3Com OfficeConnect 3C857 manuale d’uso

http://www.3com.com/ Part No. DUA0085-5AAA04 Published Oct ober 2002 Of ficeConnect ® Cable/DSL Gateway W ir eless Cable/DSL Gateway User Guide 3C857 3CRWE52 196 (3CRWE52196 Only)[...]

3Com Corporati on 5400 Bayfront Plaza Santa Clara, Californ ia 95052-8145 Copyright © 2002, 3Com T echnologies. All righ ts reserv ed. No part of t his documentation may be r epro duced in any form or by any means or us ed to make any derivative work (such as translati on, transformation , or adaptation) without writt en permission from 3Com T ech[...]

C ONTENTS A BOUT T HIS G UIDE Naming Convention 7 Conventions 8 Feedback about this User Guide 8 Related Documen tation 9 Produc t Registration 9 1 I NTR ODUCING THE G ATEWAY OfficeConnect Cable/DSL Gateway and Wireless Cable/DSL Gateway 11 Gateway Advantages 13 Package Contents 13 Minimum System and Co mponen t Requirements 14 Fr ont Panel 14 Rear[...]

W indow s 95/98/ME 27 Macintosh 27 Disabling PPPoE and PP TP Client Software 28 Disabling W eb Pr oxy 28 4 R UNNING THE S ETUP W IZARD Accessing the W izard 29 Password 32 Ti me Zo n e 3 2 W AN Settings 33 LAN Settings 38 DHCP 38 W ireless Settings 39 Summary 40 5 G ATEWAY C ONFIGURATION Navigating Thr ough the Gate way Configuration Pag es 41 Main[...]

PC Privileges 65 Security 67 System T ools 69 Restart 69 Time Zone 69 Configuration 70 Upgrade 71 Status and Logs 72 Status 73 Logs 73 Support 73 6 T R OUBLESHOOTING Basic Connection Checks 75 Brow sing to the Gateway Configuration Screens 75 Connecting to the Internet 76 Forgotten Passwor d and Reset to Factory Defaults 76 W ireless Networking 77 [...]

C T ECHNICAL S PECIFICATIONS D S AFETY I NFORMATION E E ND U SER S OFTWARE L ICENCE A GR EEMENT F ISP I NFORMATION G LOSSARY I NDEX R EGULATORY N OTICES F OR THE C ABLE /DSL G ATEWAY R EGULATORY N OTICES FOR THE W IRELESS C ABLE /DSL G ATEWAY[...]

A BOUT T HIS G UIDE This guide describes how to install an d configure the Of ficeConnect Cable/DSL Gateway (3C857) and the OfficeConnect Wireless Cable/DSL Gateway (3CRWE52 196). All procedur es in this guide apply to b oth Gateways except when stated. This guide is inten ded for use by those responsible for installing and setting up network equip[...]

8 A BOUT T HIS G UIDE Conventions Ta b l e 1 and Ta b l e 2 list conventions that are used throughout this guide. Feedback about this User Guide Y our suggestions are ve ry important to us. Th ey will help make our documentation more useful to you. Please e-mail comments about this document to 3Com at: pddtechpubs_comments@3com.com Please include t[...]

Conventions 9 Exampl e: ■ Offi ceConnect Cable/DSL Gateway and W ireless Cable/DSL Gateway User Guide ■ Part Number DUA0085-5AAA04 ■ Page 24 Do not use this e-mail address for technical support questions. For information about contact ing T e chni cal Support, please refer to the Support and Safety Information sheet. Related Documentation In [...]

10 A BOUT T HIS G UIDE[...]

1 I NTR ODUCING THE G ATEWAY Welcome to the world of networking with 3Com ® . In the modern business environment, communication a nd sharing information is crucial. Computer networks have proved to be one of the fastest modes o f communicat ion but, until r ece ntly , only large businesses could affo r d the networking advantage. The OfficeConnect[...]

12 C HAPTER 1: I NTRODUCING THE G ATEWAY Figure 1 Example Network Without a Gateway When you use the Gatew ay in your network ( Figure 2 ), it becomes your connection to the Internet. Connections can be mad e dire ctly to the Gateway , or to an Of ficeConnect Sw itch or Hub, exp anding the number of computers you can have in your network. Figure 2 [...]

Gateway Advantages 13 Gateway Advantages The adva ntages o f the Gateway in clude: ■ Shar ed Internet connection for wired com puters. The Wireless Cable/DSL Gateway also pr ovides shared internet connection to wire less computers ■ No need for a dedicated, “alway s on” computer serving as your Internet connection ■ Cross-platform operati[...]

14 C HAPTER 1: I NTRODUCING THE G ATEWAY Minimum System and Component Require ments Y our Gateway requir es that the computer(s) an d components in yo ur network be configured with at least the following: ■ A computer with an operating system that supports TCP/IP networking protocols (for exam ple Windows 95/98/NT/Me/2000 /XP , Unix, Mac OS 8.5 o[...]

