection (for example, a hub or a switch). The LAN ports will automatically set
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    18 CHAPTER 1: INTRODUCING THE ROUTER
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    guide you through a basic installation of the Router, including: ■ Connecting the Router to the Internet. ■ Connecting the Router to your network. ■ Setting up your computers for networking with the Router to the wireless computers that will connect to the Router. A suitable location might be
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    through the vents in the side of the case is not restricted. 3Com recommends you provide a minimum of 25 mm (1 in.) clearance. Using the Rubber of the underside of your Router. Stacking the Router If you are stacking your Router with other OfficeConnect units, install the Router at the top of the
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    this information. If you have a DSL connection and your ISP allocates IP information dynamically over PPPoE, you need a User Name and Password: PPPoE User Name PPPoE Password PPPoE Service Name You only need a PPPoE Service Name if your ISP requires one. Do not enter anything if your
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    22 CHAPTER 2: HARDWARE INSTALLATION If your ISP allocates fixed or static IP information, you need the following information: IP Address Subnet Mask Default Router address DNS address If your ISP allocates IP information dynamically over a protocol other than PPPoE, you do not
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    2 1 LAN Your PC Wireless Users To use your Router to connect to the Internet Router to communicate with the Internet. 3Com recommends that you perform the initial Router configuration from a computer that is directly connected to one of the LAN ports. If you configure the Router from a wireless
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    24 CHAPTER 2: HARDWARE INSTALLATION To communicate wirelessly with your Router, your wireless NIC should be set as follows: ■ Encryption - none ■ Service Area Name/SSID - 3Com ■ Channel - 11
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    wish to change this, then you should use the Discovery program on the Router CD-ROM to detect and configure your Router. Refer to Appendix A for information on using the Discovery program. Obtaining an IP Address Automatically Refer to the section below which relates to your operating system for
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    SETTING UP YOUR COMPUTERS Figure 6 Local Area Properties Screen 6 Ensure that the options Obtain an IP Address automatically, and Obtain DNS server address automatically are both selected as shown in Figure 7. Click OK. Figure 7 Internet Protocol (TCP/IP) Properties Screen 7 Restart your computer.
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    Address Automatically 27 Windows XP If you are using a Windows XP computer, use the following procedure to change your TCP/IP settings: 1 From the Windows Start menu, select Control Panel. 2 Click on Network and Internet Connections. 3 Click on the Network Connections icon. 4 Double click on LAN
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    Connection option. Figure 8 Internet Properties Screen Disabling Web Proxy You may wish to remove the PPPoE client software from your computer to free resources, as it is not required for use with the Router. Ensure that you do not have a web proxy enabled on your computer. Go to the Control Panel
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    1.2.1 or higher). To use the Setup Wizard: 1 Ensure that you have at least one computer connected to the Router. Refer to Chapter 2 for details on Location Field (Factory Default) 4 To log in as an administrator, enter the password (the default setting is admin) in the System Password field and
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    30 CHAPTER 4: RUNNING THE SETUP WIZARD Figure 10 Router Login Screen 5 If the password is correct, the Country Selection screen will appear. Select the country you wish to configure the Router for, then click Apply. (Figure 11) If your purchased your Router in the United States, you do not see this
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    The Welcome screen will appear (Figure 12). Select the Wizard tab and click Wizard. or ■ If your Router has not been configured before, the Wizard will launch automatically (refer to Figure 13). 7 Click Next. 8 You will be guided step by step through a basic setup procedure. Figure 12 Welcome Screen
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    14) appears, type the Old Password, then a new password in both the New Password and Confirm Password boxes. 3Com recommends entering a new password when setting up the Router for the first time. The Router is shipped from the factory with a default password, admin. 1. Password is case sensitive.
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    Accessing the Wizard 33 2. Write the new password down and keep it in a safe place, so that you can change your settings in the future. Click Next to display the Time Zone setup screen (Figure 15). Time Zone Figure 15 Time Zone Screen Select your time zone from the pull-down menu, check
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    " on page 65. PPPoE Mode Figure 17 PPPoE Screen To setup the Router for use with a PPP over Ethernet (PPPoE) connection, use the following procedure: 1 Enter your PPP over Ethernet user name in the PPPoE User Name text box. 2 Enter your PPP over Ethernet password in the PPPoE Password text box.
