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Reference Manual for the Model CG814W Wireless Cable Modem Gateway

B-18

Networks, Routing, and Firewall Basics

Wireless Channels

IEEE 802.11 wireless nodes communicate with each other using radio frequency signals in the
ISM (Industrial, Scientific, and Medical) band between 2.4 GHz and 2.5 GHz. Neighboring
channels are 5 MHz apart. However, due to spread spectrum effect of the signals, a node sending
signals using a particular channel will utilize frequency spectrum 12.5 MHz above and below the
center channel frequency. As a result, two separate wireless networks using neighboring channels
(for example, channel 1 and channel 2) in the same general vicinity will interfere with each other.
Applying two channels that allow the maximum channel separation will decrease the amount of
channel cross-talk, and provide a noticeable performance increase over networks with minimal
channel separation.

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Содержание CG814W

Страница 1: ...SM CG814WNA 0 January 2003 NETGEAR Inc 4500 Great America Parkway Santa Clara CA 95054 USA Phone 1 888 NETGEAR Reference Manual for the Model CG814W Wireless Cable Modem Gateway ...

Страница 2: ...esidential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can b...

Страница 3: ...rtain restrictions Please refer to the notes in the operating instructions Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and has been granted the right to test the series for compliance with the regulations Voluntary Control Council for Interference VCCI Statement This equipment is in the second category information equipment to be...

Страница 4: ...iv ...

Страница 5: ...Management 1 4 What s in the Box 1 5 The Gateway s Front Panel 1 5 The Gateway s Rear Panel 1 7 Chapter 2 Connecting the Gateway to the Internet 2 1 What You Will Need Before You Begin 2 1 Hardware Requirements 2 1 LAN Configuration Requirements 2 1 Internet Configuration Requirements 2 2 Where Do I Get the Internet Configuration Parameters 2 2 Record Your Internet Connection Information 2 3 Conne...

Страница 6: ...p A Default DMZ Host 4 10 Respond to Ping on Internet WAN Port 4 10 Chapter 5 Managing Your Network 5 1 Network Status Information 5 1 Viewing Gateway Status 5 1 Connection Status 5 3 Current System Time 5 3 Configuring LAN IP Settings 5 4 LAN IP Setup 5 4 Using the Gateway as a DHCP Server 5 5 DHCP Client Lease Info 5 6 Viewing and Emailing Logged Information 5 7 Enabling Logs Event E mail Notifi...

Страница 7: ...e Internet B 2 Netmask B 4 Subnet Addressing B 5 Private IP Addresses B 7 Single IP Address Operation Using NAT B 8 MAC Addresses and Address Resolution Protocol B 9 Related Documents B 9 Domain Name Server B 10 IP Configuration by DHCP B 10 Internet Security and Firewalls B 10 What is a Firewall B 11 Stateful Packet Inspection B 11 Denial of Service Attack B 11 Wireless Networking Overview B 12 I...

Страница 8: ...erify Windows Networking Components C 7 DHCP Configuration of TCP IP in Windows XP 2000 or NT4 C 8 DHCP Configuration of TCP IP in Windows XP C 8 DHCP Configuration of TCP IP in Windows 2000 C 11 DHCP Configuration of TCP IP in Windows NT4 C 14 Verifying TCP IP Properties for Windows XP 2000 and NT4 C 16 Configuring the Macintosh for TCP IP Networking C 17 MacOS 8 6 or 9 x C 17 MacOS X C 18 Verify...

Страница 9: ...ll and PC networking technologies tutorial information is provided in the Appendices Typographical Conventions This guide uses the following typographical conventions italics Media titles UNIX files commands URLs and directory names bold times roman User input Internet Protocol IP First time an abbreviated term is used courier font Screen text user typed command line entries Enter Named keys in te...

Страница 10: ...Web at www NETGEAR com The NETGEAR Web site includes an extensive knowledge base answers to frequently asked questions and a means for submitting technical questions online Note This format is used to highlight information of importance or special interest Warning This format is used to highlight information about the possibility of injury or equipment damage Danger This format is used to alert yo...

Страница 11: ... Point The CG814W Gateway is a complete security solution that protects your network from attacks and intrusions Unlike simple Internet sharing routers that rely on Network Address Translation NAT for security the CG814W Gateway uses Stateful Packet Inspection for Denial of Service DoS attack protection and intrusion detection The CG814W Gateway provides highly reliable Internet access for up to 2...

Страница 12: ...as blocked incoming traffic port scans attacks and administrator logins You can configure the gateway to email the log to you whenever a significant event occurs Content Filtering With its content filtering feature the CG814W Gateway prevents objectionable content from reaching your PCs The gateway allows you to control access to Internet content by screening for keywords within Web addresses You ...

Страница 13: ...stalling an Ethernet card Protocol Support The CG814W Gateway supports the Transmission Control Protocol Internet Protocol TCP IP Appendix B Networks Routing and Firewall Basics provides further information on TCP IP IP Address Sharing by NAT The CG814W Gateway allows several networked PCs to share an Internet account using only a single IP address which may be statically or dynamically assigned b...

Страница 14: ...Windows Macintosh or Linux A user friendly Setup Wizard is provided and online help documentation is built into the browser based Web Management Interface Diagnostic functions The gateway incorporates built in diagnostic functions such as Ping DNS lookup and remote reboot These functions allow you to test Internet connectivity and reboot the gateway You can use these diagnostic functions directly ...

Страница 15: ...ng or damaged contact your NETGEAR dealer Keep the carton including the original packing materials in case you need to return the product for repair The Gateway s Front Panel The front panel of the CG814W Gateway Figure 1 1 contains status LEDs Figure 1 1 CG814W Gateway Front Panel You can use some of the LEDs to verify connections Table 1 1 lists and describes each LED on the front panel of the C...

Страница 16: ...Traffic On Off Data is being transmitted or received on the cable interface The cable interface is idle Wireless On Blink Indicates that the wireless Access Point is operating normally Data is being transmitted or received on the wireless interface Local Local Area Network On Green Blink Green On Yellow Blink Yellow Off The Local port has detected link with a 100 Mbps device Data is being transmit...

Страница 17: ...power adapter input 802 11b Wireless antenna Factory Default Reset push button USB port for connecting the gateway to a local computer Four Ethernet RJ 45 ports for connecting the gateway to local computers Coaxial F type connector for connecting the gateway to your cable service provider ...

Страница 18: ...Reference Manual for the Model CG814W Wireless Cable Modem Gateway 1 8 Introduction ...

Страница 19: ...nt 3 The Internet Service Provider ISP configuration information for your cable modem account Hardware Requirements The CG814W Gateway connects to your LAN using either its twisted pair Ethernet USB or 802 11b wireless port To use the CG814W Gateway on your network each computer must have either an installed Ethernet Network Interface Card NIC USB Host port or 802 11b wireless adapter If the compu...

