Version 3
September 1, 2003
The products described in this User's Guide are licensed products of NetPurifier, Inc. This User's Guide contains proprietary information protected by copyright, and this User's Guide and all accompanying software and documentation are copyrighted.
NetPurifier, Inc. , hereafter referred to as NetPurifier, does not warrant that the product will work properly in all environments and applications, and makes no warranty and representation, either implied or expressed, with respect to the quality, performance, merchantability, or fitness for a particular purpose.
NetPurifier has made every effort to ensure that this manual is accurate. However, information in this User's Guide is subject to change without notice and does not represent a commitment on the part of NetPurifier. NetPurifier makes no commitment to update or keep current the information in this User's Guide, and reserves the right to make changes to this User's Guide and/or product without notice. NetPurifier assumes no responsibility for any inaccuracies and omissions that may be contained in this User's Guide. If you find information in this User's Guide that is incorrect, misleading, or incomplete, we would appreciate your comments.
No part of this User's Guide may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or information storage and retrieval systems, for any purpose other than the purchaser's personal use, without the express written permission of NetPurifier.
The NetPurifier logo is a trademark of NetPurifier, Inc
All other trademarks or registered trademarks listed belong to their respective owners.
Copyright 2003 NetPurifier, Inc.
All rights reserved.
Table of Contents........................................................................ |
i |
Introduction and Getting Started ........................................... |
1-1 |
Features ............................................................................................. |
1-1 |
How NetPurifier Works....................................................................... |
1-2 |
Overview ........................................................................................ |
1-2 |
Filtering System ............................................................................. |
1-2 |
Sensitivity Levels............................................................................ |
1-3 |
Using This User’s Guide .................................................................... |
1-4 |
Navigating Through This Online User’s Guide .............................. |
1-4 |
Conventions in This User’s Guide.................................................. |
1-5 |
Getting Started................................................................................... |
1-6 |
Installing NetPurifier............................................................... |
2-1 |
Installation .......................................................................................... |
2-1 |
Location.......................................................................................... |
2-1 |
AC Power ....................................................................................... |
2-1 |
Network Connection....................................................................... |
2-1 |
Power On and Indicator Lights....................................................... |
2-2 |
Connecting a browser to NetPurifier.................................................. |
2-2 |
Windows 2000/XP.......................................................................... |
2-3 |
MAC OS10 ..................................................................................... |
2-3 |
Making a connection .......................................................................... |
2-4 |
Configuring NetPurifier .......................................................... |
3-1 |
Security Configuration........................................................................ |
3-1 |
Changing the default password ..................................................... |
3-2 |
DNS/Gateway Configuration.............................................................. |
3-4 |
Network Interfaces (IP Address Configuration) ............................. |
3-5 |
Routing and Gateways................................................................... |
3-7 |
|
|
DNS................................................................................................ |
3-8 |
Completing the DNS/Gateway Configuration................................. |
3-8 |
DHCP Configuration........................................................................... |
3-9 |
Using an existing DHCP Server ..................................................... |
3-9 |
Using the NetPurifier DHCP Server ............................................... |
3-9 |
Port Blocker...................................................................................... |
3-12 |
Changing Port Blocker Configuration........................................... |
3-13 |
Enabling Common Ports .............................................................. |
3-13 |
Adding User Defined Ports........................................................... |
3-14 |
Enabling All Ports ......................................................................... |
3-14 |
Router Compatibility Mode........................................................... |
3-14 |
Changing levels, lists and messages............................................... |
3-15 |
Changing Levels........................................................................... |
3-15 |
Filter Matrix................................................................................... |
3-16 |
Adding to the Exception Site list................................................... |
3-20 |
Adding to the Exception IP list ..................................................... |
3-21 |
Changing the Access Denied page message .............................. |
3-22 |
Add to Banned Site List................................................................ |
3-23 |
NetPurifier Operation .............................................................. |
4-1 |
Network Flow...................................................................................... |
4-2 |
How NetPurifier filters ........................................................................ |
4-2 |
Blacklist .......................................................................................... |
4-3 |
Smart Filter Technology ................................................................. |
4-4 |
Troubleshooting ..................................................................... |
A-1 |
Contact Information ............................................................... |
B-1 |
Location............................................................................................. |
B-1 |
Website ............................................................................................. |
B-1 |
Sales ................................................................................................. |
B-1 |
Technical Support ............................................................................. |
B-2 |
Specifications ......................................................................... |
C-1 |
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NetPurifier™ stops the pornography, the on-line gambling, the hate sites at the Internet gateway, before the offensive material reaches children. You don’t have to worry about kids surfing the Net. With NetPurifier, if they accidentally misspell a word or use a search word that takes them to the “dark side,” they will see a friendly message telling them the site has inappropriate content.
