Netgear WGR614v6 Reference Manual
Publicité
Publicité
Reference Manual for the
54 Mbps Wireless Router
WGR614 v6
NETGEAR, Inc.
4500 Great America Parkway
Santa Clara, CA 95054 USA
202-10099-01
April 2005
202-10099-01, April 2005
© 2005 by NETGEAR, Inc. All rights reserved. April 2005.
Trademarks
NETGEAR is a trademark of Netgear, Inc.
Microsoft, Windows, and Windows NT are registered trademarks of Microsoft Corporation.
Other brand and product names are registered trademarks or trademarks of their respective holders.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, NETGEAR reserves the right to make changes to the products described in this document without notice.
NETGEAR does not assume any liability that may occur due to the use or application of the product(s) or circuit layout(s) described herein.
Federal Communications Commission (FCC) Compliance Notice: Radio Frequency Notice
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
EN 55 022 Declaration of Conformance
This is to certify that the 54 Mbps Wireless Router WGR614 v6 is shielded against the generation of radio interference in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is declared by the application of EN 55 022 Class B (CISPR 22).
Bestätigung des Herstellers/Importeurs
Es wird hiermit bestätigt, daß das 54 Mbps Wireless Router WGR614 v6 gemäß der im BMPT-AmtsblVfg 243/1991 und
Vfg 46/1992 aufgeführten Bestimmungen entstört ist. Das vorschriftsmäßige Betreiben einiger Geräte (z.B. Testsender) kann jedoch gewissen Beschränkungen unterliegen. Lesen Sie dazu bitte die Anmerkungen in der Betriebsanleitung.
Das Bundesamt für Zulassungen in der Telekommunikation wurde davon unterrichtet, daß dieses Gerät auf den Markt gebracht wurde und es ist berechtigt, die Serie auf die Erfüllung der Vorschriften hin zu überprüfen.
Certificate of the Manufacturer/Importer
It is hereby certified that the 54 Mbps Wireless Router WGR614 v6 has been suppressed in accordance with the conditions set out in the BMPT-AmtsblVfg 243/1991 and Vfg 46/1992. The operation of some equipment (for example, test transmitters) in accordance with the regulations may, however, be subject to certain restrictions. Please refer to the notes in the operating instructions.
Federal Office for Telecommunications Approvals has been notified of the placing of this equipment on the market and has been granted the right to test the series for compliance with the regulations. ii
202-10099-01, April 2005
Voluntary Control Council for Interference (VCCI) Statement
This equipment is in the second category (information equipment to be used in a residential area or an adjacent area thereto) and conforms to the standards set by the Voluntary Control Council for Interference by Data Processing
Equipment and Electronic Office Machines aimed at preventing radio interference in such residential areas.
When used near a radio or TV receiver, it may become the cause of radio interference.
Read instructions for correct handling.
Customer Support
Refer to the Support Information Card that shipped with your 54 Mbps Wireless Router WGR614 v6.
World Wide Web
NETGEAR maintains a World Wide Web home page that you can access at the universal resource locator (URL)
http://www.netgear.com. A direct connection to the Internet and a Web browser such as Internet Explorer or Netscape are required.
Product and Publication Details
Model Number:
Publication Date:
Product Family:
Product Name:
Home or Business Product:
Language:
Publication Part Number:
WGR614 v6
April 2005 router
54 Mbps Wireless Router WGR614 v6
Home
English
202-10099-01
202-10099-01, April 2005 iii
iv
202-10099-01, April 2005
Contents
Autosensing Ethernet Connections with Auto Uplink ...............................................2-3
Configuring the Internet and Wireless Settings
NETGEAR Product Registration, Support, and Documentation ...................................3-12
Contents
202-10099-01, April 2005 v
Configuring Services Blocking by IP Address Range ..............................................4-5
Advanced Configuration of the Router
Multiple Computers for Half Life, KALI or Quake III Example ..................................6-6
vi Contents
202-10099-01, April 2005
Testing the Path from Your Computer to a Remote Device .....................................7-6
Network, Routing, Firewall, and Basics
MAC Addresses and Address Resolution Protocol ................................................. B-8
Contents
202-10099-01, April 2005 vii
Uplink Switches, Crossover Cables, and MDI/MDIX Switching ............................ B-14
What You Need To Use a Router with a Broadband Modem ......................................... C-1
Computer Network Configuration Requirements .................................................... C-1
Where Do I Get the Internet Configuration Parameters? ........................................ C-2
Configuring Windows 95, 98, and Me for TCP/IP Networking ....................................... C-4
Enabling DHCP to Automatically Configure TCP/IP Settings in Windows 95B, 98, and Me
DHCP Configuration of TCP/IP in Windows XP, 2000, or NT4 ............................. C-10
DHCP Configuration of TCP/IP in Windows XP ................................................... C-10
DHCP Configuration of TCP/IP in Windows 2000 ................................................ C-12
DHCP Configuration of TCP/IP in Windows NT4 .................................................. C-15
Verifying TCP/IP Properties for Windows XP, 2000, and NT4 .............................. C-17
Verifying TCP/IP Properties for Macintosh Computers ......................................... C-19
viii Contents
202-10099-01, April 2005
Obtaining ISP Configuration Information for Windows Computers ....................... C-21
Obtaining ISP Configuration Information for Macintosh Computers ..................... C-22
Network Name: Extended Service Set Identification (ESSID) ................................ D-2
How Does WPA Compare to WPA2 (IEEE 802.11i)? ............................................ D-10
What are the Key Features of WPA and WPA2 Security? .................................... D-10
WPA/WPA2 Authentication: Enterprise-level User
Authentication via 802.1x/EAP and RADIUS .................................................. D-12
WPA/WPA2 Data Encryption Key Management ............................................. D-14
Supporting a Mixture of WPA, WPA2, and WEP Wireless Clients is Discouraged D-16
Changes to Wireless Network Adapters ......................................................... D-17
Contents ix
202-10099-01, April 2005
x
202-10099-01, April 2005
Contents
Chapter 1
About This Manual
This chapter describes the intended audience, scope, conventions, and formats of this manual.
Audience, Scope, Conventions, and Formats
This reference manual assumes that the reader has basic to intermediate computer and Internet skills. However, basic computer network, Internet, firewall, and VPN technologies tutorial information is provided in the Appendices and on the Netgear website.
This guide uses the following typographical conventions:
Table 1-1.
Typographical Conventions italics bold fixed
Emphasis, books, CDs, URL names
User input
Screen text, file and server names, extensions, commands, IP addresses
This guide uses the following formats to highlight special messages:
Note: This format is used to highlight information of importance or special interest.
This manual is written for the WGR614 v6 router according to these specifications:
Table 1-2.
Manual Scope
Product Version
Manual Publication Date
54 Mbps Wireless Router WGR614 v6
April 2005
Note: Product updates are available on the NETGEAR, Inc. Web site at http://kbserver.netgear.com/products/WGR614 v6.asp
.
About This Manual 1-1
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
How to Use This Manual
The HTML version of this manual includes the following:
• Buttons, at a time and , for browsing forwards or backwards through the manual one page
• A button that displays the table of contents and an button. Double-click on a link in the table of contents or index to navigate directly to where the topic is described in the manual.
• A product model.
button to access the full NETGEAR, Inc. online knowledge base for the
• Links to PDF versions of the full manual and individual chapters.
1-2
202-10099-01, April 2005
About This Manual
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
How to Print this Manual
To print this manual you can choose one of the following several options, according to your needs.
• Printing a Page in the HTML View.
Each page in the HTML version of the manual is dedicated to a major topic. Use the Print button on the browser toolbar to print the page contents.
• Printing a Chapter.
Use the PDF of This Chapter link at the top left of any page.
– Click the PDF of This Chapter link at the top right of any page in the chapter you want to print. The PDF version of the chapter you were viewing opens in a browser window.
Note: Your computer must have the free Adobe Acrobat reader installed in order to view and print PDF files. The Acrobat reader is available on the Adobe Web site at http://www.adobe.com
.
– Click the print icon in the upper left of the window.
Tip: If your printer supports printing two pages on a single sheet of paper, you can save paper and printer ink by selecting this feature.
• Printing the Full Manual.
Use the Complete PDF Manual link at the top left of any page.
– Click the Complete PDF Manual link at the top left of any page in the manual. The PDF version of the complete manual opens in a browser window.
– Click the print icon in the upper left of the window.
Tip: If your printer supports printing two pages on a single sheet of paper, you can save paper and printer ink by selecting this feature.
About This Manual
202-10099-01, April 2005
1-3
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
1-4
202-10099-01, April 2005
About This Manual
Chapter 2
Introduction
Congratulations on your purchase of the NETGEAR ® 54 Mbps Wireless Router WGR614 v6. The
WGR614 v6 router provides connection for multiple computers to the Internet through an external broadband access device (such as a cable modem or DSL modem) that is normally intended for use by a single computer. This chapter describes the features of the NETGEAR 54 Mbps Wireless
Router WGR614 v6.
Key Features
The 54 Mbps Wireless Router WGR614 v6 with 4-port switch connects your local area network
(LAN) to the Internet through an external access device such as a cable modem or DSL modem.
The WGR614 v6 router provides you with multiple Web content filtering options, plus browsing activity reporting and instant alerts via e-mail. Parents and network administrators can establish restricted access policies based on time-of-day, Web site addresses and address keywords, and share high-speed cable/DSL Internet access for up to 253 computers. In addition to the Network
Address Translation (NAT) feature, the built-in firewall protects you from hackers.
With minimum setup, you can install and use the router within minutes.
The WGR614 v6 router provides the following features:
• 802.11g wireless networking, with the ability to operate in 802.11 b-only, 802.11g-only, or
802.11b+g modes.
• Easy, Web-based setup for installation and management.
• Content Filtering and Site Blocking Security.
• Built in 4-port 10/100 Mbps Switch.
• Ethernet connection to a wide area network (WAN) device, such as a cable modem or DSL modem.
• Extensive Protocol Support.
• Login capability.
• Front panel LEDs for easy monitoring of status and activity.
Introduction 2-1
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Flash memory for firmware upgrades.
802.11g Wireless Networking
The WGR614 v6 router includes an 802.11g wireless access point, providing continuous, high-speed 54 Mbps access between your wireless and Ethernet devices. The access point provides:
• 802.11g wireless networking at up to 54 Mbps.
• 802.11g wireless networking, with the ability to operate in 802.11g-only, 802.11b-only, or
802.11g and b modes, providing backwards compatibility with 802.11b devices or dedicating the wireless network to the higher bandwidth 802.11g devices.
• 64-bit and 128-bit WEP encryption security.
• WEP keys can be generated manually or by passphrase.
• WPA-PSK support. Support for Wi-Fi Protected Access (WPA) data encryption which provides strong data encryption and authentication based on a pre-shared key.
• Wireless access can be restricted by MAC address.
• Wireless network name broadcast can be turned off so that only devices that have the network name (SSID) can connect.
A Powerful, True Firewall with Content Filtering
Unlike simple Internet sharing NAT routers, the WGR614 v6 is a true firewall, using stateful packet inspection to defend against hacker attacks. Its firewall features include:
• Denial of Service (DoS) protection.
Automatically detects and thwarts DoS attacks such as Ping of Death, SYN Flood, LAND
Attack, and IP Spoofing.
• Blocks unwanted traffic from the Internet to your LAN.
• Blocks access from your LAN to Internet locations or services that you specify as off-limits.
• Logs security incidents.
The WGR614 v6 will log security events such as blocked incoming traffic, port scans, attacks, and administrator logins. You can configure the router to E-mail the log to you at specified intervals. You can also configure the router to send immediate alert messages to your E-mail address or E-mail pager whenever a significant event occurs.
2-2 Introduction
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• The WGR614 v6 prevents objectionable content from reaching your computers. The router allows you to control access to Internet content by screening for keywords within Web addresses. You can configure the router to log and report attempts to access objectionable
Internet sites.
Security
The WGR614 v6 router is equipped with several features designed to maintain security, as described in this section.
• Computers Hidden by NAT
NAT opens a temporary path to the Internet for requests originating from the local network.
Requests originating from outside the LAN are discarded, preventing users outside the LAN from finding and directly accessing the computers on the LAN.
• Port Forwarding with NAT
Although NAT prevents Internet locations from directly accessing the computers on the LAN, the router allows you to direct incoming traffic to specific computers based on the service port number of the incoming request, or to one designated “DMZ” host computer. You can specify forwarding of single ports or ranges of ports.
Autosensing Ethernet Connections with Auto Uplink
With its internal 4-port 10/100 switch, the WGR614 v6 can connect to either a 10 Mbps standard
Ethernet network or a 100 Mbps Fast Ethernet network. Both the LAN and WAN interfaces are autosensing and capable of full-duplex or half-duplex operation.
The router incorporates Auto Uplink TM technology. Each Ethernet port will automatically sense whether the Ethernet cable plugged into the port should have a ‘normal’ connection such as to a computer or an ‘uplink’ connection such as to a switch or hub. That port will then configure itself to the correct configuration. This feature also eliminates the need to worry about crossover cables, as Auto Uplink will accommodate either type of cable to make the right connection.
Extensive Protocol Support
The WGR614 v6 router supports the Transmission Control Protocol/Internet Protocol
(TCP/IP) and Routing Information Protocol (RIP). For further information about TCP/IP, refer to
Appendix B, “Network, Routing, Firewall, and Basics
.”
Introduction 2-3
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• IP Address Sharing by NAT
The WGR614 v6 router allows several networked computers to share an Internet account using only a single IP address, which may be statically or dynamically assigned by your
Internet service provider (ISP). This technique, known as NAT, allows the use of an inexpensive single-user ISP account.
• Automatic Configuration of Attached computers by DHCP
The WGR614 v6 router dynamically assigns network configuration information, including
IP, gateway, and domain name server (DNS) addresses, to attached computers on the LAN using the Dynamic Host Configuration Protocol (DHCP). This feature greatly simplifies configuration of computers on your local network.