Front Panel 15 ■ The Gateway has just been starte d up and is running a self-test rou t i n e , or ■ The administrat or has invoked the Reset to Factory Defaults command, or ■ The system software is in the pr ocess of being upgraded In each of these cases, wait until the Gateway has completed the cu rrent operation and the alert LED is Of f. [...]

16 C HAPTER 1: I NTRODUCING THE G ATEWAY 4 Wireless LAN (WLAN) Status LED * Available on the OfficeConnect Wi reless Cable/DSL Gateway only Y ellow If the LED is on it indicates that wi reless networking is enabled. If t he LED is flashing, data is bein g transmitted or r eceived. If the LED is of f, the W ireless LAN has been disabled in the Gatew[...]

Rear Panel 17 7 Power Adapter Socket Only use the power adapter sup plied with this Gateway . Do not use any other adapter . 8 Ethernet Cable/DSL port Use the supplied patch cable to connect the Gateway to the Ethern et port on your cable or DSL modem. The port will automatically adjust to the correct speed and duplex. 9 Four 10/100 LAN ports Using[...]

18 C HAPTER 1: I NTRODUCING THE G ATEWAY[...]

2 H AR DWAR E I NSTALLATION Introduction This chapter will guide you thr ough a basic installation of the Gateway , including: ■ Connecting the Gateway to the Internet. ■ Connecting the Gateway to your network. ■ Setting up your computers for networking with the Gateway . Safety Information WAR N I NG : Please read the “ Safety Information [...]

20 C HAPTER 2: H ARDWARE I NSTALLATION connections to computers in both horizon tal and vertical directions, allowing wide r coverage. When positioning your Gateway , ensure: ■ It is out of direct sunlight and away from sour ces of heat. ■ Cabling is away from power lines, fluor escent lighting fixtures, and sources of electrical noise such as [...]

Before you Install your Gateway 21 CAUTION: Only wall mount single units, do not wall mount stacked units. Before you Install your Gateway Before you install and configure your Gateway , you need the following additional information. If you do not have this information, contact your Internet Service Pr ovider (ISP). Space is pr ovided below for you[...]

22 C HAPTER 2: H ARDWARE I NSTALLATION If your ISP allocates IP information dynamically over a protocol oth er than PPPoE, you do n ot need a ny further info rmation. This con figuration is typical of cable connections. Powering Up the Gateway T o power up the Gateway: 1 Plug the power adapter into the power adapter socket located on the back pane [...]

Connecting t he Gateway 23 3 Connect the cable or DSL modem to the Internet. 4 Connect your computer to one of the four LAN ports on th e Gateway using a twisted pa ir cable. Che ck th at the corr esponding LAN status LED on the Gateway lights. Y ou have now completed the hardware installation of your Gateway . Next you need to set up your computer[...]

24 C HAPTER 2: H ARDWARE I NSTALLATION[...]

3 S ETTING U P Y OUR C OMPUTERS The Gateway ha s the ability to dynami cally allocate network addresses to the computers on your network, us i ng DHCP . However , your computers need to be configured correctly for this to take place. T o change the configuration of your compu ters to a llow this, follow the instructions in this chapter . If your co[...]

26 C HAPTER 3: S ETTING U P Y OUR C OMPUTERS Figure 6 Local Ar ea Pr operties Screen 6 Ensure that the opt ions Obtain an IP Address automatically , and Obtain DNS server address automatically are both selected as shown in Figure 7 . Click OK . Figure 7 Internet Protocol (TCP/IP) Properties Scr een 7 Restart your computer .[...]

Obtaining an IP Address Automaticall y 27 Windows XP 1 From the Win dows Start menu, select Control Panel . 2 Click on Network and Internet Connection s . 3 Click on the Network Connections icon. 4 Double click on LAN or High Speed Connection icon. A screen titled Local Area Connection Status will appear . 5 Select Internet Protocol TCP/IP and clic[...]

28 C HAPTER 3: S ETTING U P Y OUR C OMPUTERS Disabling PPPoE and PPTP Client Software If you have PPPoE or PP TP client so ftware installed on your computer , you will need to disable it. T o do this: 1 From the Win dows Start menu, select Settings > Control Panel . 2 Double click on Internet Options. 3 Select the Connectio ns T ab. A scr een si[...]

4 R UNNING THE S ETUP W IZAR D Accessing the Wizard The Gateway setup pr ogram is W eb-based, which means that it is accessed through your W eb br owser (Netscape Navigator or Inter net Explorer). T o use the Setup W izard : 1 Ensure that you have at least one computer conne cted to the Ga teway . Refer to Chapter 2 for details on h ow to do th is.[...]

30 C HAPTER 4: R UNNING THE S ETUP W IZARD Figure 10 Gateway Login Scr een 5 If the password is correct, the Countr y Selection scre en will appear (on the W ireless Cable/DSL Gateway only). Select the country you wish to configure the gateway for , then click Apply . ( Figure 11 ) Figure 11 Country Selection Scr een 6 When you have logged in (Cabl[...]