Features
NetPurifier offers the following features:
Stops access to pornography, hate and gambling sites.
Blocks downloading of harmful and illegal files including mp3 music files.
Filters networks as large as 230 computers.
Three types of filtering with Smart Filter Technology.
Four sensitivity levels configured for different age groups.
500,000+ site Blacklist updated daily or weekly.
Built in DHCP server.
Built in Caching Proxy.
Does not require reconfiguration of client computers.
Easy to install, no required maintenance.
Unlimited licensing is standard.
How NetPurifier Works
Overview
NetPurifier is a hardware-and-software, set-it-and-forget-it device that plugs into your network and redirects all Internet traffic to itself. Only the NetPurifier communicates directly with the Internet. Internet information for all other computers (e.g., Windows, Apple, Linux) must first go through the filter system built into the NetPurifier.
Filtering System
A three-tier filter system ensures that inappropriate content does not reach the user.
First, NetPurifier compares the site with its blacklist to determine if the address has already been deemed inappropriate.
The product then looks at the site rating, searching for the industry-standard rating tags.
Finally, NetPurifier scans every word on the Internet page looking for words that indicate inappropriate content. The context of these words is then analyzed to determine if the page should be blocked. This greatly reduces the number of false positives while blocking those pages that are offensive. This feature accounts for NetPurifier’s remarkable accuracy.
If the content passes through all three filters, NetPurifier allows the page to be loaded on the user’s computer. If any of the filters fail, an “Access Denied” page is sent to the user’s computer. All this is done in a fraction of a second, with no delay seen by the user.
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Sensitivity Levels
Level 1
This level is suggested only for the youngest children or where the strictest policy is enforced.
Incorporates very strict filtering and minimal downloading capabilities.
Porn, hate, hacking and gambling are not allowed.
Web based email is not allowed at common sites such as Hotmail and Yahoo.
Downloading of files including exe, mp3, dll, avi, visual basic extensions and many more are not allowed.
Many automatic program updates will not work with this setting.
Level 2
This level is suggested for Elementary Schools
Porn, hate, hacking and gambling are not allowed.
Web based email is not allowed at common sites such as Hotmail and Yahoo.
Downloading of files, excluding mp3 and exe, is allowed.
Level 3
This level is suggested for Middle or Junior High Schools
Porn, hate, hacking and gambling are not allowed.
Web based email allowed.
Downloading of files, excluding mp3, is allowed.
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Level 4
This level is suggested for public access points such as kiosks and library terminals, High School and colleges and filtered adult use.
Porn is not allowed.
Web based email allowed.
Downloading of all files is allowed.
Using This User’s Guide
This User's Guide is designed to install, configure, use, and troubleshoot the NetPurifier network content filtering device. The following list summarizes the chapters and appendixes that follow this chapter.
Chapter 2, “Installing NetPurifier” — describes how to install and physically connect NetPurifier to your network.
Chapter 3, “Configuring NetPurifier” — describes how to configure NetPurifier. This includes setting up DHCP, DNS, Gateway and changing Sensitivity Levels
Chapter 4, “NetPurifier Operation” — describes the operation of NetPurifier.
Appendix A, “Troubleshooting” — provides information for troubleshooting NetPurifier.
Appendix B, "Contact Information” —provides contact information including telephone numbers, address, email and hours of operation.
Appendix C, “Specifications” — provides technical information about NetPurifier.
For your convenience, an Index appears at the end of this User’s Guide.
