SMC Networks DORY3A User Manual
Comcast Wireless Cable Modem Gateway
`
FastFind Links
Getting to Know the Gateway
SMCD3GNV User Manual
Installing the Gateway
Preconfiguration Guidelines
Configuring the Gateway
Configuring the Gateway’s mso Interface
SMC Networks
20 Mason
Irvine, CA. 92618
U.S.A.
Copyright © 2012 SMC Networks
All Rights Reserved
Information furnished by SMC Networks, Inc. (SMC) is believed to be accurate and reliable. However,
no responsibility is assumed by SMC for its use, or for any infringements of patents or other rights of
third parties which may result from its use. No license is granted by implication or otherwise under
any patent or patent rights of SMC. SMC reserves the right to change specifications at any time
without notice
No part of this publication may be reproduced or transmitted in any form or by any means, electronic
or mechanical, including photocopying and recording, or stored in a database or retrieval system for
any purpose without the express written permission of SMC.
Microsoft and Windows are registered trademarks of Microsoft Corporation. Apple and Macintosh are
registered trademarks of Apple, Inc. All other brands, product names, trademarks, or service marks
are property of their respective owners.
This product (Model :SMCD3G2GNV) includes software code developed by third parties, including
software code subject to the GNU General Public License (“GPL”) or GNU Lesser General Public
License (LGPL”). As applicable, the terms of the GPL and LGPL, and information on obtaining access
to the GPL code and LGPL used in this product, are available to you at http://gpl.smc.com/. The GPL
code and LGPL code used in this product is distributed WITHOUT ANY WARRANTY and is subject to
the copyrights of one or more authors. For details, see the GPL Code and LGPL Code for this product
and the terms of the GPL and LGPL.
SMCD3GNV Wireless Cable Modem Gateway User Manual
May 8, 2012
Contents
Preface .................................................................................................................... vii
Key Features ............................................................................................................. viii
Document Organization .............................................................................................. ix
Document Conventions .............................................................................................. ix
Safety and Warnings ............................................................................................ ix
Typographic Conventions ............................................................................................ x
1 Getting to Know the Gateway ............................................................................ 11
Unpacking Package Contents ................................................................................... 12
System Requirements ............................................................................................... 12
Front Panel ................................................................................................................ 13
Rear Panel ................................................................................................................ 15
Top Panel .................................................................................................................. 16
Bottom Panel ............................................................................................................. 16
Using the Reset Button ............................................................................................. 17
2 Installing the Gateway ........................................................................................ 18
Finding a Suitable Location ....................................................................................... 19
Installing a Battery ..................................................................................................... 20
Connecting to the LAN .............................................................................................. 21
Connecting the WAN ................................................................................................. 22
Connecting to the Public Telephone Network ........................................................... 22
Powering on the Gateway ......................................................................................... 23
3 Preconfiguration Guidelines .............................................................................. 24
Configuring Your Computer for TCP/IP ..................................................................... 25
Configuring Microsoft Windows 2000 .................................................................. 25
Configuring Microsoft Windows XP ..................................................................... 26
Configuring Microsoft Windows Vista .................................................................. 27
Configuring Microsoft Windows 7 ........................................................................ 30
Configuring an Apple
Disabling Proxy Settings ........................................................................................... 34
Disabling Proxy Settings in Internet Explorer ...................................................... 34
Disabling Proxy Settings in Firefox ...................................................................... 34
Disabling Proxy Settings in Safari ....................................................................... 35
Disabling Firewall and Security Software .................................................................. 35
Confirming the Gateway’s Online Status ................................................................... 35
®
Macintosh® Computer ..................................................... 33
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Confirming Your Computer’s Link Status .................................................................. 35
4 Configuring the Gateway ................................................................................... 36
Accessing the Gateway’s Web Management ............................................................ 37
Understanding the Web Management Interface Menus ............................................ 38
Web Management Interface Menus .......................................................................... 40
Viewing Information About Your Network and Connected Devices ..................... 42
Viewing Information About Your Network and Connections ................................ 43
Viewing the Gateway’s Connection Status .................................................... 44
Viewing Comcast Network Information .......................................................... 46
Viewing and Editing Your Local IP Configuration .......................................... 47
Viewing and Editing Wireless Configuration .................................................. 49
Configuring Firewall Settings ............................................................................... 53
Viewing System Software Settings ...................................................................... 55
Configuring System Hardware ............................................................................. 56
Viewing System Hardware Settings .............................................................. 56
Viewing Battery Settings ................................................................................ 57
Viewing LAN Ethernet Settings ..................................................................... 58
Viewing Wi-Fi Settings ................................................................................... 59
Configuring Your Home Network ......................................................................... 60
Working with Connected Devices ........................................................................ 64
Manually Adding Computers with Static IP Addresses to the Wireless
Network ............................................................................................ 65
Configuring Parental Controls ............................................................................. 68
Blocking Sites and Keywords, and Selecting Trusted Computers ................. 68
Blocking Services .......................................................................................... 75
Managing Devices and Access Types ........................................................... 78
Generating Reports ....................................................................................... 82
Using Advanced Features ................................................................................... 84
Enabling or Disabling Port Forwarding .......................................................... 84
Enabling or Disabling Port Triggering ............................................................ 87
Enabling or Disabling Port Blocking ..............................................................