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    service name. 4 Enter the MTU value supplied by your ISP in the MTU text box. If your ISP has not supplied an MTU value, leave this at the default value. The default page 40 for more information. Dynamic IP Address Mode To setup the Router for use with a dynamic IP address connection: 1 Select the
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    address manually and enter the values for a MAC address if required (Figure 19). If the computer you are now using is the one that was previously connected directly to the cable modem, choose Yes, please clone the MAC address from the PC I'm currently using. Static IP Mode To setup the Router for
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    PPTP Mode Screen To setup the Router for use with a PPTP connection, use the following procedure: 1 Enter your PPTP server address in the PPTP Server Address text box. 2 Enter your PPTP user name in the PPTP User Name text box. 3 Enter your PPTP password in the PPTP Password text box. 4 Enter your
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    SETUP WIZARD 6 Select an idle time from the Maximum Idle Time drop-down list. This is the amount of time without Internet activity that you want to allow before the Router ends the PPTP session. 7 Check all of your settings, and then click Next. Figure 22 displays. Figure 22 PPTP IP Settings 8 IP
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    39 To set up the Router for use with an L2TP connection, use the following procedure: 1 Enter your L2TP server address in the L2TP Server Address text box. 2 Enter your L2TP user name in the L2TP User Name text box. 3 Enter your L2TP password in the L2TP Password text box. 4 Enter your Primary
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    40 CHAPTER 4: RUNNING THE SETUP WIZARD LAN Settings Figure 24 LAN IP Address Screen This screen displays a suggested LAN IP address and subnet mask of the Router. It also allows you to change the IP address and subnet mask. DHCP The Router contains a Dynamic Host Configuration (DHCP) server that can
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    be entered for the Service Area Name. 3Com strongly recommends that you change the SSID to something other than the default. Click Next when you have finished. If you are configuring the Router from a wireless computer any changes you make to the wireless configuration will result in communication
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    as this may be useful if you experience problems with your clients. Summary Figure 27 Configuration Summary Screen When you complete the Setup Wizard, a configuration summary will display. 3Com recommends that you verify the configuration information of the Router and then print this page for your
  • 3Com 3CRWE554G72T | User Guide - Page 43
    , you may need to reconfigure the computer you are using in order to make contact with the Router again. Your Router is now configured and ready for use. For information on improving your Wireless network security see "Wireless Settings" on page 51. See Chapter 5 for a detailed description of the
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    44 CHAPTER 4: RUNNING THE SETUP WIZARD
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    ■ Welcome - displays the firmware version of the Router, allows you to change your password, and launch the Wizard ■ LAN Settings - allows you to configure IP address and subnet mask information, set up DHCP server parameters, and display the DHCP client list. ■ Wireless Settings - enables /disables
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    Security. ■ Status and Logs - displays the current status and activity logs of the Router. ■ Support/Feedback - contains a comprehensive online help system and allows you to provide 3Com with feedback on your Router. Option Tabs Each corresponding menu page may also provide sub-sections which are
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    the new password in the New Password field 3 Enter the new password again in the Confirm Password field 4 Click Apply to save the new password The password is case sensitive. If you have forgotten your password you need to reset the Router. See "Forgotten Password and Reset to Factory Defaults" on
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    48 CHAPTER 5: ROUTER CONFIGURATION Wizard Figure 31 Wizard Screen Click WIZARD... to launch the configuration wizard. Refer to Chapter 4 for information on how to run the wizard. LAN
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    to configure the DHCP server. 1 Select Unit Configuration and then specify the Router IP Address and Subnet Mask in the LAN Settings section. The default IP address of the Router is 192.168.1.1. 2 If you want to use the Router as a DHCP Server, check the Enable check box. 3 Clicking Auto Range will
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    . The release button allows the lease time for the IP address that has IP addresses available. Adding Fixed DHCP Mappings You can add Fixed Mappings so that the Router allocates an IP address chosen by you when it encounters a particular device. Click New to display the DHCP Fixed Mapping Setup
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    Wireless Settings 51 Figure 34 DHCP Fixed Mapping Setup Screen You only need to create Fixed Mappings for devices that need a specific IP address. For devices that do not need a specific IP address, the Router will automatically allocate addresses. To add a Fixed Mapping: 1 Enter the IP Address
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    to either the Internet or other PCs on your Wired or Wireless LAN through this Router. Channel Selection Select a number from the drop-down list to specify which Channel the Router will transmit and receive on. If another access point or Router nearby is using the same Channel as you, there will be
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    networking vendor. By default the Router uses the name "3Com". 3Com recommends that you change the default name. In order that your wireless computers can connect to the Router, you must: ■ Use Infrastructure Mode, not Ad hoc Mode. ■ Have the same Service Area Name as the Router. ■ Have the same
