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background image

What is Web Client Blocking?

77

to this website has been denied. If you do not agree with this site being
blocked, please contact extension 1234”.

To customize the response using the Web interface:

1

Click

Device View

on the Toolbar.

2

Select

System

->

Caching

->

Customize Response

in the Navigation

Tree.

3

Enter up to 512 characters of text or HTML code in the

Add This Text

field

that you want to add to the response screen that informs the end user
that access has been denied. The text or HTML that you enter will be
appended to the standard text that appears, which is “You are not
authorized to view this page”. You cannot change or delete this standard
text.

4

If you want to view your changes before saving them to check that your
text or HTML is correct, click

Preview

.

Click

OK

to save the text or HTML code that you have entered.

There is a default option in Microsoft Internet Explorer 4 and later
versions that will cause a “friendly HTTP error message” to be displayed
when a Web site is blocked, rather than the response page generated by
the Webcache. You can turn this setting off by selecting

Tools -> Internet

Options -> Advanced

and unchecking

Show friendly HTTP error

messages

. The response page generated by the Webcache will never be

displayed by Internet Explorer if you do not change this setting. The
following Microsoft knowledgebase article describes the use of friendly
HTTP-status error messages:

http://support.microsoft.com/support/kb/articles/Q218/1/55.A

SP

What is Web Client
Blocking?

Web Client Blocking allows you to control which client machines in your
network can access the Web through the Webcache. If you enable Web
Client Blocking, you can enter the static IP addresses or IP address ranges
of client machines that you want to allow access to the Web through the
Webcache. Web access from all other client machines will be denied by
the Webcache.

Dynamic Host Configuration Protocol (DHCP) servers can be used with
Web Client Blocking in two ways:

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Содержание 3C16115-US - SuperStack 3 Webcache 1000

Страница 1: ...http www 3com com Part No DUA1611 5AAA02 Published May 2001 SuperStack 3 Webcache 1000 3C16115 Webcache 3000 3C16116 User Guide ...

Страница 2: ...on of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com and SuperStack are registered trademarks of 3Com Corporation The 3Com logo and CoreBuilder are trademarks of 3Com Cor...

Страница 3: ... Front View Detail 19 LEDs 19 Webcache Rear View Detail 20 Power Socket 20 Console Port 20 WAN Port 21 LAN Port 21 WAN and LAN Port LEDs 21 Default Settings 22 2 INSTALLING THE WEBCACHE Package Contents 26 Choosing a Suitable Site 26 Rack Mounting the Webcache 27 The Power up Sequence 31 Powering up the Webcache 31 Checking for Correct Operation of LEDs 32 Solving Problems Indicated by LEDs 32 Dep...

Страница 4: ...Cables 44 Connecting the Webcache 44 Network Configuration Concepts 45 IP Addresses 45 Subnets and Using a Subnet Mask 46 Default Router 46 Domain Name System 47 Domain Name System Syntax 47 3 CONFIGURING WEB BROWSERS Manual Configuration 49 Proxy Auto Configuration PAC File Scripts 50 Web Proxy Auto Discovery WPAD 53 Web Proxy Auto Discovery Resources 54 Third party Tools 54 II WEBCACHE FEATURES ...

Страница 5: ...CURITY What are Passwords 71 Setting Passwords 71 What is Password Recovery 72 Enabling Disabling Password Recovery 72 Performing Password Recovery 73 7 CONTROLLING AND MONITORING WEB ACCESS What is Web Site Blocking 75 Configuring Web Site Blocking 76 Customizing the Response 76 What is Web Client Blocking 77 Configuring Web Client Blocking 78 What is Access Logging 79 Configuring Access Logging ...

Страница 6: ...2 System Log 93 Configuring the System Log 93 What is a Syslog Server 94 Obtaining a Syslog Server 94 Viewing the System Log 95 11 SOFTWARE UPGRADE AND INSTALLATION What is a Software Upgrade 97 Software Upgrade SNMP Traps 98 Unsuccessful Software Upgrades 98 Detecting Software Upgrades 98 Performing a Software Upgrade 99 What is a Software Installation 102 Unsuccessful Software Installations 102 ...

Страница 7: ...ying and Changing IP related Information 117 Specifying Basic IP Configuration 118 Specifying Domain Name System Configuration 118 Resetting IP Information to Factory Default Settings 119 Pinging Other Devices 119 Displaying IP Summary Information 120 Tracing IP Addresses 120 Displaying and Changing Security Information 121 Changing the Admin Password 121 Enabling and Disabling Password Recovery 1...

Страница 8: ...ON Important Safety Information 140 Consignes importantes de sécurité 142 Wichtige Sicherheitsinformationen 144 B CABLE SPECIFICATIONS AND PIN OUTS Cable Specifications 147 Pin outs 148 Null Modem Cable 148 PC AT Serial Cable 148 Modem Cable 149 RJ 45 Pin Assignments 149 C TECHNICAL SPECIFICATIONS D TECHNICAL SUPPORT Online Technical Services 153 World Wide Web Site 153 3Com Knowledgebase Web Serv...

Страница 9: ...Returning Products for Repair 156 GLOSSARY INDEX 3COM END USER SOFTWARE LICENSE AGREEMENT GNU GENERAL PUBLIC LICENSE VERSION 2 JUNE 1991 REGULATORY NOTICES ...

Страница 10: ......

Страница 11: ...inistrator who is responsible for installing configuring and managing the network It assumes a basic working knowledge of local area network LAN and wide area network WAN operations If release notes are shipped with your product and the information there differs from the information in this guide follow the instructions in the release notes Most user guides and release notes are available in Adobe...

Страница 12: ...he syntax provided and then supply the appropriate values for the placeholders that appear in angle brackets Example To change your password use the following syntax system password password In this example you must supply a password for password Commands The word command means that you must enter the command exactly as shown and then press Return or Enter Commands appear in bold Example To reboot...

Страница 13: ...n problems There are other publications you may find useful such as Documentation accompanying 3Com Network Supervisor This is supplied on the CD ROM that accompanies the Webcache Documentation Comments Your suggestions are very important to us They 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...

Страница 14: ...we can only respond to comments and questions about 3Com product documentation at this e mail address Questions related to technical support or sales should be directed in the first instance to your network supplier Product Registration You can now register your SuperStack 3 Webcache on the 3Com Web site http support 3com com registration frontpg pl ...

Страница 15: ...I GETTING STARTED Chapter 1 Introducing the Webcache Chapter 2 Installing the Webcache Chapter 3 Configuring Web Browsers ...

Страница 16: ...16 ...

Страница 17: ...your network Reduced Network Traffic The Webcache locally stores frequently accessed Web content and quickly serves it to the end user on demand This reduces the amount of traffic on the WAN providing significant cost benefits by reducing the bandwidth requirement on expensive WAN links Reduced Web Latency The end user receives Web content more quickly and with greater quality of service if it is ...

