Netopia 3381-ENT User manual

Netopia™ 3381-ENT
Cable/DSL Router
Getting Started Guide
M
AKING
B
ROADBAND
W
ORK
™

Copyright
©2003 Netopia, Inc., v.023003
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 and Cayman are registered trademarks, and “Making Broadband Work” is a
trademark of Netopia, Inc. All rights reserved.
Netopia, Inc.
6001 Shellmound Street, 4th Floor
Emeryville, CA 94608
U.S.A.
Part Number
For additional copies of this electronic manual, order Netopia part number 6161152-00-01

Contents 3
G
Chapter 1 — Introduction..........................................................1-5
Overview ....................................................................... 1-5
Features and Capabilities............................................... 1-5
How to Use this Guide.................................................... 1-6
Chapter 2 — Making the Physical Connections..........................2-1
Find a Location.............................................................. 2-1
What You Need.............................................................. 2-1
Important Safety Instructions ......................................... 2-2
Identify the Connectors and Attach the Cables ................. 2-3
Netopia 3381-ENT Cable/DSL Router Status Lights ......... 2-6
Chapter 3 — Connecting to Your Local Area Network.................3-1
Readying Computers on Your Local Network..................... 3-1
Connecting to an Ethernet Network ................................. 3-2
Chapter 4 — Sharing the Connection.........................................4-1
Configuring TCP/IP on Windows-based Computers............ 4-1
Dynamic configuration (recommended)................... 4-1
Static configuration (optional)................................ 4-3
Configuring TCP/IP on Macintosh Computers ................... 4-4
Dynamic configuration (recommended)................... 4-5
Static configuration (optional)................................ 4-5
Chapter 5 — Telnet-Based Management....................................5-1
Connecting through a Telnet Session............................... 5-2
Configuring Telnet software ................................... 5-2
Navigating through the Telnet Screens............................. 5-3
Chapter 6 — Easy Setup ...........................................................6-1
Easy Setup Telnet Screens ............................................. 6-1
Accessing the Easy Setup Telnet screens............... 6-1
Quick Easy Setup Connection Path.................................. 6-2
1. WAN Ethernet Configuration .............................. 6-4
2. Easy Setup Profile ............................................ 6-4
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4 Getting Started Guide
3. IP Easy Setup .................................................. 6-6
4. Easy Setup Security Configuration ..................... 6-7
Appendix A — Technical Specifications and Safety Information ..A-1
Description.................................................................... A-1
Power requirements ............................................. A-1
Environment ........................................................ A-1
Software and protocols......................................... A-1
Agency approvals........................................................... A-2
Regulatory notices ............................................... A-2
Manufacturer’s Declaration of Conformance .................... A-3
Important Safety Instructions ......................................... A-4
FCC Part 68 Information................................................. A-5
Electrical Safety Advisory ............................................... A-6

Introduction 1-5
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Overview
The Netopia 3381-ENT Cable/DSL Router is a full-featured, stand-alone Ethernet router for connecting diverse
local area networks (LANs) to the Internet and other remote networks. The Netopia 3381-ENT Cable/DSL
Router connects easily to the Ethernet port of your cable or DSL modem to provide your whole network with a
high-speed connection to the outside world.
This section covers the following topics:
• “Features and Capabilities” on page 1-5
• “How to Use this Guide” on page 1-6
Features and Capabilities
The Netopia 3381-ENT Cable/DSL Router provides the following features:
• 10-BaseTX Ethernet WAN port to connect to any broadband modem, such as DSL or Cable
• LAN interfaces support USB 1.1 and 10/100BaseTX with Auto-crossover, RJ-45
• Point-to-Point Protocol (PAP/CHAP authentication)
• PPP over Ethernet Gateway
• PPP over Ethernet pass-through
• Transparent bridging option
• Support for IP routing for Internet connectivity
• Numbered or unnumbered WAN interface
• Support for Ethernet LANs with up to eight Ethernet IP subnets
• NAT/NAPT, Multi-NAT, and DHCP (client, server, and relay) for security and convenience
• DNS proxy
• IP Multicast Forwarding, IGMP V1, V2
• RIP1 and RIP2, static routes
• IP QoS: TOS bit prioritization
• VPN Pass-through for PPTP and IPSec
• Built-in VPN gateway features offer support for up to 15 PPTP or IPSec VPN tunnels