Страница 20: ...d on the bottom of your gateway or on the Basic Settings page The MAC Address of the PC that you use to access the internet There are several ways you can gather the required Internet connection information Your ISP should have provided you with all the information needed to connect to the Internet If you cannot locate this information you can ask your ISP to provide it or you can try one of the o...

Страница 21: ...ddress ______ ______ ______ ______ Subnet Mask ______ ______ ______ ______ Gateway IP Address ______ ______ ______ ______ ISP DNS Server Addresses If you were given DNS server addresses fill in the following Primary DNS Server IP Address ______ ______ ______ ______ Secondary DNS Server IP Address ______ ______ ______ ______ MAC Addresses of CG814W Gateway and PC If you have existing cable internet...

Страница 22: ...teway 1 Connect the Gateway a Turn off your computer b Using the coaxial cable provided by your cable company connect the CG814W Gateway cable port A to your cable line splitter or outlet Figure 2 1 Connect the gateway to the cable network c Connect the gateway to you computer If you will connect with the Ethernet cable follow the instructions below If you will connect with the USB cable skip to s...

Страница 23: ...connecting to a switch or hub That port will then configure itself to the correct configuration This feature also eliminates the need to worry about crossover cables as Auto Uplink will accommodate either type of cable to make the right connection d To connect your computer to the modem via USB involves installing the USB driver Insert the CD which came with your gateway into the CD drive of your ...

Страница 24: ...n do not run that software or cancel it if it starts automatically g Verify the following The power light is lit after turning on the gateway The cable link light is solid green indicating a link has been established to the cable network The local lights are lit for any connected computers 2 Log in to the Gateway Note To connect to the gateway your computer needs to be configured to obtain an IP a...

Страница 25: ...gure 2 4 Login window b For security reasons the gateway has its own user name and password When prompted enter admin for the user name and password for the password both in lower case letters c After logging in you will see the Basic Settings shown in Figure 2 5 below Note If you were unable to connect to the gateway please refer to Basic Functions on page 6 1 ...

Страница 26: ...to connect to the Internet Unless your ISP assigns your configuration automatically via DHCP you will need the ISP configuration parameters you recorded in Record Your Internet Connection Information on page 2 3 b Your current WAN IP address information is shown on this page If you have set your configuration for Dynamic IP below then an IP address information shown here is an indication that you ...

Страница 27: ...y is the ISP s router to which your gateway will connect A DNS server is a host on the Internet that translates Internet names such as www netgear com to numeric IP addresses Typically your ISP transfers the IP address of one or two DNS servers to your gateway during login If the ISP does not transfer an address you must obtain it from the ISP and enter it manually here If you enter an address her...

Страница 28: ...Reference Manual for the Model CG814W Wireless Cable Modem Gateway 2 10 Connecting the Gateway to the Internet ...

Страница 29: ...tworks Routing and Firewall Basics Implement Appropriate Security Unlike wired network data your wireless data transmissions can extend beyond your walls and can be received by anyone with a compatible adapter For this reason use the security features of your wireless equipment Restricting access by MAC address filtering adds an obstacle to unwanted users joining your network To hinder a determine...

Страница 30: ... placement of the wireless gateway For best results place your gateway Near the center of the area in which your PCs will operate In an elevated location such as a high shelf Away from potential sources of interference such as PCs microwaves and 2 4 GHz cordless phones Away from large metal surfaces Note Failure to follow these guidelines can result in significant performance degradation or inabil...

Страница 31: ...ttings To configure the Wireless interface of your gateway click on the Wireless Settings heading in the Setup section of the browser interface The Wireless Settings menu will appear as shown below Figure 3 1 Wireless Settings menu Wireless Network Settings In the Wireless Settings section are the following parameters ...

Страница 32: ...el unless you notice interference problems with another nearby access point Restricting Wireless Access by MAC Address By default any wireless PC that is configured with the correct SSID will be allowed access to your wireless network For increased security you can restrict access to the wireless network to only allow specific PCs based on their MAC addresses Check the Turn Access Control On box t...

Страница 33: ...to the Access List by either selecting form the list of Connected Wireless Devices or by manual entering MAC addresses To restrict access based on MAC addresses 1 For your convenience this menu displays a list of currently Connected Wireless Devices and their MAC addresses Select a device from the list that you want to allow to access your network 2 If the desired PC does not appear in the list yo...

Страница 34: ...cryption level Off no data encryption Open System 64 bit sometimes called 40 bit encryption 128 bit encryption Authentication Type Select the appropriate value Open System or Shared Key Check your wireless card s documentation to see what method to use Encryption WEP Key If WEP is enabled you can manually or automatically program the four data encryption keys These values must be identical on all ...

Страница 35: ... below to change the gateway s password and the amount of time for the administrator s login timeout Note The user name and password are not the same as any user name or password your may use to log in to your Internet connection NETGEAR recommends that you change this password to a more secure password The ideal password should contain no dictionary words from any language and should be a mixture...

Страница 36: ...og in again to continue the configuration If you have backed up the gateway settings previously you should do a new backup so that the saved settings file includes the new password Blocking Keywords Sites and Services The gateway provides a variety of options for blocking Internet based content and communications services With its content filtering feature the CG814W Gateway prevents objectionable...

Страница 37: ...trict access to Internet content based on functions such as web address keywords and web domains A domain name is the name of a particular web site For example for the address www NETGEAR com the domain name is NETGEAR com 1 Log in to the gateway at its default LAN address of http 192 168 0 1 with its default User Name of admin default password of password or using whatever Password and LAN addres...

Страница 38: ...s in the badstuff com site Up to 8 entries are supported in the Keyword list 6 To block access to the domains in the Domain List select Deny Domains To allow access to only the domains in the Domain List select Allow Domains If the domain goodstuff com is specified you will be able to access only sites on the goodstuff site 7 To delete a keyword or domain select it from the list click Remove Keywo...

Страница 39: ...from the LAN side to the outside You may define additional rules that will specify exceptions to the default rules By adding custom rules you can block or allow access based on the service or application source or destination IP addresses and time of day To configure outbound rules on the CG814W Gateway click the Port Blocking link on the Advanced section of the main menu Figure 4 4 Port Blocking ...

Страница 40: ...Port Forwarding Considerations for Port Forwarding If the IP address of the local server PC is assigned by DHCP it may change when the PC is rebooted To avoid this you can assign a static IP address to your server outside the range that is assigned by DHCP but in the same subnet as the rest of your LAN By default the IP addresses in the range of 192 168 0 2 through 192 168 0 9 are reserved for thi...

