Instruction/ maintenance manual of the product 3CR856-95 3Com
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3Com Corporati on 5400 Bayfront Plaza Santa Clara, Califor nia 95052-8145 Copyright © 2002, 3Com Corporation. A ll rights reser ved. No part of this do cumentation may be repr oduced in any form or b.
3 C ONTENTS Contents 3 About This Guide 7 Naming Convention 7 Conventions 7 Introducing the OfficeConnec t Cable/DSL Secure Gateway 9 OfficeConnect Cable/DSL Secure Gateway 9 Cable/DSL Secur e Gateway.
4 LAN Settings 35 LAN IP Settings 35 DHCP Clients List 37 Internet Settings 38 Connection to ISP 39 Setting up NA T 43 Configuring the Firewall 45 The Virtual Servers Menu 45 PC Privileges 47 Special .
5 Cable Specifications 78 Safety Information 79 Important Safety Information 79 Wichtige Sicherheitshinweise 79 Consignes im portantes de sécurité 80 End User Software Licence Agreement 83 3Com Corp.
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7 A BOUT T HIS G UIDE This guide is intended for use by th ose responsible for install ing and setting up network equi pment; consequently , it assumes a basic working knowledge of LANs (Local Area Networks) and Internet gateway systems.
8 Feedback about this User Guide Y our suggestions ar e very important to us. They will help make our documentation mor e useful to you. Please e-mail comments about this document to 3Com at: pddtechpubs_comments@3com.
9 I NTR ODUCING THE O FF I C E C ONNECT C ABLE /DSL S ECUR E G ATEWAY Welcome to the world of networking with 3Com ® . In the modern business environment, communi cation and sharing information is crucial.
10 Figure 2 Example Network Usi ng a Cable/DSL Sec ure Gateway Cable/DSL Secu re Gateway Advantages The advantages of using a Gateway include: ■ Shared Internet connection. ■ No need for a dedicated, “always on” computer serving as your Internet connection.
11 Package Conten ts The Of ficeConnect Cable/DSL Secure Gateway kit includes the following items: ■ One OfficeCo nnect Cable/DSL Secure Gatewa y ■ One power ad apter for use with the Gateway ■ .
12 Front Panel The fr ont panel of the Gateway c ontains a series of indica tor lights (LEDs) that help describe the state of various networking and connection operations. Figure 3 Cabl e/DSL Secur e Gateway - Fr ont Pane l 1 Alert LED (Orange) Indicates a number of dif ferent condi tions, as described below .
13 ■ the connected device is switched off ■ there i s a problem with the conn ection. “ T roubleshooting ” on page 67 . 4 Cable/DSL Status LED Green (100 Mbps link ) / Y ell ow (10 Mbps link) Indicates a number of dif ferent condi tions, as described below .
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15 I NSTALLING THE G ATEWAY Introd uction This chapter will guide you through a ba sic installation of the OfficeConnect Cabl e/DSL Secure Gateway , including: ■ Connecting the Gateway to the Internet.
16 PPPoE If your ISP allocates IP information dynami cally over PPPoE, you need a User Name and Passwor d: PPTP If your ISP allocates IP information dynami cally over PPTP , you need a User Name and Passwor d Only enter a PPP oE Service Name or Host Name or a PP TP Server Address if your ISP requires you to do this.
17 Powering Up the Gateway 1 Plug the power adapter into the power adapter socket located on the back panel of the Gateway (r efer to “ Power Adapter socket ” on page 13 ).
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19 S ETTING U P Y OUR C OMPUTERS The Of ficeConnect Cable/DSL Secure Gateway has the abi lity to dynamically allocate network addresses to the computers on your network, using DHCP . However , your computers need to be configured co rrectly for this to take place.
20 Figure 7 Int ernet Protocol Propertie s 7 Restart your computer . Windows 95, 98 , ME 1 From the Windows Start Menu, select Settings > Control Panel . 2 Double click on Network . Select the TCP/IP item for your network card and click on Properties .
21 Figure 8 Int ernet Properti es Y ou may wish to remove the PPPoE client software from your computer to free resources, as it is not required for use with the Gateway . Disabling W eb Proxy Ensure that you do not have a web pr oxy enabled on your computer .
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23 R UNNING THE S ETUP W IZARD If the Gateway needs to be confi gur ed, for example if it has not yet been used or has been reset, it will run the Setup W izar d automatically . This detects some of the settings the Gateway needs to function and asks that you input the others.
24 Figure 11 Welcome Screen If the Wiza rd does not launch automatically (this may occur if the Gateway has been power ed up or configured pr eviously) you can launch the Wi za rd manually . 5 T o launch the Wizar d manually click on the Setup Wizard tab in the welcome scre en followed by the WIZARD.