Страница 18: ...Network Supervisor The latest version of 3Com Network Supervisor is supplied on the CD ROM that accompanies the Webcache 3Com Network Supervisor provides powerful intuitive network management for small to medium enterprise networks It automatically discovers network devices and reports network activity stress monitoring and performance metrics for network managers This information helps to provide...

Страница 19: ... solving see Solving Problems Indicated by LEDs on page 32 Table 3 LED Behavior SuperStack 3 3C16116 Webcache 3000 Power Self test Activity Activity LED Power Self test LED Cache Storage Status green ok yellow failed green 100 Mbps yellow 10 Mbps Link Status Cache Storage Status LED s 3 1 2 Cache Storage Status 3 2 Link Status Activity Link Status LED s LAN LAN LAN WAN LED Color Indicates Cache St...

Страница 20: ...ache automatically adjusts its power setting to any supply voltage in the range 90 240 VAC Console Port The console port allows you to connect a terminal terminal emulator or modem and perform remote or local out of band management The Activity LED Green flashing The cache is active and caching is occurring Off The cache is not active This is normal behavior for an idle Webcache Power Self test LE...

Страница 21: ... 45 port It is used to connect the Webcache to the network in either Proxy or Transparent deployment environments Web network traffic travels to and from the Webcache via the LAN port For more information see Deploying the Webcache in Your Network on page 33 You must connect the LAN port to your network using an appropriate network cable For more information see the Cable Specifications and Pin ou...

Страница 22: ...n Flashing Packets are being transmitted received on the port Green Off No link is present Link Speed LED Yellow On A Fast Ethernet speed 100 Mbps link is present Yellow Off An Ethernet speed 10 Mbps link is present Feature Webcache 1000 3000 Port Speed 10BASE T 100BASE TX Mbps ports are auto negotiated Duplex Mode 10BASE T and 100BASE TX ports are auto negotiated Flow Control Enabled with auto ne...

Страница 23: ...ain All other settings are reset to the default values shown in Table 5 Caching Port 8080 Access Logging Disabled Web Site Blocking Disabled Web Client Blocking Disabled Simple Network Management Protocol SNMP Enabled but requires configuration Network Time Protocol NTP Disabled Web Browser Auto Configuration Disabled Upgrade Notification Enabled but requires configuration Upgrade Detection Downlo...

Страница 24: ...24 CHAPTER 1 INTRODUCING THE WEBCACHE ...

Страница 25: ...ing any components from the Webcache 1000 3000 or carrying out any maintenance procedures you must read the safety information provided in Appendix A of this guide AVERTISSEMENT Consignes de sécurité Avant d installer ou d enlever tout composant du Webcache 1000 3000 ou d entamer une procédure de maintenance lisez les informations relatives à la sécurité qui se trouvent dans l Appendice A de ce gu...

Страница 26: ... equipment room a server room or telecommunications room A rack mounting kit is supplied with the Webcache CAUTION Ensure that the ventilation holes in the Webcache are not obstructed When deciding where to position the Webcache ensure that Cabling is located away from sources of electrical noise such as radios transmitters and broadband amplifiers power lines and fluorescent lighting fixtures The...

Страница 27: ...through the use of a 19 inch 4 posted rack CAUTION Disconnect all cables from the Webcache before continuing To rack mount your Webcache 1 Place the Webcache the right way up on a hard flat surface with the front facing towards you 2 Locate the Rack Mounting Kit that is supplied with the Webcache The Kit contains the items shown in Figure 4 Figure 4 The Rack Mounting Kit Contents You must use the ...

Страница 28: ... INSTALLING THE WEBCACHE 3 Attach a rack mounting bracket to each side of your Webcache using 4 of the screws provided for each bracket as shown in Figure 5 Figure 5 Fitting a Rack Mounting Bracket to the Webcache ...

Страница 29: ... To do this a Slide the adjustable bracket onto the rack mounting rail and attach it using two of the screws provided at a position suitable for your rack b Use rack nuts not supplied to attach the rack mounting rail and adjustable bracket assembly to the rear of your rack Figure 6 Fitting a Rack Mounting Rail to the Rear of the Rack ...

Страница 30: ... To do this a Insert two screws through aligned openings in the front plate rack and rack mounting rail as shown in Figure 7 b Tighten the screws with a suitable screwdriver Figure 7 Fitting a Rack Mounting Rail to the Front of the Rack 6 Repeat step 4 and step 5 for the other side of the rack ...

Страница 31: ...ections describe how to get your Webcache powered up and ready for operation Powering up the Webcache Use the following sequence of steps to power up the Webcache 1 Plug the power cord into the power socket at the rear of the Webcache 2 Plug the other end of the power cord into your power outlet 3 The Webcache automatically powers up which takes approximately 60 90 seconds During power up all of t...

Страница 32: ...oblems Indicated by LEDs Color State Green The Webcache is powered up and operating normally Green flashing The Webcache is either powering up or performing a software upgrade Yellow The Webcache is powered up but is not caching a failure has occurred Off The Webcache is not powered up This may also indicate a power failure Problem Suggested Solution The Power Self test LED does not light Check th...

Страница 33: ...at you deploy your Webcache on the LAN side of a firewall or on the SuperStack 3 Firewall s DMZ port as described in Deploying the SuperStack 3 Firewall as a Proxy Forwarder on page 35 The term Web requests refers to three types of network traffic HTTP HTTPS SSL encrypted and HTTP FTP The Webcache can accept all of these traffic types In Proxy Cache mode you should configure the Web browser on eac...

Страница 34: ...ct its Web requests to the Webcache You can avoid this loss of access to the Web by using Proxy Auto Configuration PAC files to configure the Web browser on each client machine The PAC file can instruct the browser to go directly to the Web if the Webcache is not available For more information see page 50 Transparent Cache Figure 10 Transparent Cache Deployment In the Transparent Cache deployment ...

Страница 35: ...Proxy Cache if you change the Webcache to a Transparent Cache deployment This allows you to gradually migrate the client machines in your network from a pure Proxy Cache configuration to a pure Transparent Cache configuration by changing the Web browsers to Transparent Cache mode as required Deploying the SuperStack 3 Firewall as a Proxy Forwarder The following example describes how to install the...

Страница 36: ... enter the IP address of your Webcache c In the Proxy Web Server Port field enter the number 8080 d Click Update to save your changes 3 No configuration is necessary on the client machines The Firewall will intercept any HTTP requests for external URLs and will forward the traffic to the Webcache Setting Up the Webcache for Management You can quickly set up the Webcache for management in two ways ...

Страница 37: ...System Time chapter on page 67 You can choose to enter the system time manually instead of using NTP A Host Name The Host Name is combined with the Domain Name System domain to give the internet name of the Webcache The host name is the name of the Webcache within the local domain A Domain Name System DNS domain The Domain Name System domain is combined with the Host Name to give the internet name...

Страница 38: ...by trying to browse the World Wide Web if you can browse an IP stack is installed If you do not have access to the World Wide Web you can check that the IP stack is installed by pinging another device in your network For more information see Pinging Other Devices on page 91 Setting Up Using a Cross over Cable Alternatively you can directly connect a client machine to the Webcache by attaching a cr...