Accessing the Wizard 31 or ■ If your Gateway has not been co nfigur ed befor e, the Wizard will launch automatically (refer to Figure 13 ). 7 Click Next . 8 Y ou will be guided step by step through a basic setup pr ocedur e. Figure 12 W elcome Screen Figure 13 Wizard Screen[...]

32 C HAPTER 4: R UNNING THE S ETUP W IZARD Password Figur e 14 Change Administration Passwor d Screen When the Change Administration Password screen ( Figure 14 ) appears, type the Old Password , t hen a new password in both the New Password and Confirm Passwor d boxes. 3Com recommends entering a new password when setting up the Gateway for the fir[...]

Accessing the Wizard 33 The Daylight Savin gs option advances the system clock by one hour . It does not cause the system clock to be updated for daylight savings time automatica lly . W AN Settings Figure 16 Internet Settings Screen This Internet Addressing Mode window allows you to set up the Gateway for the type of Inter net connect ion yo u hav[...]

34 C HAPTER 4: R UNNING THE S ETUP W IZARD PPPoE Mode Figure 17 PPPoE Scr een T o setup the gateway fo r use with a PPP over Ether net (PPPoE) connection, use the following procedur e: 1 Enter your PP P over Ether net user name in the PPPoE User Name text box. 2 Enter your PPP over Ether net password in the PPPoE Password text box. 3 Enter your PPP[...]

Accessing the Wizard 35 Dynamic IP Address Mode T o setup the Gateway for use with a dynamic IP address connection: 1 Select the ISP provides configurati on dynamically (via DHCP) and then click Next . See Figure 16 . Figure 18 Hostname Scr een 2 Some ISPs require a host name. If your ISP has this r equir ement, enter the host name in the Host Name[...]

36 C HAPTER 4: R UNNING THE S ETUP W IZARD Static IP Mode T o set up the Gateway for use with a st atic IP addr ess co nnection, use the following procedur e: 1 Select ISP has provided a static IP address, (see Figur e 16 ) and then click Next. Figure 20 displays. Figure 20 Static IP Mode Screen 2 Enter your IP Ad dr ess in the IP Address text box.[...]

Accessing the Wizard 37 PPTP Mode Figure 21 PPTP Mode Scr een T o setup the gateway for use with a PPTP connection, use the following procedur e: 1 Enter your PP TP server address in the PPTP Server Address text box. 2 Enter your PP TP user name in the PPTP User Name text box. 3 Enter your P PTP pa ssword in the PPTP Passw ord text box. 4 Enter you[...]

38 C HAPTER 4: R UNNING THE S ETUP W IZARD 6 IP settings must be used when establ ishing a PP TP connectio n. Fill in the Initial IP Address and the Initial Subnet Mask fields if your ISP has provided you with these settings. Alternat ively , if the PP TP server is located in your DSL modem, click Suggest to select an IP address on the same subnet [...]

Accessing the Wizard 39 make your required changes. T o disable DHCP , select Do not enable the DHCP server . Click Next when you have finished. If you have a Cable/DSL Gateway , your Gateway is now configured and re ady for use. See Chapter 5 for a detailed description of the Gateway configuration screens. If you have a W ireless Cable/DSL Gateway[...]

40 C HAPTER 4: R UNNING THE S ETUP W IZARD It is ver y important that you set up your wireless clients to use the same Service Ar ea Name or SSID as the one you use on this screen. If your clients use a different Service Area Na me then they will not be able to communicate with the Gateway . The choice of channel is less important as Clients will g[...]

5 G ATEWAY C ONFIGURATION Navigating Through the Gateway Configuration Pages This chapter describes all the screens available thr ough the Gateway configuration pages, and is provided as a r efer ence. T o get to the configuration pages, browse to the Gateway by entering the URL in the location bar of your browser . The def ault URL is http://192.1[...]

42 C HAPTER 5: G ATEWAY C ONFIGURATION ■ Status and Logs - displays the curren t status and activity logs of the Gateway . ■ Support - contains a comprehensive online help system Option T abs Each corresponding menu page may also provide sub-sections which ar e accessed through the use of tabs (see Figure 27 for example). T o access a sub-secti[...]

Welcome Screen 43 Notice Board Figure 28 Notice Board Scr een The Notice Board is used to display configuration war ning messages. For example, you would be warned if you h ad disabled the Firewall. Password Figur e 29 Passwor d Screen Changing the Administration Passwor d Y ou can chan ge the password to pr event unauthorized access to the Adminis[...]

44 C HAPTER 5: G ATEWAY C ONFIGURATION If you have forgotten your password you need to reset the G ateway . See “ Forgotten Password and Reset to Factory Defaults ” on page 76 Wizard Figur e 30 Wizard Screen Click WIZARD... to launch the configuration wizard. Refer to Chapter 4 for information on how to run the wizard. LAN Settings The LAN Sett[...]

LAN Settings 45 The LAN Set tings screen is used to s pecify the LAN IP address of your Gateway , and to configure the DHCP server . 1 Select Unit Configuration and t hen specify the Gateway IP Ad dress and Subnet Mask in the LAN Settings field. The default IP address of the Gateway is 192.168.1.1. 2 If you want to use the Ga teway as a DHCP Server[...]

