NETGEAR CG814M manuale d’uso

SM-CG814MNA-0 September 2002 NETGEAR , Inc. 4500 Great America Parkway Santa Clara, CA 95 054 USA Phone 1-888-NETGEAR Reference Manual for the Model CG814M Wireless Cable Modem Gateway[...]

ii © 2002 by NETGEAR, Inc. All rights reserved. T rademarks NETGEAR is a tr ademark of Netge ar , Inc. Microsoft, W indows, and W indow s NT are registered trademar ks of Microsoft Corporation. Other brand and product names are registered tradem arks or trademarks of their respective holders. St atement of Conditions In the interest of improving i[...]

iii Bestätigung des Hers tellers/Importe urs Es wird hiermit bestätigt, daß da s CG814M W ireless Cable M odem Gateway gemä ß der im BMP T -AmtsblVfg 243/1 991 und Vfg 46/1992 aufgeführten Bestimmun gen entstört ist. Das vorschriftsmäßige Betrei ben einiger Geräte (z.B. T estsender) kann jedoch gewissen Beschränkungen unterlie gen. Lesen[...]

iv[...]

Contents v Content s About This Manual ..... ................................................................ ................. ............ ........... .. . xi Audience ............. ............ ................. ............. ................ ............. ............. ................ ..... ..... xi T ypographical Conventions ................ [...]

vi Contents Connecting the CG814M Gateway ..................... ................ ............. ................ ............... 2-5 Connecting to Y our Computer ............................ ............. ................. ................ ........ 2-5 Ethernet .......... ............. ................ ............. ............. ................ ..[...]

Contents vii Viewing Gateway S tatus ........................ ............ ................. ............. ................ ........ 5-2 Connection S tatus . ............. ................ ............. ................ ............. ................ ............ 5-4 Current System T ime .......... ............. ......... ....... ............. ....[...]

viii Contents Single IP Address Operation Using NA T ............ ................. ................ ................ .... B-8 MAC Addresses and Address Re solution Protocol ...................... ................ ........... B-9 Related Documents ...... ................ ................ ............. ................ ................ .............[...]

Contents ix What Is Y our Configuration Information? .. ... ................ ............. ............. ................ . C-9 Obtaining ISP Configuration Information for Windows Computers ............ ..... C-10 Obtaining ISP Configuration Information for Macintosh Computers ...... ......... C-1 1 Restarting the Network ................ .........[...]