Страница 39: ...ettings Also the Web interface has been optimised for PC screens with the desktop area set to 800 by 600 pixels 3Com recommends that you set the font size to Small Fonts 2 In the Location Address field of the browser enter the URL of the Webcache This must be in the format http nnn nnn nnn nnn 8081 where nnn nnn nnn nnn is the IP address of the Webcache and 8081 is the port on which the Webcache l...

Страница 40: ...he for management via the Command Line Interface by running a Telnet session on a management workstation that is connected to the Webcache over your test network or locally via a console port connection Setting Up Over the Test Network The Webcache is pre configured with a default IP address which is within the range of addresses reserved by the IETF for private IP networks This default address al...

Страница 41: ...inging Other Devices on page 91 Setting Up Through the Console Port Alternatively you can directly connect a client machine to the Webcache by attaching a null modem cable to the console port on the rear panel For more information see Webcache Rear View Detail on page 20 Figure 16 Setting Up Through the Console Port To connect to the Webcache via the console port 1 You must connect a terminal or t...

Страница 42: ... is started If the login sequence does not begin immediately press Return a few times until it does begin If the sequence still does not begin see Solving Command Line Interface Problems on page 133 2 At the Login and Password prompts enter your user name and password For further information see Logging in as a Default User on page 58 3 If you have logged on correctly the Top level menu of the Com...

Страница 43: ...Brown IP Address A unique IP address for the Webcache 192 168 1 253 192 168 1 253 Subnet Mask A suitable Subnet Mask for the Webcache none 255 255 255 0 Default Router IP Address The IP address of the default IP router gateway in your network none 192 168 2 0 DNS Server IP Address The IP address of the Domain Name System DNS server in your network none 192 168 25 0 Host Name The Host Name is combi...

Страница 44: ... to a 10BASE T 100BASE TX port on a suitable switch or hub in your network The switch or hub that you connect the Webcache to is determined by the deployment environment that you choose for further information see Deploying the Webcache in Your Network on page 33 Password A password for the admin user name which you must enter whenever you manage the Webcache via the Web interface or Command Line ...

Страница 45: ...ple identifies the device within the network If your network is internal to your organization only you may use any arbitrary IP address We suggest you use addresses in the series 192 168 100 X where X is a number between 1 and 254 with a subnet mask of 255 255 255 0 These suggested IP addresses are part of a group of IP addresses that have been set aside specially for use in house only CAUTION If ...

Страница 46: ...t the bit as part of the device number If you are unsure about what mask to use 3Com suggest that you contact your network administrator Default Router A Router is a device on your network which is used to forward IP packets to a remote destination An alternative name for a Router is a Gateway Remote refers to a destination device that is not directly attached to the same network segment as the so...

Страница 47: ...correct IP address e g 128 118 2 23 allowing the two devices to communicate with each other To enable the Domain Name System you must setup a DNS server on your network If you are uncertain about how to do this contact your network administrator The following Webcache features are only available if you have setup a DNS server Access to the Webcache by DNS Name You can access the Web interface or C...

Страница 48: ...must be at least 1 character long The domain name must not exceed 63 characters long The domain name must be comprised of alphanumeric characters hyphens and _ underscores You cannot enter a domain name starting or ending with a dot character It must start and end with a letter or number Each part of the domain name known as a label must be separated with a single dot You cannot enter a domain nam...

Страница 49: ...t machines is required for a Webcache transparent cache deployment for more information see Transparent Cache on page 34 Manual Configuration You can manually configure the Web browser on each client machine to explicitly direct its Web requests to the Webcache To manually configure Internet Explorer 5 1 Open Internet Explorer 2 From the Tools menu click Internet Options 3 Click the Connections ta...

Страница 50: ...y server In Internet Explorer select Tools Internet Options Connections LAN Settings and disable Use a Proxy Server In Netscape select Edit Preferences Advanced Proxies and select Direct Connection to the Internet Proxy Auto Configuration PAC File Scripts You can use a Proxy Auto Configuration PAC file to configure the Web browser on each client machine PAC files allow you to create configuration ...

Страница 51: ...le is not ticked in the Browser Auto Configuration screen If this box is ticked the Web browser will bypass the Webcache entirely after reading the Browser Auto Configuration file and will never be blocked To use the Webcache as a PAC file server first configure the Webcache PAC file using the Browser Autoconfiguration screen 1 Log in to the Web interface 2 Click Device View on the Toolbar 3 Selec...

Страница 52: ...168 1 253 The port number on which the Webcache always serves PAC files is 8082 you cannot change this port number 7 Click OK To set Netscape Navigator 4 5 1 Open Netscape Navigator 2 From the Edit menu click Preferences 3 Click the Advanced category and click Proxies 4 Select Automatic Proxy Configuration 5 Enter the URL or location of the Webcache in the Configuration location field in the follo...

Страница 53: ... removes subdomains until it either finds a WPAD server answering the domain name or reaches the third level domain For example Web browsers on client machines in the a b 3Com com domain would query wpad a b 3Com wpad b 3Com com and then wpad 3Com com If a WPAD server is found the Web browser downloads and executes the PAC file and configures the browser settings You must define your network Domai...

Страница 54: ... the Web Proxy Auto Discovery Protocol at http www ietf org internet drafts draft cooper webi wpad 0 0 txt correct at time of publishing Third party Tools There are applications from many vendors that can help you to manage networks of client machines Microsoft offers the Internet Explorer Administration Kit and Systems Management Server which allow you to remotely configure Web browsers and Proxy...

Страница 55: ...ing the Webcache Chapter 5 System Time Chapter 6 Security Chapter 7 Controlling and Monitoring Web Access Chapter 8 System Events Chapter 9 Performance Monitoring Chapter 10 System Diagnostics Chapter 11 Software Upgrade and Installation ...

Страница 56: ...56 ...

Страница 57: ...he Banner The Toolbar The Navigation Tree The Information Area Management Software Interfaces You can manage the Webcache using the Web interface management software This is an internal set of Web pages that allow you to manage the Webcache using a Web browser that has Javascript enabled Refer to the Webcache Online Help for detailed information about the Web interface The Webcache also has a Comm...

Страница 58: ...erface 1 Open the Web browser on the management workstation To display the Web interface correctly use one of the following Web browsers Microsoft Internet Explorer v4 0 Microsoft Internet Explorer v5 0 Microsoft Internet Explorer v5 5 Netscape Communicator v4 5 Netscape Communicator v4 6 Netscape Communicator v4 7 Netscape Navigator version 6 is not supported by the Webcache For the browser to op...

Страница 59: ...ing your browser 192 168 1 253 is the default IP address of the Webcache In Netscape you can enter a shortened URL such as 192 168 1 253 8081 and Netscape successfully accesses the Webcache In Internet Explorer however this URL is not recognized You must include http at the start of the URL i e http 192 168 1 253 8081 3 When the browser has located the Webcache a user name and password screen is d...