25 Figure 13 Change Administration P assword Screen Choose a password that you can remember but that others are unlikely to guess. Remember that th e password is case sensitive. Click Next to display the Tim e Zone setup screen ( Figur e 14 ). Setting the Time Zone The Gateway sets its time automati cally w hen it connects to the Internet.
26 Auto-Configuration Sett ings If the Gateway is able to detect a PPPoE or DHCP server on it s Ethernet Cable/DSL port then it will of fer you the option of configurin g its Internet se ttings au tomatic ally . As an ex ample, the Auto-Configuration screen for PPPoE is shown in Figure 15 below .
27 Static IP Mode T o setup the Gateway for use with a static IP address connection, use the followi ng procedure: Figure 17 Stati c IP Mode Screen 1 Enter your IP Address i n the IP Address text box. 2 Enter your subnet mask in the Subnet Mask text box.
28 Figure 19 Clone MAC Address Screen 4 If your ISP r equires an assigned MAC addr ess, select the appropriate radi o button: ■ Y es, please clone the MAC address from the PC I’m currently using if the computer you are using now is the one that was previ ously connected directly to the cab le or DSL modem.
29 4 If your ISP r equires the addr esses of a Primary and Secondary DNS Server then enter them in the fields labelled Primary DNS Address and Secondary DNS Address . 5 If your ISP r equires you to supply a host name en ter it in the Host Name box, otherwise leave the box blank.
30 Choosing your LAN Settings The LAN settings screen, shown in Figure 23 below , displays the Gateway’ s current IP addr ess and su bnet mask. If this is the first time the Wizard has been run it will display the default addr ess and subnet mask.
31 Figure 24 DHCP Serv er Setup Screen 3Com recommends that you activate the DHCP server and leave it at the default values unless you already have a DHCP Server on your netw ork. ■ T o activate the DHCP Server option, select Enable the DHCP server with the following settings: .
32 If want to make changes, click the Back button until you reach the screen whic h contains the settings you want to change and follow the instructio ns from th at point. Y our Gateway is now configur ed. Y ou can start using your Gatewa y straight away or further configure you r Gateway (see “ Gateway Configuration ” on page 33 ).
33 G ATEWAY C ONFIGURATION This chapter de scribes all the options ava ilable throug h the Gateway configuration pages, and is pr ovided as a refer ence. Navigating Thr ough the Gateway Configuration Pages T o get to the configuration pages, br owse to the Gateway by entering the URL in the location bar of your br owser .
34 We lcome Screen The We lco me section allows you to view the Notice board and to change your Passwor d. Y ou can also gain access to the Configuration Wizard. See “ Accessing the W izar d ” on page 23 for details. Viewin g the Notice Board The Notice Boar d, shown in Figure 27 bel ow , is used to display important messages.
35 Setup Wizard Figure 29 W izard Screen Click the WIZARD... button to launch the configuration wizar d. Refer to “ Running the Setup Wizar d” on page 23 for information on how to run the wizard. LAN Settings The LAN Settings menu allows you to view and amend you r Gateway’ s: ■ LAN settings.
36 When changing the IP Addr ess of the Gateway choose an address that will be un ique in your network and in your network’ s subnet. The default IP Address of the Gateway is 192.
37 DHCP Clients List The DHCP Client s screen pr ovides details of the devices that ha ve been given IP addr esses by the Gateway’ s DHCP server . For each device that has been granted a lease, the IP address , Host Name and MAC address of that device is displayed.
38 Figure 32 Fixed DHCP Mapping Screen Internet Settings Befor e you can configure the Gateway , you need to know the IP information allocati on method used by your ISP . There ar e four differ ent ways that ISPs can allocate IP i nformation, as described below .
39 Connectio n to ISP This option, shown in Figure 33 , allows you to change th e method your Gateway uses to connect to your ISP . Y ou should only need to change these setti ngs if: ■ you change your Internet connection password (PPPoE only), or ■ your ISP informs you of a change in their settings or you change ISPs.
40 Configur ing a Static IP Address If your ISP has allocated you o ne or more static addre sses you will have selected Static IP address (to be sp ecified manually) as your IP Allo cation Mode . Figure 34 Stati c Address Setup Screen The following se ttings are r equire d to set up Static IP addr ess connection.
41 Configur ing a Dynamic IP Address If your ISP has allocated you a dynamic addr ess using DHCP you will have selected Dynamic IP a ddress (automatically allocated) as your IP Allo cation Mode .