1-6 Getting Started Guide
• IPSec implementation supports DES or 3DES encryption, MD5 or SHA1 encapsulation, and manual or IKE
keying
• Built-in firewall protects LAN resources from Internet intruders
• Backup Default Gateway feature with an external router enables high-availability solutions
• Menu-driven or CLI interfaces via Telnet
• Easy Setup with menu-driven interface
• Tiered Access, 2 levels of configuration access
• Configuration Management, up to 3 backup configurations
• TFTP download/upload of new firmware and configuration files
• System diagnostics and logs
• SNMP V1 and V2 (read/write access)
• Management utilities: ICMP ping, trace route, Telnet client, and Syslog client
• Status lights (LEDs) for easy monitoring and troubleshooting
• Wall-mountable, Bookshelf (Side-stackable), or Desktop-stackable design for efficient space usage
How to Use this Guide
In addition to the documentation contained in the accompanying Firmware User’s Guide , this guide is designed
to get you up and running and connected to your local area network and the Internet. 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.
This guide is organized into chapters describing the Netopia 3381-ENT’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.

Making the Physical Connections 2-1
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This section tells you how to make the physical connections to your Netopia 3381-ENT Cable/DSL Router. This
section covers the following topics:
• “Find a Location” on page 2-1
• “What You Need” on page 2-1
• “Identify the Connectors and Attach the Cables” on page 2-3
• “Netopia 3381-ENT Cable/DSL Router Status Lights” on page 2-6
Find a Location
When choosing a location for the Netopia Cable/DSL Router, consider:
• Available space and ease of installation
• Physical layout of the building and how to best use the physical space available for connecting your Netopia
Cable/DSL Router to the LAN
• Available wiring and jacks
• Distance from the point of installation to the next device (length of cable or wall wiring)
• Ease of access to the front of the unit for configuration and monitoring
• Ease of access to the back of the unit for checking and changing cables
• Cable length and network size limitations when expanding networks
For small networks, install the Netopia 3381-ENT near one of the LANs. For large networks, you can install the
Netopia 3381-ENT in a wiring closet or a central network administration site.
WhatYou Need
Locate all items that you need for the installation.
Included in your router package are:
• The Netopia 3381-ENT Cable/DSL Router
• A power adapter and cord
• One Category 5 Ethernet cable
• One USB cable
• One RJ-45 Modem cable

2-2 Getting Started Guide
• The Netopia CD containing software and documentation
You will need:
• A Windows–based PC or a Macintosh computer with Ethernet connectivity for configuring the Netopia
3381-ENT. This may be built-in Ethernet or an add-on card, with TCP/IP installed and configured. See
“Sharing the Connection” on page 4-1.
• A DSL wall outlet wired for a connection to a telephone carrier who supports Asymmetric Digital Subscriber
Line (ADSL) connections.
Important Safety Instructions
CAUTION: Depending on the power supply provided with the product, either the direct plug-in power supply
blades, power supply cord plug or the appliance coupler serves as the main power disconnect. It is
important that the direct plug-in power supply, socket-outlet or appliance coupler be located so it is readily
accessible.
CAUTION (North America Only): For use only with a CSA Certified or UL Listed Limited Power Source or
Class 2 power supply, rated 12Vdc, 1.5A.
CAUTION (Europe Only): For use only with a GS approved Limited Power Source, rated 12Vdc, 1.5A.
TELECOMMUNICATION INSTALLATION CAUTIONS
When using your telephone equipment, basic safety precautions should always be followed to reduce the
risk of fire, electric shock and injury to persons, including the following:
1. Do not use this product near water, for example, near a bathtub, wash bowl, kitchen sink or laundry
tub, in a wet basement or near a swimming pool.
2. Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote
risk of electrical shock from lightning.
3. Do not use the telephone to report a gas leak in the vicinity of the leak.
SAVE THESE INSTRUCTIONS