Страница 41: ...the predefined list you can add a custom service Enter the range of ports you would like to forward and select whether the ports are TCP UDP or Both 2 Enter the IP address of the computer on your network to which you would like to direct the inbound traffic 3 Click Add 4 To access the local computer from the Internet you must use the WAN address of your gateway which can be found on the Basic Sett...

Страница 42: ...by DHCP and is changed frequently Port Triggering opens in incoming port temporarily and can does not require the server on the internet to track your IP address if it is changed Port Triggering monitors outbound traffic When the gateway detects traffic on the specified outbound port it remembers the IP address of the computer that sent the data and triggers the incoming port Incoming traffic on t...

Страница 43: ...C example To configure Port Triggering 1 In the Trigger Range enter the outbound ports that will be monitored for activity This will be the trigger 2 In the Target Range enter the inbound ports that should be forwarded when the trigger occurs 3 Select the appropriate protocol TCP UDP or Both 4 Check the Enable box 5 Click Apply To clear a Port Triggering rule you can either remove the check from t...

Страница 44: ...rwarding or Port Triggering menu Instead of discarding this traffic you can have it forwarded to one computer on your network This computer is called the Default DMZ Host To assign a computer or server to be a DMZ Host from the Main Menu under Advanced select DMZ Host Enter the IP address of the computer you would like to assign as a DMZ Host and click Apply To disable the DMZ Host enter 0 and cli...

Страница 45: ... how to perform network management tasks with your CG814W Wireless Cable Modem Gateway Network Status Information The CG814W provides a variety of status and usage information which is discussed below Viewing Gateway Status From the Main Menu under Maintenance select Gateway Status to view the screen in Figure 5 1 Figure 5 1 Gateway Status screen ...

Страница 46: ...rovider Device MAC Address The MAC address of the router side of the gateway This is the equivalent of your PC when connected to a cable modem You can use the MAC Cloning feature to replace this MAC address with another address when sending packets to the WAN Cable Modem Serial Number The serial number of the gateway hardware CM Certificate If the Cable Modem certificate is Installed it is possibl...

Страница 47: ...s detailed information about the status of the connection to your cable service provider that can be used for troubleshooting The gateway goes through the following steps to be provisioned 1 Acquire and lock Downstream Channel 2 Acquire upstream parameters and range 3 Lock Upstream Channel 4 Acquire IP Address through DHCP Current System Time The date and time is acquired from your cable service p...

Страница 48: ...LAN IP Settings The LAN IP Setup menu allows configuration of LAN IP services such as the IP address of the gateway and DHCP These features can be found under the Advanced heading in the Main Menu in the LAN IP menu LAN IP Setup The LAN IP Setup menu is shown in Figure 5 3 0 Figure 5 3 LAN IP setup screen ...

Страница 49: ... DHCP Server By default the gateway will function as a DHCP Dynamic Host Configuration Protocol server allowing it to assign IP DNS server and default gateway addresses to all computers connected to the router s LAN The assigned default gateway address is the LAN address of the gateway IP addresses will be assigned to the attached PCs from a pool of addresses specified in this menu Each pool addre...

Страница 50: ... range you have defined Subnet Mask Gateway IP Address is the gateway s LAN IP address Primary DNS Server if you entered a Primary DNS address in the Basic Settings menu otherwise the gateway s LAN IP address Secondary DNS Server if you entered a Secondary DNS address in the Basic Settings menu DHCP Client Lease Info The DHCP Client Lease Info table lists information about each PC that has been as...

Страница 51: ...he logs will be sent Use a full e mail address for example ChrisXY myISP com In the SMTP Server Name box type the outgoing SMTP mail server of your ISP for example mail myISP com You may be able to find this information in the configuration menu of your e mail program If you leave this box blank no alerts or logs will be sent Check the E mail Alerts Enable box Click E mail Log to send the log imme...

Страница 52: ...and click Apply 2 The gateway will then reboot automatically After an erase the gateway s password will be password the LAN IP address will be 192 168 0 1 and the router s DHCP client will be enabled Note To restore the factory default configuration settings without knowing the login password or IP address you must use the Default Reset button on the rear panel of the gateway 1 Using a paper clip ...

Страница 53: ...ading select the Diagnostics menu shown in Figure 5 5 Figure 5 5 Diagnostics menu To perform a Ping test 1 In the Ping Target section enter the IP address of the PC you would like to ping 2 If you would like to specify additional details you can set the Ping Size No of Ping and Ping Interval 3 Click Start Test 4 Click REFRESH to see the results of the Ping test ...

Страница 54: ...Reference Manual for the Model CG814W Wireless Cable Modem Gateway 5 10 Managing Your Network ...

Страница 55: ...tion Interface on page 6 3 I ve configured the gateway but I can t access the Internet Go to Troubleshooting the ISP Connection on page 6 4 I can t remember the gateway s configuration password I want to clear the configuration and start over again Go to Erasing Configuration on page 5 8 Basic Functions After you turn on power to the gateway the following sequence of events should occur 1 When pow...

Страница 56: ...st LED Cycle the power to see if the gateway recovers and the LED goes off If all LEDs including the Test LED are still on one minute after power up clear the gateway s configuration to factory defaults This will set the gateway s IP address to 192 168 0 1 This procedure is explained in Erasing Configuration on page 5 8 If the error persists you might have a hardware problem and should contact tec...

Страница 57: ...he same subnet as the gateway If you are using the recommended addressing scheme your PC s address should be in the range of 192 168 0 10 to 192 168 0 254 Refer to Verifying TCP IP Properties on page C 6 or Configuring the Macintosh for TCP IP Networking on page C 17 to find your PC s IP address Follow the instructions in Appendix C to configure your PC Note If your PC s IP address is shown as 169...

Страница 58: ...ou gateway with your cable service provider This is described in Connecting the CG814W Gateway on page 2 4 Additionally your PC may not have the gateway configured as its TCP IP gateway If your PC obtains its information from the gateway by DHCP reboot the PC and verify the gateway address as described in DHCP Configuration of TCP IP in Windows 2000 on page C 11 Troubleshooting a TCP IP Network Us...

Страница 59: ...nding Link LEDs are on for your network interface card and for the hub ports if any that are connected to your workstation and gateway Wrong network configuration Verify that the Ethernet card driver software and TCP IP software are both installed and configured on your PC or workstation Verify that the IP address for your gateway and your workstation are correct and that the addresses are on the ...

Страница 60: ...P in Windows 2000 on page C 11 Check to see that the network address of your PC the portion of the IP address specified by the netmask is different from the network address of the remote device Check that your Cable Link LED is on If your ISP assigned a host name to your PC enter that host name as the Account Name in the Basic Settings menu Your ISP could be rejecting the Device MAC Address of you...