Страница 60: ...ndow underneath the Banner It contains three buttons which allow you to select different views in the View Area The Navigation Tree This is always displayed on the left side of the browser window It contains various icons which allow you to manage your Webcache The Information Area This is always displayed on the right side of the browser window It contains information about the managed Webcache T...

Страница 61: ...face The Summary View Click Summary on the Toolbar to access the Summary View This is the default view when you first browse to the Webcache and when you click the browser Refresh button Click the System icon in the Navigation Tree to update the Information Area with the latest summary information for the Webcache The summary information is displayed in a table Device Summary The table is entitled...

Страница 62: ...evice mimic is periodically updated to reflect changes in the Webcache You can also perform certain operations by clicking on parts of the device mimic called hotspots Console Port Hotspot The Console Port on the mimic is a hotspot Click the port to open a pop up menu that contains an operation which you can launch for the console port The operation is Setup Console Port LAN Port Hotspot The LAN P...

Страница 63: ...ee contains five options that allow you to access additional information from the 3Com Web site Your management workstation must have access to the Web for the first four options to work Click Contacts to display contact information from the 3Com Web site in a new browser window Click Home Page to display the Home page of the 3Com Web site in a new browser window Click Library to display the Onlin...

Страница 64: ...he following table shows the various Navigation Tree symbols and their associated behavior Symbol Behavior Indicates that the next level of the Navigation Tree hierarchy is currently expanded Click the symbol to collapse the next level This only affects the Navigation Tree no changes are made to the Information Area Indicates that the next level of the Navigation Tree hierarchy is currently collap...

Страница 65: ...selected the Device Mimic and the Device Summary table are displayed If the Help View is currently selected specification guidelines for running the Web interface are displayed Click the symbol to update the Information Area with the latest summary information for the Stack and the units within it This symbol is only available in the Summary View Click the symbol to perform an operation by opening...

Страница 66: ...66 CHAPTER 4 MANAGING THE WEBCACHE ...

Страница 67: ...ime during the Getting Started wizard which automatically runs when you first access the Webcache s Web interface You can change how the Webcache determines the current time at any point using the Time Configuration wizard Select System Management Time Configuration in the Navigation Tree to access the wizard You can configure the system time in either of the following ways Configuring the System ...

Страница 68: ...ess to an NTP server you can configure the Webcache to determine the current time using NTP see Configuring the System Time Using the Network Time Protocol on page 69 for more information Public NTP servers are grouped into stratums The NTP primary stratum 1 servers are connected to a reference clock which is typically an expensive cesium clock or cheaper GPS receiver Servers operating at stratum ...

Страница 69: ... in the Web interface 1 Select a timezone from the options in the Timezone drop down list The Webcache automatically performs daylight savings adjustments according to the timezone that you have selected 2 Choose Manual Time Configuration by clicking the appropriate radio button 3 Enter the current day month year and the current time in 24 hour clock format in the appropriate fields 4 Click Apply ...

Страница 70: ...70 CHAPTER 5 SYSTEM TIME A Warning window appears asking if you want to continue with the system time change Click Yes to continue and reset the Performance Graphs or No to cancel the change ...

Страница 71: ...ord as described in Logging in as a Default User on page 58 CAUTION To prevent unauthorized access and configuration of the Webcache 3Com recommends that you set a password for the admin username as soon as possible Setting Passwords To set the password using the Web interface you need to login as the admin user and select Security Set Password in the Navigation Tree to access the Password Configu...

Страница 72: ... Setting the password is automatically set to the default for the admin user account no password What is Password Recovery If you forget the password for the admin user account you will no longer be able to perform important management operations on the Webcache Password Recovery allows you to define a new password for the admin account even though you have forgotten the current one and regain acc...

Страница 73: ...cess the Command Line Interface and enter the username recover and password recover to place the Webcache in password recovery mode The Webcache remains in password recovery mode for a maximum of 30 seconds before it returns to the CLI login prompt 2 Reboot the Webcache whilst it is in password recovery mode by removing the power cord from the power socket at the rear of the Webcache and reinserti...

Страница 74: ...74 CHAPTER 6 SECURITY ...

Страница 75: ...ite Blocking Web Site Blocking allows you to control which Web sites can be accessed through the Webcache If you enable web site blocking you can enter the domain names of Web sites that you want to either allow or deny access to You can specify one of two blanket rules with exceptions either Deny access to all sites except the ones that you enter or Allow access to all sites except the ones that ...

Страница 76: ... to block access to that entire domain or enter auctions yahoo com to block access to that subdomain Domain Name Rules You cannot enter a domain starting with http You cannot enter a domain containing the forward slash character You cannot enter a domain containing a space character You cannot enter a domain starting or ending with a dot character The domain must start and end with a letter or num...

Страница 77: ...rer 4 and later versions that will cause a friendly HTTP error message to be displayed when a Web site is blocked rather than the response page generated by the Webcache You can turn this setting off by selecting Tools Internet Options Advanced and unchecking Show friendly HTTP error messages The response page generated by the Webcache will never be displayed by Internet Explorer if you do not cha...

Страница 78: ...ecific client machine IP addresses or ranges of IP addresses as appropriate Configuring Web Client Blocking To configure Web Client Blocking using the Web interface 1 Log in to the Web interface 2 Click Device View on the Toolbar 3 Select System Caching Client Machine Blocking in the Navigation Tree 4 Check Block Access From All Web Clients to enable Web Client Blocking 5 In the Except these IP Ad...

Страница 79: ...s Access Logging Access Logging allows you to track which client machines have accessed which Web sites through the Webcache By default Access Logging is disabled If you enable Access Logging you must specify a FTP server that you want to periodically save the log to The log is saved to the FTP server whenever the log is approaching full or every 6 hours whichever comes first You can see a complet...

Страница 80: ...ectory can only contain alphanumeric and or _ characters and can only be up to 32 characters in length 8 In the Username field enter the user name for the FTP server that you want to save the access logs to 9 In the Password field enter the password for the username entered in step 8 The password must be between 1 and 32 characters in length When a password has been set is displayed in the Passwor...

Страница 81: ...he FTP server Viewing the Access Log To view the Access Log using the Web interface 1 Log in to the Web interface 2 Click Device View on the Toolbar 3 Select System Caching View Access Log in the Navigation Tree 4 The last 256 lines of the Access Log are displayed Click Refresh to update the information that is displayed If the Webcache is deployed in Proxy mode multiple entries for the pages in t...

Страница 82: ...82 CHAPTER 7 CONTROLLING AND MONITORING WEB ACCESS 3Com recommends that you use Webtrends Log Analyzer to analyze the access logs that the Webcache produces http www webtrends com ...

Страница 83: ...respond more quickly to Webcache events and helps save you valuable time and effort It is an important element in the remote management of the Webcache Email Notification You can configure the Webcache to automatically send emails to specified email accounts when certain significant system events occur The emails are generated internally within the Webcache in a fixed format that is also used by 3...

Страница 84: ...e server 3Com recommends that you use the domain name of the Webcache as the email address If you have entered webcache as the host name and mycompany com as the DNS domain name of the Webcache then you would enter webcache mycompany com as the email address 7 In the To Addresses to Receive Notifications field enter the addresses of all the email accounts that will receive the email notifications ...