x Contents[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway About This Manual xi About This Manual Thank your for purcha sing the NETGEAR ™ CG814M W ireless Cable Modem Gateway. This manual describes the features of the gatewa y and provides installation and configuration instructions. Audience This reference manual a ssumes that the read[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway xii About This Manual S pecial Message Format s This guide uses the following format s to highlight special messages: T echnical Support For help with any t echnical issues, contact Custo mer Support at 1-888-NETGEAR, or vi sit us on the W eb at www .NETGEAR.com. The NETGEAR W e b [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Introduction 1-1 Chapter 1 Introduction This chapter describes the features of the N ETGEAR CG814M W ireless Cable Modem Gateway. About the CG814M Gateway The NETGEAR CG814M W ireless Cable Modem Gateway connects directly to the wide area network (W AN) using its built-in cab le mo[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 1-2 Introduction A Powerful, T rue Firewall Unlike simple Internet sharing NA T routers, the CG 814M Gateway is a true firewall, using stateful packet inspection to defend against hacker attacks. Its firewall features include: • Denial of Service (DoS) protection Automatically de[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Introduction 1-3 Configurable Auto Upli nk™ Ethernet Connection W ith its internal 4-port 10/100 sw itch, the CG814M Gateway can connect to either a 10 Mbps standard Ethernet network or a 100 Mbps Fast Ethernet network. Both the local LAN and the Internet W AN interfaces are auto[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 1-4 Introduction Easy Inst allation and Management Y ou can ins tall, configure, and op erate the CG81 4M Gateway within minutes after connecting it to the network. The following features simp lify installation and management tasks: • Browser-based management Browser-based config[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Introduction 1-5 What’ s in the Box? The product package should contain the following items: • CG814M W ireless Cable Modem Gateway •A C p o w e r a d a p t e r • Category 5 (CA T5) Ethernet cable • USB cable • Resour ce CD , including: — This manual — Application N[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 1-6 Introduction Y ou can use some of the LEDs to verify connections . Ta b l e 1- 1 lists and describes each LED on the front panel of the CG814M Gateway . These LEDs are green when lit. Ta b l e 1- 1. LED Descriptions Label Activity Description Power On Off Power is supplied to t[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Introduction 1-7 The Gateway’ s Rear Panel The rear panel of the CG81 4M Gateway ( Figure 1-2 ) cont ains the co nnec tions identified below . Figure 1-2: CG814M Gateway Re ar Panel V iewed from left to right, the rear panel contains the following elements: • AC power adapter i[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 1-8 Introduction[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-1 Chapter 2 Connecting the Gateway to the Internet This chapter describes how to set up the CG814M Gateway on your Local Area Network (LAN), connect to the Internet and perform basic configuration. What Y ou Will Need Before Y ou Begin Y o[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-2 Connecting the Gateway to the Internet LAN Configuration Requirement s For the initial connection to the In ternet and configuration of your gateway, you will need to connect a computer to the gateway which is set to automatically get its TC P/IP configuration from the gateway [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-3 • Y ou may also refer to the CG814W Resour ce C D for the NETGEAR Router ISP Guide which provides Internet connection infromation for many ISPs. Once you locate your Internet conf iguration parameters, you may want to record them on th[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-4 Connecting the Gateway to the Internet Record Y our Internet Co nnection Information 1. Print this page. Fill in the configuration parameters from your Internet Ser vice Provider (ISP). Fixed or S tatic IP Address: If you have a static IP address, re cord the following informat[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-5 Connecting the CG814M Gateway Before using your modem, yo u need to do the following: • Connect to your computer , using either Ethernet, USB or wireless (see page 2-6 ). • Connect the line from your cable service provid er to the ca[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-6 Connecting the Gateway to the Internet Ethernet T o connect your computer to t he modem via Ethernet: 1. Locate the Category 5 Ethernet ca ble which came with your modem. 2. Connect your computer to the modem using the Ethernet cable.: USB T o connect your computer to the modem[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-7 The found new hardware W indows installatio n wizard will prompt you for the drivers. Browse to the CD and install the USB driver by clicking through the Windows wizard prompts. Wire le ss Detailed instructions on config uring your wire [...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-8 Connecting the Gateway to the Internet Connecting the Power Adapter T o connect the power adapter to the gateway: 1. Plug the connector of the po wer adapter into outlet on th e rear panel of the modem. 2. Plug the other end of the adapter into an AC power outlet. 