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    with user configurable fixed keys. WPA provides a higher level of security, provided by its longer key and dynamic changes made to the key over time. 3Com recommends that you use WPA with any clients which support it. If you enable encryption on the Router, you must reconfigure your wireless PCs
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    between the Router and the client. During this dialog, a new key is agreed, making it more difficult to eavesdrop on wireless networks button next to Primary RADIUS Server. The RADIUS Server Settings pop-up window opens. 3 Enter the RADIUS Server IP address. 4 Enter the Server Port. The default
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    56 CHAPTER 5: ROUTER CONFIGURATION 6 Select the Modify button to save the changes and return to the Encryption screen, or select Close to exit without saving the changes. 7 If required, repeat steps 2 to 6 for a Secondary RADIUS Server. 8 Click Apply to generate the key. Using Manual Pre-Shared Key
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    Wireless Settings 57 Using Pre-Shared Passphrase Figure 38 WPA Encryption Screen - Pre-Shared Passphrase To set up Pre-Shared Passphrase as the WPA Type: 1 Select
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    58 CHAPTER 5: ROUTER CONFIGURATION Encryption Keys Figure 39 128 bit Encryption Keys Screen - WEP configuration data. There can be up to 4 keys and each key can be as long as 26 digits. The Router also offers a number of methods for converting plain text into hex keys. The text is much easier to
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    method allows you to manually enter hex keys. Virtually all manufacturers support this scheme. Enter a two digit hexadecimal number in every box. Hexadecimal numbers are formed from 0-9 and A-F. ■ 3Com Encryption String - This method is supported by 3Com Wireless products. The string can contain
  • 3Com 3CRWE554G72T | User Guide - Page 60
    A higher level of security can be achieved for your wireless network if, in addition to using encryption, you specify that only certain wireless computers can connect to the Router. By default, any wireless computer that has the same Service Area Name/SSID, channel and encryption settings as the
  • 3Com 3CRWE554G72T | User Guide - Page 61
    , currently operating, and have the same Service Area Name/SSID, channel and encryption settings as the Router. You will find this screen easier to use if you set up and make a note of all of your wireless PC's on your network first. You may also add the entries manually if you know the MAC address
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    62 CHAPTER 5: ROUTER CONFIGURATION Modifying a MAC Address To modify a MAC address from the 43 MAC Address Table Click Close to discard all changes. Deleting a MAC Address The connection rights for a Wireless PC listed in the table can be removed by pressing Delete for that entry in the table. Once
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    client list will grow to a maximum of 32 (the maximum number of wireless devices that the Router can support). WDS Figure 45 WDS Screen The Router supports the Wireless Distribution System (WDS) repeater mode. WDS repeating enables one or more Access Points to rebroadcast received signals to extend
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    Figure 46 Profile Screen Some 3Com Wireless Network Adapters allow you to import Wireless configurations via a 'profile'. The Router can generate a profile so that you do not need to configure your Wireless PCs manually. The profile contains three items as follows: ■ Service Area Name/SSID of the
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    PC and imported into the 3Com Wireless Network Adapter. For instructions on how to import a profile, refer to the User Guide that accompanies your 3Com Wireless Network Adapter(s). If, once the profile is imported, the Wireless Network Adapter cannot connect to the Router, check that the adapter is
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    by some European providers. If the installation instructions that accompany your modem ask you to setup a dialup connection using a PPTP VPN tunnel then select this option. To configure the Router you will need to know the following: ■ User name ■ Password ■ VPN Server address (usually your modem
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    Address Figure 47 Connection Parameters Screen - Static IP To setup the Router for use with a Static IP address connection: 1 Select Static IP Address (to be specified manually) in the IP Allocation Mode field (Figure 47). 2 Enter your IP Address in the IP Address text box. This information, along
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    menu bar). To setup the Router for use with a dynamic IP address connection: 1 Select Dynamic IP Address (automatically allocated) in the IP Allocation Mode field. ■ Use the Router's original Internet MAC address - This field is selected by default and is automatically filled in with the MAC address
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    . 5 Check all settings and click Apply. PPP over Ethernet Figure 49 PPPoE Setup Screen To setup the Router for use with a PPP over Ethernet connection, use the following procedure: 1 Select PPP over Ethernet in the IP Allocation Mode field. (Figure 49) 2 Enter your Primary DNS Address and Secondary
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    name in the PPPoE User Name text box. 5 Enter a password in the PPPoE Password text box. 6 Enter your PPP over Ethernet service name in the PPPoE Service Name text box. Not all ISPs require a PPPoE service name. Only enter a service name if your ISP requires this. 7 Enter the MTU value supplied by
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    providers) in the IP Allocation Mode field. (Figure 50) 2 Enter your PPTP server address in the PPTP Server Address text box (this is typically the address of your modem). 3 Enter your PPTP user name in the PPTP User Name text box. 4 Enter your password in the PPTP Password text box. 5 Enter