Страница 61: ...server and client DNS relay NAT many to one TFTP client VPN pass through IPSec L2TP Power Adapter North America input 120V 60 Hz input All regions output 12 V DC 1 25A output 20W maximum Physical Specifications Dimensions 255 by 169 by 34 mm 10 0 by 6 7 by 1 3 in Weight 0 54 kg 1 2 lb Environmental Specifications Operating temperature 32 140 F 0 to 40 C Operating humidity 90 maximum relative humid...

Страница 62: ...Manual for the Model CG814W Wireless Cable Modem Gateway A 2 Technical Specifications Local 10BASE T or 100BASE Tx RJ 45 USB 1 1 Function 802 11b Wireless Access Point Internet DOCSIS 1 0 upgradable to DOCSIS 1 1 ...

Страница 63: ...dard protocols and procedures for the Internet The documents are listed on the World Wide Web at www ietf org and are mirrored and indexed at many other sites worldwide Basic Router Concepts Large amounts of bandwidth can be provided easily and relatively inexpensively in a local area network LAN However providing high bandwidth between a local network and the Internet can be very expensive Becaus...

Страница 64: ...otocol RIP Using RIP routers periodically update one another and check for changes to add to the routing table The CG814W Gateway supports both the older RIP 1 and the newer RIP 2 protocols Among other improvements RIP 2 supports subnet and multicast protocols RIP is not required for most home applications IP Addresses and the Internet Because TCP IP networks are interconnected across the world ev...

Страница 65: ... type begins with a unique bit pattern which is used by the TCP IP software to identify the address class After the address class has been determined the software can correctly identify the host section of the address The follow figure shows the three main address classes including network and host sections of the address for each address type Figure 6 1 Three Main Address Classes The five address...

Страница 66: ...nge host address of all ones is not assigned but is used as the broadcast address for simultaneously sending a packet to all hosts with the same network address Netmask In each of the address classes previously described the size of the two parts network address and host address is implied by the class This partitioning scheme can also be expressed by a netmask associated with the IP address A net...

Страница 67: ...ress into smaller multiple physical networks known as subnetworks Some of the node numbers are used as a subnet number instead A Class B address gives us 16 bits of node numbers translating to 64 000 nodes Most organizations do not use 64 000 nodes so there are free bits that can be reassigned Subnet addressing makes use of those bits that are free as shown below Figure 6 2 Example of Subnetting a...

Страница 68: ...192 68 135 254 The following table lists the additional subnet mask bits in dotted decimal notation To use the table write down the original class netmask and replace the 0 value octets with the dotted decimal value of the additional subnet bits For example to partition your Class C network with subnet mask 255 255 255 0 into 16 subnets 4 bits the new subnet mask becomes 255 255 255 240 The follow...

Страница 69: ...s to the hosts without problems However the IANA has reserved the following three blocks of IP addresses specifically for private networks 10 0 0 0 10 255 255 255 172 16 0 0 172 31 255 255 192 168 0 0 192 168 255 255 NETGEAR recommends that you choose your private network number from this range The DHCP server of the CG814W Gateway is preconfigured to automatically assign private addresses Regardl...

Страница 70: ...networked PCs to share an Internet account using only a single IP address which may be statically or dynamically assigned by your ISP The router accomplishes this address sharing by translating the internal LAN IP addresses to a single address that is globally unique on the Internet The internal LAN IP addresses can be either private addresses or registered addresses For more information about IP ...

Страница 71: ...esolution Internet Protocol uses the Address Resolution Protocol ARP to resolve MAC addresses If a device sends data to another station on the network and the destination MAC address is not yet recorded ARP is used An ARP request is broadcast onto the network All stations on the network receive and read the request The destination IP address for the chosen station is included as part of the messag...

Страница 72: ...ateway address and one or more DNS server addresses As an alternative to manual configuration there is a method by which each PC on the network can automatically obtain this configuration information A device on the network may act as a Dynamic Host Configuration Protocol DHCP server The DHCP server stores a list or pool of IP addresses along with other information such as gateway and DNS addresse...

Страница 73: ...ng to protect your network from attacks and intrusions Since user level applications such as FTP and Web browsers can create complex patterns of network traffic it is necessary for the firewall to analyze groups of network connection states Using Stateful Packet Inspection an incoming packet is intercepted at the network layer and then analyzed for state related information associated with all net...

Страница 74: ...nteracting with wireless nodes via an antenna In the infrastructure mode the wireless access point converts airwave data into wired Ethernet data acting as a bridge between the wired LAN and wireless clients Connecting multiple Access Points via a wired Ethernet backbone can further extend the wireless network coverage As a mobile computing device moves out of the range of one access point it move...

Страница 75: ...types of authentication methods Open System and Shared Key With Open System authentication a wireless PC can join any network and receive any messages that are not encrypted With Shared Key authentication only those PCs that possess the correct authentication key can join the network By default IEEE 802 11 wireless devices operate in an Open System network Wired Equivalent Privacy WEP data encrypt...

Страница 76: ...th any available Access Point within range regardless of its SSID Shared Key Authentication requires that the station and the access point have the same WEP Key to authenticate These two authentication procedures are described below Open System Authentication The following steps occur when two devices use Open System Authentication 1 The station sends an authentication request to the access point ...

Страница 77: ...ccess point and the station share the same WEP Key and the access point authenticates the station 5 The station connects to the network If the decrypted text does not match the original challenge text i e the access point and station do not share the same WEP Key then the access point will refuse to authenticate the station and the station will be unable to communicate with either the 802 11b netw...

Страница 78: ...02 11b network uses Shared Key Authentication Note Some 802 11b access points also support Use WEP for Authentication Only Shared Key Authentication without data encryption Key Size The IEEE 802 11b standard supports two types of WEP encryption 40 bit and 128 bit The 64 bit WEP data encryption method allows for a five character 40 bit input Additionally 24 factory set bits are added to the forty b...

Страница 79: ...ations match WEP Configuration Options The WEP settings must match on all 802 11b devices that are within the same wireless network as identified by the SSID In general if your mobile clients will roam between access points then all of the 802 11b access points and all of the 802 11b client adapters on the network must have the same WEP settings Note Whatever keys you enter for an AP you must also...

Страница 80: ... spread spectrum effect of the signals a node sending signals using a particular channel will utilize frequency spectrum 12 5 MHz above and below the center channel frequency As a result two separate wireless networks using neighboring channels for example channel 1 and channel 2 in the same general vicinity will interfere with each other Applying two channels that allow the maximum channel separa...