46 C HAPTER 5: G ATEWAY C ONFIGURATION As the IP address is fixed to a MA C addr ess, then each particular computer will normally be issued with the same IP address. The only time that a PC will get a differ ent IP address is if the unit is r eset to factory defaults or the DHCP server has run out of IP addresses. Wire less Settings The following s[...]

Wireless Settings 47 channel number . Usually the W ireless computers will scan to find the correct channel, but if they don't you must configure them to use the same Channel number as the Gateway . V alid channels are coun try de pendent. See “ Channels ” on page 115 for a list of channels approved by each count ry . Service Area Name/SSI[...]

48 C HAPTER 5: G ATEWAY C ONFIGURATION Encryption Figure 34 Encryption Scr een W ired Equivalent Privacy or WEP allow s you to e ncrypt the tra ffic between your W ireless PC and the Gate way . It is important to remember that with WEP disabled anyone with a W ireless PC can eavesdrop on your network. 3Com recommends that you get the network workin[...]

Wireless Settings 49 Encryption Keys Figure 35 Encryption Keys Scr een A Key is a hexadecimal (0-9, A-F) num ber used to encrypt and decrypt the data. There can be up to 4 keys and each key can b e as long as 26 digits. The Gateway also offers a number of methods for convert ing plain text into hex keys. The text is much easier to remember than hex[...]

50 C HAPTER 5: G ATEWAY C ONFIGURATION ■ Passphrase - This is another common method and similar to the 3Com Encryption string. In 64 bit WEP , the passphrase will generate 4 differ ent keys. However , in 128 bit WEP , this metho d only generates 1 key which is re plicated for all 4 keys. The passphrase can be up to 31 characters long and may cont[...]

Wireless Settings 51 same Service Area Name/SSID, cha nnel and encr yption settings as t he Gateway can connect to it. Select Only Authorised W ireless PCs can connect to the Gateway to enable and configure this feature. If you enable this feature from a Wireless PC, it will automatically be added to the Authorised Wireless PC list . Authorised Wir[...]

52 C HAPTER 5: G ATEWAY C ONFIGURATION 3 Press Add . Click Close to discard all changes. Modifying a MAC Address 1 Click on the MAC address to be modified in the table ( Figu re 38 ) 2 Modify the MAC addr ess. The MAC ad dr ess can be edited manually , or a differ ent MAC addr ess may be selected fr om the dr op down list of detected addresses. 3 P[...]

Wireless Settings 53 Client List Figure 39 Client List Screen The W ireless Client List pr ovides de tails on the devices that ar e connected to the W ireless LAN. The list is only cr eated when Wireless Networking is enabled. For each device that is c onnected to the W ireless LAN, the MAC address and Connection Speed of that device is displayed. [...]

54 C HAPTER 5: G ATEWAY C ONFIGURATION ■ Service Area Name/SSID of the Gateway This is co nfigured on the Configur ation tab under the Wireless Settings option. ■ Encryption settings from the Gateway This is co nfigured on the Encr yption tab un der the W ireless Settings option. ■ Profile Name This is used to identify the profile once it has[...]

Internet Settings 55 Internet Settings Befor e you can configur e the Ga teway , you need to kn ow the IP information allocation method u sed by your ISP . There are four dif ferent ways that ISPs can allocate IP information, as described below: 1 Static IP Address (DSL or Cable) The ISP provides the IP addressing in formation for you to enter manu[...]

56 C HAPTER 5: G ATEWAY C ONFIGURATION When you inst all the Gatewa y , you will not need t o use the di alup VPN on your PC anymore. Connection to ISP Figure 41 Connection to ISP Scr een Before beginning this section, ensure you have the requir ed information from your ISP . (See “ Befor e you Install your Gateway ” on page 21 .) Select Intern[...]

Internet Settings 57 Static IP Addr ess Figure 42 Connection Parameters Scr een - Static IP T o setup the Gateway for use with a Static IP address connection: 1 Select Static IP Add ress (to be specified manually) in the IP Allocation Mode field ( Figure 42 ). 2 Enter your IP Ad dr ess in the IP Address text box. This information, along with the re[...]

58 C HAPTER 5: G ATEWAY C ONFIGURATION Dynamic IP Address Figure 43 Connection Parameters Scr een - Dynamic IP If this mode is selected, your IP Address, Subnet Mask, and DNS Addr ess will be obtained automatically from yo ur ISP . They ar e not displayed on this scre en, but may be viewed on the Status scr een (clic k on Status and Logs on the lef[...]

Internet Settings 59 ■ Use this PC’ s MA C address - This field is automatically filled in with the MAC address of the PC you ar e using to configure the Gateway . Y ou should use this address only if you were previously using this computer to connect directly to your modem. ■ Enter a new MAC address manually - Use this option if you want to [...]

60 C HAPTER 5: G ATEWAY C ONFIGURATION 6 Enter your PPP over Ethernet service name in the PPPoE Ser vice Name text box. Not all ISPs requir e a PPPoE serv ice name. Only ent er a service name if your ISP r equires this. 7 Select an idle time from the Maximu m Idle Ti me drop-down list. This value will corres pond to the amount of idle time (no Inte[...]