Страница 85: ... that the Webcache supports The Webcache supports the following MIB 2 standard MIB and Webcache MIB traps Table 11 SNMP Traps SNMP Trap Description Cold Start The Webcache is reinitailizing itself such that its system configuration may be altered Login Failed The admin user has failed to login to the Webcache or a user name other than admin has been entered Upgrade Completed Successfully A Softwar...

Страница 86: ...on in your network that will handle the SNMP traps in the IP Address of Management Station field The community string of the network management station is set to monitor You can only change this default setting using the Command Line Interface for more information see Setting the Webcache SNMP Community String on page 124 Caching Disk Failed A cache storage device within the Webcache has failed Yo...

Страница 87: ...andwidth savings hit miss rate request rate response time and throughput for the Webcache You can use them to find out quickly and accurately how the Webcache is performing and how much value it is providing to your network The System Performance and I O Performance graphs show more detailed information which is intended for use by your System Administrator and 3Com support personnel Performance m...

Страница 88: ...igh hit rate indicates more efficient operation as the Webcache is saving requests from being sent to the Web which speeds up response time and reduces bandwidth use A reasonable hit rate is 40 60 The hit rate that the Webcache achieves is largely dependant upon How frequently the same request is made The hit rate will be low if there is no revisiting of sites Caching only works well if the same r...

Страница 89: ...strator and 3Com support personnel To view the System Performance graphs 1 Log in to the Web interface 2 Select Performance Graphs in the Navigation Tree 3 Select System Performance Graphs from the available graph types Select one of the three available time periods Daily Weekly or Monthly by clicking the appropriate radio button 4 Click OK The System Performance graphs show the following informat...

Страница 90: ...s per second to the caching disk s Network Packets sec 1 The average number per second of TCP packets sent to and received by the Webcache New TCP Connection sec 1 The average number per second of TCP connections established by the Webcache DNS Lookups sec 1 The average number per second of Domain Name System DNS server requests sent to the Webcache DNS Hit Rate The average percentage of Domain Na...

Страница 91: ...network Trace Route Trace the network hops to a device on your network System Log View information about the Webcache Pinging Other Devices The PING feature allows you to send out a PING request to test whether devices on an IP network are accessible and functioning correctly This feature is useful to diagnose connectivity problems such as a failed network device between the Webcache and the web s...

Страница 92: ...ws you to display the network hops from the Webcache to a device on an IP network This feature is useful to diagnose connectivity problems such as a failed network device between the Webcache and the web server being accessed Performing a Trace Route To perform a trace route to a device using the Web interface 1 Log in to the Web interface 2 Click Device View on the Toolbar 3 Select Protocol Ping ...

Страница 93: ...nterface 1 Log in to the Web interface 2 Click Device View on the Toolbar 3 Select Diagnostics Setup System Log in the Navigation Tree The Setup System Log screen is displayed 4 You can choose to save the contents of the System Log onto a single management station in your network that has syslog analysis tools This is of particular benefit if you are working with 3Com support personnel Enter the I...

Страница 94: ...ut Microsoft Windows does not include one Obtaining a Syslog Server The CD ROM contains a freeware application called 3CDaemon that allows you to configure a Syslog and TFTP server on a Microsoft Windows server You can use the 3CDaemon syslog server to capture syslog events from devices and machines on your network Note that 3CDaemon is provided without warranty by 3Com WebTrends Firewall Suite ha...

Страница 95: ...on the Toolbar 3 Select Diagnostics View System Log in the Navigation Tree The System Log screen is displayed The last 256 lines of the System Log are displayed Click Refresh to update the information that is displayed The System Log is primarily intended to be used by your System Administrator and 3Com support personnel to troubleshoot the Webcache ...

Страница 96: ...96 CHAPTER 10 SYSTEM DIAGNOSTICS ...

Страница 97: ...anagement software of the Webcache when a new version becomes available 3Com recommends that you always upgrade to the latest software version to take advantage of additional functionality bug fixes and features You can configure the Webcache to automatically detect and download new software versions and notify you of their availability via email notification for more information see Email Notific...

Страница 98: ... software upgrade is completed unsuccessfully the trap indicates that the upgrade has been unsuccessful and tells you why it failed For more information about SNMP Traps see SNMP Traps on page 85 Unsuccessful Software Upgrades The Webcache software upgrade process is robust and guards against an upgrade failure Should a software upgrade fail the Webcache will automatically revert to using the soft...

Страница 99: ...ng the new password The password must be between 1 and 32 characters in length The default password is Webcache hostname domainname If you set the DNS domain name to be mycompany com and the DNS host name to be mycache the default FTP password would be Webcache mycache mycompany com If the DNS host name and domain are not set the default password is Webcache If necessary you can change the FTP sit...

Страница 100: ...ftware version now Upgrade Later Select this to upgrade the Webcache to the new software version at a later time You will be reminded about the upgrade when you next log in to the Webcache as the Upgrade Software wizard will automatically open Discard Upgrade Select this if you do not want to upgrade the Webcache to the new software version You will not be reminded about the upgrade to this partic...

Страница 101: ...before you can perform a manual upgrade for more information see Detecting Software Upgrades on page 98 Also you can only perform a software upgrade if you have downloaded a newer software version than the one that is currently installed on the Webcache To do this 1 Log in to the Web interface 2 Click Device View on the Toolbar 3 Select System Control Upgrade Software in the Navigation Tree The fi...

Страница 102: ...iguration settings are lost after a software installation has been completed the Webcache is reset to its factory defaults For more information see Default Settings on page 22 To restore the settings after the installation is complete you must restore a system configuration file that you have previously saved This configuration file must have been saved on the same software version as the software...

Страница 103: ...ccessful screen is displayed when the software installation has been successful 8 Click Reboot to exit the Software Installation wizard and reboot the Webcache This will complete the software installation The Device View is displayed in the Web interface Saving and Restoring Configurations Saving and Restoring configurations is primarily intended to allow you to revert to a previous software versi...

Страница 104: ...e version All of the Webcache s configuration settings are lost after a software installation has been completed except the IP and DNS configuration You should now browse to the Webcache s Web interface and restore the system configuration file that you saved the last time the Webcache was running this older software version You would perform the Restore Configuration command to go back to a fully...

Страница 105: ...cation of the system configuration file for future reference You should repeat this for every configuration that you save 7 The Save Configuration screen in the Web interface does not close automatically when the save process has been completed Click Cancel to close the screen when the configuration has been saved You can exit the Save Configuration screen without saving a system configuration fil...

Страница 106: ...s currently running 5 Click Restore The restore process begins 6 The Restore Configuration Successful screen appears Click OK to reboot the Webcache and complete the restoration of the system configuration file The Device View is displayed in the Web interface You can exit the Restore Configuration screen without restoring a system configuration file by clicking Cancel instead of Restore ...

Страница 107: ...III COMMAND LINE INTERFACE Chapter 12 Command Line Interface ...