Страница 81: ...ireless channels in the United States It is recommended that you start using channel 1 and grow to use channel 6 and 11 when necessary as these three channels do not overlap Table 6 1 802 11 Radio Frequency Channels Channel Center Frequency Frequency Spread 1 2412 MHz 2399 5 MHz 2424 5 MHz 2 2417 MHz 2404 5 MHz 2429 5 MHz 3 2422 MHz 2409 5 MHz 2434 5 MHz 4 2427 MHz 2414 5 MHz 2439 5 MHz 5 2432 MHz...

Страница 82: ... must be exchanged with the receive pair This exchange is done by one of two mechanisms Most hubs provide an Uplink switch which will exchange the pairs on one port allowing that port to be connected to another hub using a normal Ethernet cable The second method is to use a crossover cable which is a special cable in which the transmit and receive pairs are exchanged at one of the two cable connec...

Страница 83: ... will often tolerate low quality cables but at 100 Mbits second 10BASE Tx the cable must be rated as Category 5 or Cat 5 by the Electronic Industry Association EIA This rating will be printed on the cable jacket A Category 5 cable will meet specified requirements regarding loss and crosstalk In addition there are restrictions on maximum cable length for both 10 and 100 Mbits second networks ...

Страница 84: ...Reference Manual for the Model CG814W Wireless Cable Modem Gateway B 22 Networks Routing and Firewall Basics ...

Страница 85: ...tware components for establishing a TCP IP network Windows 3 1 does not include a TCP IP component You need to purchase a third party TCP IP application package such as NetManage Chameleon Macintosh Operating System 7 or later includes the software components for establishing a TCP IP network All versions of UNIX or Linux include TCP IP components Follow the instructions provided with your operati...

Страница 86: ...ay assigns the following TCP IP configuration information automatically when the PCs are rebooted PC or workstation IP addresses 192 168 0 2 through 192 168 0 254 Subnet mask 255 255 255 0 Gateway address the gateway 192 168 0 1 These addresses are part of the IETF designated private address range for use in private networks Configuring Windows 95 98 and Me for TCP IP Networking As part of the PC ...

Страница 87: ...ps a Click the Add button b Select Adapter and then click Add c Select the manufacturer and model of your Ethernet adapter and then click OK If you need TCP IP a Click the Add button b Select Protocol and then click Add c Select Microsoft d Select TCP IP and then click OK Note It is not necessary to remove any other network components shown in the Network window in order to install the adapter TCP...

Страница 88: ...gure this information is to allow the PC to obtain the information from a DHCP server in the network You will find there are many similarities in the procedures for different Windows systems when using DHCP to configure TCP IP The following steps will walk you through the configuration process for each of these versions of Windows Locate your Network Neighborhood icon If the Network Neighborhood i...

Страница 89: ...aring Your Network C 5 Verify the following settings as shown Client for Microsoft Network exists Ethernet adapter is present TCP IP is present Primary Network Logon is set to Windows logon Click on the Properties button The following TCP IP Properties window will display ...

Страница 90: ...he LAN Internet Configuration screen and click Next 6 Proceed to the end of the Wizard Verifying TCP IP Properties After your PC is configured and has rebooted you can check the TCP IP configuration using the utility winipcfg exe 1 On the Windows taskbar click the Start button and then click Run By default the IP Address tab is open on this window Verify the following Obtain an IP address automati...

Страница 91: ...cess you may need to install and configure TCP IP on each networked PC Before starting locate your Windows CD you may need to insert it during the TCP IP installation process Install or Verify Windows Networking Components To install or verify the necessary components for IP networking 1 On the Windows taskbar click the Start button point to Settings and then click Control Panel 2 Double click the...

Страница 92: ...ures for different Windows systems when using DHCP to configure TCP IP The following steps will walk you through the configuration process for each of these versions of Windows DHCP Configuration of TCP IP in Windows XP Locate your Network Neighborhood icon Select Control Panel from the Windows XP new Start Menu Select the Network Connections icon on the Control Panel This will take you to the nex...

Страница 93: ...set up on the PC located to the right of the window Right click on the Connection with the wireless icon and choose Status Now you should be at the Local Area Network Connection Status window This box displays the connection status duration speed and activity statistics Administrator logon access rights are needed to use this window Click the Properties button to view details about the connection ...

Страница 94: ...for the Model CG814W Wireless Cable Modem Gateway C 10 Preparing Your Network The TCP IP details are presented on the Support tab page Select Internet Protocol and click Properties to view the configuration information ...

Страница 95: ...here are problems you may need to know how to do it manually Remember Cox only sets up TCP IP dynamically i e it uses DHCP to obtain TCP IP settings Following are the steps to configure TCP IP with DHCP for Windows 2000 Verify that the Obtain an IP address automatically radio button is selected Verify that Obtain DNS server address automatically radio button is selected Click the OK button This co...

Страница 96: ... Connections Right click on Local Area Connection and select Properties The Local Area Connection Properties dialog box appears Verify that you have the correct Ethernet card selected in the Connect using box Verify that at least the following two items are displayed and selected in the box of Components checked are used by this connection Client for Microsoft Networks and Internet Protocol TCP IP...

Страница 97: ...rnet Protocol TCP IP Properties dialogue box Verify that Obtain an IP address automatically is selected Obtain DNS server address automatically is selected Click OK to return to Local Area Connection Properties Click OK again to complete the configuration process for Windows 2000 Restart the PC Repeat these steps for each PC with this version of Windows on your network ...

Страница 98: ...or Windows NT 4 0 Again remember Cox only sets up TCP IP dynamically i e it uses DHCP to obtain TCP IP settings Following are the procedures you use to configure TCP IP with DHCP in Windows NT 4 0 Choose Settings from the Start Menu and then select Control Panel This will display Control Panel window Double click the Network icon in the Control Panel window The Network panel will display Select th...

Страница 99: ...Reference Manual for the Model CG814W Wireless Cable Modem Gateway Preparing Your Network C 15 Highlight the TCP IP Protocol in the Network Protocols box and click on the Properties button ...

Страница 100: ...ration information will be listed and should match the values below if you are using the default TCP IP settings that NETGEAR recommends for connecting through a router or gateway The IP address is between 192 168 0 2 and 192 168 0 254 The subnet mask is 255 255 255 0 The TCP IP Properties dialog box now displays Click the IP Address tab Select the radio button marked Obtain an IP address from a D...

Страница 101: ...y installed on the Macintosh On each networked Macintosh you will need to configure TCP IP to use DHCP MacOS 8 6 or 9 x 1 From the Apple menu select Control Panels then TCP IP 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 You can leave the DHCP Client ID box empty 4 Close the TCP IP Control Pan...