• DNS Proxy
When DHCP is enabled and no DNS addresses are specified, the router provides its own address as a DNS server to the attached computers. The router obtains actual DNS addresses from the ISP during connection setup and forwards DNS requests from the LAN.
• PPP over Ethernet (PPPoE)
PPPoE is a protocol for connecting remote hosts to the Internet over a DSL connection by simulating a dial-up connection. This feature eliminates the need to run a login program such as Entersys or WinPOET on your computer.
Easy Installation and Management
You can install, configure, and operate the 54 Mbps Wireless Router WGR614 v6 within minutes after connecting it to the network. The following features simplify installation and management tasks:
• Browser-based management
Browser-based configuration allows you to easily configure your router from almost any type of personal computer, such as Windows, Macintosh, or Linux. A user-friendly Setup Wizard is provided and online help documentation is built into the browser-based Web Management
Interface.
• Smart Wizard
The WGR614 v6 router Smart Wizard automatically senses the type of Internet connection, asking you only for the information required for your type of ISP account.
• Firmware Update
The WGR614 v6 router can be updated if a newer version of firmware is available. This lets you take advantage of product enhancements for your WGR614 v6 as soon as they become available.
2-4 Introduction
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Visual monitoring
The WGR614 v6 router’s front panel LEDs provide an easy way to monitor its status and activity.
Maintenance and Support
NETGEAR offers the following features to help you maximize your use of the WGR614 v6 router:
• Flash memory for firmware upgrades.
• Free technical support seven days a week, twenty-four hours a day, for 90 days from the date of purchase.
Package Contents
The product package should contain the following items:
• 54 Mbps Wireless Router WGR614 v6.
• AC power adapter.
• Vertical stand.
• Category 5 (CAT5) Ethernet cable.
• NETGEAR 54 Mbps Wireless Router WGR614 v6 Resource CD (230-10091-02), including:
— This guide.
— The Installation Guide.
— Application Notes and other helpful information.
• 54 Mbps Wireless Router WGR614 v5 Installation Guide.
• Registration, Warranty Card, and Support Information Card.
If any of the parts are incorrect, missing, or damaged, contact your NETGEAR dealer. Keep the carton, including the original packing materials, in case you need to return the router for repair.
Introduction 2-5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
The Router’s Front Panel
The front panel of the WGR614 v6 router contains the status lights described below.
0OWER 4EST 7IRELESS
Figure 2-1: WGR614 v6 Front Panel
)NTERNET ,!.
You can use the status lights to verify connections. Viewed from left to right, the table below describes the lights on the front panel of the router.
Table 2-1.
Status Light Descriptions
Label Activity
Power On Amber Blinking
On Green Solid
Off
Solid Amber
Test On
Off
Wireless On
Off
Internet On
Blink
LAN On (Green)
Blink (Green)
On (Amber)
Blink (Amber)
Off
Description
Power is supplied to the router and it is performing its diagnostic test.
Power is supplied and the router it has passed its diagnostic test.
Power is not supplied to the router.
The router has failed its diagnostic test.
The unit is performing the power on self test diagnostic.
The unit successfully completed the power on self test diagnostic.
The Wireless port is initialized and the wireless feature is enabled.
The wireless feature is turned off or there is a problem.
The Internet port has detected a link with an attached device.
Data is being transmitted or received by the Internet port.
The LAN (local area network) port has detected link with a 100 Mbps device.
Data is being transmitted or received at 100 Mbps.
The Local port has detected link with a 10 Mbps device.
Data is being transmitted or received at 10 Mbps.
No link is detected on this port.
2-6 Introduction
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
The Router’s Rear Panel
The rear panel of the WGR614 v6 router contains the items listed below.
Wireless
Antenna
4 3 2 1
Reset
Button
Power 4 LAN Ports
Figure 1-2: WGR614 v6 Rear Panel
Internet Port
Viewed from left to right, the rear panel contains the following features:
• AC power adapter outlet for
12 V DC @ 1A output, 22W maximum
• Four Local (LAN) 10/100 Mbps Ethernet ports for connecting the router to the local computers
• Internet (WAN) Ethernet port for connecting the router to a cable or DSL modem
• Factory Default Reset push button for
Restoring the Default Configuration and Password
• Wireless antenna
Introduction
202-10099-01, April 2005
2-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
2-8
202-10099-01, April 2005
Introduction
Chapter 3
Configuring the Internet and Wireless Settings
This chapter describes how to use the Smart Wizard Installation Assistant on the Resource CD to configure your wireless router’s Internet connection and wireless parameters.
Once you are connected to the Internet and your wireless connections are working, you can also configure the router’s content filtering parameters if you need to change the default settings. See
.
If you are an advanced user, you can also configure maintenance (see Chapter 5, “Maintenance
) and advanced (see
Chapter 6, “Advanced Configuration of the Router
) settings if you need to change the factory defaults.
Note: Do not change your existing Internet connection. Instead, let the Smart Wizard
Installation Assistant on the Resource CD guide you through the setup process.
Configuring the Internet and Wireless Settings
202-10099-01, April 2005
3-1
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Initial Configuration
1.
Insert the Resource CD into the CD drive on your PC. The following screen appears:
Click SETUP to get started
Figure 3-1: Smart Wizard Installation Assistant Startup screen
2.
Click Setup and follow the instructions. The Smart Wizard Installation Assistant will guide you through the setup process:
• How to change your cabling.
• How to connect to the Internet.
• How to configure your wireless settings.
– When you get to the wireless settings, you will have to select the country where you are located and decide whether you want to have security on your wireless links
(Netgear strongly recommends enabling security).
– Depending on the type of security you select, you will also have to enter security key or passphrase information (see
“Wireless Settings” on page 3-9
for information on the wireless authentication and encryption parameters).
3-2 Configuring the Internet and Wireless Settings
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
If you want to change your Internet or wireless settings later, see
Logging Into Your Router
To log into your router after you have configured your router, do the following:
1.
Type http://www.routerlogin.net
in the address field of Internet Explorer or Netscape®
Navigator.
Figure 3-2: Log in to the router
2.
When prompted, enter admin
for the router user name and password for the router password, both in lower case letters (or enter the password you chose if you changed it during the setup in
“Initial Configuration” on page 3-2
).
Note: The router user name and password are not the same as any user name or password you may use to log in to your Internet connection.
A login window like the one shown below opens:
Figure 3-3: Login window
Configuring the Internet and Wireless Settings
202-10099-01, April 2005
3-3
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
3.
Click OK and the resulting window below appears:
Figure 3-4: Login result
3-4 Configuring the Internet and Wireless Settings
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Changing Your Configuration
You can change your Internet and wireless settings after they have been configured by the Smart
Wizard Configuration Assistant.
Internet Settings
To change the Internet settings, click Basic Settings on the left menu bar. One of the following screens appears:
Basic Settings, No Login Basic Settings, Login Required
Figure 3-5: Basic Settings screens
The Basic Settings pages allow you to configure, upgrade and check the status of your NETGEAR
Wireless Router.
Configuring the Internet and Wireless Settings
202-10099-01, April 2005
3-5
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Click an item in the leftmost column. The current settings or information for that area appear in the center column.
Helpful information related to the selected Settings page appears in this column. If you are using
Internet Explorer, you may click an item in the center column to jump directly to the related help section; otherwise, scroll down until you reach it.
For the most current documentation, go to: http://kbserver.netgear.com/products_automatic/WGR614v6.asp
Note: If you are setting up the router for the first time, the default settings may work for you with no changes.
• Does Your Internet Connection Require A Login?: Select this option based on the type of account you have with your ISP. If you need to enter login information every time you connect to the Internet or you have a PPPoE account with your ISP, select Yes. Otherwise, select No.
Note: If you have installed PPP software such as WinPoET (from Earthlink) or Enternet (from
PacBell), then you have PPPoE. Select Yes. After selecting Yes and configuring your router, you will not need to run the PPP software on your PC to connect to the Internet.
• Internet Service Provider: Select the service provided by your ISP. "Other" (PPPoE) is the most common. "PPTP" is used in Austria and other European countries. "Telstra BigPond" is for Australia only.
– Login: This is usually the name that you use in your e-mail address. For example, if your main mail account is [email protected], then put JerAB in this box.
Some ISPs (like Mindspring, Earthlink, and T-DSL) require that you use your full e-mail address when you log in. If your ISP requires your full e-mail address, then type it in the
Login box.
– Password: Type the password that you use to log in to your ISP.
– Service Name: If your ISP provided a Service Name, enter it here. Otherwise, this may be left blank.
– Idle Timeout: An idle Internet connection will be terminated after this time period.
If this value is zero (0), then the connection will be "kept alive" by re-connecting immediately whenever the connection is lost.
• Internet IP Address: If you log in to your service or your ISP did not provide you with a fixed IP address, the router will find an IP address for you automatically when you connect.
Select Get dynamically from ISP.
3-6 Configuring the Internet and Wireless Settings
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
If you have a fixed (static, permanent) IP address, your ISP will have provided you with an IP address. Select Use static IP address and type in the IP Address.
• Account Name (also known as Host Name or System Name): For most users, type your account name or user name in this box. For example, if your main mail account is
[email protected], then put JerAB in this box.
If your ISP has given you a specific Host name, then type it (for example, CCA7324-A).
• Domain Name: For most users, you may leave this box blank, unless required by your ISP.
You may type the domain name of your ISP. For example, if your ISP's mail server is mail.xxx.yyy.zzz, you would type xxx.yyy.zzz as the Domain Name.
If you have a Domain name given to you by your ISP, type it in this box. (For example,
Earthlink Cable may require a Host name of 'home' and Comcast sometimes supplies a
Domain name.)
If you have a cable modem, this is usually the Workgroup name.
• Internet IP Address: If you log in to your service or your ISP did not provide you with a fixed IP address, the router will find an IP address for you automatically when you connect.
Select Get Dynamically From ISP.
If you have a fixed (or static IP) address, your ISP will have provided you with the required information. Select Use Static IP Address and type the IP Address, Subnet Mask and Gateway
IP Address into the correct boxes.
For example:
IP Address: 24.218.156.183
Subnet Mask: 255.255.255.0
Gateway IP Address: 24.218.156.1
• Domain Name Server (DNS) Address: The DNS server is used to look up site addresses based on their names.
If your ISP gave you one or two DNS addresses, select Use These DNS Servers and type the primary and secondary addresses.
Otherwise, select Get Automatically From ISP.
Note: If you get 'Address not found' errors when you go to a Web site, it is likely that your
DNS servers aren't set up properly. You should contact your ISP to get DNS server addresses.
• Router MAC Address: Your computer's local address is its unique address on your network.
This is also referred to as the computer's MAC (Media Access Control) address.
Configuring the Internet and Wireless Settings
202-10099-01, April 2005
3-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Usually, select Use Default MAC Address.
If your ISP requires MAC authentication, then select either Use Computer MAC address to disguise the Router's MAC address with the Computer's own MAC address or Use This MAC
Address to manually type the MAC address for a different computer. The format for the MAC address is XX:XX:XX:XX:XX:XX. This value may be changed if the Use Computer MAC
Address is selected once a value has already been set in the Use This MAC Address selection.
Click Test to connect to the NETGEAR Web site. If you connect successfully, your settings work and you may click Logout to exit these pages and... enjoy surfing the 'net!
If you don't connect successfully,
1.
2.
Go through the settings and make sure you've selected the correct options and typed everything correctly.
Contact your ISP to verify the configuration information.
3.
4.
5.
Read the Troubleshooting section in the Router Installation Guide.
On the Router GearBox CD, read the Troubleshooting Guide or the Troubleshooting section in the Reference Manual.
Contact NETGEAR Technical Support.
3-8 Configuring the Internet and Wireless Settings
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Wireless Settings
To change the Internet settings, click Wireless Settings on the left menu bar. One of the following screens appears:
Wireless Settings:
No security
Wireless Settings:
WEP security
Wireless Settings:
WPA-PSK security
Figure 3-6: Wireless Settings screens
NOTE: To ensure proper agency compliance and compatibility between similar products in your area; the operating channel & region must be set correctly.
• Placement of the Router to Optimize Wireless Connectivity: The operating distance or range of your wireless connection can vary significantly based on the physical placement of the router. For best results, place your router:
– Near the center of the area in which your PCs will operate
– In an elevated location such as a high shelf
– Away from potential sources of interference, such as PCs, microwaves, and cordless phones
– With the Antenna tight and in the upright position
– Away from large metal surfaces
Configuring the Internet and Wireless Settings
202-10099-01, April 2005
3-9
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Note: Failure to follow these guidelines can result in significant performance degradation or inability to wirelessly connect to the router.
• Name (SSID): Enter a value of up to 32 alphanumeric characters. The same Name (SSID) must be assigned to all wireless devices in your network. The default SSID is NETGEAR, but
NETGEAR strongly recommends that you change your network's Name (SSID) to a different value. This value is also case-sensitive. For example, NETGEAR is not the same as
NETGEAr.
• Region: Select your region from the drop-down list. This field displays the region of operation for which the wireless interface is intended. It may not be legal to operate the router in a region other than the region shown here. If your country or region is not listed, please check with your local government agency or check our web site for more information on which channels to use.
• Channel: This field determines which operating frequency will be used. It should not be necessary to change the wireless channel unless you notice interference problems with another nearby access point.
• Mode: Select the desired wireless mode. The options are:
– g & b: Both 802.11g and 802.11b wireless stations can be used.
– g only: Only 802.11g wireless stations can be used.
– b only: All 802.11b wireless stations can be used. 802.11g wireless stations can still be used if they can operate in 802.11b mode.
The default is "g & b", which allows both "g" and "b" wireless stations to access this device.
• Security Options
– Disable: no data encryption
– WEP (Wired Equivalent Privacy): use WEP 64 or 128 bit data encryption
• Authentication Type: Normally this can be left at the default value of "Automatic." If that fails, select the appropriate value - "Open System" or "Shared Key" Check your wireless card's documentation to see what method to use.
• Encryption Strength: Select the WEP Encryption level:
64-bit (sometimes called 40-bit) encryption
128-bit encryption
• Security Encryption (WEP) Key: If WEP is enabled, you can manually or automatically program the four data encryption keys. These values must be identical on all PCs and Access Points in your network.