Firewall 61 6 Select an idle time from the Maximu m Idle Time drop-down list. This value will corres pond to the amount of idle time (no Internet activity) that will pass befor e the Gatewa y automatically ends your PPTP session. 7 IP settings must be used when establ ishing a PP TP connectio n. Fill in the Initial IP Address and the Initial Subnet[...]

62 C HAPTER 5: G ATEWAY C ONFIGURATION Virtual Server Activating and configuring a virtual server allows one or more of the computers on your network to function as a public server . For example, one of your computers could be configured as an F T P server , allowing others o utside of your of fice netw ork to downloa d files of yo ur choosin g. Or[...]

Firewall 63 The port numbers are specified usin g a comma-separated list, with hyphens to denote port number rang es. So for example , entering 2, 3, 5-7 would cause por ts 2, 3, 5, 6, and 7 to be activate d. Special Applications Figure 49 Special Applications Screen Select Special Applications tab to display Authorized Application setup scre en. ([...]

64 C HAPTER 5: G ATEWAY C ONFIGURATION Figure 50 Special Application Settings Scr een Or select Other to specify a suit able name for the special applicat ion and then enter a value in the T rigger Port and Incoming Ports text boxes ( Figure 50 ). These values corr espond to the outbound port numbers issued by the application. The port numbers are [...]

Firewall 65 PC Privileges Figure 52 PC Privileges Scr een Select PC Privileges to display the PC Privilege setup screen ( Figur e 52 ). Access from the local network to th e Internet can be controlled on a computer -by-computer basis. In the default conf iguration the Gateway will allow all connected computers unlimited access to the Inter net. PC [...]

66 C HAPTER 5: G ATEWAY C ONFIGURATION In addition to the four authorised se rvices listed, you can ch oose to allow or block access to other services. Y ou can either: ■ Allow all other services with exceptions, or ■ Block all other services with exceptions 4 T o do this, select Allow or Block fr om the drop down menu and enter the exceptions [...]

Firewall 67 4 Select authorized services by clic king in the appr opriate check box(es). In addition to the four authorised se rvices listed, you can ch oose to allow or block access to other services. Y ou can either: ■ Allow all other services with exceptions, or ■ Block all other services with exceptions See step 4 of the previous section fo[...]

68 C HAPTER 5: G ATEWAY C ONFIGURATION This feature is enabled by clicking on the ch eck box so that a tick can be seen and then select Apply . 3Com recommends that you leave this disabled. Disable Firewall The Gateway contains a fire wall that detects attack patterns used by hackers on the Inter n et and once detected will block their access to yo[...]

System Tools 69 System T ools The main frame of the System T ools scr een includes four administration items: Restart, Time Zone, Configur ation, and Upgrade ( Figure 56 ). Restart Figure 56 Restart Scr een If your Gateway is not operating correctly , you can choose to restart the Gateway by selecting Restart the Gateway , simulating the effect of [...]

70 C HAPTER 5: G ATEWAY C ONFIGURATION Choose the time zone that is closest to your actual location. The time zone setting is used by the system clock when displaying the correct time in the log files. If you use Daylight saving tick the Enab le Daylight savings box, and th en click Apply ( Figure 57 ). The Gateway reads the correct time fr om NTP [...]

System Tools 71 Reset to Factory Default If you want to reset the settings on your Gateway to those that wer e loaded at the factory , click RESET . Y ou will lose all your configuration changes. The Gateway LAN IP addr ess will r evert to 192.168.1.1, and the DHCP server on the LAN will be en able d. Y ou may need t o r econfig ur e and restart yo[...]

72 C HAPTER 5: G ATEWAY C ONFIGURATION Status and Logs Figure 60 Status and Logs Scr een Selecting Status and Logs fro m the main me nu displa ys the Status and Logs screens ( Fi gur e 60 ) in your W eb browser window . The Status screen displays a tabular re presentation of your network and Inter net connection.[...]

Status and Logs 73 Status Status will display the current unit status, including a summary of the configuration Logs Logs will allow you to view both th e normal events, and security threats logged by the Gateway Y ou may be asked to refer to the information on the Status and Logs screens if you contact your supplier for technical suppor t. Support[...]

74 C HAPTER 5: G ATEWAY C ONFIGURATION[...]

6 T R OUBLESHOOTING Basic Connection Checks ■ Check that the Gateway is connected to your computers and to the cable/DSL modem, and that all th e equipmen t is powered on. Check that the LAN and W AN port link status LEDs on the Gateway are illuminated, and that any corresponding LEDs on the cable/DSL modem and the NIC (Wireless Gateway only) ar [...]

76 C HAPTER 6: T ROUBLESHOOTING choose Run and then enter winipcfg . Check that the computer has an IP addr ess of the form 192.168. 1.xxx (where xxx is in the range 2-254), the subnet mask is 255.255. 255.0, and the defau lt Gateway is 192.168.1.1 (the address of the Gatewa y). If these are not correct, use the Releas e and Renew functions to obt [...]