3. V erify th[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-9 Now that the gateway, and the computer are turned on, verify the following: • When power on the ga teway was first turned on, the PWR light went on, the numbered LAN LEDs turned on for a few seconds. • The gateway’ s LOCAL LINK/ACT[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-10 Connecting th e Ga teway to the Internet For security reasons, the gateway has its own u ser name and password. When prompted, enter admin for the gateway User Name and pa s s w o r d for the gateway Password, both in lower case letters.. 4. Connect to the Internet Figure 2-4:[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-11 Connecting the CG814M Gateway to the Internet The gateway is now properly attached to your ne twork. Y ou are ready to co nfigure your gateway to connect to the Internet. T o co ntinue installation, click on the Basic Settings menu, sho[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-12 Connecting th e Ga teway to the Internet If you have set your configuration for Dynamic IP , below , then an IP address shown here is an indication that you have successfully receive d an IP address from your service provider . If you have set your configuration to S tatic IP [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Connecting the Ga tewa y to the Internet 2-13 5. Firewall Protection: Normally firewall protection shou ld be enabled to protect your network from attacks from the internet. Removing the check from the “Firew all Protection” box disable s your firewall. 6. Click Apply to save y[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2-14 Connecting th e Ga teway to the Internet[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Wireless Configuration 3-1 Chapter 3 Wireless Configuration This chapter describes how to configure the wire less features of your CG814M Wireless Cable Modem Gateway. Considerations For A Wireless Network In planning your wire less network, you sh ould consider the level of se cur[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 3-2 Wireless Configuration Placement and Range The operating distance or range of your wireless connection can v ary significantly based on the physical placement of the wi reless gateway. For be st results, place your gateway: • near the center of the area in which your PCs will[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Wireless Configuration 3-3 Wireless Settings In the W ireless Settings section are the following parameters: • Name (SSID) Enter a Service Set ID (SSID) value of up to 32 alphanumeric characters. The same SSID mus t be assigned to all wireless devices in your network. The default[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 3-4 Wireless Configuration The W ireless Acce ss window displays a list of MA C addresses that will be allowed to connect to the gateway. These PCs must also have the co rrect SSID and WEP settings . T o restrict access based on MAC addresse s: 1. Click the Add button to go to the [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Wireless Configuration 3-5 • Automatic - Enter a word or group o f printabl e characters in the Passphrase box and click the Generate button. The four key boxes will be automatically populat ed with key values. • Manual - Enter ten hexadecimal digits (a ny combin ation of 0-9, [...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 3-6 Wireless Configuration[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Protecting Your Network 4-1 Chapter 4 Protecting Y our Network This chapter describes how to use the firewall features of the CG814M W ireless Cable Modem Gateway to protect your network . Protecting Access to Y our CG814M Gateway For security reasons, the gateway has its own user [...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4-2 Pro tecting Your Network 2. From the Main Menu of the browser interface, under the Maintenanc e heading, select Set Password to bring up the menu shown in Figure 4-2 . Figure 4-2: Set Password menu 3. T o change the password, first enter the old p assword, and then enter the ne[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Protecting Your Network 4-3 • Allowing access to only web site s that you specify as allowed. • Filtering of Proxy servers, Cooki es, Java, ActiveX and Popup W indows The section below expl ains how to co nfigure your gateway to perform these functions. Block Keywords and Domai[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4-4 Pro tecting Your Network 1. Click on the Block Sites link of the Content Filtering menu. Figure 4-3: Block Sites menu 2. T o enable keyword blocking or Domain Blocking, check th e appropriate Enable box .[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Protecting Your Network 4-5 3. Enter Keywords into the Keyword List by t yping then in the Add Keyword box, then, click Add Keyword. Some examples of Keyword applications follow: • If the keyword “XXX” is specified, the URL <http://www .badstuff.com/xxx.html> is blocked[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4-6 Pro tecting Your Network Most web surfing is done on port 80. The parental control fe ature monitors port 80 so proxy based web surfing would not be insp ected by the parental controls. The p roxy filter shou ld be used if parental controls are being used. Cookies A cookie is a[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Protecting Your Network 4-7 rule you have defined . T o configure outbound rules on th e CG814M Gateway, cli ck the Port Blocking link o n the Advanced section of the main menu. Figure 4-4: Port Blocking menu • T o block ou tbound traffic, select the service you wo uld like to bl[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4-8 Pro tecting Your Network only one IP address to the Inte rnet, and outside users cannot dire ctly address any of your local computers. However, by defining an inbound rule you can make a local server (for example, a web server or game server) visible and available