3-10 Configuring the Internet and Wireless Settings
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Automatic Key Generation (Passphrase): Enter a word or group of printable characters in the Passphrase box and click the Generate button to automatically configure the WEP Key(s). If encryption strength is set to 64 bit, then each of the four key boxes will automatically be populated with key values. If encryption strength is set to 128 bit, then only the selected WEP key box will automatically be populated with key values.
• Manual Entry Mode: Select which of the four keys will be used and enter the matching WEP key information for your network in the selected key box.
For 64 bit WEP: Enter ten hexadecimal digits (any combination of 0-9, A-F).
For 128 bit WEP: Enter twenty-six hexadecimal digits (any combination of 0-9, A-F).
– WPA-PSK (Wi-Fi Protected Access Pre-Shared Key): use WPA-PSK standard encryption
• Security Encryption (WPA-PSK): Enter a word or group of printable characters in the Passphrase box. The Passphrase must be 8 to 63 characters in length.
Default Factory Settings
When you first receive your WGR614 v6, the default factory settings are shown below. You can restore these defaults with the Factory Default Restore button on the rear panel. After you install the WGR614 v6 router, use the procedures below to customize any of the settings to better meet your networking needs.
FEATURE
Wireless Access Point
Wireless Access List (MAC Filtering)
SSID broadcast
SSID
11b/g RF Channel
Mode
Authentication Type
WEP
DEFAULT FACTORY SETTINGS
Enabled
All wireless stations allowed
Enabled
NETGEAR
11 g and b
Open System
Disabled
Configuring the Internet and Wireless Settings
202-10099-01, April 2005
3-11
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
How to Bypass the Configuration Assistant
1.
2.
When the wireless router is in the factory default state, type
http://www.routerlogin.net/basicsetting.htm in the address field of your browser, then click
Enter.
When the wireless router is in the factory default state, a user name and password are not required.
The browser will then display the WGR614 v6 settings home page shown in
If you do not click Logout, the wireless router will wait 5 minutes after there is no activity before it automatically logs you out.
NETGEAR Product Registration, Support, and Documentation
Register your product at http://www.NETGEAR.com/register . Registration is required before you can use our telephone support service.
Product updates and Web support are always available by going to: http://kbserver.netgear.com/products/WGR614v6.asp
.
Documentation is available on the CD and at http://kbserver.netgear.com/documentation/WGR614v6.asp
.
When the wireless router is connected to the Internet, click the Knowledge Base or the
Documentation link under the Web Support menu to view support information or the documentation for the wireless router.
3-12 Configuring the Internet and Wireless Settings
202-10099-01, April 2005
Chapter 4
Content Filtering
This chapter describes how to use the content filtering features of the 54 Mbps Wireless Router
WGR614 v6 to protect your network. These features can be found by clicking on the Content
Filtering heading in the Main Menu of the browser interface.
Content Filtering Overview
The 54 Mbps Wireless Router WGR614 v6 provides you with Web content filtering options, plus browsing activity reporting and instant alerts via e-mail. Parents and network administrators can establish restricted access policies based on time of day, Web addresses and Web address keywords. You can also block Internet access by applications and services, such as chat or games.
To configure these features of your router, click on the subheadings under the Content Filtering heading in the Main Menu of the browser interface. The subheadings are described below:
Content Filtering
202-10099-01, April 2005
4-1
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Blocking Access to Internet Sites
The WGR614 v6 router allows you to restrict access based on Web addresses and Web address keywords. Up to 255 entries are supported in the Keyword list. The Block Sites menu is shown in
below:
Figure 4-1: Block Sites menu
To enable keyword blocking, select either “Per Schedule” or “Always”, then click Apply. If you want to block by schedule, be sure that a time period is specified in the Schedule menu.
To add a keyword or domain, type it in the Keyword box, click Add Keyword, then click Apply.
To delete a keyword or domain, select it from the list, click Delete Keyword, then click Apply.
Keyword application examples:
• If the keyword “XXX” is specified, the URL <http://www.badstuff.com/xxx.html> is blocked.
4-2 Content Filtering
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• If the keyword “.com” is specified, only Web sites with other domain suffixes (such as .edu or
.gov) can be viewed.
• If you wish to block all Internet browsing access during a scheduled period, enter the keyword
“.” and set the schedule in the Schedule menu.
To specify a Trusted User, enter that PC’s IP address in the Trusted User box and click Apply.
You may specify one Trusted User, which is a PC that will be exempt from blocking and logging. Since the Trusted User will be identified by an IP address, you should configure that
PC with a fixed IP address.
Blocking Access to Internet Services
The WGR614 v6 router allows you to block the use of certain Internet services by PCs on your network. This is called services blocking or port filtering. The Block Services menu is shown below:
Figure 4-2: Block Services menu
Services are functions performed by server computers at the request of client computers. For example, Web servers serve Web pages, time servers serve time and date information, and game hosts serve data about other players’ moves. When a computer on your network sends a request for service to a server computer on the Internet, the requested service is identified by a service or port number. This number appears as the destination port number in the transmitted IP packets. For example, a packet that is sent with destination port number 80 is an HTTP (Web server) request.
To enable service blocking, select either Per Schedule or Always, then click Apply. If you want to block by schedule, be sure that a time period is specified in the Schedule menu.
Content Filtering 4-3
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
To specify a service for blocking, click Add. The Add Services menu will appear, as shown below:
Figure 4-3: Add Services menu
From the Service Type list, select the application or service to be allowed or blocked. The list already displays several common services, but you are not limited to these choices. To add any additional services or applications that do not already appear, select User Defined.
Configuring a User Defined Service
To define a service, first you must determine which port number or range of numbers is used by the application. The service numbers for many common protocols are defined by the Internet
Engineering Task Force (IETF) and published in RFC1700, “Assigned Numbers.” Service numbers for other applications are typically chosen from the range 1024 to 65535 by the authors of the application. This information can usually be determined by contacting the publisher of the application or from user groups of newsgroups.
Enter the Starting Port and Ending Port numbers. If the application uses a single port number, enter that number in both boxes.
If you know that the application uses either TCP or UDP, select the appropriate protocol. If you are not sure, select Both.
4-4 Content Filtering
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Configuring Services Blocking by IP Address Range
Under “Filter Services For”, you can block the specified service for a single computer, a range of computers (having consecutive IP addresses), or all computers on your network.
Scheduling When Blocking Will Be Enforced
The WGR614 v6 router allows you to specify when blocking will be enforced. The Schedule menu is shown below:
Figure 4-4: Schedule menu
• Use this schedule for blocking content. Check this box if you wish to enable a schedule for
Content Filtering. Click Apply.
• Days to Block. Select days to block by checking the appropriate boxes. Select Everyday to check the boxes for all days. Click Apply.
• Time of Day to Block. Select a start and end time in 23:59 format. Select All day for 24 hour blocking. Click Apply.
Be sure to select your Time Zone in the E-Mail menu.
Content Filtering 4-5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Viewing Logs of Web Access or Attempted Web Access
The log is a detailed record of what Web sites you have accessed or attempted to access. Up to 128 entries are stored in the log. Log entries will only appear when keyword blocking is enabled, and no log entries will be made for the Trusted User. An example is shown below:
Figure 4-5: Logs menu
Log entries are described in Table 4-1
Table 4-1.
Field
Number
Date and Time
Source IP
Action
Log entry descriptions
Description
The index number of the content filter log entries. 128 entries are available numbered from 0 to 127. The log will keep the record of the latest 128 entries.
The date and time the log entry was recorded.
The IP address of the initiating device for this log entry.
This field displays whether the access was blocked or allowed.
The name or IP address of the Web site or newsgroup visited or attempted to access.
4-6 Content Filtering
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Log action buttons are described in Table 4-2
Table 4-2.
Field
Refresh
Clear Log
Send Log
Log action buttons
Description
Click this button to refresh the log screen.
Click this button to clear the log entries.
Click this button to E-mail the log immediately.
Configuring E-Mail Alert and Web Access Log Notifications
In order to receive logs and alerts by E-mail, you must provide your E-mail information in the
E-Mail menu, shown below:
Figure 4-6: Email menu
Content Filtering
202-10099-01, April 2005
4-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Turn e-mail notification on
Check this box if you wish to receive e-mail logs and alerts from the router.
• Your outgoing mail server
Enter the name of your ISP’s outgoing (SMTP) mail server (such as mail.myISP.com). You may be able to find this information in the configuration menu of your e-mail program. If you leave this box blank, log and alert messages will not be sent via e-mail.
• Send to this e-mail address
Enter the e-mail address to which logs and alerts are sent. This e-mail address will also be used as the From address. If you leave this box blank, log and alert messages will not be sent via e-mail.
You can specify that logs are automatically sent to the specified e-mail address with these options:
• Send alert immediately
Check this box if you would like immediate notification of attempted access to a blocked site.
• Send logs according to this schedule
Specifies how often to send the logs: Hourly, Daily, Weekly, or When Full.
– Day for sending log
Specifies which day of the week to send the log. Relevant when the log is sent weekly or daily.
– Time for sending log
Specifies the time of day to send the log. Relevant when the log is sent daily or weekly.
If the Weekly, Daily or Hourly option is selected and the log fills up before the specified period, the log is automatically e-mailed to the specified e-mail address. After the log is sent, the log is cleared from the router’s memory. If the router cannot e-mail the log file, the log buffer may fill up. In this case, the router overwrites the log and discards its contents.
The WGR614 v6 router uses the Network Time Protocol (NTP) to obtain the current time and date from one of several Network Time Servers on the Internet. In order to localize the time for your log entries, you must specify your Time Zone:
• Time Zone
Select your local time zone. This setting will be used for the blocking schedule and for time-stamping log entries.
• Daylight Savings Time
Check this box if your time zone is currently under daylight savings time.
4-8 Content Filtering
202-10099-01, April 2005
Chapter 5
Maintenance
This chapter describes how to use the maintenance features of your 54 Mbps Wireless Router
WGR614 v6. These features can be found by clicking on the Maintenance heading in the Main
Menu of the browser interface.
Viewing Wireless Router Status Information
The Router Status menu provides status and usage information. From the Main Menu of the browser interface, click on Maintenance, then select Router Status to view the System Status screen, shown below.
Figure 5-1: Router Status screen
Maintenance
202-10099-01, April 2005
5-1
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
This screen shows the following parameters:
Table 5-1.
Wireless Router Status Fields
Field Description
Account Name
Firmware Version
Internet Port
MAC Address
IP Address
DHCP
IP Subnet Mask
DNS
LAN Port
MAC Address
IP Address
IP Subnet Mask
DHCP
This field displays the Host Name assigned to the router.
This field displays the router firmware version.
These parameters apply to the Internet (WAN) port of the router.
This field displays the Media Access Control address being used by the
Internet (WAN) port of the router.
This field displays the IP address being used by the Internet (WAN) port of the router. If no address is shown, the router cannot connect to the
Internet.
If set to None, the router is configured to use a fixed IP address on the
WAN.
If set to Client, the router is configured to obtain an IP address dynamically from the ISP.
This field displays the IP Subnet Mask being used by the Internet (WAN) port of the router.
This field displays the Domain Name Server addresses being used by the router.
These parameters apply to the Local (LAN) port of the router.
This field displays the Media Access Control address being used by the
LAN port of the router.
This field displays the IP address being used by the Local (LAN) port of the router. The default is 192.168.1.1
This field displays the IP Subnet Mask being used by the Local (LAN) port of the router. The default is 255.255.255.0
Identifies if the router’s built-in DHCP server is active for the LAN attached devices.
5-2
202-10099-01, April 2005
Maintenance
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Table 5-1.
Wireless Router Status Fields (continued)
Field Description
Wireless Port
MAC Address
Name (SSID)
Region
Channel
These parameters apply to the Wireless port of the router.
This field displays the Media Access Control address being used by the
Wireless port of the router.
This field displays the wireless network name (SSID) being used by the wireless port of the router. The default is NETGEAR.
This field displays the geographic region where the router being used. It may be illegal to use the wireless features of the router in some parts of the world.
Identifies the channel of the wireless port being used. See
Channels” on page D-7 for the frequencies used on each channel.
Click on the “Connection Status” button to display the connection status, as shown below.
Figure 5-2: Connection Status screen
This screen shows the following statistics:.
Table 5-2:
Item
IP Address
Subnet Mask
Connection Status Items
Description
The WAN (Internet) IP Address assigned to the router.
The WAN (Internet) Subnet Mask assigned to the router.
Maintenance
202-10099-01, April 2005
5-3
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Table 5-2:
Item
Default Gateway
DHCP Server
DNS Server
Lease Obtained
Lease Expires
Release
Renew
Connection Status Items (continued)
Description
The WAN (Internet) default gateway the router communicates with.
The IP address of the DHCP server which provided the IP configuration addresses.
The IP address of the DNS server which provides network name to IP address translation.
When the DHCP lease was obtained.
When the DHCP lease was expires.
Click the Release button to release the DHCP lease.
Click the Renew button to renew the DHCP lease.
Click on the “Show Statistics” button to display router usage statistics, as shown below.
Figure 5-3: Router Statistics screen
This screen shows the following statistics:
Table 5-3:
Item
Port
Status
TxPkts
RxPkts
Collisions
Tx B/s
Router Statistics Items
Description
The statistics for the WAN (Internet) and LAN (local) ports. For each port, the screen displays:
The link status of the port.
The number of packets transmitted on this port since reset or manual clear.
The number of packets received on this port since reset or manual clear.
The number of collisions on this port since reset or manual clear.
The current transmission (outbound) bandwidth used on the WAN and LAN ports.
5-4 Maintenance
202-10099-01, April 2005
Table 5-3:
Item
Rx B/s
Up Time
Up Time
Poll Interval
Set Interval
Stop
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Router Statistics Items (continued)
Description
The current reception (inbound) bandwidth used on the WAN and LAN ports.
The amount of time since the router was last restarted.
The time elapsed since this port acquired the link.