42 Configuring a PPPoE conne ction If your ISP has allocated you a dynamic addr ess using PPPoE you will have selected PPPoE (PP P over Ethernet) as yo ur IP Allocat ion Mode . Figure 36 PPPoE Set up Screen Y our ISP may n eed you to enter host name or PPPoE settings.
43 Configur ing a PPTP connection If your ISP has allocated you a dynamic addr ess using PPTP you will have selected PP TP (used by some European providers) as your IP Allo cation Mode. Figure 37 PPTP Setup Screen T o setup the Gateway for use with a PPTP connection the following fields will need to be completed.
44 Figure 38 One-to -Many and One-to- One NA T Figure 39 Networ k Address T ranslation Sc reen Setting up On e-to-Many NA T This is very easy to set up a nd the Gateway’ s default mode. It works with any IP Allocation Mode and will map all the addresses on your LAN to the Inter net addr ess of your Gateway .
45 Setting up On e-to-One NA T The following criteria must be me t to be able to use One-to-One NA T : ■ Y ou must have a static Internet IP address for every computer on your network plu s one for the Gateway itse lf.
46 Figure 41 Virt ual Servers Sc reen Creating a Virtual DMZ A virtual DMZ (De-Militarized Zone) Host is a computer on your network with r educed prote ction provided b y the firewall. This feature al lows a single computer to be exposed to 2-way communication fr om outside of your network.
47 Figure 42 Virt ual Servers Se ttings Screen Or select Custom to specify a suitable name for the service and then enter the port numbers requir ed for that service. If a service requi res more th an one port number enter the multiple ports as a comma separated list.
48 PC Priv ileges allows you to assign differ ent access rights for differ ent computers on your network, r estricting this access and controlli ng your users’ a ccess to outside resources. T o use a ccess control for all comp uters: 1 Click the Control PC Access to the Intern et radio button.
49 5 Either: ■ Enter the additional services th at you wish to allow in the except (specify ports) box and set the dr op down box to Allow . ■ Enter the services that you wish to deny in the except (specify ports) box and set the dr op down box to Deny .
50 So that these spe cial applications can work prop erly and are not blocked, the fir ewall needs to be told about them. In each instance there wil l be an outgoing trigger which tells the Gateway’ s firewall that the app lication has started and to allow the incoming connections.
51 Figure 49 Custom Sp ecial Applicat ions Setup Screen ■ Application Name — Each specia l application is named and will detect the ports that need to be opened so you do not need to specify them. This name is not used by the Gatewa y and is only to enable you to identify the connecti on.
52 Advanced Select Advanced to display the Advanced Settings screen. See Figur e 50 below . Figure 50 Advanc ed Settings Screen The Internet connects millions of computer users throughout the world.
53 Configuring VPNs A Virtual Private Network (VPN) is a secure tunnel between networks or between a network and a user . The Gateway supports both network to network connections and network to remote client connectio ns.
54 Figure 51 VPN Mode Screen L2TP Configura tion If you have enabled L2TP over IPSec you must enter the following items: 1 In the IPSe c Configur ation field, enter This Gateway’ s ID as an Internet IP address or name of the Gateway that you ar e configuring.
55 PPTP Configuration T o set up the Gateway for PPTP you must allocate IP addresses from the Gateway’ s LAN for use with PPTP . The connec tions made by PPTP will appear to come fro m these addresses.
56 ■ Name — Identifies the tunnel. Clicki ng the name of a connection displa ys the Edit VPN Connection screen. See “ Adding and Editing VPN C onnectio ns ” below. ■ Description — A text description that enables you to identify a connection.
57 Depending on which T unnel T ype you have selected, choose fr om the following to edit or add the r emaining fields: ■ “I PSec Connecti ons using Remote User Access ” on page 57 ■ “ IPSec.
58 Figure 54 IPSec Connectio n - Gateway to Gatew ay If the remote Gateway has a LAN IP address of 192.168 .1.1 and a subnet mask of 255.255.255.0 then th e LAN IP address of the remote subnet is 192.16 8.1.0. The Gateways must be configured with LAN IP address ranges that do not overl ap.
59 Gateway T w o is located at the sale s office and is configur ed with the following settings: ■ Internet IP address: 174.27. 34.202 ■ LAN IP addr ess: 192.168.2.1 ■ Remote Subnet Mask: 255 .255.255.0 T o set up an IPSec Connection between the two Gateways, do the following on each Gateway: 1 Select IPSec Enabled from the VPN Mode screen.