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    CONFIGURATION L2TP Figure 51 L2TP Setup Screen Check with your ISP to make sure they support L2TP. To set up the Router for use with an L2TP connection, use the following procedure: 1 Select L2TP (used by some European providers) in the IP Allocation Mode field. 2 Enter your L2TP server address
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    to release the WAN IP Address for the Router, or click Renew to renew the current WAN IP Address, using DHCP. ■ Fill in the Initial IP Address, Initial Subnet the Firewall option on the main menu displays the Virtual Servers setup screen. (Figure 52) Virtual DMZ Figure 52 Virtual Servers Screen
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    server, allowing others outside of your office network to download files of your choosing. Or, if you have open the Virtual Server Settings dialogue box. (Figure 53) 2 Enter the last digit(s) of the IP address of the computer in the Server IP Address text box. 3 Either: ■ Select a Local Service
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    Figure 54 Custom Setup Screen Firewall 75 Click Add to return to the Virtual Server Settings screen. 4 Click Screen Select Special Apps tab to display Authorized Application setup screen. (Figure 55) Some software applications require special or multiple connections to the Internet and
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    76 CHAPTER 5: ROUTER CONFIGURATION trigger port and incoming port(s), where traffic on the trigger port tells the firewall to open the incoming ports. Each defined Special Application only supports a single computer user, and up to 10 Special Applications can be defined. Any incoming ports opened by
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    Figure 57 Other Applications Setup Screen Firewall 77 Click Add to save your settings. 3 Click Add in the Special Application Settings setup screen (Figure 58). Access from the local network to the Internet can be controlled on a computer-by-computer basis. In the default configuration the Router
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    for all computers connected to the Router. The screen shown in Figure 59 displays. Figure 59 All PCs Setup Screen 3 If required, check the services. 3. Enter '2, 3, 5-7' in the 'except (specify ports) box. See Figure 59. 6 If required, you can schedule when PCs can access the Internet. By default
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    individual computers. The PC Privileges setting screen displays, as shown in Figure 60. Figure 60 Individual PCs Setup Screen 3 Enter the last digit(s) of the IP address of the computer in the PC's IP Address text box. 4 If required, check the Bypass URL Filter check box to override the URL Filter
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    17:00 in the text boxes next to each of these days. 8 Click Add to save the settings. URL Filter Select the URL Filter tab to set the to access. The Router's URL Filter has three settings: ■ Disabled - Users can browse all Web sites. None will be filtered. ■ Deny List - Users can browse all Web
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    sex would filter the following example URLs: ■ www.sussex.com ■ www.thisexample.com You can filter up to 30 keywords and URLs. Computers PC Privileges setup screen. See "PC Privileges" on page 77. Allow List To stop users from accessing any Web sites that you have not specifically allowed, choose
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    82 CHAPTER 5: ROUTER CONFIGURATION Figure 62 URL Filter Screen showing Allow List To allow a specific site, enter the URL for that site. For example, to let your users browse a site called www.goodsite.com, enter www.goodsite.com or goodsite.com in one of the fields. If goodsite.com has multiple sub
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    your Router at www.3com.com. To continue using the service after the trial period, you must purchase the full 3Com Content Filter Service (3CSBCFS). URL filtering rules supersede content filtering rules. If the 3Com Content Filter is blocking certain Web sites that you want to allow, you can add
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    enter the server IP address in the text box. 4 Select the Server Timeout value in milliseconds. The default is 3000 milliseconds Service (DoS) attacks are aimed at devices and networks with a connection to the Internet. The goal is not to steal information, but to disable a device or network so users
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    Firewall 85 1 Select Firewall from the main menu, then select the SPI tab to display the SPI screen (Figure 64 and Figure 65): Figure 64 SPI Screen - upper section Figure 65 SPI Screen - lower section Intrusion Detection Feature The Intrusion Detection feature limits access for incoming traffic at
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    check only the Enable FTP Service check box, all incoming User Name. 8 Enter your SMTP Server Password. Connection Policy 9 In the Fragmentation half-open wait text box, enter the length of time, in seconds, that you want an unassembled packet to remain active before the Router drops it. The default
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    DoS Detect Criteria 15 In the Total incomplete TCP/UDP sessions HIGH text box, enter the number of unestablished sessions that will cause the software to start deleting half-open sessions. The default is 300. 16 In the Total incomplete TCP/UDP sessions LOW text box, enter the number of unestablished
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    Restart the Router, simulating the effect of power cycling the unit. No configuration information will be lost but the log files will be erased. This function may be of use if you are experiencing problems and you wish to re-establish your Internet connection. Any network users who are currently
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    clock by one hour. It does not cause the system clock to be updated for daylight savings time automatically. Configuration Figure 68 Configuration Screen Select the Backup Configuration Click BACKUP to save the current Router configuration. You will be prompted to download and save a file to disk.
