3Com Webcache 1000 (3C16115), Webcache 3000 (3C16116) guide

34CHAPTER 2: INSTALLING THE WEBCACHE

In the Proxy Cache deployment the Webcache is connected to an Ethernet switch in your LAN. You must configure the Web browser on each client machine in your network to explicitly direct its Web requests to the Webcache. For more information on Web browser configuration, see “Configuring Web Browsers” on page 49.

All Web requests are received and served by the Webcache. All non-Web traffic bypasses the Webcache and is sent directly to the appropriate destination.

If the Webcache fails, access to the Web is lost because each client machine has been configured to direct 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 the Webcache is connected to a Layer 4 switch, router or firewall in your LAN which is capable of Redirection. The Layer 4 device (also known as a Layer 4 redirector or Web-enabled device) automatically redirects all Web requests to the Webcache. Therefore no configuration of the Web browser on each client machine is needed, which avoids configuration problems and reduces the demand on technical support.

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3Com Webcache 1000 (3C16115), Webcache 3000 (3C16116) manual Transparent Cache Transparent Cache Deployment

Contents

SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents II Webcache Features System Time Performance Monitoring III Command Line Interface Problem Solving Returning Products for Repair Page About this Guide Icon Description ConventionsConvention Description Comments RelatedDocumentation Pddtechpubscomments@3com.com Registration ProductSite Getting Started Page Reduced Network Traffic What isWebcache? Reduced Web Latency 3Com Network Controlled Web AccessWebcache Supervisor Color Indicates Cache Storage Status LEDs View DetailLink Status LEDs Power/Self test LED LED Color Indicates Activity LED LEDs DNS Server Default Router Feature Webcache 1000/3000 Port SpeedDuplex Mode Caching Mode Network Time Protocol Disabled NTP Introducing the Webcache Installing the Webcache Choosing a Suitable Package ContentsSite Rack-Mounting Kit Contents Webcachemounts Fitting a Rack-Mounting Bracket to the Webcache Fitting a Rack-Mounting Rail to the Rear of the Rack Repeat and for the other side of the rack Fitting a Rack-Mounting Rail to the Front of the Rack Sequence Power-upPowering-up Webcache Problem Color State Deploying Webcache in Your Network Proxy Cache Transparent Cache Transparent Cache Deployment As a Proxy Forwarder below Key Setting Up the Webcache for Management Example Setting Up Over the Test Network Setting Up Using a Cross-over Cable Accessing the Web Interface Is the default IP address of the Webcache User name and password screen Setting Up Through the Console Port To connect to the Webcache via the console port Accessing the Command Line Interface Getting Started Wizard SettingsSetting Meaning Default Example Completing the Getting Started wizard before you introduce Live Network ConnectingWebcache to Cables IP Addresses ConfigurationConcepts Obtaining a Registered IP Address Installing the Webcache Host Name You cannot enter a host name containing a space character Domain Name Manual Click LAN Settings Tick Use a proxy serverExplicitly direct its Web requests to the Webcache Proxy Auto Select Manual Proxy ConfigurationFile Scripts Http//intranet Click LAN Settings Tick Use automatic configuration script Select Automatic Proxy Configuration Auto-Discovery Without delays caused by WpadWeb Proxy Web Proxy Auto-Discovery Wpad protocol is not supported by Resources Web ProxyAuto-Discovery Third-party Tools Chapter Managing the Webcache System Time Security System DiagnosticsSoftware Upgrade and Installation Chapter System Events Performance MonitoringPage Management Software Interfaces Logging in as a Default UserAdmin user name is case-sensitive Interface Accessing the Web Interface Understanding the The Web Interface Banner Device View ToolbarSummary View Help View LAN Port Hotspot Device MimicConsole Port Hotspot Unit Hotspot Device Summary SymbolBehavior Information Area Managing the Webcache System Time Choosing a Network TimeProtocol? Protocol Server System Time ConfiguringProtocol Manually System Time What are Passwords?Setting Passwords Username as soon as possible Enabled on the Webcache Account no passwordAccess to the management interfaces Security of the Webcache. When password recovery is enabled Password for the admin username Password RecoveryPerforming Security WEB Access Site Blocking Check Enable Web Site BlockingExample Domain Name Rules What is Web Client Blocking? Client Blocking Log in to the Web interface Click Device View on the Toolbar Access logs contain the following fields See Proxy Auto Configuration PAC File Scripts onAccess log to the FTP server Bypass the Webcache entirely after reading the