Страница 102: ... and has rebooted you can check the TCP IP configuration by returning to the TCP IP Control Panel From the Apple menu select Control Panels then TCP IP The panel is updated to show your settings which should match the values below if you are using the default TCP IP settings that NETGEAR recommends The IP Address is between 192 168 0 2 and 192 168 0 254 The Subnet mask is 255 255 255 0 The Router ...

Страница 103: ...net port is connected to the broadband modem the gateway appears to be a single PC to the ISP The gateway then allows the PCs on the local network to masquerade as the single PC to access the Internet through the broadband modem The method used by the gateway to accomplish this is called Network Address Translation NAT or IP masquerading Are Login Protocols Used Some ISPs require a special login p...

Страница 104: ...hese procedures are described next Obtaining ISP Configuration Information for Windows Computers As mentioned above you may need to collect configuration information from your PC so that you can use this information when you configure the CG814W Gateway Following this procedure is only necessary when your ISP does not dynamically supply the account information To get the information you need to co...

Страница 105: ... Macintosh so that you can use this information when you configure the CG814W Gateway Following this procedure is only necessary when your ISP does not dynamically supply the account information To get the information you need to configure the gateway for Internet access 1 From the Apple menu select Control Panels then TCP IP The TCP IP Control Panel opens which displays a list of configuration se...

Страница 106: ...to work with the gateway you must reset the network for the devices to be able to communicate correctly Restart any computer that is connected to the firewall After configuring all of your computers for TCP IP networking and restarting them and connecting them to the local network of your CG814W Gateway you are ready to access and configure the gateway ...

Страница 107: ...dress or group of addresses on the Internet Domain names are of the form of a registered entity name plus one of a number of predefined top level suffixes such as com edu uk etc For example in the address mail NETGEAR com mail is a server name and NETGEAR com is the domain DOCSIS Data Over Cable Service Interface Specification Defines interface requirements for cable modems involved in high speed ...

Страница 108: ...Internet Protocol Security IPSec is a series of guidelines for securing private information transmitted over public networks IPSec is a VPN method providing a higher level of security than PPTP ISP Internet service provider LAN See local area network local area network LAN A communications network serving users within a limited area such as one floor of a building A LAN typically connects multiple...

Страница 109: ...int Tunneling Protocol A method for establishing a virtual private network VPN by embedding Microsoft s network protocol into Internet packets Point to Point Protocol PPP A protocol allowing a computer using TCP IP to connect directly to the Internet RFC Request For Comment Refers to documents published by the Internet Engineering Task Force IETF proposing standard protocols and procedures for the...

Страница 110: ...twork are configured with a 64 bit or 128 bit Shared Key for data encryption wide area network WAN A long distance link used to extend or connect remotely located local area networks The Internet is a large WAN Windows Internet Naming Service WINS Windows Internet Naming Service is a server process for resolving Windows based computer names to IP addresses If a remote network contains a WINS serve...

Страница 111: ...ASUS WLAN mini PCI card WL 120 User Manual ...

Страница 112: ...SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT Product warranty or service will not be extended if 1 the product is re paired modified or altered unless such repair modification of alteration is authorized in writing by ASUS or 2 the serial number of the product is defaced or missing Products and corporate names appearing in this manual may or may not be registered tradema...

Страница 113: ... ASUS COMPUTER INTERNATIONAL America Address 44370 Nobel Drive Fremont CA 94538 USA General Fax 1 510 608 4555 General Email tmd1 asus com Technical Support Support Fax 1 510 608 4555 General Support 1 502 933 8713 Web Site www asus com Support Email tsd asus com ASUS COMPUTER GmbH Germany Austria Address Harkortstr 25 40880 Ratingen BRD Germany General Fax 49 2102 442066 General Email sales asusc...

Страница 114: ...when you are enjoying the wireless link Verifying the TCP IP Protocol Windows 98 Me Right click My Network Place on the desktop and select properties Scroll down and look for TCP IP ASUS 802 11b Network Adap ter Make sure that the TCP IP protocal parameters IP adress gate way and subnet mask are set correctly Windows 2K XP Open the Control Panelthrough the Start menu Double click Network Connectio...

Страница 115: ... PCI card utilities Refer to the User s manual for detailed information 1 Insert the ASUS WLAN mini PCI card support CD and an autorun menu will appear If your autorun is disabled double click SETUP EXE in the root directory of the support CD 2 From the autorun menu click Install ASUS WLAN mini PCI card Utilities 3 Follow the on screen instructions to complete the installation ...

Страница 116: ... Wireless Settings Allows users to control the ASUS WLAN mini PCI card Mobile Manager A convenient tool to setup and manage network location settings Site Monitor Measures the signal to noise SNR values of all wire less networks This tool is used for determining the best placement of Access Points to provide the most efficient coverage in a wireless net work Live Update Provides automatic driver a...

Страница 117: ...buttons to decide your Windows XP wireless net working environment Only use XP wireless function Only use Windows XP wireless network settings to configure the ASUS WLAN mini PCI card Only useASUS utilities and disable XPwireless function Only useASUS WALN mini PCI card utilities to configure the ASUS mini PCI card You can return to the Wireless Option setting at any time by left clicking the cont...

Страница 118: ...ntrol Center manually Click the Windows Start button select Programs select ASUS Util ity select WLAN Card and click ASUS WLAN Control Center or Double click the Control Center icon on the desktop Using the Control Center Taskbar 1 The Control Center Taskbar menu display the following information The link quality of the ASUS WLAN mini PCI card Excellent Good Fair Poor Not Linked Whether the ASUS W...

Страница 119: ...ndows Exit Closes the Control Center program Wireless Status Icons on the taskbar Excellent link quality and connected to Internet Infrastructure Good link quality and connected to Internet Infrastructure Fair link quality and connected to Internet Infrastructure Poor link quality and connected to Internet Infrastructure Not linked but connected to Internet Infrastructure Excellent link quality bu...

Страница 120: ...hat allows you to control your ASUS WLAN mini PCI card Use Wireless Settings to View or Modify the con figuration settings and monitor the operational status of your PC Card Once Wireless Settings is launched you can see the tabbed property sheet This property sheet is composed of tabbed pages each with its own group of feature specific settings Starting Wireless Settings Open the Windows Control ...

Страница 121: ...rmation about theASUS WLAN mini PCI card from the general menu These fields are blank if the ASUS WLAN mini PCI card does not exist More than one ASUS WLAN Card If you have more than one ASUS WLAN Card You will be given a device selection window when you launch the Wireless Settings utility ...

Страница 122: ...ID that the ASUS WLAN mini PCI card is currently using MAC address Indicates the hardware address of the ASUS WLAN mini PCI card MAC address is a unique identifier for networking devices typically written as twelve hexadecimal digits 0 through 9 and A through F six hexadecimal numbers separated by colons i e 00 01 24 F0 05 C0 This parameter is read only and unique Current Channel Shows the radio c...