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    to copy the data into the Router's memory. The password will remain unchanged. Reset to Factory Default If you want to reset the settings on your Router to those that were loaded at the factory, click RESET. You will lose all your configuration changes. The Router LAN IP address will revert to 192
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    Router during the upgrade procedure; if you do, the software may be corrupted and the Router may not start up properly afterwards. If the Alert LED comes on continuously after a failed upgrade, refer to Chapter 6, "Troubleshooting this is the default route. ■ Subnet Mask - the subnet mask
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    CONFIGURATION ■ Gateway - the gateway used to route data to the network specified by the network address. RIP The Router supports the Routing Information Protocol (RIP). RIP allows you to set up routing information on one RIP enabled device, and have that routing information replicated to
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    devices. If you select Silent, the Router only receives RIP update messages. 2 Select either 1 (for RIPv1) or 2 (for RIPv2) from the Version drop-down list. 3Com recommends that you use RIPv1 if there is any RIP enabled device on your network that does not support RIPv2. In all other case, select
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    screen DDNS Dynamic Domain Name Server (DDNS) enables you to map a static domain name to a dynamic IP address. The Router supports two DDNS providers, TZO.com and DYNDNS.org. Before you can set up DDNS, you must obtain an account, password and static domain name from your DDNS provider. DDNS is
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    select TZO.com: 1 In the Domain Name text box, enter the domain name. 2 In the Username/E-mail text box, enter the account name. 3 In the Key text box, enter the account password. 4 In the Refresh Time box, enter how often you want the service to automatically refresh, in days. The default is three
  • 3Com 3CRWE554G72T | User Guide - Page 96
    96 CHAPTER 5: ROUTER CONFIGURATION 4 In the Refresh Time box, enter how often you want the service to automatically refresh, in days. The default is three days. 5 Click Apply to make this service active. Security Select Security to display the Security screen (Figure 75). Figure 75 Security Screen
  • 3Com 3CRWE554G72T | User Guide - Page 97
    check box to enable this feature, and then select Apply. 3Com recommends that you leave this feature disabled for maximum security. ■ Disable NAT - Network Address Translation (NAT) is the method by which the Router shares the single IP address assigned by your ISP with the computers on the network
  • 3Com 3CRWE554G72T | User Guide - Page 98
    98 CHAPTER 5: ROUTER CONFIGURATION address of the Router. You may then login using the administration password. Your Internet IP address can be found at the bottom of the screen. See Figure 75. Status and Logs Selecting Status and Logs from the main menu displays
  • 3Com 3CRWE554G72T | User Guide - Page 99
    Figure 77 Status Screen - lower section Status and Logs 99 Usage Usage displays an approximate count of the traffic since the Router was last reset. (Figure 78) The counts are approximate and should be used as a guide only. Contact your ISP for accurate logging information. Figure 78 Usage Screen
  • 3Com 3CRWE554G72T | User Guide - Page 100
    view both the normal events, and security threats logged by the Router. Figure 79 Logs Screen You may be asked to refer to the information on the Status and Logs screens if you contact your supplier for technical support. Support/Feedback Selecting Support/Feedback from the main menu displays the
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    of Internet links that provide information and support concerning the Router (Figure 80). Feedback Figure 81 Feedback Screen Selecting the Feedback option displays the Feedback screen and allows you to provide feedback to 3Com on the operation of your Router (Figure 81). This screen should not be
  • 3Com 3CRWE554G72T | User Guide - Page 102
    102 CHAPTER 5: ROUTER CONFIGURATION
  • 3Com 3CRWE554G72T | User Guide - Page 103
    described in Chapter 3, Setting Up Your Computers. Restart your computer while it is connected to the Router to ensure that your computer receives an IP address. ■ When entering the address of the Router into your web browser, ensure that you use the full URL including the http:// prefix (e.g. http
  • 3Com 3CRWE554G72T | User Guide - Page 104
    you have entered the correct information into the Router configuration screens as required by your Internet Service Provider. Use the "Internet Settings" screen to verify this. ■ For DSL users, check that the PPPoE or PPTP user name, password and service name are correct, if these are required. Only
  • 3Com 3CRWE554G72T | User Guide - Page 105
    password, follow the steps below to reset the Router to it's factory default configuration. CAUTION: All your configuration changes will be lost, and you will need to run the configuration wizard again before you can re-establish your Router connection to the Internet. Also, other computer users