Wireless Networking 77 Gateway connection to the Internet. Al so, other computer users will lose their network connections whilst this pr ocess is taking place, so choose a time when th is would be convenien t. 1 Remove power from the Gateway . 2 Disconnect all your computers a nd the cable/DSL modem from the Gateway . 3 Using a straight through Et[...]

78 C HAPTER 6: T ROUBLESHOOTING ■ Ensure that the Wi reless Clients are using the same SSID or Service Are a Name as the Gateway . The SSID is case-sensitive ■ Ensure that you ar e using the same level of security on all of your wireless computers (None, 40/64 or 128 bit) and that all devices are using the same keys, and the same order of keys [...]

Alert LED 79 centre of the network with Wireless computers distributed around it. Applications are generally available wi th the computer wireless car d to carry out a site survey . Use this app lication to find the optimal siting for your wireless computer . Consult your Computer Card documentation and vendo r for more details. Alert LED The Alert[...]

80 C HAPTER 6: T ROUBLESHOOTING 1 Remove power from the Gateway an d disconnect the Cable/DSL modem and all your computers, except for the one comp uter with the software image. 2 Y ou will need to reconfigur e this co mputer with the following static IP address information: ■ IP address: 192.168.1.2 ■ Subnet mask: 255.255.255.0 ■ Default Gat[...]

Frequently Asked Questions 81 There ar e only 4 LAN ports on the Gateway . How are additional computers connected? Y ou can expand the number of connections available on your LAN by using hubs, switches and wireless access points connected to the Gateway . 3Com wireless acce ss points and OfficeConnect hubs and switches provide a simple, re liable [...]

82 C HAPTER 6: T ROUBLESHOOTING[...]

A U SING D ISCOVERY Running the Discovery Application 3Com provides a user friendly Disc overy application for detecting the Gateway on the n etwork. Windows Installation (95/98/2000/Me/NT ) 1 Insert the Gateway CD-ROM in the CD-ROM drive on your computer . A menu will appear; select Gateway Discover y . Discovery will find the Gateway even if it i[...]

84 A PPENDIX A: U SING D ISCOVERY Figure 63 Discover ed Gateway Screen 3 Figur e 64 shows an example Discovered Devices screen. Highlight the Wireless Cable/DSL Gateway by clicking on it, and press Next . Figure 64 Discovery Finish Scr een 4 Click on Finish to laun ch a web br owser an d displa y the lo gin pa ge for the Gateway .[...]

B IP A DDR ESSING The Internet Protocol Suite The Inter net protocol suite cons ists of a well-defined set of communicat ions pr otoc ols and se vera l standar d application pr otocols. T r ansmission Control Protocol/Interne t Protocol (TCP/IP) is probably the most widely known and is a combination of two of the protocols (IP and TCP) working toge[...]

86 A PPENDIX B: I P A DDRESSING For your network to work correctly , all devices on the netwo rk must have: ■ The same sub-network ad dress. ■ The same subnet mask. The only value that will be different is the specific host device number . This value must always be unique. An example IP address is ‘192.168. 100.8 ’. Howev er , the size of t[...]

How does a Device Obtain an IP Address and Subnet Mask? 87 This type of IP Address operates on a subnet mask of ‘255.255.0.0’. See Ta b l e 4 for an example about how a network (only four computers r epr esent ed) and a Gateway might b e config ur ed. Ta b l e 4 IP Addressing and Subnet Masking How does a Device Obtain an IP Address and Subnet [...]

88 A PPENDIX B: I P A DDRESSING an IP addr ess at random from th e industry stan dard subnet of 169.254.x.x (with a s ubnet mask of 2 55.255.0.0). If two devices allocate themselves the same address, the c onflict is detected and one of the devices allocates itse lf a new address. Automatic IP addressing support was intr oduced by Microsoft in the [...]

C T ECHNICAL S PECIFICATIONS This section lists the technical sp ecifications for the OfficeConnect Cable/DSL Gateway and the W ireless Cable/DSL Gateway . Cable/DSL Gateway Interfaces Cable or DSL modem connection - 10/100 FD. LAN connection - four 10Mbps/100Mbps dual speed Ether net ports (10BASE-T/100BASE-TX) Operating T emperature 0 °C to 40 ?[...]

90 A PPENDIX C: T ECHNICAL S PECIFICATIONS Safety: UL 1950, EN 60 950 CSA 22.2 #950 IEC 60950 EMC: EN 55022 Class B EN 55024 AS/NZS 3548 B FCC Part 15 Class B* ICES-003 Class B VCCI Class B CNS 13438 Class A Environmental: EN 60068 (IEC 68) *See “ Safety Information ” on page 95 for conditions of operation. System Requirements Operating Systems[...]

91 Wire less Cable/DSL Gateway Interfaces Cable or DSL modem connection - 10/100 FD. LAN connection - four 10Mbps/100Mbps dual speed Ether net ports (10BASE-T/100BASE-TX) WLAN Interface Standard IEEE 802.11b, Direct Sequence Spread Spectrum (DSSS) T r ansmission rate: 11Mbps, automa tic fallback to 5.5, 2 or 1Mbps Maximum channels: 13 Range up to 3[...]

