Netopia 4541 Product information sheet

Netopia
™
4541 and 4542
ADSL Routers
User’s Reference Guide

Copyright
©2001 Netopia, Inc., v.080102
All rights reserved. Printed in the U.S.A.
This manual and any associated artwork, software, and product designs are copyrighted with
all rights reserved. Under the copyright laws such materials may not be copied, in whole or
part, without the prior written consent of Netopia, Inc. Under the law, copying includes
translation to another language or format.
Netopia, Inc.
2470 Mariner Square Loop
Alameda, CA 94501-1010
U.S.A.
Part Number
For additional copies of this electronic manual, order Netopia part number 6161090-PF-02.
Printed Copies
For printed copies of this manual, order Netopia part number TER/Doc
(P/N 6161090-00-02).

Contents 1
G
Chapter 1 — Introduction..........................................................1-1
Overview....................................................................... 1-1
Features and capabilities ............................................... 1-1
How to use this guide .................................................... 1-2
Chapter 2 — Making the Physical Connections..........................2-1
Find a location............................................................... 2-1
What you need .............................................................. 2-1
Identify the connectors and attach the cables.................. 2-2
Netopia 4541/4542 ADSL Router status lights................ 2-3
Chapter 3 — Sharing the Connection.........................................3-1
Configuring TCP/IP on Windows-based Computers............ 3-1
Dynamic configuration (recommended)................... 3-2
Static configuration (optional)................................ 3-3
Configuring TCP/IP on Macintosh Computers ................... 3-5
Dynamic configuration (recommended)................... 3-5
Static configuration (optional)................................ 3-6
Chapter 4 — Connecting to Your Local Area Network.................4-1
Readying computers on your local network....................... 4-1
Connecting to an Ethernet network.................................. 4-2
Chapter 5 — Console-Based Management.................................5-1
Connecting through a Telnet session............................... 5-2
Configuring Telnet software................................... 5-3
Connecting a console cable to your router ....................... 5-3
Navigating through the console screens .......................... 5-4
Chapter 6 — Easy Setup...........................................................6-1
Easy Setup console screens........................................... 6-1
Accessing the Easy Setup console screens............ 6-1
Quick Easy Setup connection path .................................. 6-2
DSL Line Configuration ......................................... 6-3
Easy Setup Profile................................................ 6-4
CC
CCoo oonn nntt ttee eenn nntt ttss ss

2 User’s Reference Guide
IP Easy Setup ...................................................... 6-5
Easy Setup Security Configuration ......................... 6-7
Chapter 7 — WAN and System Configuration.............................7-1
WAN configuration.......................................................... 7-1
Creating a new Connection Profile................................... 7-4
The default profile.......................................................... 7-7
IP parameters (default profile) screen.................... 7-8
Scheduled connections.................................................. 7-8
Viewing scheduled connections............................. 7-9
Adding a scheduled connection........................... 7-10
Set Weekly Schedule.......................................... 7-11
Set Once-Only Schedule...................................... 7-12
Modifying a scheduled connection....................... 7-13
Deleting a scheduled connection......................... 7-13
System configuration screens ...................................... 7-13
Navigating through the system configuration screens...... 7-14
System configuration features............................. 7-15
IP setup............................................................. 7-16
Filter sets (firewalls)........................................... 7-16
IP address serving ............................................. 7-16
Date and time.................................................... 7-16
Console configuration......................................... 7-17
SNMP (Simple Network Management Protocol)..... 7-17
Security............................................................. 7-18
Upgrade feature set ........................................... 7-18
Logging ............................................................. 7-18
Installing the Syslog client .................................. 7-19
Chapter 8 — IP Setup...............................................................8-1
IP Setup........................................................................ 8-2
IP subnets........................................................... 8-4
Static routes........................................................ 8-6
IP Address Serving ...................................................... 8-10

Contents 3
G
IP Address Pools................................................ 8-13
DHCP NetBIOS Options....................................... 8-15
More Address Serving Options...................................... 8-17
Configuring the IP Address Server options............ 8-18
DHCP Relay Agent........................................................ 8-23
Connection Profiles...................................................... 8-25
Chapter 9 — Multiple Network Address Translation ...................9-1
Overview....................................................................... 9-1
Features.............................................................. 9-1
Supported traffic.................................................. 9-5
MultiNAT Configuration................................................... 9-5
Easy Setup Profile configuration ............................ 9-6
Server Lists and Dynamic NAT configuration........... 9-6
IP setup............................................................... 9-7
Modifying map lists............................................ 9-12
Adding Server Lists...................................................... 9-14
Modifying server lists ......................................... 9-17
Deleting a server ............................................... 9-19
Binding Map Lists and Server Lists............................... 9-20
IP profile parameters.......................................... 9-20
IP Parameters (WAN Default Profile)..................... 9-22
NAT Associations......................................................... 9-24
MultiNAT Configuration Example.................................... 9-26
Chapter 10 — Virtual Private Networks (VPNs)........................10-1
Overview..................................................................... 10-1
About PPTP Tunnels ..................................................... 10-3
PPTP configuration.............................................. 10-4
About IPsec Tunnels..................................................... 10-7
Configuration ..................................................... 10-7
IP Profile Parameters........................................ 10-10
Advanced IP Profile Options............................... 10-11
Interoperation with other features...................... 10-12

