3Com SuperStack 3C16115 User manual
http://www.3com.com/
Part No. DUA1611-5AAA02
Published May 2001
SuperStack®3
Webcache 1000 (3C16115)
Webcache 3000 (3C16116)
User Guide
3Com Corporation
5400 Bayfront Plaza
Santa Clara, California
95052-8145
Copyright © 2001, 3Com Technologies. All rights reserved. No part of this documentation may be reproduced
in any form or by any means or used to make any derivative work (such as translation, transformation, or
adaptation) without written permission from 3Com Technologies.
3Com Technologies reserves the right to revise this documentation and to make changes in content from time
to time without obligation on the part of 3Com Technologies to provide notification of such revision or
change.
3Com Technologies provides this documentation without warranty, term, or condition of any kind, either
implied or expressed, including, but not limited to, the implied warranties, terms or conditions of
merchantability, satisfactory quality, and fitness for a particular purpose. 3Com may make improvements or
changes in the product(s) and/or the program(s) described in this documentation at any time.
If there is any software on removable media described in this documentation, it is furnished under a license
agreement included with the product as a separate document, in the hard copy documentation, or on the
removable media in a directory file named LICENSE.TXT or !LICENSE.TXT. If you are unable to locate a copy,
please contact 3Com and a copy will be provided to you.
UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herein are
provided to you subject to the following:
All technical data and computer software are commercial in nature and developed solely at private expense.
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995) or
as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited rights
only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is applicable.
You agree not to remove or deface any portion 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 Corporation.
Intel and Pentium are registered trademarks of Intel Corporation. Microsoft, MS-DOS, Windows, and Windows
NT are registered trademarks of Microsoft Corporation. Novell and NetWare are registered trademarks of
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associated.
ENVIRONMENTAL STATEMENT
It is the policy of 3Com Corporation to be environmentally-friendly in all operations. To uphold our policy, we
are committed to:
Establishing environmental performance standards that comply with national legislation and regulations.
Conserving energy, materials and natural resources in all operations.
Reducing the waste generated by all operations. Ensuring that all waste conforms to recognized environmental
standards. Maximizing the recyclable and reusable content of all products.
Ensuring that all products can be recycled, reused and disposed of safely.
Ensuring that all products are labelled according to recognized environmental standards.
Improving our environmental record on a continual basis.
End of Life Statement
3Com processes allow for the recovery, reclamation and safe disposal of all end-of-life electronic components.
Regulated Materials Statement
3Com products do not contain any hazardous or ozone-depleting material.
Environmental Statement about the Documentation
The documentation for this product is printed on paper that comes from sustainable, managed forests; it is
fully biodegradable and recyclable, and is completely chlorine-free. The varnish is environmentally-friendly, and
the inks are vegetable-based with a low heavy-metal content.
CONTENTS
ABOUT THIS GUIDE
Conventions 12
Related Documentation 13
Documentation Comments 13
Product Registration 14
IGETTING STARTED
1INTRODUCING THE WEBCACHE
What is the Webcache? 17
The Webcache and 3Com Network Supervisor 18
Webcache —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
2INSTALLING 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
Deploying the Webcache in Your Network 33
Proxy Cache 33
Transparent Cache 34
Migrating from Proxy Cache to Transparent Cache Mode 35
Deploying the SuperStack 3 Firewall as a Proxy Forwarder 35
Setting Up the Webcache for Management 36
Before You Begin 37
Setting Up Using the Web Interface 38
Setting Up Using the Command Line Interface 40
Getting Started Wizard Settings 43
Connecting the Webcache to the Live Network 44
Choosing the Correct 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
3CONFIGURING 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
4MANAGING THE WEBCACHE
Management Software Interfaces 57
Logging in as a Default User 58
Accessing the Web Interface 58
Understanding the Web Interface 60
The Banner 60
The Toolbar 61
The Summary View 61
The Device View 61
The Help View 63
The Navigation Tree 64
The Information Area 65
5SYSTEM TIME
Configuring the System Time 67
What is the Network Time Protocol? 68
Choosing a Network Time Protocol Server 68
Configuring the System Time Using the Network Time Protocol 69
Configuring the System Time Manually 69
System Time and Performance Graphs 69
6SECURITY
What are Passwords? 71
Setting Passwords 71
What is Password Recovery? 72
Enabling/Disabling Password Recovery 72
Performing Password Recovery 73
7CONTROLLING 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 80
Viewing the Access Log 81
Analyzing the Access Logs 81
8SYSTEM EVENTS
What are System Events? 83
Email Notification 83
Configuring Email Notification 83
SNMP Traps 85
Configuring SNMP Traps 86
9PERFORMANCE MONITORING
What is Performance Monitoring? 87
Caching Performance Graphs 87
System Performance Graphs 89
I/O Performance Graphs 89
10 SYSTEM DIAGNOSTICS
What are System Diagnostics? 91
Pinging Other Devices 91
Performing a Ping 91
Tracing IP Addresses 92
Performing a Trace Route 92
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
Performing a Software Installation 102
Saving and Restoring Configurations 103
Saving a Configuration 105
Restoring a Configuration 105
III COMMAND LINE INTERFACE
12 COMMAND LINE INTERFACE
Accessing the Command Line Interface 109
Accessing the Command Line Interface Through the Console Port 110
Accessing the Command Line Interface Over the Network 111
Logging In To the Command Line Interface 111
Exiting the Interface 111
Understanding the Command Line Interface 112
Entering Commands 113
Displaying Menus 113
Obtaining Help 114
A Quick Guide to the Commands 114
Getting Started 115
Exiting the Command Line Interface 117
Displaying 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 122
Displaying and Changing Webcache Information and Functions 122
Initializing the Webcache 122
Rebooting the Webcache 123
Specifying a Contact Name 123
Specifying Location Details 124
Specifying a Webcache Name 124
Setting the Webcache SNMP Community String 124
Displaying Summary Information 125
IV PROBLEM SOLVING
13 PROBLEM SOLVING
Accessing the Webcache via the Console Line 129
Accessing the Webcache via Telnet 130
Solving Web Interface Problems 130
Solving Command Line Interface Problems 133
Solving Webcache Performance Problems 134
VAPPENDICES AND INDEX
ASAFETY INFORMATION
Important Safety Information 140
Consignes importantes de sécurité142
Wichtige Sicherheitsinformationen 144
BCABLE 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
CTECHNICAL SPECIFICATIONS
DTECHNICAL SUPPORT
Online Technical Services 153
World Wide Web Site 153
3Com Knowledgebase Web Services 153
3Com FTP Site 154
Support from Your Network Supplier 154
Support from 3Com 154
Returning Products for Repair 156
GLOSSARY
INDEX
3COM END USER SOFTWARE LICENSE AGREEMENT
GNU GENERAL PUBLIC LICENSE VERSION 2, JUNE 1991
REGULATORY NOTICES
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