  • 3Com 3CRWE554G72T | User Guide - Page 106
    both the wireless computers and the Router to establish whether this problem exists. ■ Most wireless computer Adapters will scan the channels for the wireless Router. If a wireless computer has not located the Router then try initiating a search manually if the client software supports this feature
  • 3Com 3CRWE554G72T | User Guide - Page 107
    LED is unlit then there may be a fault with your unit. Contact 3Com Technical Support. ■ Check that you are using the correct power adapter for your Router. You should only use the power adapter supplied with your Router. Replacement Power Adapters If both the Power Adapter OK LED and Power LED
  • 3Com 3CRWE554G72T | User Guide - Page 108
    detected. Locate the copy of the Router software on the accompanying CD-ROM or 3Com web site (http://www.3com.com) and upload it to the Router to see if this clears the fault (refer to "Recovering from Corrupted Software" below). If this does not fix the problem, contact your supplier for further
  • 3Com 3CRWE554G72T | User Guide - Page 109
    you used for the software upload. If the Router does not resume normal operation following the upload, it may be faulty. Contact your supplier for advice. Frequently Asked Questions How do I reset the Router to Factory Defaults? See "Forgotten Password and Reset to Factory Defaults" on page 105.
  • 3Com 3CRWE554G72T | User Guide - Page 110
    configuration. Where can I download software updates for the Router? Updates to the Router software are posted on the 3Com support web site, accessible by visiting: http://www.3com.com What other online resources are there? The 3Com Knowledgebase at: http://knowledgebase.3com.com is a database of
  • 3Com 3CRWE554G72T | User Guide - Page 111
    Running the Discovery Application 3Com provides a user friendly Discovery application for detecting the Router on the network. Windows Installation (95/98/2000/Me/NT) 1 Insert the Router CD-ROM in the CD-ROM drive on your computer. A menu will appear; select Router Discovery. Discovery will find
  • 3Com 3CRWE554G72T | User Guide - Page 112
    112 APPENDIX A: USING DISCOVERY Figure 83 Discovered Router Screen 3 Figure 84 shows an example Discovered Devices screen. Highlight the Cable/DSL Router by clicking on it, and press Next. Figure 84 Discovery Finish Screen 4 Click on Finish to launch a web browser and display the login page for
  • 3Com 3CRWE554G72T | User Guide - Page 113
    of two of the protocols (IP and TCP) working together. TCP/IP is an internationally adopted and supported networking standard that provides connectivity between equipment from many vendors over a wide variety of networking technologies. Managing the Router over the Network To manage a device
  • 3Com 3CRWE554G72T | User Guide - Page 114
    . The only value that will be different is the specific host device number. This value must always be unique. An example IP address is '192.168.100.8'. However, the size of the network determines the structure of this IP Address. In using the Router, you will probably only encounter two types of
  • 3Com 3CRWE554G72T | User Guide - Page 115
    four computers represented) and a Router might be configured. Table 5 IP Addressing and Subnet Masking Device PC 1 PC 2 PC 3 PC 4 Router IP Address 192.168.100.8 192. users on them. Static Addressing You must enter an IP Address and the subnet mask manually on every device. Using a static IP
  • 3Com 3CRWE554G72T | User Guide - Page 116
    of 255.255.0.0). If two devices allocate themselves the same address, the conflict is detected and one of the devices allocates itself a new address. Automatic IP addressing support was introduced by Microsoft in the Windows 98 operating system and is also
  • 3Com 3CRWE554G72T | User Guide - Page 117
    the technical specifications for the OfficeConnect Wireless 11g Cable/DSL Router. Wireless 11g Cable/DSL Router Interfaces Cable/ 24, 18, 12, or 6 Mbps Maximum channels: 14 Range up to 304.8m (1000ft) Frequency: (US/Canada/Europe) 2.400-2.4835 GHz Sensitivity: 6, 12, 18, 24, 36, 48 Mbps: -85 dBm;
  • 3Com 3CRWE554G72T | User Guide - Page 118
    118 APPENDIX C: TECHNICAL SPECIFICATIONS Encryption: 40/64 bit WEP, 128 bit WEP, WPA Maximum clients: 128 O/P Power 18dBm Operating Temperature 0 °C to 40 °C (32 °F to 105 °F) Power 7VA, 23.9 BThU/
  • 3Com 3CRWE554G72T | User Guide - Page 119
    or higher ■ Unix Ethernet Performance The Router complies to the IEEE 802.3i, u and x specifications. Wireless Performance The Router has been designed to conform to the Wi-Fi interoperability test standard. Cable Specifications The Router supports the following cable types and maximum lengths
  • 3Com 3CRWE554G72T | User Guide - Page 120
    120 APPENDIX C: TECHNICAL SPECIFICATIONS
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    the equipment to which it is connected also operates under SELV conditions. WARNING: There are no user-replaceable fuses or user-serviceable parts inside the Router. If you have a physical problem with the unit that cannot be solved with problem solving actions in this guide, contact your supplier.