60 Click Apply to save your changes o r Close to return without saving. When you have created a user account the user wi ll need to know in order to enable conne ction. PPTP Connec tions If you have selected PPTP as a T unnel T ype, enter the following: ■ Password — The Password that the user will need to supply to connect.
61 Figure 57 IPSec Routes Figure 58 Edit Rou te Accessing the System T ools The System T ools menu includes four administration items: Restart, Time Zone, Configuration , and Upgrade . See Figur e 59 . Restart Pressing the Restart the Gateway button has the same ef fect as power cycling the unit.
62 Any network users who are curr ently accessing the Internet will have their access interrupted whil st the restart takes place, and they may need to reboot their comp uters when the restart has completed and the Gateway is ope rational again. Time Zone Choose the time zone that is closest to your actual locati on.
63 ■ If you want to reinstate the configuration settings pr eviously saved to a file, click Browse to locate the backup file on your computer , and then RESTORE to copy the configurati on back to the Gateway . For security purposes restori ng the confi guration does not change the password.
64 The upgrade pr ocedure c an take a few minutes, and is complete when the Alert LED has stopped fl ashing and is permanently off. Make sure that you do not interrupt power to the Gateway during the upgrade pr ocedure; if you do, the softwar e may be corrupted and the Gateway may no t start up properly afterwards.
65 Figure 64 Log Sett ings Screen Obtaining Support and Feedback for your Gateway Selecting Support/Feedback on the main menu generates bo th: ■ The support links scree n, which contains a list of Internet links that provide informati on and support concerning the Gateway .
66 ■ The feedback links scr een, which contains an Inte rn et link to the 3Com website so that you can pro vide feedback on the produ ct. ( Figur e 66 ) Figure 66 Feedba ck Screen dua 08 569 - 5aa a02.
67 T ROUBLESHOOTING Basic Connection Checks ■ Check that the Gateway is connected to your computers and to the Cable/DSL modem, and that all the equip ment is power ed on.
68 Connecting to the Internet If you can br owse to the Gateway configuration screens but cannot access sites on the Internet, check the followin g: ■ Confirm that the physical connection betwe en the Gateway and the Cable/DS L modem is OK, and that the link status LEDs on both Gateway and modem are ill uminated.
69 6 Re-apply power to the Gateway , and when the start-up sequence has completed, br owse to: http://192.168.1.1 and run the configurati on wizard. Y ou may need to restart your computer before y ou attempt this. 7 When the configuration wizar d has completed, you may reconnect your network as it wa s before.
70 5 Follow the on-scr een instructions. Enter the path an d filename of the software image file. 6 When the upload has completed, the Gateway wil l restart, run the self-test and, if successful, r esume normal operati on.
71 U SING D ISCOVERY Running the Discovery Application 3Com provid es a user -friendly Discovery applic ation for detecting the OfficeConnect Cabl e/DSL Secure Gateway on the network. Windows Installa tion (95/98/2000/Me /NT) 1 Insert the Gateway CD-ROM in the CD-ROM drive on your computer .
72 3 Figur e 68 shows an example Discovered Dev ices screen. Highlight the Cable/DSL Secur e Gateway by clicking on it, and press Next . Figure 69 Discov ery Finish Screen 4 Click on Finish to launch a web br owser and display the login page for the Gateway .
73 IP A DDR ESSING The Internet Protocol Suite The Internet protocol suite consis ts of a well-defined set of communications pr otocols and several standar d application protocols.
74 Ty p e Tw o In larger networks, wher e there ar e more devices, th e IP address of ‘192.168.100.8’ is, again, split into two parts but is structured differ ently: ■ Part one (‘192.168’) identifies the network on which the device r esides.
75 Auto-IP Addr essing Network devices use automatic IP addr essing if they are configur ed to acquire an addr ess using DHCP but ar e unable to contact a DHCP server . Automatic IP addressing is a scheme where devi ces allocate themselves an IP addr ess at random from the industry standar d subnet of 169.
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77 T ECHNICAL S PECIFICATIONS This section lists the technical specifica tions for the OfficeConnect Cable/DSL Secure Gateway . Interfaces Cable or DSL modem connection - one 10/100 Mbps Ethernet port (10BASE-T/100 BASE-TX) with auto-MDIX. LAN connection - four 10/100 Mbps Ether net ports (10BASE-T/100BAS E-TX) with auto-MDIX.
78 System Requir ements Operating Systems The Cable/DSL Secur e Gateway will support the followin g Operating Systems: ■ Windows 95, 98, Me ■ Windows NT 4.0 ■ Windows 2000 ■ Windows XP ■ Mac OS 8.5 or higher ■ Unix Ethernet Performance The Cable/DSL Secur e Gateway complies to the IEEE 802.