4 User’s Reference Guide
About ATMP Tunnels................................................... 10-12
ATMP configuration........................................... 10-12
Encryption Support.................................................... 10-15
MS-CHAP V2 and 128-bit strong encryption........ 10-15
ATMP/PPTP Default Profile.......................................... 10-16
VPN QuickView .......................................................... 10-17
Dial-Up Networking for VPN......................................... 10-18
Installing Dial-Up Networking............................. 10-18
Creating a new Dial-Up Networking profile .......... 10-19
Configuring a Dial-Up Networking profile ............. 10-20
Installing the VPN Client............................................. 10-21
Windows 95 VPN installation............................. 10-21
Windows 98 VPN installation............................. 10-22
Connecting using Dial-Up Networking................. 10-23
Allowing VPNs through a Firewall................................. 10-23
PPTP example.................................................. 10-24
ATMP example ................................................. 10-26
Chapter 11 — Security ...........................................................11-1
Suggested security measures....................................... 11-1
User accounts............................................................. 11-1
Telnet access.............................................................. 11-3
About filters and filter sets ........................................... 11-4
What’s a filter and what’s a filter set?.................. 11-4
How filter sets work............................................ 11-4
How individual filters work................................... 11-6
Design guidelines............................................. 11-11
Working with IP filters and filter sets............................ 11-12
Adding a filter set............................................. 11-12
Deleting a filter set........................................... 11-17
A sample filter set............................................ 11-17
Firewall tutorial.......................................................... 11-20
General firewall terms ...................................... 11-20

Contents 5
G
Basic IP packet components............................. 11-21
Basic protocol types......................................... 11-21
Firewall design rules......................................... 11-22
Filter basics..................................................... 11-24
Example filters................................................. 11-25
Chapter 12 — Monitoring Tools...............................................12-1
Quick View status overview .......................................... 12-1
General status................................................... 12-2
Current status ................................................... 12-3
Status lights...................................................... 12-3
Statistics & Logs......................................................... 12-4
Event histories ............................................................ 12-4
IP Routing Table........................................................... 12-7
General Statistics........................................................ 12-7
System Information...................................................... 12-9
SNMP......................................................................... 12-9
The SNMP Setup screen................................... 12-10
SNMP traps..................................................... 12-11
Chapter 13 — Utilities and Diagnostics...................................13-1
Ping............................................................................ 13-2
Trace Route................................................................. 13-4
Telnet client................................................................. 13-5
Factory defaults........................................................... 13-6
Transferring configuration and firmware files with TFTP.... 13-7
Updating firmware.............................................. 13-7
Downloading configuration files ........................... 13-8
Uploading configuration files ............................... 13-9
Transferring configuration and firmware files with
XMODEM..................................................................... 13-9
Updating firmware............................................ 13-10
Downloading configuration files ......................... 13-11
Uploading configuration files ............................. 13-11

6 User’s Reference Guide
Restarting the system................................................ 13-12
Appendix A — Troubleshooting..................................................A-1
Configuration problems .................................................. A-1
Console connection problems ............................... A-2
Network problems................................................ A-2
How to reset the router to factory defaults ...................... A-3
Power outages............................................................... A-3
Technical support .......................................................... A-4
How to reach us................................................... A-4
Appendix B — Technical Specifications and Safety Information ..B-1
Description.................................................................... B-1
Power requirements ............................................. B-1
Environment ........................................................ B-1
Software and protocols......................................... B-1
Agency approvals........................................................... B-1
Regulatory notices ............................................... B-2
Important safety instructions................................ B-4
Limited Warranty and Limitation of Remedies-Revised January 2002

Introduction 1-1
CC
CChh hhaa aapp pptt ttee eerr rr 11 11
IIIInn
nntt ttrr rroo oodd dduu uucc cctt ttiiiioo oonn nn
Overview
The Netopia 4541/4542 ADSL Router is a full-featured, stand-alone DSL router for connecting diverse local
area networks (LANs) to the Internet and other remote networks. The Netopia 4541/4542 ADSL Router uses a
high performance telecommunications line to provide your whole network with a high-speed connection to the
outside world. Model 4541 is designed for North American users; model 4542 is designed for non-North
American users. Both support the same features.
This section covers the following topics:
■
“Features and capabilities” on page 1-1
■
“How to use this guide” on page 1-2
Features and capabilities
The Netopia 4541/4542 ADSL Router provides the following features:
■
Support for IP routing for Internet and Intranet connectivity
■ ADSL WAN interface supports symmetric data rates from 144 kbps to 2.32 Mbps
■
Built-in VPN features offer secure Internet connections between remote offices and travelers
■
Built-in firewall protects LAN resources from Internet intruders
■
Support for Ethernet LANs with multiple Ethernet IP subnets
■
10/100-Base T Ethernet port connects easily to an existing LAN hub
■
Interoperable with a wide array of DSLAM equipment
■
Console-based Telnet client
■ UNIX syslog client
■
Status lights (LEDs) for easy monitoring and troubleshooting
■
Support for Console-based management
■
NAT/NATP, multi-NAT, and DHCP for security and convenience
■
Wall-mountable, Bookshelf (Side-stackable), or Desktop-stackable design for efficient space usage

1-2 User’s Reference Guide
How to use this guide
In addition to the simple documentation contained in the accompanying Getting Started Guide , this guide is
designed to be your single source for information about your Netopia 4541/4542 ADSL Router. It is intended to
be viewed on-line, using the powerful features of the Adobe Acrobat Reader. The information display has been
deliberately designed to present the maximum information in the minimum space on your screen. You can keep
this document open while you perform any of the procedures described, and find useful information about the
procedure you are performing.
You can also print out all of the manual, or individual sections, if you prefer to work from hard copy rather than
on-line documentation. The pages are formatted to print on standard 8 1/2 by 11 inch paper. We recommend
that you print on 3-hole punched paper, so that you can put the pages in a binder for future reference. For your
convenience, a printed copy is available from Netopia. Order part number TE4541/Doc.
This guide is organized into chapters describing the Netopia 4541/4542’s advanced features. You may want to
read each chapter’s introductory section to familiarize yourself with the various features available.
Use the guide’s table of contents and index to locate informational topics.