to the Intern[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Protecting Your Network 4-9 1. Select the service you would like to forw ard from the d rop-down list of predefined services. If the service you would like to forward is no t in the predefined list, you can add a custom service. Enter the range of ports yo u would like to forward a[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4-10 Protecting Yo ur Networ k changed. Port T riggering monitors outbound traf fic. When the gateway detects traffic on the specified outbound port, it remembers the IP address of the computer that sent the da ta and “triggers” the incoming port. Incoming traf fic on the trigg[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Protecting Your Network 4 -11 1. In the T rigger Range, enter the outb ound ports that will be monito red for activity . This will be the “trigger”. 2. In the T arge Range, enter the in bound ports that should be forw arded when the trigger occurs. 3. Select the appropriate pro[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4-12 Protecting Yo ur Networ k W AN Port’ check box. This sh ould only be used as a diagnostic tool, since it allows your gateway to be discovered. Don't check th is box unless you have a spe cific reason to do so.[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Managing Your Network 5-1 Chapter 5 Managing Y our Network This chapter describes how to perform network ma nagement tasks with yo ur CG814M W ireless Cable Modem Gateway. Network S t atus Information The CG814M pr ovides a variety of status and usage information which is discussed[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 5-2 Manag ing Your Netw ork V iewing Gateway S t atus From the Main Menu, under Maintenance, sel ect Gateway S tatus to view the screen in Figure 5-1 . Figure 5-1: Gateway St atus screen This screen shows the following parameters: Ta b l e 5-1. Menu 3.2 - Rout er S t atus F ields F[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Managing Your Network 5-3 CM Certificate If the Cable Modem certificate is Instal led, it is possible for the service provider to upgrade your Data Over Cable service securely . S tatus System Up T ime This is the time since the gateway has registered with your cable service provid[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 5-4 Manag ing Your Netw ork Connection St atus From the Main Menu, under Maintenance, se lect Connection to vi ew the screen in Figure 5-2 . Figure 5-2: Connection screen This screen shows detailed inform ation about the status of the connection to your cable service provider that [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Managing Your Network 5-5 Current System Tim e The date and time is acquired from your cable se rvice provider as part of the registration procedure. Configuring LAN IP Settings The LAN IP Setup menu allows configuration of LAN IP services such as the IP address of the gateway and [...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 5-6 Manag ing Your Netw ork DHCP By default, the gateway will function as a DHCP (D ynamic Host Configuration Protocol) server , allowing it to assign IP , DNS server , and default gateway addre sses to all computers connected to the router's LAN. The assig ned default gateway[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Managing Your Network 5-7 V iewing and Emailing Logged Information The gateway will log security-relate d events such as denied inco ming service requests, hacker probes, and administrator lo gins. If you enab led content filtering, the Logs page shows you when someone on your netw[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 5-8 Manag ing Your Netw ork Enabling Logs Event E-mail Notification In order to receive logs and alerts by e-mail, you must provide you r e- mail information in the E-Mail section of the Logs menu: • In the Contact Email Address, type the e-mail address to which the logs will be [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Managing Your Network 5-9 Running Diagnostic Utilities The CG814M Gate way has a diag nostics feature . Y ou can use the diagnostics me nu to test connectivity to PC us ing the Ping command: From the Main Menu of the browser interfa ce, under the Maintenance heading, select the Dia[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 5-10 Managing Your Networ k[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Troubleshooting 6-1 Chapter 6 T roubleshooting This chapter gives information about troubleshooting your CG814M W ireless Cable Modem Gateway. For the common problems listed, go to the section indicated. • Is the gateway on? • Have I connected the gateway correctly? Go to “Ba[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 6-2 Troubleshooting e. The Internet Link port LED is lit. If any of these conditions does not occur , refer to the appropriate following section. Power LED Not On If the Power and other LEDs are off wh en your gateway is turned on: • Make sure that the power cord is properly conn[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Troubleshooting 6-3 Cable Link LED Not On If the Cable Link LED does not lig ht when connected to your ca ble television cable, check the following: • Make sure that the coaxial cable connections ar e se cure at the gateway and at the wall jack. • Make sure that your cable inte[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 6-4 Troubleshooting • Make sure you are usin g the correct log in info rmation. The factory de fault login name is admin and the password is password . Make sure that CAPS LOCK is off when entering this information. If the gateway does not save changes you have made in the W eb C[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Troubleshooting 6-5 ping 192.168.0.1 