Specifies the intervals at which the statistics are updated in this window. Click on Stop to freeze the display.
Enter a time and click the button to set the polling frequency.
Click the Stop button to freeze the polling information.
Viewing a List of Attached Devices
The Attached Devices menu contains a table of all IP devices that the router has discovered on the local network. From the Main Menu of the browser interface, under the Maintenance heading, select Attached Devices to view the table, shown below.
Figure 5-4: Attached Devices menu
For each device, the table shows the IP address, NetBIOS Host Name (if available), and Ethernet
MAC address. Note that if the router is rebooted, the table data is lost until the router rediscovers the devices. To force the router to look for attached devices, click the Refresh button.
Configuration File Management
The configuration settings of the WGR614 v6 router are stored within the router in a configuration file. This file can be saved (backed up) to a user’s PC, retrieved (restored) from the user’s PC, or cleared to factory default settings.
Maintenance 5-5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
From the Main Menu of the browser interface, under the Maintenance heading, select the Settings
Backup heading to bring up the menu shown below.
Figure 5-5: Settings Backup menu
Three options are available, and are described in the following sections.
Restoring and Backing Up the Configuration
The Restore and Backup options in the Settings Backup menu allow you to save and retrieve a file containing your router’s configuration settings.
To save your settings, click the Backup button. Your browser will extract the configuration file from the router and will prompt you for a location on your PC to store the file. You can give the file a meaningful name at this time, such as pacbell.cfg.
To restore your settings from a saved configuration file, enter the full path to the file on your PC or click the Browse button to browse to the file. When you have located it, click the Restore button to send the file to the router. The router will then reboot automatically.
Warning: Do not interrupt the reboot process.
5-6 Maintenance
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Erasing the Configuration
It is sometimes desirable to restore the router to original default settings. This can be done by using the Erase function, which will restore all factory settings. After an erase, the router's password will be password, the LAN IP address will be 192.168.1.1, and the router's DHCP client will be enabled.
To erase the configuration, click the Erase button.
To restore the factory default configuration settings without knowing the login password or IP address, you must use the Default Reset button on the rear panel of the router. See
Default Configuration and Password” on page 7-7
.
Upgrading the Router Software
Note: Before upgrading the router software, use the router backup utility to save your configuration settings. Any router upgrade will revert the router settings back to the factory defaults. After completing the upgrade, you can restore your settings from the backup.
The routing software of the WGR614 v6 router is stored in FLASH memory, and can be upgraded as new software is released by NETGEAR. Upgrade files can be downloaded from the NETGEAR
Web site. If the upgrade file is compressed (.ZIP file), you must first extract the file before sending it to the router. The upgrade file can be sent to the router using your browser.
Note: The Web browser used to upload new firmware into the WGR614 v6 router must support
HTTP uploads. NETGEAR recommends using Microsoft Internet Explorer 5.0 and above and
Netscape Navigator 4.7 and above.
From the Main Menu of the browser interface, under the Maintenance heading, select the Router
Upgrade link display the menu shown below.
Maintenance 5-7
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Figure 5-6: Router Upgrade menu
To upload new firmware:
1.
Download and unzip (if the downloaded file is a .zip file) the new software file from
NETGEAR.
2.
3.
In the Router Upgrade menu, click the Browse button and browse to the location of the upgrade file
Click Upload.
Note: When uploading software to the WGR614 v6 router, it is important not to interrupt the
Web browser by closing the window, clicking a link, or loading a new page. If the browser is interrupted, it may corrupt the software. When the upload is complete, your router will automatically restart. The upgrade process will typically take about one minute.
In some cases, you may need to reconfigure the router after upgrading.
Changing the Administrator Password
Note: Before changing the router password, use the router backup utility to save your configuration settings. If after changing the password, you forget the new password you assigned, you will have to reset the router back to the factory defaults to be able to log in using the default password of password. This means you will have to restore all the router configuration settings. If you ever have to reset the router back to the factory defaults, you can restore your settings from the backup.
The default password for the router’s Web Configuration Manager is password. NETGEAR recommends that you change this password to a more secure password.
5-8 Maintenance
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
From the Main Menu of the browser interface, under the Maintenance heading, select Set
Password to bring up the menu shown below.
Figure 5-7: Set Password menu
To change the password, first enter the old password, then enter the new password twice. Click
Apply.
Maintenance
202-10099-01, April 2005
5-9
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
5-10
202-10099-01, April 2005
Maintenance
Chapter 6
Advanced Configuration of the Router
.
This chapter describes how to configure the advanced features of your 54 Mbps Wireless Router
WGR614 v6. These features can be found under the Advanced heading in the Main Menu of the browser interface.
Note: If you are unfamiliar with networking and routing, refer to Appendix B,
“Network, Routing, Firewall, and Basics ,” to become more familiar with the terms and
procedures used in this chapter.
Configuring Port Triggering
Port Triggering is an advanced feature that can be used to easily enable gaming and other internet applications. Port Forwarding is typically used to enable similar functionality, but it is static and has some limitations.
Note: If you use applications such as multi-player gaming, peer-to-peer connections, real time communications such as instant messaging, or remote assistance (a feature in Windows XP), you should also enable UPnP according to the instructions at
“Using Universal Plug and Play (UPnP)“ on page 6-18
.
Port Triggering opens an incoming port temporarily and does not require the server on the internet to track your IP address if it is changed by DHCP, for example.
Port Triggering monitors outbound traffic. When the router detects traffic on the specified outbound port, it remembers the IP address of the computer that sent the data and triggers the incoming port. Incoming traffic on the triggered port is then forwarded to the triggering computer.
Using the Port Triggering page, you can make local computers or servers available to the Internet for different services (for example, FTP or HTTP), to play Internet games (like Quake III), or to use Internet applications (like CUseeMe).
Port Forwarding is designed for FTP, Web Server or other server based services. Once port forwarding is set up, request from Internet will be forwarded to the proper server. On the contrary,
Advanced Configuration of the Router
202-10099-01, April 2005
6-1
Reference Manual for the 54 Mbps Wireless Router WGR614 v6 port triggering will only allow request from Internet after a designated port is 'triggered'. Port triggering applies to chat and Internet games.
Figure 6-1: Port Triggering Menu
Note: If Disable Port Triggering box is checked after configuring port triggering, port triggering will be disabled but any port triggering configuration information you added to the router will be retained even though it will not be used.
• Port Triggering Timeout
Enter a value up to 9999 minutes. The Port Triggering Timeout value controls the inactivity timer for the designated inbound port(s). The inbound port(s) will be closed when the inactivity timer expires.
• For Internet Games or Applications
Before starting, you'll need to know which service, application or game you'll be configuring.
Also, you'll need to have the outbound port (triggering port) address for this game or application.
6-2 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Follow these steps to set up a computer to play Internet games or use Internet applications:
1.
Click Add.
Figure 6-2: Add Port Trigger Menu
2.
3.
4.
5.
6.
7.
Enter a service name in the Service Name box.
Under Service User, selecting Any (default) will allow this service to be used by everyone in your network. Otherwise, select Single address and enter the IP address of one computer to restrict the service to a particular computer.
Select the Service Type.
Enter the outbound port number in Triggering Port box.
Enter the inbound connection port information such as Connection Type, Starting Port and
Ending Port boxes. This information can be obtained from the game or applications manual or support Web site.
Click Apply to save your changes.
Configuring Port Forwarding to Local Servers
Although the router causes your entire local network to appear as a single machine to the Internet, you can make a local server (for example, a Web server or game server) visible and available to the
Internet. This is done using the Port Forwarding menu. From the Main Menu of the browser
Advanced Configuration of the Router
202-10099-01, April 2005
6-3
Reference Manual for the 54 Mbps Wireless Router WGR614 v6 interface, under Advanced, click on Port Forwarding to view the port forwarding menu, shown below.
Figure 6-3: Port Forwarding Menu
Use the Port Forwarding menu to configure the router to forward incoming protocols to computers on your local network. In addition to servers for specific applications, you can also specify a
Default DMZ Server to which all other incoming protocols are forwarded. The DMZ Server is configured in the WAN Setup menu as discussed in
“Configuring the WAN Setup Options“ on page 6-7
.
Before starting, you'll need to determine which type of service, application or game you'll provide and the IP address of the computer that will provide each service. Be sure the computer’s IP address never changes. To configure port forwarding to a local server:
2.
3.
1.
Note: To assure that the same computer always has the same IP address, use the reserved
IP address feature of your WGR614 v6 router. See “Using Address Reservation“ on page
for instructions on how to use reserved IP addresses.
From the Service & Game box, select the service or game that you will host on your network.
If the service does not appear in the list, refer to the following section, “ Adding a Custom
”.
Enter the IP address of the local server in the corresponding Server IP Address box.
Click the Add button.
6-4 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Adding a Custom Service
To define a service, game or application that does not appear in the Services & Games list, you must determine what port numbers are used by the service. For this information, you may need to contact the manufacturer of the program that you wish to use. When you have the port number information, follow these steps:
1.
Click the Add Custom Service button.
Figure 6-4: Ports - Custom Services Menu
4.
5.
2.
3.
Type the service name in the Service Name box.
Type the beginning port number in the Starting Port box.
• If the application uses only a single port; type the same port number in the Ending Port box.
• If the application uses a range of ports; type the ending port number of the range in the
Ending Port box.
Type the IP address of the computer in the Server IP Address box.
Click Apply to save your changes.
Editing or Deleting a Port Forwarding Entry
To edit or delete a Port Forwarding entry, follow these steps.
1.
In the table, select the button next to the service name.
2.
Click Edit or Delete.
Advanced Configuration of the Router
202-10099-01, April 2005
6-5
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Local Web and FTP Server Example
If a local computer with a private IP address of 192.168.1.33 acts as a Web and FTP server, configure the Ports menu to forward HTTP (port 80) and FTP (port 21) to local address
192.168.1.33
In order for a remote user to access this server from the Internet, the remote user must know the IP address that has been assigned by your ISP. If this address is 172.16.1.23, for example, an Internet user can access your Web server by directing the browser to http://172.16.1.23. The assigned IP address can be found in the Maintenance Status Menu, where it is shown as the WAN IP Address.
Some considerations for this application are:
• If your account’s IP address is assigned dynamically by your ISP, the IP address may change periodically as the DHCP lease expires.
• If the IP address of the local computer is assigned by DHCP, it may change when the computer is rebooted. To avoid this, you can manually configure the computer to use a fixed address.
• Local computers must access the local server using the computers’ local LAN address
(192.168.1.33 in this example). Attempts by local computers to access the server using the external IP address (172.16.1.23 in this example) will fail.
Multiple Computers for Half Life, KALI or Quake III Example
To set up an additional computer to play Half Life, KALI or Quake III:
1.
Click the button of an unused port in the table.
2.
3.
4.
5.
6.
Select the game again from the Services/Games list.
Change the beginning port number in the Start Port box.
For these games, use the supplied number in the default listing and add +1 for each additional computer. For example, if you've already configured one computer to play Hexen II (using port 26900), the second computer's port number would be 26901, and the third computer would be 26902.
Type the same port number in the End Port box that you typed in the Start Port box.
Type the IP address of the additional computer in the Server IP Address box.
Click Apply.
6-6 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Some online games and videoconferencing applications are incompatible with NAT. The WGR614 v6 router is programmed to recognize some of these applications and to work properly with them, but there are other applications that may not function well. In some cases, one local computer can run the application properly if that computer’s IP address is entered as the default in the PORTS
Menu. If one local computer acts as a game or videoconferencing host, enter its IP address as the default.
Configuring the WAN Setup Options
The WAN Setup options let you configure a DMZ server, change the MTU size and enable the wireless router to respond to a Ping on the WAN port. These options are discussed below.
Figure 6-5: WAN Setup menu.
Connect Automatically, as Required
Normally, this option should be checked to enable it. An Internet connection will be made automatically after each timeout, whenever Internet-bound traffic is detected. This provides connection on demand and is potentially cost-saving in places in Europe for example where
Internet services charge by the minute.
If disabled, you must connect manually, using the “Connection Status” button on the Router Status screen. This manual connection will stay up all the time without time outs.
Advanced Configuration of the Router
202-10099-01, April 2005
6-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Disabling the SPI Firewall
The SPI (Stateful Packet Inspection) Firewall protects your LAN against Denial of Service attacks.
This should only be disabled in special circumstances.
Setting Up a Default DMZ Server
The default DMZ server feature is helpful when using some online games and videoconferencing applications that are incompatible with NAT. The router is programmed to recognize some of these applications and to work properly with them, but there are other applications that may not function well. In some cases, one local computer can run the application properly if that computer’s IP address is entered as the default DMZ server.
Note: DMZ servers pose a security risk. A computer designated as the default DMZ server loses much of the protection of the firewall, and is exposed to exploits from the
Internet. If compromised, the DMZ server can be used to attack your network.
Incoming traffic from the Internet is normally discarded by the router unless the traffic is a response to one of your local computers or a service that you have configured in the Ports menu.
Instead of discarding this traffic, you can have it forwarded to one computer on your network. This computer is called the Default DMZ Server.
The WAN Setup menu, shown below lets you configure a Default DMZ Server.
To assign a computer or server to be a Default DMZ server, follow these steps:
1.
2.
3.
Click WAN Setup link on the Advanced section of the main menu.
Type the IP address for that server. To remove the default DMZ server, replace the IP address numbers with all zeros.
Click Apply.
Responding to Ping on Internet WAN Port
If you want the router to respond to a 'ping' from the Internet, click the ‘Respond to Ping on
Internet WAN Port’ check box. This should only be used as a diagnostic tool, since it allows your router to be discovered. Don't check this box unless you have a specific reason to do so.
6-8 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Setting the MTU Size
The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes,
1492 Bytes for PPPoE connections, or 1436 for PPTP connections. For some ISPs you may need to reduce the MTU. But this is rarely required, and should not be done unless you are sure it is necessary for your ISP connection.
Any packets sent through the router that are larger than the configured MTU size will be repackaged into smaller packets to meet the MTU requirement. To change the MTU size:
1.