Страница 123: ...ds in this window display either a 0 or Not Applicable Click this button again to turn the radio back ON Rescan Force the radio to rescan all available channels If your link qual ity or signal strength is poor rescanning can be used to push the radio OFF a weak Access Point and search for a better link with anotherAccess Point This function will take some time Change SSID Click on this to set the ...

Страница 124: ...ransmitted Thenumberofframesthatwerenotsuccessfullytransmitted Received The number of frames that were not successfully received Connection Quality Link Quality Reflects the quality level related to the Access Point the stationiscurrentlyconnectedto Ratingsare Excellent Good Fair andPoor Signal Strength Reflects the signal level related to the Access Point the stationiscurrentlyconnectedto Ratings...

Страница 125: ...splay all the current TCP IP configuration values in cluding the IP address subnet mask default gateway and Windows Inter net Naming Service WINS and DNS configuration Button IP Release Releases the DHCP IP address for the ASUS WLAN mini PCI card IP Renew Renews the DHCP IP address for the ASUS WLAN mini PCI card NOTE The IP Release and IP Renew buttons can only be used on the ASUS WLAN mini PCI c...

Страница 126: ... tion with an Access Point Your computer is able to access wireless LAN and wired LAN Ethernet via an associated access point The Channel field turns to Auto when Infrastructure is selected Ad Hoc Select the Ad Hoc mode to communicate directly with each other without using an Access Point An Ad Hoc network is typically formed quickly and easily without pre planning For example share meeting notes ...

Страница 127: ...ect the correct frequency channel required to communicate with an Access Point this parameter will be fixed in Auto and cannot be changed In an Ad Hoc network you can decide the channel number for the ASUS WLAN mini PCI card Any ASUS WLAN mini PCI card can communicate in the same network if each has the same frequency channel setting The radio channels you may use depend on the regulations in your...

Страница 128: ...e Chapter 3 Other WEP Click on this to show the Encryption page Advanced Click on this to show the Advanced tab In most cases the default values do not have to be changed Troubleshooting Click on this to show the Troubleshooting utility ...

Страница 129: ...process can scramble frame bits to avoid disclosure to others Data encryption WEP enabled This option allows you to enable or disable the Wired Equivalent Privacy WEP function If this check box is selected a WEP Key is used to en crypt your data before it is transmitted over the air If you enable WEP encryption you will only be able to communicate with wireless devices that use the same WEP keys W...

Страница 130: ...ers or symbols in the Passphrase column then the Wireless Settings Utility uses an algorithm to generate four WEP Keys for encryption NOTE This function eases users from having to remember their passwords and is compatible to some existing WLAN utilities but this is not very secure Manual Assignment is more secure Default Key The Default Key field lets you specify which of the four encryption keys...

Страница 131: ...user control This together makes 64 bits 40 24 Some vendors refer to this level of WEP as 40 bits and others refer to this as 64 bits ASUS WLAN card products use the term 64 bits when referring to this lower level of encryption Second 104 bit WEP and 128 bit WEP are the same encryption method and can interoperate in the wireless network This higher level of WEP encryption uses a 104 bit 26 Hex cha...

Страница 132: ... RTS threshold ranges from 0 to 2346 in 64 steps Fragmentation Threshold Define the number of bytes used for fragmentation boundary If the length of the data unit exceedsthis parameter it will be divided into smaller frag ments for transmission Each of the fragments is sent independently If there is a significant interference present set the fragment size smaller Otherwise set the fragment size la...

Страница 133: ...ot Open System A null authentication algorithm A station can authenticate with any other station or Access Point and without checking any WEP Key even if one exists Share Key In a Share Key Authentication system four step exchange of frames is required to validate that the station is using the same WEP Key as the Access Point Using this Authentication mechanism requires imple mentation of the WEP ...

Страница 134: ...d to The value is then normalized to a dBm value N dBm Noise field to view average noise level statistics and Rela tive Signal Strength Information RSSI This information is helpful in determining which network you should be associated to The value is then normalized to a dBm value Type View wireless network status information the value is either AP infrastructure or STA Ad Hoc WEP View wireless ne...

Страница 135: ...card Reference Chapter 3 4 8 About Version Info Tab Click about to view version information The version under the copyright is the utility version The version information field includes driver hard ware and firmware versions ...

Страница 136: ...tion settings you will be prompted to do so 4 9 Link Status ASUS WLAN mini PCI card connection quality icon appears on the left of the ASUS WLAN Card Settings Use the icon to view the current signal quality of the adapter Excellent Link Quality Infrastructure Good Link Quality Infrastructure Fair Link Quality Infrastructure Poor Link Quality Infrastructure Not linked Infrastructure Linked Ad Hoc N...

Страница 137: ...anager Using Mobile Manager Quick Guide 1 The first time you launch the Mobile Manager utility it will automati cally generate configurations that stores the current settings of all in stalled network devices in your system 2 Change the name of the configuration to a descriptive name like Work Meeting Room or Home ADSL 3 On the File menu click New Configuration the New Configuration Wizard dialog ...

Страница 138: ... It allows quick ac cess to some of the most useful features of Mobile Manager The commands provided by the toolbar buttons are also available from the pull down menu File Menu New Configuration Select New Configuration in the File menu to open a New Configuration Wizard dialog Use the New Configu ration Wizard dialog to create a new configuration See Using New Configuration Wizard for details on ...

Страница 139: ... your computer but Windows 98 and ME usually will require a restart Edit Menu All these commands are also available from the context menu that appears when you right click with a configuration in the Mobile Manager window Edit Configuration Select Edit Configuration in the Edit menu to open an Edit Configuration dialog to edit selected configuration items See Using Edit Configuration for details o...

Страница 140: ... right information for Mobile Manager Click on the logo to connect to ASUS website View Menu Large Icons Displays large icons for each configuration Small Icons Displays small icons for each configuration List Shows the configuration names in a list Details The Detailed view expands this list to include information about the configurations The information includes configuration name type and descr...

Страница 141: ...following On the File menu click New Configuration or Double click New Configuration on the Main window Then the New Configuration Wizard dialog starts 2 Choose the type of configuration that you want to create and click Next Wireless Local Area Network Configuration You must have an ASUS WLAN mini PCI card installed in your PC WiredLocalAreaNetworkConfiguration YoumusthaveaNIC LAN card other than...

Страница 142: ...uration Sharing settings for Wireless Wired Dialup Configuration See Using Edit Configuration for detailed information on each 5 Enter the appropriate information in the wizard After specifying the appropriate information on each page click Next to continue 6 On the final window of the New Configuration Wizard you will see a Finish button If you do not want to use this new configuration now click ...