3. Click on OK. Y ou should see a message like this one: Pinging <IP address> with 32 bytes o f data If the path is working, you see this message: Reply from < IP address >: bytes=32 time=NN ms TTL=xxx If the path is not working, you[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 6-6 Troubleshooting — Check that your PC has the IP address of your gateway listed as the default gateway . If the IP configuration of your PC is assigned by DHCP , this information will not be vi sible in your PC’ s Network Control Panel. V erify that the IP address of the gat[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Technical Specifications A-1 Appendix A T echnical S pecifications This appendix provides tech nical specifications for the CG814M W ireless Cable Modem Gateway. Network Protocol and St andards Compatibility Data and Routing Protocols: TCP/IP DHCP server and client DNS relay NA T ([...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway A-2 Technical S pecifications Local: 10BASE-T or 100BASE-Tx, RJ-45 USB 1.1 Function 802.1 1b W ireless Access Point Internet: DOCSIS 1.0, upgradeable to DOCSIS 1.1[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-1 Appendix B Networks, Routing, and Firewall Basics This chapter provides an overview of IP networks, routing, and firewalls. Related Publications As you read this document, you may be dire cte d to various RFC documents for further informat[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-2 Networks, Routing, and Firewall Basics What is a Router? A router is a device that forwards traffic between networks based on network layer information in the data and on routing tables main tained by the router . In these rou ting tables, a router builds up a logical picture o[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-3 The latter version is easier to remember and easier to enter into your computer . In addition, the 32 bits of the ad dress are subdivided into two part s. The firs t part of the address identifies the network, and the seco nd part identifi[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-4 Networks, Routing, and Firewall Basics • Class C Class C addresses can have 254 hosts on a netw ork. Class C addre sses use 24 bits for the network address and eight bits for the node. They are in this range: 192.0.1.x to 223.255.254.x. • Class D Class D addresses are used [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-5 As a shorter alternative to dotted-decimal notation, the netmask may also be expressed in terms of the number of ones from the left. This number is ap pended to the IP address, following a backward slash (/), as “/n.” In the example, t[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-6 Networks, Routing, and Firewall Basics Although the preceding example uses the entire third octet for a subnet address, note that you are not restricted to octet boundaries in subnetting. T o create more network numbers, you need only shift some bits from the host a ddress to t[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-7 NETGEAR strongly recommends that you configur e all hosts on a LAN se gment to use the same netmask for the following reasons: • So that hosts recognize local IP broadcast packets When a device broadcasts to its segment neighb ors, it us[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-8 Networks, Routing, and Firewall Basics Single IP Address Operation Using NA T In the past, if multiple PCs on a LAN needed to access the Internet simultaneously , you had to obtain a range of IP addresses from the ISP . This type of Internet account is more costly than a single[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-9 This scheme offers t he additional benefit of firewall -like protection because the internal LAN addresses are not available to the Internet thro ugh the translated connection. All incoming inquiries are filtered out by th e router . This [...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-10 Networks, Routing, and Firewall Ba sics Domain Name Server Many of the resources on the In ternet can be addressed by si mple descriptive names such as www .NETGEAR.com . This addressing is very helpful at th e application level , but the descriptive name must be translated to[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-11 What is a Firewall? A firewall is a device that protects one netw ork from another , while allowing communicat ion between the two. A firewall incorporates the functi ons of the NA T router , while adding features for dealing with a hacke[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-12 Networks, Routing, and Firewall Ba sics Wireless Networking The CG814M Gateway conforms to the Institute of Electrical and Electronics Engineers (IEEE) 802.1 1b standard for wireless L ANs (WLANs). On an 802.1 1b wireless link, data is encoded u sing direct-sequence spre ad-sp[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-13 In the infrastructure mode, the wireless access poin t converts airwave data into wired Etherne t data, acting as a bridge between the wired LAN and wireless clients. Co nnecting multiple Access Points via a wired Ethernet backbo ne can f[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-14 Networks, Routing, and Firewall Ba sics The 128-bit WEP data encryption meth od consists of 104 user -conf igurable bits. S imilar to the forty-bit WEP data encryption me thod, the remaining 24 bits are factory set and not user configurable. Some vendors allow passphrases to b[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Networks, Routing, and Firewall Basics B-15 Note: The av ailable ch annels suppo rted by the wireless products in various countries are dif ferent. The preferred channel separation betw een the chan nels in neighboring