2.
Under MTU Size, enter a new size between 64 and 1500.
Click Apply to save the new configuration.
Using the LAN IP Setup Options
The second feature category under the Advanced heading is LAN IP Setup. This menu allows configuration of LAN IP services such as DHCP and RIP. From the Main Menu of the browser interface, under Advanced, click on LAN IP Setup to view the LAN IP Setup menu, shown below.
Figure 6-6: LAN IP Setup Menu
Advanced Configuration of the Router
202-10099-01, April 2005
6-9
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Configuring LAN TCP/IP Setup Parameters
The router is shipped preconfigured to use private IP addresses on the LAN side, and to act.as a
DHCP server. The router’s default LAN IP configuration is:
• LAN IP addresses—192.168.1.1
• Subnet mask—255.255.255.0
These addresses are part of the IETF-designated private address range for use in private networks, and should be suitable in most applications. If your network has a requirement to use a different IP addressing scheme, you can make those changes in this menu.
The LAN IP parameters are:
• IP Address
This is the LAN IP address of the router.
• IP Subnet Mask
This is the LAN Subnet Mask of the router. Combined with the IP address, the IP Subnet Mask allows a device to know which other addresses are local to it, and which must be reached through a gateway or router.
• RIP Direction
RIP (Router Information Protocol) allows a router to exchange routing information with other routers. The RIP Direction selection controls how the router sends and receives RIP packets.
None is the default.
— When set to Both or Out Only, the router will broadcast its routing table periodically.
— When set to Both or In Only, it will incorporate the RIP information that it receives.
— When set to None (default), it will not send any RIP packets and will ignore any RIP packets received.
• RIP Version
This controls the format and the broadcasting method of the RIP packets that the router sends.
(It recognizes both formats when receiving.) By default, this is set for RIP-1.
— RIP-1 is universally supported. RIP-1 is probably adequate for most networks, unless you have an unusual network setup.
— RIP-2 carries more information. RIP-2B uses subnet broadcasting.
6-10 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Note: If you change the LAN IP address of the router while connected through the browser, you will be disconnected. You must then open a new connection to the new IP address and log in again.
Using the Router as a DHCP server
By default, the router will function as a DHCP (Dynamic Host Configuration Protocol) server, allowing it to assign IP, DNS server, and default gateway addresses to all computers connected to the router's LAN. The assigned default gateway address is the LAN address of the router. IP addresses will be assigned to the attached computers from a pool of addresses specified in this menu. Each pool address is tested before it is assigned to avoid duplicate addresses on the LAN.
For most applications, the default DHCP and TCP/IP settings of the router are satisfactory. See “IP
Configuration by DHCP ” on page B-10
for an explanation of DHCP and information about how to assign IP addresses for your network.
If another device on your network will be the DHCP server, or if you will manually configure the network settings of all of your computers, clear the ‘Use router as DHCP server’ check box.
Otherwise, leave it checked.
Specify the pool of IP addresses to be assigned by setting the Starting IP Address and Ending IP
Address. These addresses should be part of the same IP address subnet as the router’s LAN IP address. Using the default addressing scheme, you should define a range between 192.168.1.2 and
192.168.1.253, although you may wish to save part of the range for devices with fixed addresses.
The router will deliver the following parameters to any LAN device that requests DHCP:
• An IP Address from the range you have defined
• Subnet Mask
• Gateway IP Address (the router’s LAN IP address)
• Primary DNS Server (if you entered a Primary DNS address in the Basic Settings menu; otherwise, the router’s LAN IP address)
• Secondary DNS Server (if you entered a Secondary DNS address in the Basic Settings menu
Advanced Configuration of the Router
202-10099-01, April 2005
6-11
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Using Address Reservation
When you specify a reserved IP address for a computer on the LAN, that computer will always receive the same IP address each time it access the router’s DHCP server. Reserved IP addresses should be assigned to servers that require permanent IP settings.
To reserve an IP address:
1.
Click the Add button.
Figure 6-7: Address Reservation menu
2.
3.
4.
In the IP Address box, type the IP address to assign to the computer or server.
(choose an IP address from the router’s LAN subnet, such as 192.168.1.X)
Type the MAC Address of the computer or server.
(Tip: If the computer is already present on your network, you can copy its MAC address from the Attached Devices menu and paste it here.)
Click Apply to enter the reserved address into the table.
Note: The reserved address will not be assigned until the next time the computer contacts the router's DHCP server. Reboot the computer or access its IP configuration and force a DHCP release and renew.
To edit or delete a reserved address entry:
1.
Click the button next to the reserved address you want to edit or delete.
2.
Click Edit or Delete.
6-12 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Using a Dynamic DNS Service
If your network has a permanently assigned IP address, you can register a domain name and have that name linked with your IP address by public Domain Name Servers (DNS). However, if your
Internet account uses a dynamically assigned IP address, you will not know in advance what your
IP address will be, and the address can change frequently. In this case, you can use a commercial dynamic DNS service, who will allow you to register your domain to their IP address, and will forward traffic directed at your domain to your frequently-changing IP address.
Note: If your ISP assigns a private WAN IP address (such as 192.168.x.x or 10.x.x.x), the dynamic DNS service will not work because private addresses will not be routed on the Internet.
The router contains a client that can connect to many popular dynamic DNS services. You can select one of these services and obtain an account with them. Then, whenever your ISP-assigned
IP address changes, your router will automatically contact your dynamic DNS service provider, log in to your account, and register your new IP address.
From the Main Menu of the browser interface, under Advanced, click on Dynamic DNS.
Figure 6-8: Dynamic DNS menu
To configure Dynamic DNS:
1.
Register for an account with one of the dynamic DNS service providers whose names appear in the ‘Select Service Provider’ box. For example, for dyndns.org, go to www.dyndns.org.
Advanced Configuration of the Router
202-10099-01, April 2005
6-13
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
2.
3.
4.
5.
6.
7.
8.
Select the Use a dynamic DNS service check box.
Select the name of your dynamic DNS Service Provider.
Type the Host Name (or domain name) that your dynamic DNS service provider gave you.
Type the User Name for your dynamic DNS account.
Type the Password (or key) for your dynamic DNS account.
If your dynamic DNS provider allows the use of wildcards in resolving your URL, you may select the Use wildcards check box to activate this feature.
For example, the wildcard feature will cause *.yourhost.dyndns.org to be aliased to the same
IP address as yourhost.dyndns.org
Click Apply to save your configuration.
Configuring Static Routes
Static Routes provide additional routing information to your router. Under normal circumstances, the router has adequate routing information after it has been configured for Internet access, and you do not need to configure additional static routes. You must configure static routes only for unusual cases such as multiple routers or multiple IP subnets located on your network.
From the Main Menu of the browser interface, under Advanced, click on Static Routes to view the
Static Route menu, shown below.
Figure 6-9.
Static Route Summary Table
6-14 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
To add or edit a Static Route:
1.
Click the Add button to open the Add/Edit Menu, shown below.
Figure 6-10.
Static Route Entry and Edit Menu
7.
8.
4.
5.
6.
2.
3.
9.
Type a route name for this static route in the Route Name box under the table.
(This is for identification purposes only.)
Select Private if you want to limit access to the LAN only. The static route will not be reported in RIP.
Select Active to make this route effective.
Type the Destination IP Address of the final destination.
Type the IP Subnet Mask for this destination.
If the destination is a single host, type 255.255.255.255.
Type the Gateway IP Address, which must be a router on the same LAN segment as the router.
Type a number between 1 and 15 as the Metric value.
This represents the number of routers between your network and the destination. Usually, a setting of 2 or 3 works, but if this is a direct connection, set it to 1.
Click Apply to have the static route entered into the table.
As an example of when a static route is needed, consider the following case:
• Your primary Internet access is through a cable modem to an ISP.
• You have an ISDN router on your home network for connecting to the company where you are employed. This router’s address on your LAN is 192.168.1.100.
• Your company’s network is 134.177.0.0.
Advanced Configuration of the Router
202-10099-01, April 2005
6-15
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
When you first configured your router, two implicit static routes were created. A default route was created with your ISP as the gateway, and a second static route was created to your local network for all 192.168.1.x addresses. With this configuration, if you attempt to access a device on the
134.177.0.0 network, your router will forward your request to the ISP. The ISP forwards your request to the company where you are employed, and the request will likely be denied by the company’s firewall.
In this case you must define a static route, telling your router that 134.177.0.0 should be accessed
through the ISDN router at 192.168.1.100. The static route would look like Figure 6-10
.
In this example:
• The Destination IP Address and IP Subnet Mask fields specify that this static route applies to all 134.177.x.x addresses.
• The Gateway IP Address fields specifies that all traffic for these addresses should be forwarded to the ISDN router at 192.168.1.100.
• A Metric value of 1 will work since the ISDN router is on the LAN.
• Private is selected only as a precautionary security measure in case RIP is activated.
Enabling Remote Management Access
Using the Remote Management page, you can allow a user or users on the Internet to configure, upgrade and check the status of your WGR614 v6 router.
Note: Be sure to change the router's default configuration password to a very secure password. The ideal password should contain no dictionary words from any language, and should be a mixture of letters (both upper and lower case), numbers, and symbols.
Your password can be up to 30 characters.
6-16 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Figure 6-11: Remote Management menu
To configure your router for Remote Management:
1.
2.
Select the Turn Remote Management On check box.
Specify what external addresses will be allowed to access the router’s remote management.
Note: For enhanced security, restrict access to as few external IP addresses as practical.
3.
4.
a.
b.
c.
To allow access from any IP address on the Internet, select Everyone.
To allow access from a range of IP addresses on the Internet, select IP address range.
Enter a beginning and ending IP address to define the allowed range.
To allow access from a single IP address on the Internet, select Only this computer.
Enter the IP address that will be allowed access.
Specify the Port Number that will be used for accessing the management interface.
Web browser access normally uses the standard HTTP service port 80. For greater security, change the remote management Web interface to a custom port by entering that number in the box provided. Choose a number between 1024 and 65535, but do not use the number of any common service port. The default is 8080, which is a common alternate for HTTP.
Click Apply to have your changes take effect.
Advanced Configuration of the Router
202-10099-01, April 2005
6-17
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Note: When accessing your router from the Internet, you will type your router's WAN IP address into your browser's Address (in IE) or Location (in Netscape) box, followed by a colon (:) and the custom port number. For example, if your external address is 134.177.0.123 and you use port number 8080, you must enter http://134.177.0.123:8080 in your browser. The Remote
Management Address from the Remote Management Window (see
Figure 6-11 ) is the address you
will enter in your browser's address field.
Using Universal Plug and Play (UPnP)
Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers, access the network and connect to other devices as needed. UPnP devices can automatically discover the services from other registered UPnP devices on the network.
Figure 6-12.
UPnP Menu
From the Main Menu of the browser interface, under Advanced, click on UPnP. Set up UPnP according to the guidelines below.
Turn UPnP On: UPnP can be enabled or disabled for automatic device configuration. The default setting for UPnP is disabled. If disabled, the router will not allow any device to automatically control the resources, such as port forwarding (mapping), of the router.
6-18 Advanced Configuration of the Router
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Note: If you use applications such as multi-player gaming, peer-to-peer connections, real time communications such as instant messaging, or remote assistance (a feature in Windows XP), you should enable UPnP.
Advertisement Period: The Advertisement Period is how often the router will broadcast its UPnP information. This value can range from 1 to 1440 minutes. The default period is 30 minutes.
Shorter durations will ensure that control points have current device status at the expense of additional network traffic. Longer durations may compromise the freshness of the device status but can significantly reduce network traffic.
Advertisement Time To Live: The time to live for the advertisement is measured in hops (steps) for each UPnP packet sent. The time to live hop count is the number of steps a broadcast packet is allowed to propagate for each UPnP advertisement before it disappears. The number of hops can range from 1 to 255. The default value for the advertisement time to live is 4 hops, which should be fine for most home networks. If you notice that some devices are not being updated or reached correctly, then it may be necessary to increase this value a little.
UPnP Portmap Table: The UPnP Portmap Table displays the IP address of each UPnP device that is currently accessing the router and which ports (Internal and External) that device has opened.
The UPnP Portmap Table also displays what type of port is opened and if that port is still active for each IP address.
Advanced Configuration of the Router
202-10099-01, April 2005
6-19
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
6-20 Advanced Configuration of the Router
202-10099-01, April 2005
Chapter 7
Troubleshooting
This chapter gives information about troubleshooting your 54 Mbps Wireless Router WGR614 v6.
After each problem description, instructions are provided to help you diagnose and solve the problem.
Basic Functioning
After you turn on power to the router, the following sequence of events should occur:
1.
When power is first applied, verify that the Power light is on.
2.
After approximately 10 seconds, verify that: a.
b.
The power light is solid green.
The LAN port lights are lit for any local ports that are connected.
c.
The Internet port light is lit.
If a port’s light is lit, a link has been established to the connected device. If a LAN port is connected to a 100 Mbps device, verify that the port’s light is green. If the port is 10 Mbps, the light will be amber.
If any of these conditions does not occur, refer to the appropriate following section.
Power Light Not On
If the Power and other lights are off when your router is turned on:
• Make sure that the power cord is properly connected to your router and that the power supply adapter is properly connected to a functioning power outlet.
• Check that you are using the 12 V DC 1A power adapter supplied by NETGEAR for this product.
If the error persists, you have a hardware problem and should contact technical support.
Troubleshooting 7-1
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Lights Never Turn Off
When the router is turned on, the lights turns on for about 10 seconds and then turn off. If all the lights stay on, there is a fault within the router.
If all lights are still on one minute after power up:
• Cycle the power to see if the router recovers.
• Clear the router’s configuration to factory defaults. This will set the router’s IP address to
192.168.1.1. This procedure is explained in “Restoring the Default Configuration and
.
If the error persists, you might have a hardware problem and should contact technical support.
LAN or WAN Port Lights Not On
If either the LAN lights or Internet light do not light when the Ethernet connection is made, check the following:
• Make sure that the Ethernet cable connections are secure at the router and at the hub or workstation.