Making the Physical Connections 2-3
Identify the Connectors and Attach the Cables
Identify the connectors and switches on the back panel and attach the necessary Netopia Router cables.
Netopia 3381-ENT back panel
.
Port Description
Modem port An RJ-45 jack labeled Modem to connect to the Ethernet port of your cable or DSL
modem.
Ethernet port An RJ-45 10/100Base-T Ethernet jack. You can use this to configure the Netopia
3381-ENT. You can either connect your computer directly to an Ethernet port using the
supplied Category 5 Ethernet cable, or connect both your computer and the Netopia
3381-ENT to an existing LAN environment. The Ethernet port is auto-sensing,
eliminating the need for a crossover cable.
USB port A USB jack. You can use this to configure the Netopia 3381-ENT. You can connect your
computer directly to the USB port using the supplied USB cable.
Power port A DC power adapter cable connection.
Modem port
Ethernet
USB Port
port Power port

2-4 Getting Started Guide
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Connect your computer, DSL line, and power source as shown.
1. For a direct computer to router Ethernet connection, use the standard Ethernet cable included with your
router.
2. Use the supplied RJ-45 Modem cable to connect the router to your cable or DSL modem’s Ethernet port. Be
sure your cable or DSL modem is correctly installed according to its instructions.
3. Connect the supplied power brick to a power outlet and the connector end to the router.
You should now have: the power adapter plugged in; the Ethernet cable connected between the router and your
computer; and the Modem cable connected between the router and the cable or DSL modem. The cable or DSL
modem should be connected to its appropriate wall jack.
1
Modem
Ethernet DC Power
23
DSL or Cable
Modem

Making the Physical Connections 2-5
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You will need to install USB drivers onto your computer if you want to use the USB port. USB driver installers for
Windows and Macintosh are included on the Netopia CD.
Connect your computer, DSL line, and power source as shown.
1. Run the USB driver installer program from the Netopia CD to install USB drivers on your Windows PC or
Macintosh. Follow the on screen instructions.
2. For a direct computer to router connection, use the USB cable included with your router.
3. Use the supplied RJ-45 Modem cable to connect the router to your cable or DSL modem’s Ethernet port. Be
sure your cable or DSL modem is correctly installed according to its instructions.
4. Connect the supplied power brick to a power outlet and the connector end to the router.
You should now have: the power adapter plugged in; the USB cable connected between the router and your
computer; and the Modem cable connected between the router and the cable or DSL modem. The cable or DSL
modem should be connected to its appropriate wall jack.
2
Modem USB DC Power
34
DSL or Cable
Modem

2-6 Getting Started Guide
Netopia 3381-ENT Cable/DSL Router Status Lights
The figure below represents the Netopia 3381-ENT status light (LED) panel.
Netopia 3381-ENT status indicator lights
Power:
USB:
Modem Link:
Solid green when the power is on
Solid green when connected
Solid green when connected
ModemTraffic:
Flashes green for activity on the modem port
EthernetTraffic:
Flashes green when there is
activity on the LAN
Ethernet Link:
Solid green when connected