92 A PPENDIX C: T ECHNICAL S PECIFICATIONS Standards Functional: ISO 8802/3 IEEE 802.3 IEEE 802.11b, W iFi Safety: UL 1950, EN 60 950 CSA 22.2 #950 IEC 60950 EMC: EN 55022 Class B EN 55024 AS/NZS 3548 B FCC Part 15 Class B* ICES-003 Class B CNS 13438 Class A ETS 300-826 Radio CFR 47 FCC Part 15. 207, 15.209, 15 .247 and 15.249. ETS 300 328 (2.4 GHz[...]

93 Wireless Performance Th e W ireless Cable/DSL Gateway complies with the IEEE 802.11b specification and conforms to the WiFi interoperability test standar d. Cable Specifications The W ireless Cable/DSL Gateway supports the following cable types and maximum l engths: ■ Category 3 (Ether net) or Category 5 (Fast Ether net or Du al Speed Ether ne[...]

94 A PPENDIX C: T ECHNICAL S PECIFICATIONS[...]

D S AFETY I NFORMATION Important Safety Information WA RN I N G : W arnings cont ain di rections th at you must f ollow for yo ur personal safety . Follow all directions carefully . Y ou must read the following safety information carefully before you install or remove the unit: WAR N I NG : The Gateway generates and uses radio frequency (rf) energy[...]

96 A PPENDIX D: S AFETY I NFORMATION WAR N I NG : Disco nnect the power adapter before moving the unit . WARNING: RJ-45 ports. These are shielded RJ-4 5 data sockets. They cannot be used as telephone so ckets. On ly connect RJ-45 data connectors to these sockets. Wichtige Sicherheitshinweise VORSICHT : Warnhinweise enthalten Anweisungen, die Sie zu[...]

97 VORSICHT : Es sind keine vo n dem Benutzer zu ersetzende od er zu wartende T eile in dem Gerät vorhand en. We nn Sie ein Problem mit dem Gateway haben, das nicht mitte ls der Fehleranalyse in dieser Anleitung behoben werden kann, setz en Sie sich mit Ihrem Lieferanten in V erbind ung. VORSICHT : V or dem Ausbau des Gerä ts das Netzadapterkabel[...]

98 A PPENDIX D: S AFETY I NFORMATION A VERTISSEMENT : L ’appareil fonctionne à une tension extrêmement basse de sécurité qui est conforme à la n orme CEI 950. Ces conditions ne sont maintenues que si l'é quipement auq uel il est raccordé fonctionne dans les mêmes conditions. A VERTISSEMENT : Il n’y a pas de parties remplaceables pa[...]

E E ND U SER S OFTWAR E L ICENCE A GR EEMENT 3Com Corporation END USER SOF TWA RE LICENSE AGREEMENT YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CO NDITIONS BEFORE DOWNLOADING, INSTALLING AND USING THIS PRODUCT, THE USE OF WHICH IS LICENSED BY 3COM CORPORATIO N ("3COM") TO ITS CUSTOMERS FOR THEIR USE ONLY AS SET FORTH BELOW. DOWNLO A[...]

100 A PPENDIX E: E ND U SER S OFTWARE L ICENCE A GREEMENT and developed solely at private expense. Th e Sof tware is delivered as "Commercial Comp uter Software" as defined in DFA RS 252.22 7 -7014 (June 1995) or as a commercial item as defined in FAR 2.101( a) and as such is provided with only such r ights as are provided in th is Agreem[...]

F ISP I NFORMATION Information Regarding Popular ISPs WAN Types Characteristics Popular ISPs Dynamic IP (Clone MAC) Cable modem ISP, non-ho stname based. Need to clone the MAC address in the Advanced tab of the Internet Settings page. MediaOne, RoadRunner, Optimum Online, Time Warner, Charter, Adelphia, Metrocast. Dynamic IP (Hostname) Cable ISP, R[...]

102 A PPENDIX F: ISP I NFORMAT ION *Bell includes Bell Advantage, Bell Canada, Bell South, PacBell and Southwester n Bell. Static (DSL) DSL Modem, always on. Need to enter ALL IP information from ISP in the Static IP address section of the Internet Settings page. CableSpeed, Cnet, Direct Link, Drizzle, DSL Extreme, E arthlink Wireless, Fast Point, [...]

G LOSSARY 802.11b The IEEE standard to which the 3C om OfficeConnect Wireless Cable/DSL Gateway conforms. This standard pr ovides for 1,2,5 and 11 Mbps data rates and a set of fundamental signa ling methods and other services (see WECA). 10BASE-T The IEEE specificatio n for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE-TX The[...]

104 G LOSSARY 802.3 standard for Ether net and is an oper ation that takes place in a fe w milliseconds. Bandwidth The information ca pacity , measured in bits per second, th at a channel ca n transmit. The bandwidth of Ethernet is 10 Mbps, the bandwidt h of Fast Ether net is 100 Mbps. Th e bandwidth for 802.11b wireless is 11Mbps. Category 3 Cable[...]