79 S AFETY I NFORMATION Important Safety Inform ation WAR NI NG : W arnings contain directions that you must follow for your personal safety . Follow all directions carefully .
80 VORSICHT : Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein. Die Stromversorgung des Geräts kann nur durch Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen werden. VORSICHT : Der Betrieb dieses Geräts erfolgt unter den SEL V -Bedingungen (Sicherheitskleinstspannung) gemäß IEC 60950.
81 si l'équipement auquel il est raccordé fonctionne dans les mêmes conditions. A VERTISSEMENT : Il n’y a pas de partie s remplaceables par les utilisateurs ou entretenues par les utilisateurs à l’intérieur du moyeu.
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83 E ND U SER S OFTWAR E L ICENCE A GR EEMENT 3Com Corporation END USER SOF TW ARE LICENSE AGREEMENT YOU SHOULD CAREFULLY READ THE FOLLOWING TERMS AND CON DITIONS BEFORE DOWNLOADING, INSTAL LING AND USING TH IS PRODUCT, THE US E OF WHICH IS LICENSED BY 3COM CORPORATION ("3COM") TO ITS CUSTOMERS FOR THEIR USE ONLY AS SET FORTH BELOW.
84 such termination you agree to destroy the Software and Do cumentation, together with all copies and merged portions in any form. LIMITED WARRANTIE S AND LIMITATION OF LIAB ILITY: All warrant ies an.
85 ISP I NFORMATION Information Regar ding Popular ISPs Intern et Connection Ty p e s Characteristics Popular ISPs Dynamic IP (Clone MAC) Cable modem ISP , non-hostname based.
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87 G LOSSARY 10BASE- T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE- TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable.
88 software that runs on Windows NT Server , and Windows 95 and Windows 98 will call the server to obtain the addr ess. W indows 98 will allocate itself an addr ess if no DHCP server can be found. DNS Domain Name System. DNS all ows Internet host computers to have a domain name (such as 3com.
89 IETF Internet Engineering T ask Force . An organization responsib le for providing engineering solutions for TCP/IP networks. In the network management ar ea, this gro up is responsible for the development of the SNMP pr otocol. IP Internet Protocol.
90 Network A Network is a collection of computers and other computer equipment that ar e connected for the purpose of exchanging information or sharing r esources.
91 TCP/IP is now supported on almost all platforms, and is the protocol of the Internet. TCP relates to the content of the data travel ling through a network — ensuring that the information sent arrives in one piece when it reach es its destination.
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93 I NDEX Numbers 100BASE-TX 87 10BASE-T 87 3DES defined 87 upgrading to 63 A access rights 48 adding special appli cations 50 address TCP/IP 73 admin passwor d 23 changing 34 advanced settings 52 alert LED 12 Apple Macintosh.
94 digital subscriber line 88 disabling IPSec 56 disabling PPPoE cli ent software 20 disabling th e firewa ll 52 disabling web pr oxies 21 discovery application 71 DMZ virtual 46 DNS 88 domain name sy.
95 Internet settings blocking access 48 configuring 38 DHCP 41 PPPoE 42 static addr ess 40 wizard 26 inventor y 11 IP addr ess 73 IP defined 89 IPSec defined 89 IPSec Routes editing 60 ISP defined 89 .
96 P package contents 11 passwor d changing 34 system 23 wizard 24 PC privileges setting 47 PING allowing 52 port cable/DSL Ethernet 13 LAN Ethernet 13 positioning the Gate way 15 power adapter socket.
97 adding 50 custom 50 static addre ss recor ding settings 16 static Internet settings 40 status viewing 64 status LED cable/DSL 13 LAN 12 subnet mask 36, 90 support 65 switch 90 system password 23 sy.
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99 R EGULATORY N OTICES FCC Statement This equipment has b een tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FC C Rules, and the Canadian Department of Communications Equipment Standards en titled , “Digital Apparatus,” ICES-003.
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DUA08569-5AAA02 Published November 2002 dua 08 569 - 5aa a02. b o o k Pag e 102 T hur s day , No ve m b er 7 , 2002 3: 09 PM.
An important point after buying a device 3Com 3CR856-95 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3Com 3CR856-95 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 3Com 3CR856-95 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3Com 3CR856-95 you will learn all the available features of the product, as well as information on its operation. The information that you get 3Com 3CR856-95 will certainly help you make a decision on the purchase.
If you already are a holder of 3Com 3CR856-95, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3Com 3CR856-95.
However, one of the most important roles played by the user manual is to help in solving problems with 3Com 3CR856-95. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3Com 3CR856-95 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