• Make sure that power is turned on to the connected hub or workstation.
• Be sure you are using the correct cable:
— When connecting the router’s Internet port to a cable or DSL modem, use the cable that was supplied with the cable or DSL modem. This cable could be a standard straight-through Ethernet cable or an Ethernet crossover cable.
7-2
202-10099-01, April 2005
Troubleshooting
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Troubleshooting the Web Configuration Interface
If you are unable to access the router’s Web Configuration interface from a computer on your local network, check the following:
• Check the Ethernet connection between the computer and the router as described in the previous section.
• Make sure your computer’s IP address is on the same subnet as the router. If you are using the recommended addressing scheme, your computer’s address should be in the range of
192.168.1.2 to 192.168.1.254. Refer to “Verifying TCP/IP Properties” on page C-8
or
“Verifying TCP/IP Properties for Macintosh Computers” on page C-19 to find your
computer’s IP address. Follow the instructions in Appendix C to configure your computer.
Note: If your computer’s IP address is shown as 169.254.x.x: Recent versions of Windows and MacOS will generate and assign an IP address if the computer cannot reach a DHCP server. These auto-generated addresses are in the range of 169.254.x.x. If your IP address is in this range, check the connection from the computer to the router and reboot your computer.
• If your router’s IP address has been changed and you don’t know the current IP address, clear the router’s configuration to factory defaults. This will set the router’s IP address to
192.168.1.1. This procedure is explained in “Restoring the Default Configuration and
.
• Make sure your browser has Java, JavaScript, or ActiveX enabled. If you are using Internet
Explorer, click Refresh to be sure the Java applet is loaded.
• Try quitting the browser and launching it again.
• Make sure you are using the correct login information. The factory default login name is
admin and the password is password. Make sure that CAPS LOCK is off when entering this information.
If the router does not save changes you have made in the Web Configuration Interface, check the following:
• When entering configuration settings, be sure to click the APPLY button before moving to another menu or tab, or your changes are lost.
• Click the Refresh or Reload button in the Web browser. The changes may have occurred, but the Web browser may be caching the old configuration.
Troubleshooting 7-3
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Troubleshooting the ISP Connection
If your router is unable to access the Internet, you should first determine whether the router is able to obtain a WAN IP address from the ISP. Unless you have been assigned a static IP address, your router must request an IP address from the ISP. You can determine whether the request was successful using the Web Configuration Manager.
To check the WAN IP address:
1.
Launch your browser and select an external site such as www.netgear.com
2.
3.
4.
Access the Main Menu of the router’s configuration at http://www.routerlogin.net.
Under the Maintenance heading, select Router Status
Check that an IP address is shown for the WAN Port
If 0.0.0.0 is shown, your router has not obtained an IP address from your ISP.
If your router is unable to obtain an IP address from the ISP, you may need to force your cable or
DSL modem to recognize your new router by performing the following procedure:
1.
2.
Turn off power to the cable or DSL modem.
Turn off power to your router.
3.
4.
5.
Wait five minutes and reapply power to the cable or DSL modem.
When the modem’s lights indicate that it has reacquired sync with the ISP, reapply power to your router.
Then restart your computer.
If your router is still unable to obtain an IP address from the ISP, the problem may be one of the following:
• Your ISP may require a login program.
Ask your ISP whether they require PPP over Ethernet (PPPoE) or some other type of login.
• If your ISP requires a login, you may have incorrectly set the login name and password.
• Your ISP may check for your computer's host name.
Assign the computer Host Name of your ISP account as the Account Name in the Basic
Settings menu.
• Your ISP only allows one Ethernet MAC address to connect to Internet, and may check for your computer’s MAC address. In this case:
7-4 Troubleshooting
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Inform your ISP that you have bought a new network device, and ask them to use the router’s
MAC address.
OR
Configure your router to spoof your computer’s MAC address. This can be done in the Basic
Settings menu.
If your router can obtain an IP address, but your computer is unable to load any Web pages from the Internet:
• Your computer may not recognize any DNS server addresses.
A DNS server is a host on the Internet that translates Internet names (such as www addresses) to numeric IP addresses. Typically your ISP will provide the addresses of one or two DNS servers for your use. If you entered a DNS address during the router’s configuration, reboot
your computer and verify the DNS address as described in “Install or Verify Windows
Networking Components” on page C-9
. Alternatively, you may configure your computer manually with DNS addresses, as explained in your operating system documentation.
• Your computer may not have the router configured as its TCP/IP gateway.
If your computer obtains its information from the router by DHCP, reboot the computer and
verify the gateway address as described in “Install or Verify Windows Networking
.
Troubleshooting a TCP/IP Network Using a Ping Utility
Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request packet to the designated device. The device then responds with an echo reply. Troubleshooting a TCP/IP network is made very easy by using the ping utility in your computer or workstation.
Testing the LAN Path to Your Router
You can ping the router from your computer to verify that the LAN path to your router is set up correctly.
To ping the router from a running Windows 95 or later:
1.
2.
From the Windows toolbar, click on the Start button and select Run.
In the field provided, type Ping followed by the IP address of the router, as in this example: ping 192.168.1.1
Troubleshooting 7-5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
3.
Click on OK.
You should see a message like this one:
Pinging <IP address> with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
If the path is not working, you see this message:
Request timed out
If the path is not functioning correctly, you could have one of the following problems:
• Wrong physical connections
— Check that the corresponding Link LEDs are on for your network interface card and for the hub ports (if any) that are connected to your workstation and router.
• Wrong network configuration
— Verify that the Ethernet card driver software and TCP/IP software are both installed and configured on your computer or workstation.
— Verify that the IP address for your router and your workstation are correct and that the addresses are on the same subnet.
Testing the Path from Your Computer to a Remote Device
After verifying that the LAN path works correctly, test the path from your computer to a remote device. From the Windows run menu, type:
PING -n 10 <IP address> where <IP address> is the IP address of a remote device such as your ISP’s DNS server.
If the path is functioning correctly, replies as in the previous section are displayed. If you do not receive replies:
— Check that your computer has the IP address of your router listed as the default gateway. If the IP configuration of your computer is assigned by DHCP, this information will not be visible in your computer’s Network Control Panel. Verify that the IP address of the router
is listed as the default gateway as described in “Install or Verify Windows Networking
.
7-6 Troubleshooting
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
— Check to see that the network address of your computer (the portion of the IP address specified by the netmask) is different from the network address of the remote device.
— Check that your cable or DSL modem is connected and functioning.
— If your ISP assigned a host name to your computer, enter that host name as the Account
Name in the Basic Settings menu.
— Your ISP could be rejecting the Ethernet MAC addresses of all but one of your computers.
Many broadband ISPs restrict access by only allowing traffic from the MAC address of your broadband modem, but some ISPs additionally restrict access to the MAC address of a single computer connected to that modem. If this is the case, you must configure your router to “clone” or “spoof” the MAC address from the authorized computer.
Restoring the Default Configuration and Password
This section explains how to restore the factory default configuration settings, changing the router’s administration password to password and the IP address to 192.168.1.1. You can erase the current configuration and restore factory defaults in two ways:
• Use the Erase function of the router (see
“Erasing the Configuration” on page 5-7 ).
• Use the Default Reset button on the rear panel of the router. Use this method for cases when the administration password or IP address is not known.
To restore the factory default configuration settings without knowing the administration password or IP address, you must use the Default Reset button on the rear panel of the router.
1.
2.
Press and hold the Default Reset button until the power light blinks on (about 10 seconds).
Release the Default Reset button and wait for the router to reboot.
If the wireless router fails to restart or the power light continues to blink or turns solid amber, the unit may be defective. If the error persists, you might have a hardware problem and should contact technical support.
Problems with Date and Time
The E-Mail menu in the Content Filtering section displays the current date and time of day. The
WGR614 v6 router uses the Network Time Protocol (NTP) to obtain the current time from one of several Network Time Servers on the Internet. Each entry in the log is stamped with the date and time of day. Problems with the date and time function can include:
Troubleshooting 7-7
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Date shown is January 1, 2000. Cause: The router has not yet successfully reached a Network
Time Server. Check that your Internet access settings are configured correctly. If you have just completed configuring the router, wait at least five minutes and check the date and time again.
• Time is off by one hour. Cause: The router does not automatically sense Daylight Savings
Time. In the E-Mail menu, check or uncheck the box marked “Adjust for Daylight Savings
Time”.
7-8
202-10099-01, April 2005
Troubleshooting
Appendix A
Technical Specifications
This appendix provides technical specifications for the 54 Mbps Wireless Router WGR614 v6.
Network Protocol and Standards Compatibility
Data and Routing Protocols: TCP/IP, RIP-1, RIP-2, DHCP
PPP over Ethernet (PPPoE)
Power Adapter
North America:
United Kingdom, Australia:
Europe:
Japan:
All regions (output):
120V, 60 Hz, input
240V, 50 Hz, input
230V, 50 Hz, input
100V, 50/60 Hz, input
12 V DC @ 1A output, 22W maximum
Physical Specifications
Dimensions:
Weight:
28 x 175 x 119 mm (1.1 x 6.89 x 4.68 in.)
0.3 kg (0.66 lb)
Environmental Specifications
Operating temperature:
Operating humidity:
Electromagnetic Emissions
Meets requirements of:
0
° to 40° C (32º to 104º F)
90% maximum relative humidity, noncondensing
FCC Part 15 Class B
VCCI Class B
EN 55 022 (CISPR 22), Class B
C-Tick N10947
Interface Specifications
LAN:
WAN:
10BASE-T or 100BASE-Tx, RJ-45
10BASE-T or 100BASE-Tx, RJ-45
Technical Specifications A-1
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Wireless
Radio Data Rates
Frequency
Data Encoding:
Maximum Computers Per Wireless
Network:
Operating Frequency Ranges:
802.11 Security:
1, 2, 5.5, 6, 9, 12, 18, 24, 36, 48, and 54 Mbps
Auto Rate Sensing
2.4-2.5Ghz
802.11b: Direct Sequence Spread Spectrum (DSSS)
802.11g: Orthogonal Frequency Division Multiplexing (OFDM)
Limited by the amount of wireless network traffic generated by each node. Typically 30-70 nodes.
2.412~2.462 GHz (US) 2.457~2.462 GHz (Spain)
2.412~2.484 GHz (Japan)2.457~2.472 GHz (France)
2.412~2.472 GHz (Europe ETSI)
40-bits (also called 64-bits) and 128-bits WEP and WPA-PSK
A-2
202-10099-01, April 2005
Technical Specifications
Appendix B
Network, Routing, Firewall, and Basics
This chapter provides an overview of IP networks, routing, and networking.
Related Publications
As you read this document, you may be directed to various RFC documents for further information. An RFC is a Request For Comment (RFC) published by the Internet Engineering
Task Force (IETF), an open organization that defines the architecture and operation of the Internet.
The RFC documents outline and define the standard protocols and procedures for the Internet. The documents are listed on the World Wide Web at www.ietf.org
and are mirrored and indexed at many other sites worldwide.
Basic Router Concepts
Large amounts of bandwidth can be provided easily and relatively inexpensively in a local area network (LAN). However, providing high bandwidth between a local network and the Internet can be very expensive. Because of this expense, Internet access is usually provided by a slower-speed wide-area network (WAN) link such as a cable or DSL modem. In order to make the best use of the slower WAN link, a mechanism must be in place for selecting and transmitting only the data traffic meant for the Internet. The function of selecting and forwarding this data is performed by a router.
What is a Router?
A router is a device that forwards traffic between networks based on network layer information in the data and on routing tables maintained by the router. In these routing tables, a router builds up a logical picture of the overall network by gathering and exchanging information with other routers in the network. Using this information, the router chooses the best path for forwarding network traffic.
Routers vary in performance and scale, number of routing protocols supported, and types of physical WAN connection they support. The 54 Mbps Wireless Router WGR614 v6 is a small office router that routes the IP protocol over a single-user broadband connection.
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-1
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Routing Information Protocol
One of the protocols used by a router to build and maintain a picture of the network is the Routing
Information Protocol (RIP). Using RIP, routers periodically update one another and check for changes to add to the routing table.
The WGR614 v6 router supports both the older RIP-1 and the newer RIP-2 protocols. Among other improvements, RIP-2 supports subnet and multicast protocols. RIP is not required for most home applications.
IP Addresses and the Internet
Because TCP/IP networks are interconnected across the world, every machine on the Internet must have a unique address to make sure that transmitted data reaches the correct destination. Blocks of addresses are assigned to organizations by the Internet Assigned Numbers Authority (IANA).
Individual users and small organizations may obtain their addresses either from the IANA or from an Internet service provider (ISP). You can contact IANA at www.iana.org.
The Internet Protocol (IP) uses a 32-bit address structure. The address is usually written in dot notation (also called dotted-decimal notation), in which each group of eight bits is written in decimal form, separated by decimal points.
For example, the following binary address:
11000011 00100010 00001100 00000111 is normally written as:
195.34.12.7
The latter version is easier to remember and easier to enter into your computer.
In addition, the 32 bits of the address are subdivided into two parts. The first part of the address identifies the network, and the second part identifies the host node or station on the network. The dividing point may vary depending on the address range and the application.
There are five standard classes of IP addresses. These address classes have different ways of determining the network and host sections of the address, allowing for different numbers of hosts on a network. Each address type begins with a unique bit pattern, which is used by the TCP/IP software to identify the address class. After the address class has been determined, the software can correctly identify the host section of the address. The follow figure shows the three main address classes, including network and host sections of the address for each address type.
B-2 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Class A
Network
Class B
Node
Network Node
Class C
Network
Figure B-1: Three Main Address Classes
Node
7261
The five address classes are:
• Class A
Class A addresses can have up to 16,777,214 hosts on a single network. They use an eight-bit network number and a 24-bit node number. Class A addresses are in this range:
1.x.x.x to 126.x.x.x.
• Class B
Class B addresses can have up to 65,354 hosts on a network. A Class B address uses a 16-bit network number and a 16-bit node number. Class B addresses are in this range:
128.1.x.x to 191.254.x.x.