Connecting to Your Local Area Network 3-1
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This chapter describes how to physically connect the Netopia 3381-ENT to your local area network (LAN). Before
you proceed, make sure the Netopia 3381-ENT is properly configured. You can customize the router’s
configuration for your particular LAN requirements using console-based management (see “Telnet-Based
Management” on page 5-1).
This section covers the following topics:
•“Readying Computers on Your Local Network” on page 3-1
•“Connecting to an Ethernet Network” on page 3-2
Readying Computers onYour Local Network
PC and Macintosh computers must have certain components installed before they can communicate through
the Netopia 3381-ENT. The following illustration shows the minimal requirements for a typical PC or Macintosh
computer.
Application software: This is the software you use to send e-mail, browse the World Wide Web, read
newsgroups, etc. These applications may require some configuration. Examples include the Eudora e-mail client
and the Web browsers Microsoft Internet Explorer and Netscape Navigator.
TCP/IP stack: This is the software that lets your PC or Macintosh computer communicate using Internet
protocols. TCP/IP stacks must be configured with some of the same information you used to configure the
Netopia 3381-ENT. There are a number of TCP/IP stacks available for PC computers. Windows 95 includes a
built-in TCP/IP stack. Macintosh computers use either MacTCP or Open Transport. See “Configuring TCP/IP on
Windows-based Computers” on page 4-1. Macintosh computers use either MacTCP or Open Transport. See
“Configuring TCP/IP on Macintosh Computers” on page 4-4.
Ethernet Driver
TCP/IP stack
Application software
Your PC
or Macintosh
computer
To the Netopia

3-2 Getting Started Guide
Ethernet: Ethernet hardware and software drivers enable your PC or Macintosh computer to communicate on
the LAN.
Once the Netopia 3381-ENT is properly configured and connected to your LAN, PC and Macintosh computers
that have their required components in place will be able to connect to the Internet or other remote IP networks.
Connecting to an Ethernet Network
You can connect a standard 10/100Base-T Ethernet network to the Netopia 3381-ENT using its Ethernet port.
Netopia 3381-ENT back panel
If you add devices connected through a hub or switch, connect the hub or switch to the Ethernet port on the
Netopia 3381-ENT.
The Netopia 3381-ENT in a 10/100Base-T network
Macintosh
PC
PC
Ethernet
Switch
To connect your 10/100Base-T
network to the Netopia 3381-ENT
through the Ethernet port, use
standard Category 5 Ethernet
cables with RJ-45 connectors.
You can attach additional devices
using standard Category 5
Ethernet cables (not provided)
connected to a 10- or 100Base-T
Ethernet hub or switch. The ports
on the router will auto detect 10-
or 100Base-T. Crossover cables
are not required.
PC

Sharing the Connection 4-1
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Once you have set up your physical local area network, you will need to configure the TCP/IP stack on each
client workstation connected to your Netopia 3381-ENT. This chapter describes how to configure TCP/IP for
both Windows-based and Macintosh computers.
This chapter explains the following topics:
•“Configuring TCP/IP on Windows-based Computers” on page 4-1
•“Configuring TCP/IP on Macintosh Computers” on page 4-4
ConfiguringTCP/IP on Windows-based Computers
Configuring TCP/IP on a Windows computer requires the following:
•An Ethernet card (also known as a network adapter)
•The TCP/IP protocol must be “bound” to the adapter or card
Dynamic configuration (recommended)
To configure your PC for dynamic addressing do the following:

4-2 Getting Started Guide
Note: You can also use these instructions to configure other computers on your network to accept IP addresses
served by the Netopia 3381-ENT.
1. Go to the Start
Menu/Settings/Control
Panels and double click
the Network icon. From
the Network components
list, select the
Configuration tab.
2. Select TCP/IP-->Your Network Card. Then select
Properties. In the TCP/IP Properties screen, select the IP
Address tab. Click “Obtain an IP Address automatically”.
3. Click on the DNS Configuration tab. Click Disable DNS.
DNS will be assigned by the router with DHCP.
4. Click OK in this window and the next window. When
prompted, reboot the computer.