Navigating Through This Online User’s Guide
This User’s Guide contains all the information you need to install, use, and troubleshoot NetPurifier. To assist you in navigating
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through this document, we have added blue-colored hot links to the Table of Contents, index, chapters, and appendixes in this User’s Guide. Clicking one of these hot links automatically moves you to that location in this User’s Guide. For example, if you click one of the blue-colored chapter or appendix titles in the previous section, you automatically move to the first page in that chapter or appendix.
Conventions in This User’s Guide
This User’s Guide uses the following conventions:
“Notes” are information requiring extra attention.
“Tips” are helpful procedures or shortcuts for simplifying a task.
“Important” is information that, if not followed, may affect the proper operation of the product.
“Warning” is information, that if not followed or understood, may affect the operation of the product, the operating system or the system configuration.
“Bold” is used to denote an item that is to be clicked or selected.
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Getting Started
NetPurifier suggests that the following order of installation and configuration is followed.
1.Have the following information available when installing and configuring NetPurifier.
Network IP range |
_________________________ |
(i.e. 192.168.1.0-254) |
|
Network subnet mask |
_________________________ |
(i.e. 255.255.255.0) |
|
Primary DNS |
_________________________ |
Secondary DNS |
_________________________ |
Network Gateway |
_________________________ |
If you will be using Net Purifiers built-in DHCP server the following additional information may be needed.
Static IP device 1 _________________________
Static IP device 2 _________________________
Static IP device 3 _________________________
2.Install NetPurifier as described in Chapter 2, Installing NetPurifier.
3.Configure NetPurifier as described in Chapter 3, Configuring NetPurifier.
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In this chapter we will discuss the physical installation of NetPurifier and how to connect a browser to NetPurifier in preparation for configuration.
Installation
Location
NetPurifier should be installed in a clean, dry location located within near available hub/switch port of the network that is to be filtered.
AC Power
Connect the supplied AC Power cord to the NetPurifier and a properly grounded 115VAC outlet.
Network Connection
Connect either the supplied network cable (6ft) or your own network cable between the NetPurifier’s network connector and a port on your hub or switch. NetPurifier works on 10baseT and 100baseT networks.
Note: NetPurifier may be connected to any point in the network as long as it is on the same subnet as the network it will filter.
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Power On and Indicator Lights
After all connections are made NetPurifier may be powered on by pressing the power switch on the front of the unit. The green indicator light indicates that NetPurifier is powered on and functioning normally. The yellow light indicates disk activity.
Note: After power on, NetPurifier will take approximately two minutes before it is ready for operation.
To power off NetPurifier press the power button. All indicator lights will extinguish.
Connecting a browser to NetPurifier
Configuration of NetPurifier is done by way of TCP/IP using a Browser. The following browsers have been tested with NetPurifier.
Internet Explorer 4 or newer
Netscape 4 or newer
Opera
NetPurifier is configured from the factory for the 192.168.1.0/255.255.255.0 subnet. If your network is already using this subnet then you are ready to configure NetPurifier.
If your network is not using this subnet then you will need to configure the computer that will configure NetPurifier to temporarily reflect a static IP on the 192.168.1.x network. This is done as follows:
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Windows 2000/XP
1.Right click My Network Places
2.Click Properties of the Local Area Network you are using.
3.Double click Internet Protocol.
4.Set the IP address, Subnet mask and Default gateway as shown in Fig 2-1.
Figure 2-1: Setting Windows2000/XP IP Address
MAC OS10
Note: After configuring NetPurifier to your network subnet you may then set your computer back to its original network settings.
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Making a connection
NetPurifier is accessed by pointing your browser to 192.168.1.9:10000. Upon a successful connection you will see:
Figure 2-2: Webmin Login
You are now ready to configure NetPurifier as described in the next chapter.
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Security Configuration
Upon connection to NetPurifier you will be presented with a login screen to Webmin. Webmin is the web based interface used to configure NetPurifier.
Figure 3-1: Webmin Login
The default Username is: netpurifier
The default Password is: netpurifier
Note: It is recommended that you immediately change the default password to a password of your own choosing. This is described below.
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