overing Devices ...................................................................................... 92
Disc
Troubleshooting the Gateway .............................................................................. 94
Defining Log Filters ........................................................................................ 94
Testing Connectivity to Destination and IP Addresses .................................. 96
Restoring or Rebooting the Gateway ............................................................ 98
Changing the Login Password ....................................................................... 99
91
5 Configuring the Gateway’s mso Interface ...................................................... 100
Accessing the Gateway’s Web Management .......................................................... 101
Understanding the Web Management Interface Menus .......................................... 102
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Web Management Interface Menus ........................................................................ 104
Configuring the Gateway Settings ..................................................................... 106
Viewing At-a-Glance Configuration Settings................................................ 107
Configuring Email Notifications .................................................................... 108
Configuring Connections ................................................................................... 110
Viewing the Gateway’s Connection Status .................................................. 111
Viewing and Editing Your Local IP Configuration ........................................ 112
Viewing and Editing Wireless Configuration ................................................ 114
Viewing XFINITY Network Information ........................................................ 121
Configuring Firewall Settings ............................................................................. 123
Viewing System Software Settings .................................................................... 125
Configuring Hardware ........................................................................................ 126
Viewing System Hardware Settings ............................................................ 127
Viewing Battery Settings .............................................................................. 128
Viewing LAN Ethernet Settings ................................................................... 129
Viewing Wi-Fi Settings ................................................................................. 130
Configuring Your Home Network ....................................................................... 131
Working with Connected Devices ...................................................................... 135
Manually Adding Computers with Static IP Addresses ................................ 136
Manually Adding Wireless Clients ............................................................... 139
Configuring Parental Controls ........................................................................... 142
Blocking Sites and Keywords, and Selecting Trusted Computers ............... 142
Blocking Services and Selecting Trusted Computers .................................. 148
Managing Devices and Access Types ......................................................... 152
Generating Reports ..................................................................................... 156
Using Advanced Features ................................................................................. 157
Enabling or Disabling Port Forwarding ........................................................ 157
Enabling or Disabling Port Triggering .......................................................... 160
Remote Management .................................................................................. 163
Configuring DMZ Settings ...........................................................................