• Class C
Class C addresses can have 254 hosts on a network. Class C addresses use 24 bits for the network address and eight bits for the node. They are in this range:
192.0.1.x to 223.255.254.x.
• Class D
Class D addresses are used for multicasts (messages sent to many hosts). Class D addresses are in this range:
224.0.0.0 to 239.255.255.255.
• Class E
Class E addresses are for experimental use.
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-3
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
This addressing structure allows IP addresses to uniquely identify each physical network and each node on each physical network.
For each unique value of the network portion of the address, the base address of the range (host address of all zeros) is known as the network address and is not usually assigned to a host. Also, the top address of the range (host address of all ones) is not assigned, but is used as the broadcast address for simultaneously sending a packet to all hosts with the same network address.
Netmask
In each of the address classes previously described, the size of the two parts (network address and host address) is implied by the class. This partitioning scheme can also be expressed by a netmask associated with the IP address. A netmask is a 32-bit quantity that, when logically combined (using an AND operator) with an IP address, yields the network address. For instance, the netmasks for
Class A, B, and C addresses are 255.0.0.0, 255.255.0.0, and 255.255.255.0, respectively.
For example, the address 192.168.170.237 is a Class C IP address whose network portion is the upper 24 bits. When combined (using an AND operator) with the Class C netmask, as shown here, only the network portion of the address remains:
11000000 10101000 10101010 11101101 (192.168.170.237) combined with:
11111111 11111111 11111111 00000000 (255.255.255.0)
Equals:
11000000 10101000 10101010 00000000 (192.168.170.0)
As a shorter alternative to dotted-decimal notation, the netmask may also be expressed in terms of the number of ones from the left. This number is appended to the IP address, following a backward slash (/), as “/n.” In the example, the address could be written as 192.168.170.237/24, indicating that the netmask is 24 ones followed by 8 zeros.
Subnet Addressing
By looking at the addressing structures, you can see that even with a Class C address, there are a large number of hosts per network. Such a structure is an inefficient use of addresses if each end of a routed link requires a different network number. It is unlikely that the smaller office LANs would have that many devices. You can resolve this problem by using a technique known as subnet addressing.
B-4 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Subnet addressing allows us to split one IP network address into smaller multiple physical networks known as subnetworks. Some of the node numbers are used as a subnet number instead.
A Class B address gives us 16 bits of node numbers translating to 64,000 nodes. Most organizations do not use 64,000 nodes, so there are free bits that can be reassigned. Subnet addressing makes use of those bits that are free, as shown below.
Class B
Network Subnet Node
7262
Figure B-2: Example of Subnetting a Class B Address
A Class B address can be effectively translated into multiple Class C addresses. For example, the
IP address of 172.16.0.0 is assigned, but node addresses are limited to 255 maximum, allowing eight extra bits to use as a subnet address. The IP address of 172.16.97.235 would be interpreted as
IP network address 172.16, subnet number 97, and node number 235. In addition to extending the number of addresses available, subnet addressing provides other benefits. Subnet addressing allows a network manager to construct an address scheme for the network by using different subnets for other geographical locations in the network or for other departments in the organization.
Although the preceding example uses the entire third octet for a subnet address, note that you are not restricted to octet boundaries in subnetting. To create more network numbers, you need only shift some bits from the host address to the network address. For instance, to partition a Class C network number (192.68.135.0) into two, you shift one bit from the host address to the network address. The new netmask (or subnet mask) is 255.255.255.128. The first subnet has network number 192.68.135.0 with hosts 192.68.135.1 to 129.68.135.126, and the second subnet has network number 192.68.135.128 with hosts 192.68.135.129 to 192.68.135.254.
Note: The number 192.68.135.127 is not assigned because it is the broadcast address of the first subnet. The number 192.68.135.128 is not assigned because it is the network address of the second subnet.
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-5
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
The following table lists the additional subnet mask bits in dotted-decimal notation. To use the table, write down the original class netmask and replace the 0 value octets with the dotted-decimal value of the additional subnet bits. For example, to partition your Class C network with subnet mask 255.255.255.0 into 16 subnets (4 bits), the new subnet mask becomes 255.255.255.240.
Table 7-1.
Netmask Notation Translation Table for One Octet
Number of Bits Dotted-Decimal Value
7
8
5
6
3
4
1
2
128
192
224
240
248
252
254
255
The following table displays several common netmask values in both the dotted-decimal and the masklength formats.
Table 7-2.
Netmask Formats
Dotted-Decimal
255.0.0.0
255.255.0.0
255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
255.255.255.254
255.255.255.255
Masklength
/26
/27
/28
/29
/8
/16
/24
/25
/30
/31
/32
Configure all hosts on a LAN segment to use the same netmask for the following reasons:
B-6 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• So that hosts recognize local IP broadcast packets
When a device broadcasts to its segment neighbors, it uses a destination address of the local network address with all ones for the host address. In order for this scheme to work, all devices on the segment must agree on which bits comprise the host address.
• So that a local router or bridge recognizes which addresses are local and which are remote
Private IP Addresses
If your local network is isolated from the Internet (for example, when using NAT), you can assign any IP addresses to the hosts without problems. However, the IANA has reserved the following three blocks of IP addresses specifically for private networks:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Choose your private network number from this range. The DHCP server of the WGR614 v6 router is preconfigured to automatically assign private addresses.
Regardless of your particular situation, do not create an arbitrary IP address; always follow the guidelines explained here. For more information about address assignment, refer to RFC 1597,
Address Allocation for Private Internets, and RFC 1466, Guidelines for Management of IP
Address Space. The Internet Engineering Task Force (IETF) publishes RFCs on its Web site at www.ietf.org.
Single IP Address Operation Using NAT
In the past, if multiple computers on a LAN needed to access the Internet simultaneously, you had to obtain a range of IP addresses from the ISP. This type of Internet account is more costly than a single-address account typically used by a single user with a modem, rather than a router. The
WGR614 v6 router employs an address-sharing method called Network Address Translation
(NAT). This method allows several networked computers to share an Internet account using only a single IP address, which may be statically or dynamically assigned by your ISP.
The router accomplishes this address sharing by translating the internal LAN IP addresses to a single address that is globally unique on the Internet. The internal LAN IP addresses can be either private addresses or registered addresses. For more information about IP address translation, refer to RFC 1631, The IP Network Address Translator (NAT).
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
The following figure illustrates a single IP address operation.
Private IP addresses assigned by user
IP addresses assigned by ISP
192.168.0.2
192.168.0.3
192.168.0.4
192.168.0.1
172.21.15.105
Internet
192.168.0.5
7786EA
Figure B-3: Single IP Address Operation Using NAT
This scheme offers the additional benefit of firewall-like protection because the internal LAN addresses are not available to the Internet through the translated connection. All incoming inquiries are filtered out by the router. This filtering can prevent intruders from probing your system. However, using port forwarding, you can allow one computer (for example, a Web server) on your local network to be accessible to outside users.
MAC Addresses and Address Resolution Protocol
An IP address alone cannot be used to deliver data from one LAN device to another. To send data between LAN devices, you must convert the IP address of the destination device to its media access control (MAC) address. Each device on an Ethernet network has a unique MAC address, which is a 48-bit number assigned to each device by the manufacturer. The technique that associates the IP address with a MAC address is known as address resolution. Internet Protocol uses the Address Resolution Protocol (ARP) to resolve MAC addresses.
B-8 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
If a device sends data to another station on the network and the destination MAC address is not yet recorded, ARP is used. An ARP request is broadcast onto the network. All stations on the network receive and read the request. The destination IP address for the chosen station is included as part of the message so that only the station with this IP address responds to the ARP request. All other stations discard the request.
Related Documents
The station with the correct IP address responds with its own MAC address directly to the sending device. The receiving station provides the transmitting station with the required destination MAC address. The IP address data and MAC address data for each station are held in an ARP table. The next time data is sent, the address can be obtained from the address information in the table.
For more information about address assignment, refer to the IETF documents RFC 1597, Address
Allocation for Private Internets, and RFC 1466, Guidelines for Management of IP Address Space.
For more information about IP address translation, refer to RFC 1631, The IP Network Address
Translator (NAT).
Domain Name Server
Many of the resources on the Internet can be addressed by simple descriptive names such as www.NETGEAR.com
. This addressing is very helpful at the application level, but the descriptive name must be translated to an IP address in order for a user to actually contact the resource. Just as a telephone directory maps names to phone numbers, or as an ARP table maps IP addresses to
MAC addresses, a domain name system (DNS) server maps descriptive names of network resources to IP addresses.
When a computer accesses a resource by its descriptive name, it first contacts a DNS server to obtain the IP address of the resource. The computer sends the desired message using the IP address. Many large organizations, such as ISPs, maintain their own DNS servers and allow their customers to use the servers to look up addresses.
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-9
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
IP Configuration by DHCP
When an IP-based local area network is installed, each computer must be configured with an
IP address. If the computers need to access the Internet, they should also be configured with a gateway address and one or more DNS server addresses. As an alternative to manual configuration, there is a method by which each computer on the network can automatically obtain this configuration information. A device on the network may act as a Dynamic Host Configuration
Protocol (DHCP) server. The DHCP server stores a list or pool of IP addresses, along with other information (such as gateway and DNS addresses) that it may assign to the other devices on the network. The WGR614 v6 router has the capacity to act as a DHCP server.
The WGR614 v6 router also functions as a DHCP client when connecting to the ISP. The firewall can automatically obtain an IP address, subnet mask, DNS server addresses, and a gateway address if the ISP provides this information by DHCP.
Internet Security and Firewalls
When your LAN connects to the Internet through a router, an opportunity is created for outsiders to access or disrupt your network. A NAT router provides some protection because by the very nature of the process, the network behind the router is shielded from access by outsiders on the
Internet. However, there are methods by which a determined hacker can possibly obtain information about your network or at the least can disrupt your Internet access. A greater degree of protection is provided by a firewall router.
What is a Firewall?
A firewall is a device that protects one network from another, while allowing communication between the two. A firewall incorporates the functions of the NAT router, while adding features for dealing with a hacker intrusion or attack. Several known types of intrusion or attack can be recognized when they occur. When an incident is detected, the firewall can log details of the attempt, and can optionally send E-mail to an administrator notifying them of the incident. Using information from the log, the administrator can take action with the ISP of the hacker. In some types of intrusions, the firewall can fend off the hacker by discarding all further packets from the hacker’s IP address for a period of time.
B-10 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Stateful Packet Inspection
Unlike simple Internet sharing routers, a firewall uses a process called stateful packet inspection to ensure secure firewall filtering to protect your network from attacks and intrusions. Since user-level applications such as FTP and Web browsers can create complex patterns of network traffic, it is necessary for the firewall to analyze groups of network connection states. Using
Stateful Packet Inspection, an incoming packet is intercepted at the network layer and then analyzed for state-related information associated with all network connections. A central cache within the firewall keeps track of the state information associated with all network connections.
All traffic passing through the firewall is analyzed against the state of these connections in order to determine whether or not it will be allowed to pass through or rejected.
Denial of Service Attack
A hacker may be able to prevent your network from operating or communicating by launching a
Denial of Service (DoS) attack. The method used for such an attack can be as simple as merely flooding your site with more requests than it can handle. A more sophisticated attack may attempt to exploit some weakness in the operating system used by your router or gateway. Some operating systems can be disrupted by simply sending a packet with incorrect length information.
Ethernet Cabling
Although Ethernet networks originally used thick or thin coaxial cable, most installations currently use unshielded twisted pair (UTP) cabling. The UTP cable contains eight conductors, arranged in four twisted pairs, and terminated with an RJ45 type connector. A normal straight-through UTP
Ethernet cable follows the EIA568B standard wiring as described below in Table B-1 .
Pin
3
4
1
2
5
6
Table B-1.
Wire color
Orange/White
Orange
Green/White
Blue
Blue/White
Green
UTP Ethernet cable wiring, straight-through
Signal
Transmit (Tx) +
Transmit (Tx) -
Receive (Rx) +
Receive (Rx) -
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-11
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Table B-1.
Pin
7
8
UTP Ethernet cable wiring, straight-through (continued)
Signal Wire color
Brown/White
Brown
Category 5 Cable Quality
Category 5 distributed cable that meets ANSI/EIA/TIA-568-A building wiring standards can be a maximum of 328 feet (ft.) or 100 meters (m) in length, divided as follows:
20 ft. (6 m) between the hub and the patch panel (if used)
295 ft. (90 m) from the wiring closet to the wall outlet
10 ft. (3 m) from the wall outlet to the desktop device
The patch panel and other connecting hardware must meet the requirements for 100 Mbps operation (Category 5). Only 0.5 inch (1.5 cm) of untwist in the wire pair is allowed at any termination point.
A twisted pair Ethernet network operating at 10 Mbits/second (10BASE-T) will often tolerate low quality cables, but at 100 Mbits/second (10BASE-Tx) the cable must be rated as Category 5, or
Cat 5, by the Electronic Industry Association (EIA). This rating will be printed on the cable jacket.
A Category 5 cable will meet specified requirements regarding loss and crosstalk. In addition, there are restrictions on maximum cable length for both 10 and 100 Mbits/second networks.
Inside Twisted Pair Cables
For two devices to communicate, the transmitter of each device must be connected to the receiver of the other device. The crossover function is usually implemented internally as part of the circuitry in the device. Computers and workstation adapter cards are usually media-dependent interface ports, called MDI or uplink ports. Most repeaters and switch ports are configured as media-dependent interfaces with built-in crossover ports, called MDI-X or normal ports. Auto
Uplink technology automatically senses which connection, MDI or MDI-X, is needed and makes the right connection.
Figure B-4 illustrates straight-through twisted pair cable.
B-12 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Figure B-4: Straight-Through Twisted-Pair Cable
Figure B-5 illustrates crossover twisted pair cable.
Figure B-5: Crossover Twisted-Pair Cable
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-13
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Figure B-6: Category 5 UTP Cable with Male RJ-45 Plug at Each End
Note: Flat “silver satin” telephone cable may have the same RJ-45 plug. However, using telephone cable results in excessive collisions, causing the attached port to be partitioned or disconnected from the network.