Страница 108: ...108 ...

Страница 109: ...g Started Displaying and Changing IP related Information Displaying and Changing Security Information Displaying and Changing Webcache Information and Functions Accessing the Command Line Interface You can access the Command Line Interface using A terminal or terminal emulator connected to the console port of the Webcache directly or through a modem A terminal or terminal emulator connected to the...

Страница 110: ...crews on the cable to prevent it from being loosened c Connect the other end of the cable to your terminal terminal emulator or modem Make sure that the terminal terminal emulator or modem have the same settings as the console port 8 data bits no parity 1 stop bit To configure the settings of the terminal terminal emulator or modem see the documentation that accompanies it You must configure the t...

Страница 111: ...olving Command Line Interface Problems on page 133 2 At the Login and Password prompts enter your user name and password For further information see Logging in as a Default User on page 58 To prevent unauthorized configuration of the Webcache 3Com recommends that you change the default password as soon as possible To do this using the Command Line Interface you need to log in as the default user a...

Страница 112: ...tion of its purpose The Command Area Contains a Select menu option prompt where you can enter the commands displayed in the menu area From the Top level menu you can access these sub menus GettingStarted command This command allows you to specify basic configuration settings for the Webcache Logout command This command allows you to logout of the Command Line Interface Protocol menu This menu cont...

Страница 113: ...otocol ip basicConfig from the Top level menu To enter commands that require values Append the values to the name of the command For example to display the system menu and change your password enter system password password If you do not specify values for a command that requires them you are prompted to enter the values At each prompt the default value is displayed in brackets To enter abbreviate...

Страница 114: ...anagement configuration protocol ip dnsConfig Specifies Domain Name System DNS configuration protocol ip initializeConfig Resets IP information to factory default settings protocol ip ping Pings other devices on your network protocol ip summary Displays IP summary information protocol ip traceRoute Traces the network hops to devices on your network security password Specifies the password for the ...

Страница 115: ...contact for the Webcache The name can be up to 80 characters long The following prompt is displayed Enter system location 4 Enter a physical location for the Webcache The location name can be up to 80 characters long The following prompt is displayed Enter IP address 192 168 1 253 5 Enter a valid IP address The following prompt is displayed Enter subnet mask 255 255 255 0 6 Enter a valid subnet ma...

Страница 116: ...anual manual 12 Enter either NTP Network Time Protocol or manual If you entered NTP the following prompt is displayed Enter NTP server IP address 0 0 0 0 Enter a valid NTP server IP address If you entered manual the following prompt is displayed Enter date dd mm yy Enter a valid date The following prompt is displayed Enter time hour min sec Enter a valid time The date and time are set as soon as y...

Страница 117: ...h summarises the selections that you have made Exiting the Command Line Interface You can exit the Command Line Interface at any time using the logout command on the Top level menu To exit the Command Line Interface at the Top level menu enter logout If a period of inactivity lasts longer than 30 minutes the Webcache will automatically log you out After the exit the first key that you press return...

Страница 118: ...ter a valid IP address The following prompt is displayed Enter Subnet mask 255 255 255 0 3 Enter a valid subnet mask The following prompt is displayed Enter Gateway IP address 196 168 100 2 4 Enter a valid gateway IP address Specifying Domain Name System Configuration You can use the dnsConfig command on the IP menu to configure the Domain Name System settings of the Webcache This command allows y...

Страница 119: ... the Webcache Pinging Other Devices The PING feature allows you to send out a PING request to test whether devices on an IP network are accessible and functioning correctly This feature is useful for testing that the Webcache is installed and set up correctly and that your network connections are working You can PING other devices on your network using the ping command on the IP menu To PING a dev...

Страница 120: ...uter 196 168 100 2 Host Name webcache Domain name mycompany com DNS address 196 168 100 3 Tracing IP Addresses The Trace Route feature allows you to display the network hops from the Webcache to a device on an IP network This feature is useful for testing that the Webcache is installed and set up correctly and that your network connections are working You can perform a trace route to other devices...

Страница 121: ...tion for the Webcache using the commands on the Security menu These commands allow you to Specify the password for the current user Enable and disable password recovery Changing the Admin Password You can change the password for the admin user using the password command on the Security menu To change the password you need to login as the admin user and then follow the steps below 1 At the Top leve...

Страница 122: ...lue enable disable enable Displaying and Changing Webcache Information and Functions You can display and change information about the Webcache using the commands on the System menu These commands allow you to Initialize the Webcache to factory default settings Reboot the Webcache Specify a contact name for the Webcache Specify location details for the Webcache Specify a name for the Webcache Speci...

Страница 123: ...ximately 60 90 seconds to initialize While the Webcache is initializing you cannot communicate with it Rebooting the Webcache You can reboot the Webcache using the reboot command on the Control menu To reboot the Webcache 1 At the Top level menu enter system control reboot The following prompt is displayed Are you sure you want to reboot the system yes no no 2 Enter yes if you wish to proceed or n...

Страница 124: ... is displayed Enter system location location 2 Enter a physical location for the Webcache The location name can be up to 80 characters long Specifying a Webcache Name You can specify a Webcache name using the name command on the Management menu To specify the name 1 At the Top level menu enter system management name The following prompt is displayed Enter system name system name 2 Enter a system n...

Страница 125: ...information 1 At the Top level menu enter system summary The administration details are displayed as shown in the example below The following read only fields are displayed System Name Displays the descriptive name or system name for the Webcache For information about assigning a new name see Specifying a Webcache Name on page 124 Location Displays the physical location of the Webcache For informa...

Страница 126: ...me Since Reset Displays the time that has elapsed since the Webcache was last reset initialized or powered up Software Version Displays the version number of the management software currently installed on the Webcache Hardware Version Displays the version number of the Webcache hardware MAC Address Displays the MAC Ethernet address of the Webcache Serial Number Displays the serial number of the We...

Страница 127: ...IV PROBLEM SOLVING Chapter 13 Problem Solving ...

Страница 128: ...128 ...

Страница 129: ...rectly configured to operate as a generic TTY terminal or a VT100 terminal You have performed the Command Line Interface wake up procedure by pressing Return a few times The settings on your terminal or terminal emulator are correct and match those set for the Webcache console port 8 data bits no parity 1 stop bit The Webcache only works with line speeds from 1200 to 19 200 baud The default line s...

Страница 130: ...he Port Activity LED on the Webcache LAN port is Green or Green Flashing The duplex settings are as expected by the rest of your network You can ping the Webcache The terminal or terminal emulator is set to VT52 or VT100 mode Press Return a few times to wake up the CLI Solving Web Interface Problems The Web interface is not displayed in the Web browser The Web interface can be accessed by any brow...

Страница 131: ... access the Web interface In Netscape you can enter a shortened URL such as 192 168 1 253 8081 and Netscape successfully accesses the Webcache In Internet Explorer however this URL is not recognized You must include http at the start of the URL i e http 192 168 1 253 8081 You are using Internet Explorer to manage multiple Webcaches and the Device Summary table is not updating If you are using Inte...