G LOSSARY 105 your Intern et browser), the user is sent to the pr oper IP address. The DNS server address used by the computers on your home network is the location of the DNS server you r ISP ha s assign ed. DSL modem DSL stands for digital subscriber line. A DSL modem uses your existing phone lines to send and receive data at high speeds. Encrypt[...]

106 G LOSSARY Hub A device that regenerates LAN traffic so that the trans mission distance of that signal can be extended. Hub s are similar to r epeaters, in that they connect LANs of the same type; howe ver they connect more LANs than a repeater and ar e generally mor e sophisticated. IEEE Institute of Electrical and Electr onics Engineers. This [...]

G LOSSARY 107 MAC Media Access Contr ol. A protocol spec ified by the IEEE for determining which devices have access to a network at any one time. MAC Addr ess Media Access Control Addr ess. Also called the hardwar e or physical address. A layer 2 addr ess associated with a particular network device. Most devices that connect to a L AN have a MAC a[...]

108 G LOSSARY SSID Service Set Identi fier . Some vendors of wireless pr oducts use SSID interchangeably with ESSID. Subnet Address An ext ension of the IP addressing scheme that allows a site to use a single IP network address for multiple physical networks. Subnet mask A subnet mask, which may be a part of the TCP/IP inform ation pr ovided by you[...]

G LOSSARY 109 WEP W ired Equivalent Privacy . A shared key encryption mechanism for wireless networking. Encrypt ion strength is 40/64 bit or 128 bit. WiFi W ireless Fidelity . This is the certification granted by WECA to products that meet their intero perability criteria. (see also 802.11b, WECA) Wir eless Client The term used to descri be a desk[...]

110 G LOSSARY[...]

I NDEX A Access Rights 66 Addresses IP 85 Administration Password 32, 43 Automatic Addressing 87 C Cable Specifications 90, 93 Channels 115 Clone M AC address 58 Configuration backup 70 res t o re 7 0 Conventions notice icons, About This Guid e 8 text, About This Guide 8 Country Selection 30 D DHCP 35, 38, 45, 87 DHCP Server 27 Discovery Applicatio[...]

112 I NDEX P Passwor d 29, 43 PC Privileges 65 PING 67 PPPoE 21, 28, 34, 55, 59 PPTP 21, 55, 60 Profile 53 R Remote Administration 68 Reset to Factory Defaults 71, 76 Restart 69 S Safety Information 19 Security 67 Setup W izard 29, 44 Special Applications 63 Specifications technical 89 Static Addressing 87 Static IP Address 55, 57 Status 73 Subnet [...]

R EGULATORY N OTICES F OR THE C ABLE /DSL G ATEWAY FCC Statement This equipment has been tested and f oun d to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules, and the Canadian Department of Communicati ons Equipment Standards entitl ed, “Digital Apparatus,” ICES-003. Th ese limits are designed to provi[...]

114 CE Statement (Europe) This pr oduct complies with the European Low V oltage Directive 73/23/EEC, EMC Directive 89/336/EEC as amended by European Dir ective 93/68/EEC. CSA Statement This Class B digital apparatus meets all r equirements of the Canadian Interfer enc e-Causing Equipmen t Regulat ions. Cet appareil numérique de la classe B respect[...]

R EGULATORY N OTICES FOR THE W IR ELESS C ABLE /DSL G ATEWAY Channels Use of the W ireless Cable/DSL Gateway is only authorized for the channels approved by each country . Fo r proper installation, login to the management interface and select your coun try from the drop down list. Ta b l e 5 belo w details the channels permitted by the local regula[...]

116 Information to the User If this equipment does cause interfere nce to radio or television re ception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interfer ence by one or mor e of the followi ng meas ur es: ■ Reorient the receiving antenna. ■ Relocate the equipm ent with respect t[...]

117 Exposure to Radio Fr equency Radiation: The radiated output power of the 3Com OfficeConnect Wireless Cable/ DSL Gateway is far below the FCC radio frequency exposur e limits. Nevertheless, the 3Com Of fic eConnec t W ireless Cable/DSL Gateway shall be used in such manner that the potential for human co ntact during normal operation is minimized[...]

118 RF Exposure Compliance Statement (U.S.) CAUTION : The 3Com OfficeConn ect Wi reless Cable/DSL Gateway has been certified as a mobi le computing d evice as per FCC Section 2 .1091. In order to comply with the FCC RF exposure requirements, the 3Com OfficeConnect W ireless Cable/DSL Gate way must only be installed with approved antennas and a min [...]

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3Com Corporation, Corporate Headquarters, 5400 Bayfront Plaza, Santa Clara, CA 95052-8145, USA. T o lear n more about 3Com products and services, visit our World Wide Web site at www .3com.com All specifications are subject to change without notice. Copyright © 2002 3Com Corporation. All rights reserved. 3Com and OfficeConnect are r egistered trad[...]