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    zu befolgen. Sie müssen die folgenden Sicherheitsinformationen sorgfältig durchlesen, bevor Sie das Geräts installieren oder ausbauen: VORSICHT: Der Router erzeugt und verwendet Funkfrequenz (RF). In manchen Umgebungen ist die Verwendung von Funkfrequenz nicht gestattet. Erkundigen Sie sich bei den
  • 3Com 3CRWE554G72T | User Guide - Page 123
    sécurité VORSICHT: Es sind keine von dem Benutzer zu ersetzende oder zu wartende Teile in dem Gerät vorhanden. Wenn Sie ein Problem mit dem Router haben, das nicht mittels der Fehleranalyse in dieser Anleitung behoben werden kann, setzen Sie sich mit Ihrem Lieferanten in Verbindung. VORSICHT: Vor
  • 3Com 3CRWE554G72T | User Guide - Page 124
    problème physique avec le moyeu qui ne peut pas être résolu avec les actions de la résolution des problèmes dans ce guide, contacter votre fournisseur. AVERTISSEMENT: Débranchez l'adaptateur électrique avant de retirer cet appareil. AVERTISSEMENT: Ports RJ-45. Il s'agit de prises femelles blindées
  • 3Com 3CRWE554G72T | User Guide - Page 125
    AGREEMENT IMPORTANT: READ BEFORE INSTALLING THE SOFTWARE 3Com END USER SOFTWARE LICENSE AGREEMENT YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CONDITIONS BEFORE DOWNLOADING, INSTALLING AND USING THIS PRODUCT, THE USE OF WHICH IS LICENSED BY 3COM CORPORATION (ì3COMî) TO ITS CUSTOMERS FOR THEIR
  • 3Com 3CRWE554G72T | User Guide - Page 126
    the Software and Documentation, and may be amended only in a writing signed by both parties. Should you have any questions concerning this Agreement or if you desire to contact 3Com for any reason, please contact the 3Com subsidiary serving your country, or write: 3Com Corporation, Customer Support
  • 3Com 3CRWE554G72T | User Guide - Page 127
    Types Characteristics Popular ISPs Dynamic IP (Clone MAC) Dynamic IP (Hostname) Cable modem ISP, Router has this software built in and you can remove it from your PC. You will need to enter the user name and password that your ISP provided to you in the PPPoE page of the Router. Leave the service
  • 3Com 3CRWE554G72T | User Guide - Page 128
    IP information from ISP in the Static IP address section of the Internet Settings page. CableSpeed, Cnet, Direct Link, Drizzle, DSL Extreme, Earthlink Wireless, , ISP assigns specific IP information which needs to be entered on the "Fixed IP" page of the Router. Cox Cable, Sprint, US Cable, Cable-
  • 3Com 3CRWE554G72T | User Guide - Page 129
    pair cable. 100BASE-TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable. Access Point An Access Point is a device through which wireless clients connect to other wireless clients and which acts as a bridge between wireless clients and a wired network, such as
  • 3Com 3CRWE554G72T | User Guide - Page 130
    for network cabling than Category 3, because it supports both Ethernet (10 Mbps) and Fast Ethernet (100 Mbps) speeds. Channel Similar to any radio device, the OfficeConnect Cable/DSL Router allows you to choose different radio channels in the wireless spectrum. A channel is a particular frequency
  • 3Com 3CRWE554G72T | User Guide - Page 131
    . See "WPA" and "WEP" for details. ESSID Extended Service Set Identifier. The ESSID is a unique identifier for your wireless network. You must have the same ESSID entered into the Router and each of it's wireless clients. Ethernet A LAN specification developed jointly by Xerox, Intel and Digital
  • 3Com 3CRWE554G72T | User Guide - Page 132
    responsible for providing engineering solutions for TCP/IP networks. In the network management area, this group is responsible for the development of the SNMP protocol. Infrastructure mode Infrastructure mode is the wireless configuration supported by the Router. You will need to ensure all of
  • 3Com 3CRWE554G72T | User Guide - Page 133
    GLOSSARY 133 ISP Internet Service Provider. An ISP is a business that provides connectivity to MAC addresses are 6 bytes long. NAT Network Address Translation. NAT enables all the computers on your network to share one IP address. The NAT capability of the Router allows you to access the Internet