Browser Logging Field Description Log Access LogsAnalyzing Controlling and Monitoring WEB Access System Events Notification Software upgrade has succeeded Software upgrade has failed Check Enable Email Notifcation of System EventsNew software upgrade is available Webcache has failed its Power On Self Test Cache storage device has failed Click OK It. You can configure the network management station to logSnmp Traps System events occur. An Snmp trap is a message generated by Traps Monitoring? Caching Hit and Miss Rate % Bandwidth Saving %Request Rate sec-1 Throughput Kbits/sec SystemHit and Miss Latencies msec CPU Load % New TCP Connection sec Disk Activity secNetwork Packets sec DNS Lookups sec Pinging Other Diagnostics?What are System Devices Performing a Trace Tracing IPAddresses Route That worked are displayed Administrator and 3Com support personnel to troubleshootSystem Log System Log is primarily intended to be used by your System Special.asp Log System Diagnostics Installation Upgrades For more information about Snmp Traps, see Snmp Traps on Performing a Software Upgrade Performing an Automatically Detected Software Upgrade Upgrade Later View Upgrade Version Release NotesUpgrade Now Discard Upgrade Performing a Manual Software Upgrade Installation What is a SoftwareInstallation? Performing a Saving ConfigurationsConfigure the settings of the replacement Webcache Restoring Example Interface Matching configuration file to restore the settingsRestoring a Web interface Click Restore. The restore process begins Command Line Interface III 108 Accessing Command Line Interface Accessing Command Line Console port Command Line Interface Protocol menu GettingStarted commandLogout command Security menu To enter commands that require values To enter a simple commandTo enter multiple commands To enter abbreviated commands Commands Quick Guide to Enter a valid IP address Following prompt is displayed Basic setup information for the WebcacheFollowing prompt is displayed Enter a valid subnet mask Following prompt is displayed Enter a valid date Following prompt is displayed Enter the new password for the admin userEnter a valid domain name Following prompt is displayed Enter a valid time Displaying Changing IP-related Information Command on the Top-level menuExiting Automatically log you out Enter a valid gateway IP address Specify an IP address to be tracedEnter a valid domain name Enter yes to reset the IP address for the Webcache Resetting IP Information to Factory Default SettingsEnter a valid Domain Name System DNS Server IP address Information To display the IP information, at the Top-level menu, enter No password Changing the AdminPassword Displaying Displaying Changing Webcache Information Functions Following example prompt is displayed What Happens During a Reboot? What Happens During an Initialization? Management menu Specifying aTo specify the name At the Top-level menu, enter Following read-only fields are displayed Enter a community string for the admin user nameTo set the community string At the Top-level menu, enter System Name Software Version Time Since ResetContact Hardware Version Problem Solving 128 Accessing the Webcache via the Console Line You cannot access the Webcache using Telnet Accessing the Webcache via TelnetInterface Problems Solving Web You cannot access the Web interface System Time does not update in the Web interface Problems Solving CommandLine Interface No Web sites can be accessed using the Webcache PerformanceCheck ProblemsSolving Webcache The performance of the Webcache is poor Solving Webcache Performance Problems Problem Solving Appendices and Index 138 Safety Information This must be approved for the country where it is used Important SafetyPower Cord Set Personnel only Only France and Peru only Il doit être agréé dans le pays dutilisation Consignes importantes de sécuritéCordon électrique Calibre 18 AWG Type SV ou 5J Conducteurs Consignes importantes de sécurité Das Gerät muß geerdet sein Wichtige Sicherheitsinformat ionenNetzstecker Bezeichnung Neutral tragen †Impédance à la terre Appendix a Safety Information PIN -OUTS Category Pin to RS-232 25-pin Pin-outsNull-Modem Cable PC-AT Serial Cable Pin Number Signal Function Modem Cable 9-pin to RS-232 25-pin Appendix B Cable Specifications and PIN-OUTS Power Supply Physical DimensionsSafety Environmental Requirements Standards Supported Protocols Used for AdministrationTerminal Emulation Services Online Technical Hostname ftp.3com.com Asia, Pacific Rim Europe and South Africa Country Telephone Number Fax Number Returning Products for Repair Appendix D Technical Support Glossary Full duplex EthernetFast Ethernet Gateway Line speed LAN portLatency Protocol Glossary Glossary Glossary Index Index LAN Snmp Index Index 3COM END User Software License Agreement GNU General Public License Version 2, June Page No Warranty Page Regulatory Notices