Страница 143: ...e JohnDoe Workgroup Type an existing workgroup name or create a new workgroup by typing a new name that contains up to 15 characters Use it to identify your computer group that you belong to Computer Description This information is displayed as a comment next to the computer name when the computer is seen in Details view select from the Windows pull down menu Use it to describe your computer for e...

Страница 144: ...connect to any IEEE 802 11 Infrastructure Network it can find Channel Using the Channel filed to select the radio channel for PC Card In infra structure network your PC Card will automatically select the correct fre quency channel required to communicate with an Access Point this param eter will be fixed in Auto and can t change it In an Ad Hoc Network you can decide channel number for the PC Card...

Страница 145: ...IP settings include five tabs Device IPAddress Gateway DNS and WINS Device Choose the network adapter that you want to use for this configuration IP Address Obtain an IP address from a DHCP server Dynamic host configu ration protocol DHCP server assigns IP addresses automatically within a specified range to devices Specify an IP address Ask your network administrator for the IP address and subnet ...

Страница 146: ...main Enter the TCP IP domain name for your network The full domain name consists of one or more names that are separated by dots for example asus com DNS Server Search Order Specify the DNS Servers in the desired order to search for DNS information Domain Suffix Search Order Add any domain suffixes that may be valid attached to the end of Internet domain name WINS Specify the WINS server There can...

Страница 147: ...code telephone number and country code for this connec tion Clear the Use area code and Dialing Properties checkbox if you want to ignore area code and dialing settings Server Type Type of Dial Up Server Select the server type for this connection Advanced options Select Log on to network checkbox to specify that Dial Up Networking will attempt to log on to the network you are connecting to using t...

Страница 148: ...ss from a ppp server If the ppp server does not offer an IP address the IP address specified for TCP IP Dial Up Adapter in the Network dialog box is used Specify an IP address Provides a space for you to type the preferred IP address for this connection Dial Up Networking tries to use this address first Server assigned name server addresses Specifies whether Dial Up Networking accepts a DNS and WI...

Страница 149: ...ou want to connect to a computer on your Intranet make sure you type its address in this box You can use wild cards to match domain and host names or addresses for example company com 192 72 111 Bypass proxy server for local addresses Specifies whether you want to use the proxy server for all local Intranet addresses You might be able to gain access to local addresses easier and faster if you do n...

Страница 150: ...ing Site Monitor Click the Windows Start button select Programs select ASUS Util ity select WLAN Card and then click Site Monitor or Right click the Control Center icon on the Windows taskbar and then click Site Monitor 6 2 Main Screen Measures the signal to noise SNR values of all available wireless net works Some Access Points can disable broadcasting SSID to hide them selves from Site Survey or...

Страница 151: ...cation Quality of the Basic Service Set to which the station is currently connected to Signal Level Specifies the Average Signal Level of the Basic Service Set to which the station is currently connected to Noise Level Specifies theAverage Noise Level of the Frequency Chan nel currently used for communications Throughput This sends a specified number of data packets to the re mote host and calcula...

Страница 152: ... root directory of your CD ROM drive When the Main menu appears click Run Live Update 2 Select an update method from the pull down menu Update Firmware Driver from the Internet Lets you update the ASUSWLANmini PCIcard s firmware or driver from the Internet The updating running the flash utility or the installation program will be done automatically Update Firmware Driver from the Disk Lets you spe...

Страница 153: ...ry When Live Update starts the firmware upgrade a warning message will tell you that incorrect firmware upgrades may cause your ASUS WLAN mini PCI card to malfunction You can cancel the up date process at this point If you continue a message will tell you that the update process has started Do not turn OFF your computer until the upgrade has completed The upgrade will take approximately 30 sec ond...

Страница 154: ...nal strength Signal strength is represented by green bars with 5 bars meaning excellent signal and 1 bar meaning poor signal 4 The Wireless Networks page will show Available networks and Preferred networks Use the Add button to add the SSID of available networks and set the connection preference order with the Move up and Move down buttons The radio tower with a signal icon identifies the currentl...

Страница 155: ...ter 3 5 The Authentication page allows you to add security settings Read Windows help for more information 6 The Advanced page allows you to set firewall and sharing Read Windows help for more information 8 Windows XP Wireless Properties Cont ...

Страница 156: ... yellow question mark in Device Manager in front of ASUS 802 11b Network Adapter To resolve the problem you should update reinstall the ASUS WLAN mini PCI card driver In Device Manager right click ASUS 802 11b Network Adapter select Properties and select Driver tab Click on Up date Driver button then follow the Update Device Driver Wizard to complete the driver installation In addition you may be ...

Страница 157: ...wave ovens and large metal objects Second is the distance decrease the distance between your ASUS WLAN mini PCI card and the Access Point or station or another ASUS WLAN mini PCI card The TCP IP protocol did not bind to the WLAN mini PCI Card This will occur when the computer already has six TCP IP bindings in Windows 98 or ten bindings in Windows Me These limits are imposed by the Microsoft opera...

Страница 158: ...l data units that may be used simultaneously in the same volume of space with other instances of medium use on other channels by other instances of the same physical layer with an acceptably low frame error ratio due to mutual in terference Extended Service Set ESS A set of one or more interconnected basic service set BSSs and integrated local area networks LANs can be configured as an Extended Se...

Страница 159: ... In this environment the access point not only provides communication with the wired network but also mediates wireless network traffic in the immediate neighborhood IP Internet Protocol The TCP IP standard protocol that defines the IP datagram as the unit of information passed across an Internet and provides the basis for connectionless packet delivery service IP includes the ICMP control and err...

Страница 160: ... usu ally includes routing information data and sometimes error detection in formation PCMCIA Personal Computer Memory Card International Association The Personal Computer Memory Card InternationalAssociation PCMCIA develops standards for PC cards formerly known as PCMCIAcards These cards are available in three types and are have about the same length and width as credit cards However the differen...

Страница 161: ...ontaining IEEE 802 11 wireless medium access conformity TCP Transmission Control Protocol The standard transport level protocol that provides the full duplex stream service on which many application protocols depend TCP allows a pro cess or one machine to send a stream of data to a process on another Soft ware implementing TCP usually resides in the operating system and uses the IP to transmit inf...

Страница 162: ...ore of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help WARNING The use of a shielded type power cord is required in order to meet FCC emission limits an...

Страница 163: ...r body Use on the supplied antenna Unauthorized antenna modification or attachments could damage the transmitter and may violate FCC regulations Installation and use of this Wireless LAN device must be in strict accor dance with the instructions included in the user documentation provided with the product Any changes or modifications including the antennas made to this device that are not expressl...

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