  • 3Com 3CRWE554G72T | User Guide - Page 134
    Service Set Identifier. Some vendors of wireless products use SSID interchangeably with ESSID. Subnet Address An extension of the IP addressing scheme that allows a site to use a single IP to bridges, in that they connect LANs of a different type; however they connect more LANs than a bridge and
  • 3Com 3CRWE554G72T | User Guide - Page 135
    a bridging and/or a repeater mode. In wireless bridging, APs communicate only with each other to bridge together two separate networks. In wireless repeating, APs rebroadcast received signals to extend reach and range, at the expense of throughput. The Router uses wireless repeating. WECA Wireless
  • 3Com 3CRWE554G72T | User Guide - Page 136
    Client The term used to describe a desktop or mobile PC that is wirelessly connected to your wireless network Wireless LAN Service Another term for ESSID (Extended Service Set Identifier) Area Wizard A Windows application that automates a procedure such as installation or configuration. WLAN
  • 3Com 3CRWE554G72T | User Guide - Page 137
    INDEX A Access Rights 79 Addresses IP 113 Administration Password 32, 47 Advanced 91 DDNS 94 RIP 92 routing table 94 security 96 static route 91 Automatic Addressing 115 C Cable Specifications 119 Channels 139 Clone MAC address 68 Configuration backup 89 restore 90 Connection Policy 86 content
  • 3Com 3CRWE554G72T | User Guide - Page 138
    36, 40, 113 Summary 42 Support Information 100 Support Links 101 T TCP/IP 25, 27, 40, 113 Technical specifications 117 standards 117 Time Zone 33, 88 U Unit Configuration 48 Upgrade 90 URL Filter 80 V Virtual Servers 73, 74 W WAN 33 WDS 63 Web Proxy 28 Wireless authorized PCs 61 channel selection
  • 3Com 3CRWE554G72T | User Guide - Page 139
    NOTICES FOR THE WIRELESS 11G CABLE/DSL ROUTER Use of the Wireless 11g Cable/DSL Router is only authorized local regulatory agencies: Channel Configuration is only available on the 3CRWE554G72T unit. The 3CRWE554G72TU unit is for use in the US, and the channel is pre-configured. Table 5 Channels
  • 3Com 3CRWE554G72T | User Guide - Page 140
    and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there , which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures
  • 3Com 3CRWE554G72T | User Guide - Page 141
    determined by turning the equipment off and on, the user is encouraged to try to correct the interference by How to Identify and Resolve Radio-TV Interference Problems This booklet is available from the U.S. 3CRWE554G72T Wireless 11g Cable/DSL Router 3CRWE554G72TU Wireless 11g Cable/DSL Router (US
  • 3Com 3CRWE554G72T | User Guide - Page 142
    below the FCC radio frequency exposure limits. Nevertheless, the 3Com OfficeConnect Wireless 11g Cable/DSL Router shall be used in such manner that the potential for human contact during normal operation is minimized. The distance between the antennas and the user should not be less than 20 cm. This
  • 3Com 3CRWE554G72T | User Guide - Page 143
    143 Potential RF Interference (Canada) CAUTION: To prevent radio interference to the licensed service, this device is intended to be operated indoors and away from windows to provide maximum shielding. Equipment (or it's transmit antenna) that is installed outdoors
  • 3Com 3CRWE554G72T | User Guide - Page 144
    144
  • 3Com 3CRWE554G72T | User Guide - Page 145
  • 3Com 3CRWE554G72T | User Guide - Page 146
    and services, visit our World Wide Web site at www.3com.com Copyright © 2004 3Com Corporation. All rights reserved. 3Com and OfficeConnect are registered trademarks of 3Com Corporation. All other company and product names may be trademarks of their respective companies. All specifications are
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Part No. DUA0554-TAAA02
Published November 2004
OfficeConnect
®
Wireless 11g Cable/DSL Router
User Guide
3CRWE554G72T
3CRWE554G72TU