Страница 132: ...n in Microsoft Internet Explorer 4 and later versions that will cause a friendly HTTP error message to be displayed when a Web site is blocked rather than the response page generated by the Webcache You can turn this setting off by selecting Tools Internet Options Advanced and unchecking Show friendly HTTP error messages The Proxy Auto Configuration PAC file is ignored by the Web browser You must ...

Страница 133: ...e Protocol to prevent this If this is not possible reset the system time manually using the Time Configuration window Also check that the timezone is set correctly The Webcache fails to power up Check that The Power Self Test LED on the front panel is Yellow or Off possibly indicating a system error If so contact 3Com support personnel If no front panel LEDs are lit check the power connection to t...

Страница 134: ... between your client machines and your Webcache using the Ping command Check that the response time is reasonable Analyze your network to look for network errors If you are using Proxy Auto Configuration PAC files to configure browsers try setting the browser settings manually to avoid the overhead of PAC files If you are using the Web Proxy Auto Discovery WPAD protocol to configure the browsers o...

Страница 135: ...e Performance Problems 135 Local domain sites cannot be accessed using the Webcache as a proxy This is caused by an incorrect setting of the DNS domain name on the Webcache Check the DNS configuration of the Webcache ...

Страница 136: ...136 CHAPTER 13 PROBLEM SOLVING ...

Страница 137: ...V APPENDICES AND INDEX Appendix A Safety Information Appendix B Cable Specifications and Pin outs Appendix C Technical Specifications Appendix D Technical Support Glossary Index ...

Страница 138: ...138 ...

Страница 139: ... remove the unit AVERTISSEMENT Les avertissements présentent des consignes que vous devez respecter pour garantir votre sécurité personnelle Vous devez respecter attentivement toutes les consignes Nous vous demandons de lire attentivement les consignes suivantes de sécurité avant d installer ou de retirer l appareil WARNHINWEIS Warnhinweise enthalten Anweisungen die Sie zu Ihrer eigenen Sicherheit...

Страница 140: ...e socket outlet must be near to the unit and easily accessible You can only remove power from the unit by disconnecting the power cord from the outlet UK The supply plug must comply with BS1363 3 pin 13 amp and be fitted with a 5A fuse which complies with BS1362 The mains cord must be HAR or BASEC marked and be of type HO3VVF3gO 75 minimum Europe The supply plug must comply with CEE 7 7 SCHUKO The...

Страница 141: ...a modem to the console port of the Webcache 1000 3000 only use a modem which is suitable for connection to the telecommunications system WARNING RJ 45 Ports These are shielded RJ 45 data sockets They cannot be used as standard traditional telephone sockets or to connect the unit to a traditional PBX or public telephone network Only connect RJ 45 data connectors network telephony systems or network...

Страница 142: ...ité BS1362 Le cordon secteur doit porter la mention HAR ou BASEC et doit être de type HO3VVF3GO 75 minimum Europe La prise secteur doit être conforme aux normes CEE 7 7 SCHUKO La prise secteur doit être conforme aux normes CEI23 16 VII Etats Unis et Canada Le cordon doit avoir reçu l homologation des UL et un certificat de la CSA Le cordon souple doit respecter à titre minimum les spécifications s...

Страница 143: ...ension de 230 V 2 P T par le biais d un transformateur d isolement à rapport 1 1 avec un point secondaire de connexion portant l appellation Neutre et avec raccordement direct à la terre masse AVERTISSEMENT Points d accès RJ 45 Ceux ci sont protégés par des prises de données Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard ni pour la connection de l unité à un r...

Страница 144: ... passende Konfiguration für einen Geräteeingang gemäß EN60320 IEC320 haben Nur für Frankreich Diese Einheit kann nicht über Anschlüsse des Typs IT betrieben werden Wenn Sie über IT Anschlüsse verfügen muß die Einheit über einen geerdeten Trenner mit einem Übersetzungsverhältnis 1 1 mit 230 V 2P T betrieben werden dabei muß der zweite Anschlußpunkt die Vereinigtes Königreich Der Netzstecker muß die...

Страница 145: ...en weder wie normale traditionelle Telefonsteckdosen noch für die Verbindung der Einheit mit einem traditionellem privatem oder öffentlichem Telefonnetzwerk gebraucht werden Nur RJ 45 Datenanscluße Telefonnetzsysteme or Netztelefone an diese Steckdosen anschließen Entweder geschützte oder ungeschützte Buchsen dürfen an diese Datensteckdosen angeschlossen werden ...

Страница 146: ...146 APPENDIX A SAFETY INFORMATION ...

Страница 147: ...eds of up to 10 Mbps Category 5 One of five grades of Twisted Pair TP cabling defined by the EIA TIA 586 standard Category 5 can be used in Ethernet 10BASE T and Fast Ethernet networks 100BASE TX and can transmit data at speeds of up to 100 Mbps Category 5 cabling is better to use for network cabling than Category 3 because it supports both Ethernet 10 Mbps and Fast Ethernet 100 Mbps speeds 3Com r...

Страница 148: ...e connector 9 pin female PC Terminal Cable connector 25 pin male female only required if screen always required required for handshake Screen DTR TxD RxD CTS Ground DSR RTS DCD Screen DCD RxD TxD DTR Ground DSR RTS CTS Shell 4 3 2 8 5 6 7 1 Shell 1 2 3 4 5 6 7 8 Webcache 1000 3000 Cable connector 9 pin female PC AT Serial Port Cable connector 9 pin female only required if screen always required al...

Страница 149: ... configured as MDI 1 Transmit Data Bidirectional Data A 2 Transmit Data Bidirectional Data A 3 Receive Data Bidirectional Data B 4 Not assigned Bidirectional Data C 5 Not assigned Bidirectional Data C 6 Receive Data Bidirectional Data B 7 Not assigned Bidirectional Data D 8 Not assigned Bidirectional Data D Ports configured as MDIX 1 Receive Data Bidirectional Data B 2 Receive Data Bidirectional D...

Страница 150: ...150 APPENDIX B CABLE SPECIFICATIONS AND PIN OUTS ...

Страница 151: ...hedule Package testing paras 2 1 2 2 2 30 and 2 32 Operational testing paras 2 1 2 2 2 30 and 2 13 Safety Agency Certifications UL 1950 EN60950 CSA 22 2 No 950 IEC 60950 NOM 019 SCFI AS NZS 60950 EMC Emissions ICES 003 Class A FCC Part 15 Class A EN55022 Class A VCCI Class A AS NZS 3548 Class A CISPRR 22 Class A EN61000 3 2 EN61000 3 3 CNS 13438 Class A Korean EMI Class A Immunity EN 55024 Heat Di...

Страница 152: ...s Supported SNMP SNMP protocol RFC 1517 MIB II RFC 1213 Interface MIB RFC 1573 Remote Monitoring MIB RFC 1757 Terminal Emulation Telnet RFC 854 Protocols Used for Administration UDP RFC 768 IP RFC 791 ICMP RFC 792 TCP RFC 793 ARP RFC 826 TFTP RFC 783 ...