wireless networks is 25 MHz (5 channels). This means that you c[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway B-16 Networks, Routing, and Firewall Ba sics are exchanged at one of the two cable connector s. Crossover cables are often unmarked as such, and must be identified by comp aring the two connectors. Since the cable connectors are clear plastic, it is easy to place them side by side [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Preparing Your Netwo rk C-1 Appendix C Prep aring Y our Network This appendix describes how to prepare your ne twork to connect to the Internet through the CG814M W ireless Cable Modem Gateway and how to verify the readiness of bro adband Internet service from an Internet service p[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway C-2 Pre paring Your Network • All versions of UNIX or Linux include TCP/IP components. Follow the instructions provided with your operating system or networking so ftware to install TCP/IP on your computer . In your IP network, each PC and the gateway must be assigned a unique IP[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Preparing Your Netwo rk C-3 Y ou must have an Ethernet adapter , the TCP/IP protocol, and Client for Microsoft Networks. If you need to install a ne w adapter , follow these steps: a. Click the Add button. b. Select Adapter , and then click Add. c. Select the manufacturer and model[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway C-4 Pre paring Your Network If you need Client for Micro soft Networks: a. Click the Add button. b. Select Client, and then click Ad d. c. Select Microsoft. d. Select Client for Microsoft Networks, and then click OK. 3. Restart your PC for the changes to take ef fect. Enabling DHCP[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Preparing Your Netwo rk C-5 5. Uncheck all boxes in the LAN Internet Configuration screen and click Next. 6. Proceed to the end of th e W izard. V e rifying TCP/IP Properties After your PC is configured and has rebooted, you can check the TCP/IP co nfiguration using the utility win[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway C-6 Pre paring Your Network 5. V erify that ‘Client for Microsoft Networks’ and ‘Internet Protocol (TCP/IP)’ are present. If not, select Install and add them. 6. Select ‘Internet Protocol (TCP/IP)’, click Prop erties, and verify that “Obtain an IP address automaticall[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Preparing Your Netwo rk C-7 The TCP/IP Control Panel opens: 2. From the “Connect via” box, select your Macintosh’ s Ethernet interface. 3. From the “Configure” box, select Using DHCP Server . Y ou can leave the DH CP Client ID box empty . 4. Close the TCP/IP Control Panel[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway C-8 Pre paring Your Network V e rifying TCP/IP Properties for Macintosh Computers After your Macintosh is configured and has rebo oted, you can check the TC P/IP configuration by returning to the TCP/IP Control Panel. From th e Apple menu, select Control Panels, then TCP/IP . The p[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Preparing Your Netwo rk C-9 V erifying the Readiness of Y our Internet Account For broadband access to the Internet, you need to contract with an Internet service provider (ISP) for a single-user Internet access account using a cable modem. For a single-user Internet account, your [...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway C-10 Preparin g Your Network • An IP address and subnet mask • A gateway IP address, which is the address of the ISP’ s router • One or more domain name server (DNS) IP addresses • Host name and domain suf fix For example, your account’ s full server na mes may look lik[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Preparing Your Netwo rk C-11 If an IP address appears under Installed Gatewa ys, write down the address. This is the ISP’ s gateway address. Select the address and then click Remove to remove the gateway address. 6. Select the DNS Configuration tab. If any DNS server addresses ar[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway C-12 Preparin g Your Network Rest arting the Network Once you’ve set up your computers to work with the gateway, you must reset the network for the devices to be able to communicat e correctly . Restart a ny computer that is connected to the firewall. After configuring all of you[...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Glossary 1 Glossary 10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over twisted pair wiring. 100BASE-Tx IEEE 802.3 specification for 100 Mbps Et hernet over twisted pair wiring. 802.1 1 b IEEE specification for wireless networking at 1 1 Mbps using direct-sequence spread-sp[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 2 Glossary Gateway A local device, usually a router , that c onnects ho sts on a lo cal network to other networks. IETF Internet Engin eering T ask Force. An open international communi ty of network designers, operators, vendors, and researchers concerned with the evolution of the [...]

Reference Manual for the Mo del CG814M Wireless Cable Modem Gateway Glossary 3 NA T See Netw ork Address T ranslation. netmask A num ber that explains which p art of an IP address comp rises the network address and which part is the host address on that network. It can be expressed in dotted-decimal notation or as a number appended to the IP addres[...]

Reference Manual for the Model CG814M Wireless Cable M odem Gateway 4 Glossary VPN V irtual Private Network. A meth od for securely transporting data between two private networks by using a public ne twork such as the Internet as a connection. WA N See wide area network. WEP W ired Equi valent Privacy . WEP is a da ta encryption protocol for 802 .1[...]