Configuri
ng Routing Settings ....................................................................... 167
165
Configuring Dynamic DNS Settings ............................................................. 169
Discovering Devices .................................................................................... 171
Troubleshooting the Gateway ............................................................................ 173
Generating Logs .......................................................................................... 174
Testing Connectivity to Destination and IP Addresses ................................ 175
Restoring or Rebooting the Gateway .......................................................... 177
Changing the Login Password ..................................................................... 178
6 Troubleshooting Procedures ........................................................................... 179
Basic Troubleshooting Procedures ......................................................................... 180
Advanced Troubleshooting Procedures .................................................................. 182
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Troubleshooting Physical Network Problems .................................................... 182
Troubleshooting Configuration Problems .......................................................... 183
Determining Your IP Address ...................................................................... 183
Troubleshooting Software-Interaction Problems ............................................... 187
Specific Troubleshooting Procedures ...................................................................... 188
Unable to Log In to Gateway ............................................................................. 188
Local Networked Devices Unable to Access the Gateway ................................ 188
Unable to Access the Internet ........................................................................... 189
Unable to Access Networked Devices ............................................................... 191
Using the Ping Utility to Troubleshoot ............................................................... 191
Testing the Path from a Computer to the Gateway ..................................... 191
Testing the Path from a Computer to the Internet ....................................... 192
Using Ping on a Macintosh .......................................................................... 193
Gateway Disconnects from the Internet ............................................................ 194
Slow Web Browsing ........................................................................................... 195
Unable to Configure Port Forwarding ................................................................ 195
Unable to Use Pass-thru VPN ........................................................................... 195
Gateway is Not Passing DHCP Address to a computer .................................... 195
Determining a Computer’s MAC Address .......................................................... 196
Microsoft Windows ...................................................................................... 196
Apple Macintosh Windows OS X ................................................................. 197
Wireless Troubleshooting ........................................................................................ 198
Checking the Gateway’s Wireless Connection .................................................. 198
Wireless Range is Low ...................................................................................... 198
Unable to Connect to a Wireless Network Using Windows XP and Vista ......... 199
Achieving Optimal Wireless Performance ......................................................... 201
Guidelines for Improving Your Wireless Network .............................................. 201
Wireless IEEE 802.11n Guidelines .................................................................... 202
Application and Gaming Troubleshooting ............................................................... 204
Connecting to Messenger Services Behind the Gateway .................................
Connecting
to America Online Behind the Gateway ......................................... 204
204
Connecting to XBox Live, PSP, and Nintendo WFC ......................................... 204
Appendix A - Specifications ............................................................................... 205
Appendix B - Compliances ................................................................................. 209
Index ..................................................................................................................... 211
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Preface
The SMCD3GNV Wireless Cable Modem Gateway is the ideal all-in-one wired and wireless
solution for the home or business environment. SMC is proud to provide you with a powerful,
yet simple communication device for connecting your local-area network (LAN) to the
Internet.
This user manual contains all the information you need to install and configure your new
SMCD3GNV Wireless Cable Modem Gateway.
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Preface
Key Features
The following list summarizes the Gateway’s key features.
Integrated, CableLabs-compliant DOCSIS 1.1/ 2.0 /3.0 cable modem.
Integrated cable modem port for Internet connection to cable modem service.
Four 10/100/1000 Mbps Auto-Sensing LAN ports with Auto-MDI/MDIX.
High-speed 300 Mbps IEEE 802.11n Wireless Access Point.
Dynamic Host Configuration Protocol (DHCP) for dynamic IP configuration, and Domain
Name System (DNS) for domain name mapping.
One USB 2.0 port.
Two Plain Old Telephone System (POTS) RJ-11 telephone ports to allow Public Switch
Telephone Network (PSTN) analog phone connections.
IEEE 802.11 b/g/n interoperability with multiple vendors.
Wireless WEP, WPA, and WPA2 encryption, Hide SSID, and MAC Filtering.
VPN pass-through support using PPTP, L2TP, or IPSec.
Advanced SPI firewall Gateway for enhanced network security from attacks over the
Internet:
– Firewall protection with Stateful Packet Inspection
– Client privileges
– Hacker prevention
– Protection from denial of service (DoS) attacks
– Network Address Translation (NAT)
Universal Plug and Play (UPnP) enables any UPnP device seamlessly.
Quality of Service (QoS) ensures high-quality performance with existing networks.
Effortless plug-and-play installation.
Intuitive graphical user interface (GUI) configuration, regardless of operating system.
Comprehensive front panel LEDs for network status and troubleshooting.
Compatible with all popular Internet applications.
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Preface
Document Organization
This document consists of four chapters and two appendixes.
Chapter 1 - describes the contents in the Gateway package, system requirements, and
an overview of the Gateway’s front, rear, top, and bottom panels.
Chapter 2 - describes how to install the Gateway.
Chapter 3 - describes how to configure TCP/IP settings on the computer you will use to
configure the Gateway.
Chapter 4 - describes how to configure the Gateway.
Chapter 6 – provides troubleshooting information you can use in the unlikely event you
encounter a problem with the Gateway.
Appendix A - lists the Gateway’s specifications.
Appendix B - contains compliance information.
Document Conventions
This document uses the following conventions to draw your attention to certain information.
Safety and Warnings
This document uses the following symbols to draw your attention to certain information.
Symbol Meaning Description
Note Notes emphasize or supplement important points of the main text.