Sharing the Connection 4-3
Static configuration (optional)
If you are manually configuring for a fixed or static IP address, perform the following:
1. Go to Start Menu/Settings/Control Panels and double click the Network icon. From the Network
components list, select the Configuration tab.
2. Select TCP/IP-->Your Network Card. Then select Properties. In the TCP/IP Properties screen, select the
IP Address tab. Click “Specify an IP Address.”
Enter the following:
IP Address: 192.168.1.2
Subnet Mask: 255.255.255.0
This address is an example of one that can be used to configure the router. Your ISP or network
administrator may ask you to use a different IP address and subnet mask.

4-4 Getting Started Guide
4. Click OK in this window and the next window. When prompted, reboot the computer.
Note: You can also use these instructions to configure other computers on your network with manual or static
IP addresses. Be sure each computer on your network has its own IP address.
ConfiguringTCP/IP on Macintosh Computers
The following is a quick guide to configuring TCP/IP for MacOS computers. Configuring TCP/IP in a Macintosh
computer requires the following:
•You must have either Open Transport or Classic Networking (MacTCP) installed.
If you want to use the Dynamic Host Configuration Protocol (DHCP) server built into your Netopia 3381-ENT
to assign IP addresses to your Macintoshes, you must be running Open Transport, standard in MacOS 8
and higher and optional in earlier system versions.
•You must have built-in Ethernet or a third-party Ethernet card and its associated drivers installed in your
Macintosh.
Click on the DNS Configuration tab. Click Enable DNS.
Enter the following
information:
Host: Type the name
you want to give to
this computer.
Domain: Type your
domain name. If you
don't have a domain
name, type your ISP's
domain name; for
example,
netopia.com.
DNS Server Search
Order: Type the
primary DNS IP
address given to you
by your ISP. Click
Add. Repeat this process for the secondary DNS.
Domain Suffix Search Order: Enter the same domain
name you entered above.
3. Click on the Gateway tab (shown below).
Under “New gateway,” enter
192.168.1.1. Click Add. This is the
Netopia 3381-ENT’s pre-assigned IP
address.

Sharing the Connection 4-5
Dynamic configuration (recommended)
The Dynamic Host Configuration Protocol (DHCP), which enables dynamic addressing, is enabled by default in
the router. To configure your Macintosh computer for dynamic addressing do the following:
Note: You can also use these instructions to configure other computers on your network to accept IP addresses
served by the Netopia 3381-ENT.
Static configuration (optional)
1. Go to the Apple menu. Select Control Panels and then
TCP/IP.
2. With the TCP/IP window open, go to the Edit menu and
select User Mode. Choose Basic and click OK.
3. In the TCP/IP window, select “Connect via: Ethernet” and
“Configure: Using DHCP Server.”
If you are manually configuring for a fixed or static IP address,
perform the following:
1. Go to the Apple menu. Select Control Panels and then
TCP/IP or MacTCP.
2. With the TCP/IP window open, go to the Edit menu and
select User Mode. Choose Advanced and click OK.
Or, in the MacTCP window, select Ethernet and click the
More button.

4-6 Getting Started Guide
3. In the TCP/IP window or in the MacTCP/More window, select or type information into the fields as shown in
the following table.
4. Close the TCP/IP or MacTCP control panel and save the settings.
5. If you are using MacTCP, you must restart the computer. If you are using Open Transport, you do not need
to restart.
Note: You can use these instructions to configure other computers on your network to accept IP addresses
served by the Netopia 3381-ENT.
You can also use these instructions to configure other computers on your network with manual or static IP
addresses. Be sure each computer on your network has its own IP address.
More information about configuring your Macintosh computer for TCP/IP connectivity through a Netopia
3381-ENT can be found in Technote NIR_026, “Open Transport and Netopia Routers,” located on the Netopia
Web site.
Option: Select/Type:
Connect via: Ethernet
Configure: Manually
IP Address: 192.168.1.2
Subnet mask: 255.255.255.0
Router or Gateway address: 192.168.1.1
Name server address: Enter the primary and secondary name server
addresses given to you by your ISP
Implicit Search Path:
Starting domain name:
Enter your domain name; if you do not have a
domain name, enter the domain name of your ISP