Страница 153: ...orld Wide Web Site To access the latest networking information on the 3Com Corporation World Wide Web site enter this URL into your Internet browser http www 3com com This service provides access to online support information such as technical documentation and software as well as support options that range from technical education to maintenance and professional services 3Com Knowledgebase Web Se...

Страница 154: ...planning installation hardware maintenance application training and support services When you contact your network supplier for assistance have the following information ready Product model name part number and serial number A list of system hardware and software including revision levels Diagnostic error messages Details about recent configuration changes if applicable If you are unable to contac...

Страница 155: ...1590 or 00800 0638 3266 800 6161 463 00798 611 2230 or 02 3455 6455 00798 611 2230 0080 611 261 001 800 611 2000 Europe Middle East and Africa From anywhere in these regions call 44 0 1442 435529 phone 44 0 1442 436722 fax Europe and South Africa From the following countries you may use the toll free numbers Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy 0800 297468 08...

Страница 156: ...Caribbean Chile Colombia Ecuador Mexico Paraguay Peru Uruguay Venezuela 0810 222 3266 511 241 1691 0800 133266 or 55 11 5643 2700 525 201 0004 562 240 6200 525 201 0004 525 201 0004 525 201 0004 525 201 0004 511 241 1691 525 201 0004 525 201 0004 From the following countries you may call the toll free numbers select option 2 and then option 2 Austria Belgium Denmark Finland France Germany Hungary ...

Страница 157: ...Returning Products for Repair 157 U S A and Canada 1 800 NET 3Com 1 800 638 3266 Enterprise Customers 1 800 876 3266 1 408 326 7120 not toll free Country Telephone Number Fax Number ...

Страница 158: ...158 APPENDIX D TECHNICAL SUPPORT ...

Страница 159: ...that a channel can transmit The bandwidth of Ethernet is 10 Mbps and the bandwidth of Fast Ethernet is 100 Mbps baud The signalling rate of a line that is the number of transitions voltage or frequency changes made per second Also known as line speed cache Stores copies of frequently accessed objects close to users and serves them to users when requested cache hit An object in the cache that can b...

Страница 160: ...d and received but not at the same time Contrast with full duplex HTTP Hypertext Transfer Protocol This is a set of rules for exchanging files text graphic images sound video and other multimedia files on the World Wide Web IETF Internet Engineering Task Force An organization responsible for providing engineering solutions for TCP IP networks In the network management area this group is responsibl...

Страница 161: ...e Webcache that enables you to monitor the Webcache s performance NTP Network Time Protocol This protocol is used to synchronize the time of client machines and servers with other well known highly accurate servers or reference time sources such as a radio satellite receiver or modem It maintains a consistent Coordinated Universal Time UTC within your network which is far more accurate than the in...

Страница 162: ...er parts The first part identifies the subnet number The second part identifies the device on that subnet TCP IP Transmission Control Protocol Internet Protocol This is the name for two of the most well known protocols developed for the interconnection of networks Originally a UNIX standard TCP IP is now supported on almost all platforms and is the protocol of the Internet TCP relates to the conte...

Страница 163: ...ordinated Universal Time This is the standard time common to every place in the world Formerly and still widely called Greenwich Mean Time GMT and also World Time UTC nominally reflects the mean solar time along the Earth s prime meridian WAN port On the Webcache the WAN port is an auto negotiating 10BASE T 100BASE TX RJ 45 port which is used to connect the Webcache to the network in an inline dep...

Страница 164: ...164 GLOSSARY ...

Страница 165: ...nd miss latencies 89 hit and miss rate 88 request rate 88 throughput 89 CD ROM 26 Command Line Interface 109 accessing 109 basicConfig command 118 community command 124 contact command 123 displaying menus 113 dnsConfig command 118 entering commands 113 exiting 111 getting started command 115 help 114 initialize command 122 initializeConfig command 119 IP 117 location command 124 logging in 111 lo...

Страница 166: ...configuring 83 SNMP Traps 85 configuring 86 F factory defaults 22 forgetting your password 72 front panel 19 front panel LEDs 19 activity 20 cache storage status 19 link status 19 power self test 20 G getting started command 115 H Help View 63 hotspots console port 62 LAN port 62 unit 62 I I O performance graph 89 disk activity 90 DNS hit rate 90 DNS lookups 90 network packets 90 new TCP connectio...

Страница 167: ...resses 45 hops 92 Network Supervisor 18 network supplier support 154 Network Time Protocol 67 68 choosing a server 68 configuring 69 public servers 68 network deploying the Webcache 49 57 NTP 67 null modem cable 41 pin outs 148 O obtaining registered IP address 45 online technical services 153 P package contents 26 password command 121 password recovery 72 disabling 72 enabling 72 performing 73 pa...

Страница 168: ... the Command Line Interface 40 using the Web interface 38 Simple Network Management Protocol 85 siting the Webcache 26 SNMP community string 124 SNMP Traps 85 86 software upgrades 98 software 97 installation 97 upgrade 97 Software Installation 102 performing 102 unsuccessful 102 Software Upgrades 97 configuring 98 performing 99 SNMP Traps 98 unsuccessful 98 solving problems 129 specifications tech...

Страница 169: ... Proxy Auto Discovery WPAD 53 Web Client Blocking 77 configuring 78 Web interface accessing 39 58 banner 60 information area 65 navigation tree 64 solving problems 130 toolbar 61 Web Proxy Auto Discovery WPAD 53 resources 54 Web Site Blocking 75 configuring 76 customizing the response 76 Webcache connecting to the live network 44 default settings 22 front view detail 19 installing 25 introduction ...

Страница 170: ...170 INDEX ...

Страница 171: ...ONS You agree that you will not export or re export the Software or accompanying documentation or any copies thereof or any products utilizing the Software or such documentation in violation of any applicable laws or regulations of the United States and the country in which you obtained them TRADE SECRETS TITLE You acknowledge and agree that the structure sequence and organization of the Software ...

Страница 172: ...ribute copies of the software or if you modify it For example if you distribute copies of such a program whether gratis or for a fee you must give the recipients all the rights that you have You must make sure that they too receive or can get the source code And you must show them these terms so they know their rights We protect your rights with two steps 1 copyright the software and 2 offer you t...

Страница 173: ...he scope of this License 3 You may copy and distribute the Program or a work based on it under Section 2 in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following a Accompany it with the complete corresponding machine readable source code which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used...

Страница 174: ...new versions of the General Public License from time to time Such new versions will be similar in spirit to the present version but may differ in detail to address new problems or concerns Each version is given a distinguishing version number If the Program specifies a version number of this License which applies to it and any later version you have the option of following the terms and conditions...

Страница 175: ... C 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY for details type show w This is free software and you are welcome to redistribute it under certain conditions type show c for details The hypothetical commands show w and show c should show the appropriate parts of the General Public License Of course the commands you use may be called something other than show w and show c they ...

Страница 176: ...e the equipment away from the receiver Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio T...

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