Tip Tips provide helpful information, guidelines, or suggestions for performing tasks more
Warning Warnings indicate that failure to take a specified action could result in damage to the
Electric Shock Hazard This symbol warns users of electric shock hazard. Failure to take appropriate
effectively.
device.
precautions such as not opening or touching hazardous areas of the equipment could
result in injury or death.
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Preface
Typographic Conventions
This document also uses the following typographic conventions.
Convention Description
Bold Indicates text on a window, other than the window title, including menus, menu options, buttons, fields, and labels.
Italic Indicates a variable, which is a placeholder for actual text provided by the user or system. Angled brackets (< >)
are also used to indicate variables.
screen/code Indicates text that is displayed on screen or entered by the user.
< > angled
brackets
[ ] square
brackets
{ } braces Indicates required or expected values.
| vertical bar Indicates that you have a choice between two or more options or arguments.
Indicates a variable, which is a placeholder for actual text provided by the user or system. Italic font is also used to
indicate variables.
Indicates optional values.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
1 Getting to Know the Gateway
Before you install your SMCD3GNV Wireless Cable Modem Gateway, check the package
contents and become familiar with the Gateway’s front and back panels.
The topics covered in this chapter are:
Unpacking Package Contents (page 12)
System Requirements (page 12)
Front Panel (page 13)
Rear Panel (page 15)
Bottom Panel (page 16)
Top Panel (16)
Using the Reset Button (page 17)
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Getting to Know the Gateway
Unpacking Package Contents
Unpack the items in your SMCD3GNV Wireless Cables Modem Gateway contents and
confirm that no items are missing or damaged. Your package should include:
One SMCD3GNV Wireless Cable Modem Gateway
One 2600 mAh battery
One Category 5E Ethernet cable
If any items are missing or damaged, please contact your cable service provider. Keep the
carton, including the original packing material, in case you need to store the product or
return it.
System Requirements
To complete your installation, you will need the following items:
Provisioned Internet access on a cable network that supports cable modem service.
A computer with a wired network adapter with TCP/IP installed.
A Java-enabled Web browser, such as Microsoft Internet Explorer 5.5 or above.
Microsoft
An analog telephone and two RJ-11 cables if you want to connect the Gateway to an
®
Windows® 2000 or higher for USB driver support.
analog telephone and PSTN telephone line.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Getting to Know the Gateway
Front Panel
The front panel of your SMCD3GNV Wireless Cable Modem Gateway contains a set of lightemitting diode (LED) indicators. These LEDs show the status of the Gateway and simplify
troubleshooting.
Figure 1 shows the front panel of the SMCD3GNV Wireless Cable Modem Gateway. Table 1
describes the front panel LEDs.
Figure 1. Front Panel of the SMCD3GNV Wireless Cable Modem Gateway
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Getting to Know the Gateway
Table 1. Front Panel LEDs
LED Color Description
POWER White ON = power is supplied to the Gateway.
OFF = power is not supplied to the Gateway.
US/DS White Blinking = ranging is in progress.
ON = ranging is complete on 1 channel only.
OFF = scanning for DS channel.
DS White Blinking = scanning for DS channel.
ON = synchronized on 1 channel only.
US and DS Both US and DS blinking together = operator is performing maintenance.
Online White Blinking = cable interface is acquiring IP, ToD, CM configuration.
ON = Gateway is operational.
OFF = Gateway is offline.
WiFi White Blinking = data is transmitting over the Gateway’s Wi-Fi interface.
ON = Wi-Fi is enabled.
OFF = Wi-Fi is disabled.
Tel1 White Blinking = telephone line 1 is in use.
ON = Gateway’s telephone 1 port is online.
OFF = Gateway’s telephone 1 port is not online.
Tel2 White Blinking = telephone line 2 is in use.
ON = Gateway’s telephone 2 port is online.
OFF = Gateway’s telephone 2 port is not online.
Battery White Blinking = Gateway battery power is low. Please apply AC power as soon as possible.
ON = Gateway is operating from battery power.
OFF = Gateway is operating from AC power.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Getting to Know the Gateway
Rear Panel
The rear panel of your SMCD3GNV Wireless Cable Modem Gateway contains a reset
button and the ports for attaching the supplied power adapter and making additional
connections. Figure 2 shows the rear panel components and Table 2 describes their
meanings.
Figure 2. Rear View of the SMCD3GNV Wireless Cable Modem Gateway
Table 2. SMCD3GNV Wireless Cable Modem Gateway Rear Panel Components
Item Description
Reset button Use this button to reset the power or restore the default factory settings (see “Using the Reset
Button” on page 17).
USB USB 2.0 high-speed port for USB-enabled peripherals.
Tel 1-2 Connect an analog telephone to one port and an analog (PSTN) telephone line to the other port.
Ethernet 1-4 Four 10/100/1000 auto-sensing RJ-45 switch ports. Connect devices on your LAN such as a
computer, hub, or switch to these ports. Each port has two LED lights (see Table 3 on the next
page).
Cable Connect your coaxial cable line to this port.
Power 110 VAC Connect the supplied power cord.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Getting to Know the Gateway
Table 3. Gigabit Ethernet Connectors LED Indicators
LED Description
Green Indicate 10/100/1000Mbps in use
Amber Indicate 10/100Mbps in use
Top Panel
The top panel of your SMCD3GNV Wireless Cable Modem Gateway has a WPS button for
configuring wireless security automatically. Figure 3 shows the WPS button.
Figure 3. Top View of the SMCD3GNV Wireless Cable Modem Gateway
Bottom Panel
The bottom panel of your SMCD3GNV Wireless Cable Modem Gateway contains a panel for
installing the Gateway’s battery. For information about installing the battery, see “Installing a
Battery” on page 20.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Getting to Know the Gateway
Using the Reset Button
Using the reset button on the rear panel (see Figure 2 on page 15), you can perform two
types of reset operations with the Gateway:
Software reset – this reset operation power-cycles the Gateway and retains its current
configuration settings.
Factory default reset – this operation remove all overrides made to the Gateway’s factory
default configuration and returns the Gateway to its original factory default settings.
The number of seconds you press the reset button determines which reset operation is
performed. To protect against accidental resets, the reset button is recessed on the
Gateway rear panel.
Note: You can also reset the Gateway and retain its current configuration settings using the
RESET method described under “Restoring or Rebooting the Gateway” on page 98.
To use the reset button to perform a software or factory default reset:
1. Leave power plugged into the Gateway.
2. Find the reset button at the top of the back panel, then use a thin object to press and hold
the reset button as follows:
– To perform a software reset, press the reset button for at least 10 seconds.
– To perform a factory default reset, press the reset button for at least 15 seconds.
3. Release the reset button.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
2 Installing the Gateway
This chapter describes how to install your SMCD3GNV Wireless Cable Modem Gateway.
The topics covered in this chapter are:
Finding a Suitable Location (page 19)
Installing a Battery (page 20)
Connecting to the LAN (page 21)
Connecting the WAN (page 22)
Powering on the Gateway (page 23)
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Installing the Gateway
Finding a Suitable Location
Your SMCD3GNV Wireless Cable Modem Gateway can be installed in any location with
access to the cable network. All of the cables connect to the rear panel of the Gateway for
better organization and utility. The LED indicators on the front panel are easily visible to
provide you with information about network activity and status.
For optimum performance, the location you choose should:
Be close to a working AC power outlet when powering the Gateway using AC power.
Allow at least one foot of space around the sides and top of the Gateway to provide
sufficient air flow around the device.
Not expose the Gateway to a dusty or wet environment.
Be an elevated location such as a high shelf, keeping the number of walls and ceilings
between the Gateway and your other devices to a minimum.
Be away from electrical devices that are potential sources of interference, such as ceiling
fans, home security systems, microwaves, or the base for a cordless phone.
Be away from any large metal surfaces, such as a solid metal door or aluminum studs.
Large expanses of other materials such as glass, insulated walls, fish tanks, mirrors,
brick, and concrete can also affect your wireless signal. For more information about
selecting an optimum location for wireless operation, see “Guidelines for Improving Your
Wireless Network” on page 201.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Installing the Gateway
Installing a Battery
To install a battery into the Gateway, use the following procedure.
1. Place the Gateway on its side on a table.
2. Remove battery compartment door on the bottom panel and set it aside (see Figure 4).
Figure 4. Removing the Battery Compartment Door
3. Insert the battery into the battery compartment (see Figure 5).
Figure 5. Installing the Battery
4. Close the battery compartment.
Note: Using the Battery menu in the Gateway’s Web interface, you can view status
information about the battery (see “Viewing Battery Settings” on page 57).
SMCD3GNV Wireless Cable Modem Gateway User Manual
20
Installing the Gateway
Connecting to the LAN
Using an Ethernet LAN cable, you can connect the Gateway to a desktop computer,
notebook, hub, or switch. The Gateway supports auto-MDI/MDIX, so you can use either a
standard straight-through or crossover Ethernet cable.
1. Connect either end of an Ethernet cable to one of the four Ethernet ports on the rear panel
of the Gateway (see Figure 6).
Figure 6. Connecting to an Ethernet Port on the Gateway Rear Panel
2. Connect the other end of the cable to your computer’s network-interface card (NIC) or to
another network device (see Figure 7).
Figure 7. Connecting the Gateway to the a Laptop or Desktop Computer
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Installing the Gateway
Connecting the WAN
To connect the Gateway to a Wide Area Network (WAN) interface:
3. Connect a coaxial cable to the port labeled Cable on the rear panel of the Gateway from a
cable port in your home or office (see Figure 2 on page 15). Use only manufactured coaxial
patch cables with F-type connectors at both ends for all connections.
4. Hand-tighten the connectors to secure the connection.
5. If the modem was not installed by your cable provider (ISP) or is replacing another cable
modem, contact your cable operator to register the SMCD3GNV. If the modem is not
registered with your cable operator, it will be unable to connect to the cable network
system.
Connecting to the Public Telephone Network
The rear panel of the Gateway has two RJ-11 telephone-style connectors labeled Tel 1 and
Tel 2. Each of these connectors can provide telephone service to multiple telephones, fax
machines, and analog modems.
The maximum number of telephone devices connected to each RJ-11 port is limited by the
total Ringing Load of the telephone devices that are connected. Many telephone devices are
marked with a Ringer Equivalent Number (REN). Each telephone port on the Gateway can
support up to a 5 REN load. The sum of the REN load on all of the telephone devices
attached to each port must not exceed 5 REN
Before you use the Gateway’s RJ-11 connectors to power the analog devices in your home
or office, disconnect the telephone lines from any other provider at the demarcation point. If
the incoming phone line is connected to another provider, such as an incumbent telephone
company, it can result in potentially harmful voltage to the analog telephone line.
Note: The customer or the customer's wire contractor is responsible for adhering to all local
codes for wiring.
To set up the ability to place calls using a regular analog telephone line (PSTN), perform the
following procedure.
1. Disconnect the phone lines from any other provider at the demarcation point, if appropriate.
2. Connect the RJ-11 cable on an analog device to the Tel 1 connector on the rear panel of
the Gateway.
3. Connect the RJ-11 cable on another analog device to the Tel 2 connector on the rear
panel of the Gateway.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Installing the Gateway
Powering on the Gateway
After making your connections, use the following procedure to power on the Gateway:
1. Connect the supplied power cord to the power port on the rear panel of the Gateway (see
Figure 2 on page 15).
2. Connect the other end of the power adapter to a working power outlet. The Gateway
powers on automatically, the POWER LED on the front panel goes ON, and the other front
panel LEDs show the Gateway’s status (see Table 1 on page 14).
WARNING: Only use the power cord supplied with the Gateway. Using a different power cord
can damage the Gateway and void the warranty.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
3 Preconfiguration Guidelines
After you install your SMCD3GNV Wireless Cable Modem Gateway, use the information in
this chapter to configure the TCP/IP settings on the computer that will be used to configure
the Gateway. This chapter also covers other preconfiguration guidelines you should review
before configuring the Gateway.
The topics covered in this chapter are:
Configuring Your Computer for TCP/IP (page 25)
Disabling Proxy Settings (page 34)
Disabling Firewall and Security Software (page 35)
Confirming the Gateway’s Online Status (page 35)
Confirming Your Computer’s Link Status (page 35)
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Preconfiguration Guidelines
Configuring Your Computer for TCP/IP
Before you configure the Gateway using its Web management interface, configure TCP/IP
settings on the computer that will be used to configure the Gateway. The TCP/IP procedure
to use depends on the operating system installed on the computer.
For Microsoft Windows 2000, see the procedure below
For Microsoft Windows XP, see page 26
For Microsoft Windows Vista, see page 27
For Microsoft Windows 7, see page 30
For Apple Macintosh, see page 33
Configuring Microsoft Windows 2000
Use the following procedure to configure your computer if your computer has Microsoft
Windows 2000 installed.
1. On the Windows taskbar, click Start, point to Settings, and then click Control Panel.
2. In the Control Panel window, double-click the Network and Dial-up Connections icon. If
the Ethernet adapter in your computer is installed correctly, the Local Area Connection
icon appears.
3. Double-click the Local Area Connection icon for the Ethernet adapter connected to the
Gateway. The Local Area Connection Status dialog box appears (see Figure 8).
Figure 8. Local Area Connection Status Window
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Preconfiguration Guidelines
4. In the Local Area Connection Status dialog box, click the Properties button. The Local
Area Connection Properties dialog box appears.
5. In the Local Area Connection Properties dialog box, verify that Internet Protocol (TCP/IP)
is checked. Then select Internet Protocol (TCP/IP) and click the Properties button.
6. Click Obtain an IP address automatically to configure your computer for DHCP.
7. Click the OK button to save this change and close the Local Area Connection Properties
dialog box.
8. Click OK button again to save these new changes.
9. Restart your computer.
Configuring Microsoft Windows XP
Use the following procedure to configure your computer if your computer has Microsoft
Windows XP installed. If you use the Classic interface, where the icons and menus resemble
previous Windows versions, perform the procedure under “Configuring Microsoft Windows
2000” on page 25.
1. On the Windows taskbar, click Start, click Control Panel, and then click Network and
Internet Connections.
2. Click the Network Connections icon.
3. Click Local Area Connection for the Ethernet adapter connected to the Gateway. The
Local Area Connection Status dialog box appears.
4. In the Local Area Connection Status dialog box, click the Properties button (see Figure 9).
The Local Area Connection Properties dialog box appears.
Figure 9. Local Area Connection Status Window
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Preconfiguration Guidelines
5. In the Local Area Connection Properties dialog box, verify that Internet Protocol (TCP/IP)
is checked. Then select Internet Protocol (TCP/IP) and click the Properties button. The
Internet Protocol (TCP/IP) Properties dialog box appears.
6. In the Internet Protocol (TCP/IP) Properties dialog box, click Obtain an IP address
automatically to configure your computer for DHCP. Click the OK button to save this
change and close the Internet Protocol (TCP/IP) Properties dialog box.
7. Click the OK button again to save your changes.
8. Restart your computer.
Configuring Microsoft Windows Vista
Use the following procedure to configure a computer running Microsoft Windows Vista with
the default interface. If you use the Classic interface, where the icons and menus resemble
previous Windows versions, perform the procedure under “Configuring Microsoft Windows
2000” on page 25.
1. On the Windows taskbar, click Start, click Control Panel, and then select Network and
Internet Icon.
2. Click View Networks Status and tasks and then click Management Networks
Connections.
3. Right-click the Local Area Connection icon and click Properties.
4. Click Continue. The Local Area Connection Properties dialog box appears.
5. In the Local Area Connection Properties dialog box, verify that Internet Protocol
(TCP/IPv4) is checked. Then select Internet Protocol (TCP/IPv4) and click the
Properties button (see Figure 10). The Internet Protocol Version 4 Properties dialog box
appears.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Preconfiguration Guidelines
Figure 10. Local Area Connection Properties Window
6. In the Internet Protocol Version 4 Properties dialog box, click Obtain an IP address
automatically to configure your computer for DHCP (see Figure 11).
Figure 11. Internet Protocol Properties Window
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Preconfiguration Guidelines
7. Click the OK button to save your changes and close the dialog box.
8. Click the OK button again to save your changes.
Figure 12. Local Area Connection Status Window
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SMCD3GNV Wireless Cable Modem Gateway User Manual
Preconfiguration Guidelines
Configuring Microsoft Windows 7
Use the following procedure to configure a computer running Microsoft Windows 7.
1. In the Start menu search box, type: ncpa.cpl
Figure 13. Typing ncpa.cpl in the Start Menu Box
The Network Connections List appears.
Figure 14. Example of Network Connections List
2. Right-click the Local Area Connection icon and click Properties.
3. In the Networking tab, click either Internet Protocol Version 4 (TCP/IPv4) or Internet
Protocol Version 6 (TCP/IPv6), and then click Properties.
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SMCD3GNV Wireless Cable Modem Gateway User Manual
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