Uplink Switches, Crossover Cables, and MDI/MDIX Switching
In the wiring table above, the concept of transmit and receive are from the perspective of the computer, which is wired as Media Dependant Interface (MDI). In this wiring, the computer transmits on pins 1 and 2. At the hub, the perspective is reversed, and the hub receives on pins 1 and 2. This wiring is referred to as Media Dependant Interface - Crossover (MDI-X).
When connecting a computer to a computer, or a hub port to another hub port, the transmit pair must be exchanged with the receive pair. This exchange is done by one of two mechanisms. Most hubs provide an Uplink switch which will exchange the pairs on one port, allowing that port to be connected to another hub using a normal Ethernet cable. The second method is to use a crossover cable, which is a special cable in which the transmit and receive pairs are exchanged at one of the two cable connectors. Crossover cables are often unmarked as such, and must be identified by comparing the two connectors. Since the cable connectors are clear plastic, it is easy to place them side by side and view the order of the wire colors on each. On a straight-through cable, the color order will be the same on both connectors. On a crossover cable, the orange and green pairs will be exchanged from one connector to the other.
B-14 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
The WGR614 v6 router incorporates Auto Uplink TM technology (also called MDI/MDIX). Each
LOCAL Ethernet port will automatically sense whether the Ethernet cable plugged into the port should have a normal connection (e.g. connecting to a computer) or an uplink connection (e.g. connecting to a router, switch, or hub). That port will then configure itself to the correct configuration. This feature also eliminates the need to worry about crossover cables, as Auto
Uplink TM will accommodate either type of cable to make the right connection.
Network, Routing, Firewall, and Basics
202-10099-01, April 2005
B-15
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
B-16 Network, Routing, Firewall, and Basics
202-10099-01, April 2005
Appendix C
Preparing Your Network
This appendix describes how to prepare your network to connect to the Internet through the 54
Mbps Wireless Router WGR614 v6 and how to verify the readiness of broadband Internet service from an Internet service provider (ISP).
Note: If an ISP technician configured your computer during the installation of a broadband modem, or if you configured it using instructions provided by your ISP, you may need to copy the current configuration information for use in the configuration of your router. Write down this information before reconfiguring your computers. Refer to
“Obtaining ISP Configuration Information for Windows Computers ” on page C-21
or
“Obtaining ISP Configuration Information for Macintosh Computers ” on page C-22
for further information.
What You Need To Use a Router with a Broadband Modem
You need to prepare these three things before you begin:
Cabling and Computer Hardware
To use the WGR614 v6 router on your network, each computer must have an 802.11g or 802.11b wireless adapter or an installed Ethernet Network Interface Card (NIC) and an Ethernet cable. If the computer will connect to your network using an Ethernet NIC at 100 Mbps, you must use a
Category 5 (Cat 5) cable such as the one provided with your router. For an explanation of Ethernet cabling, see
“Ethernet Cabling“ on page B-11 . The cable or DSL broadband modem must provide
a standard 10 Mbps (10BASE-T) or 100 Mbps (100BASE-Tx) Ethernet interface.
Computer Network Configuration Requirements
The WGR614 v6 includes a built-in Web Configuration Manager. To access the configuration menus on the WGR614 v6, your must use a Java-enabled Web browser program which supports
HTTP uploads such as Microsoft Internet Explorer or Netscape Navigator. Use Internet Explorer
5.0 and above and Netscape Navigator 4.7 and above.
Preparing Your Network C-1
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
For the initial setup of your router, you will need to connect a computer to the router. This computer has to be set to automatically get its TCP/IP configuration from the router via DHCP.
Note: For help with DHCP configuration, please use the Windows TCP/IP Configuration
Tutorials on the NETGEAR 54 Mbps Wireless Router WGR614 v6 Resource CD (230-10091-02), or in this appendix.
Internet Configuration Requirements
Depending on how your Internet service set up your account, you may need one or more of these configuration parameters to connect your router to the Internet:
• Host and Domain Names
• ISP Login Name and Password
• ISP Domain Name Server (DNS) Addresses
• Fixed IP Address which is also known as Static IP Address
Where Do I Get the Internet Configuration Parameters?
There are several ways you can gather the required Internet connection information.
• Your Internet service provides all the information needed to connect to the Internet. If you cannot locate this information, you can ask your Internet service to provide it or you can try one of the options below.
• If you have a computer already connected using the Internet, you can gather the configuration information from that computer.
— For Windows 95/98/ME, open the Network control panel, select the TCP/IP entry for the
Ethernet adapter, and click Properties. Record all the settings for each tab page.
— For Windows 2000/XP, open the Local Area Network Connection, select the TCP/IP entry for the Ethernet adapter, and click Properties. Record all the settings for each tab page.
— For Macintosh computers, record the settings in the TCP/IP or Network control panel.
• You may also refer to the NETGEAR 54 Mbps Wireless Router WGR614 v6 Resource CD
(230-10091-02) for the NETGEAR Router ISP Guide which provides Internet connection information for many ISPs.
Once you locate your Internet configuration parameters, you may want to record them on the page below.
C-2
202-10099-01, April 2005
Preparing Your Network
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Record Your Internet Connection Information
Print this page. Fill in the configuration parameters from your Internet Service Provider (ISP).
ISP Login Name: The login name and password are case sensitive and must be entered exactly as given by your ISP. Some ISPs use your full e-mail address as the login name. The Service Name is not required by all ISPs. If you connect using a login name and password, enter the following:
Login Name: ______________________________
Password: ____________________________
Service Name: _____________________________
Fixed or Static IP Address: If you have a static IP address, record the following information. For example, 169.254.141.148 could be a valid IP address.
Fixed or Static Internet IP Address: ______ ______ ______ ______
Gateway IP Address: ______ ______ ______ ______
Subnet Mask: ______ ______ ______ ______
ISP DNS Server Addresses: If you were given DNS server addresses, fill in the following:
Primary DNS Server IP Address: ______ ______ ______ ______
Secondary DNS Server IP Address: ______ ______ ______ ______
Host and Domain Names: Some ISPs use a specific host or domain name like CCA7324-A or home . If you haven’t been given host or domain names, you can use the following examples as a guide:
• If your main e-mail account with your ISP is [email protected]
, then use aaa as your host name.
Your ISP might call this your account, user, host, computer, or system name.
• If your ISP’s mail server is mail.xxx.yyy.com
, then use xxx.yyy.com
as the domain name.
ISP Host Name: _________________________ ISP Domain Name: _______________________
Preparing Your Computers for TCP/IP Networking
Computers access the Internet using a protocol called TCP/IP (Transmission Control Protocol/
Internet Protocol). Each computer on your network must have TCP/IP installed and selected as its networking protocol. If a Network Interface Card (NIC) is already installed in your computer, then
TCP/IP is probably already installed as well.
Most operating systems include the software components you need for networking with TCP/IP:
• Windows ® 95 or later includes the software components for establishing a TCP/IP network.
Preparing Your Network C-3
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Windows 3.1 does not include a TCP/IP component. You need to purchase a third-party TCP/
IP application package such as NetManage Chameleon.
• Macintosh Operating System 7 or later includes the software components for establishing a
TCP/IP network.
• All versions of UNIX or Linux include TCP/IP components. Follow the instructions provided with your operating system or networking software to install TCP/IP on your computer.
In your IP network, each computer and the router must be assigned a unique IP addresses. Each computer must also have certain other IP configuration information such as a subnet mask
(netmask), a domain name server (DNS) address, and a default gateway address. In most cases, you should install TCP/IP so that the computer obtains its specific network configuration information automatically from a DHCP server during bootup. For a detailed explanation of the
meaning and purpose of these configuration items, refer to “ Appendix B, “Network, Routing,
.”
The WGR614 v6 router is shipped preconfigured as a DHCP server. The router assigns the following TCP/IP configuration information automatically when the PCs are rebooted:
• PC or workstation IP addresses—192.168.1.2 through 192.168.1.254
• Subnet mask—255.255.255.0
• Gateway address (the router)—192.168.1.1
These addresses are part of the IETF-designated private address range for use in private networks.
Configuring Windows 95, 98, and Me for TCP/IP Networking
As part of the PC preparation process, you need to manually install and configure TCP/IP on each networked PC. Before starting, locate your Windows CD; you may need to insert it during the
TCP/IP installation process.
Install or Verify Windows Networking Components
To install or verify the necessary components for IP networking:
1.
On the Windows taskbar, click the Start button, point to Settings, and then click Control Panel.
2.
Double-click the Network icon.
The Network window opens, which displays a list of installed components:
C-4 Preparing Your Network
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
You must have an Ethernet adapter, the TCP/IP protocol, and Client for Microsoft Networks.
Note: It is not necessary to remove any other network components shown in the
Network window in order to install the adapter, TCP/IP, or Client for Microsoft
Networks.
If you need to install a new adapter, follow these steps: a.
Click the Add button.
b.
c.
Select Adapter, and then click Add.
Select the manufacturer and model of your Ethernet adapter, and then click OK.
If you need TCP/IP: a.
Click the Add button.
b.
c.
d.
Select Protocol, and then click Add.
Select Microsoft.
Select TCP/IP, and then click OK.
Preparing Your Network C-5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
3.
If you need Client for Microsoft Networks: a.
Click the Add button.
b.
c.
Select Client, and then click Add.
Select Microsoft.
d.
Select Client for Microsoft Networks, and then click OK.
Restart your PC for the changes to take effect.
Enabling DHCP to Automatically Configure TCP/IP Settings in
Windows 95B, 98, and Me
After the TCP/IP protocol components are installed, each PC must be assigned specific information about itself and resources that are available on its network. The simplest way to configure this information is to allow the PC to obtain the information from a DHCP server in the network.
You will find there are many similarities in the procedures for different Windows systems when using DHCP to configure TCP/IP.
The following steps will walk you through the configuration process for each of these versions of Windows.
Locate your Network Neighborhood icon.
• If the Network Neighborhood icon is on the Windows desktop, position your mouse pointer over it and right-click your mouse button.
• If the icon is not on the desktop,
• Click Start on the task bar located at the bottom left of the window.
• Choose Settings, and then Control Panel.
• Locate the Network Neighborhood icon and click on it. This will open the Network panel as shown below.
C-6 Preparing Your Network
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Verify the following settings as shown:
• Client for Microsoft Network exists
• Ethernet adapter is present
• TCP/IP is present
• Primary Network Logon is set to
Windows logon
Click on the Properties button. The following TCP/IP Properties window will display.
Preparing Your Network
202-10099-01, April 2005
C-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• By default, the IP Address tab is open on this window.
• Verify the following:
Obtain an IP address automatically is selected. If not selected, click in the radio button to the left of it to select it. This setting is required to enable the DHCP server to automatically assign an IP address.
• Click OK to continue.
Restart the PC.
Repeat these steps for each PC with this version of Windows on your network.
Selecting Windows’ Internet Access Method
4.
5.
6.
1.
2.
3.
On the Windows taskbar, click the Start button, point to Settings, and then click Control Panel.
Double-click the Internet Options icon.
Select “I want to set up my Internet connection manually” or “I want to connect through a
Local Area Network” and click Next.
Select “I want to connect through a Local Area Network” and click Next.
Uncheck all boxes in the LAN Internet Configuration screen and click Next.
Proceed to the end of the Wizard.
Verifying TCP/IP Properties
After your PC is configured and has rebooted, you can check the TCP/IP configuration using the utility winipcfg.exe:
1.
On the Windows taskbar, click the Start button, and then click Run.
C-8 Preparing Your Network
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
2.
3.
Type winipcfg
, and then click OK.
The IP Configuration window opens, which lists (among other things), your IP address, subnet mask, and default gateway.
From the drop-down box, select your Ethernet adapter.
The window is updated to show your settings, which should match the values below if you are using the default TCP/IP settings that NETGEAR recommends for connecting through a router or gateway:
• The IP address is between 192.168.1.2 and 192.168.1.254
• The subnet mask is 255.255.255.0
• The default gateway is 192.168.1.1
Configuring Windows NT4, 2000 or XP for IP Networking
As part of the PC preparation process, you may need to install and configure
TCP/IP on each networked PC. Before starting, locate your Windows CD; you may need to insert it during the TCP/IP installation process.
Install or Verify Windows Networking Components
2.
3.
To install or verify the necessary components for IP networking:
1.
On the Windows taskbar, click the Start button, point to Settings, and then click Control Panel.
Double-click the Network and Dialup Connections icon.
If an Ethernet adapter is present in your PC, you should see an entry for Local Area
Connection. Double-click that entry.
4.
5.
Select Properties.
Verify that ‘Client for Microsoft Networks’ and ‘Internet Protocol (TCP/IP)’ are present. If not, select Install and add them.
6.
7.
8.
Select ‘Internet Protocol (TCP/IP)’, click Properties, and verify that “Obtain an IP address automatically is selected.
Click OK and close all Network and Dialup Connections windows.
Then, restart your PC.
Preparing Your Network C-9
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
DHCP Configuration of TCP/IP in Windows XP, 2000, or NT4
You will find there are many similarities in the procedures for different Windows systems when using DHCP to configure TCP/IP.
The following steps will walk you through the configuration process for each of these versions of
Windows.
DHCP Configuration of TCP/IP in Windows XP
Locate your Network Neighborhood icon.
• Select Control Panel from the Windows XP new Start Menu.
• Select the Network Connections icon on the Control Panel. This will take you to the next step.
• Now the Network Connection window displays.
The Connections List that shows all the network connections set up on the PC, located to the right of the window.
• Right-click on the Connection you will use and choose Status.
C-10
202-10099-01, April 2005
Preparing Your Network
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Now you should be at the Local Area
Network Connection Status window. This box displays the connection status, duration, speed, and activity statistics.
• Administrator logon access rights are needed to use this window.
• Click the Properties button to view details about the connection.
• The TCP/IP details are presented on the
Support tab page.
• Select Internet Protocol, and click
Properties to view the configuration information.
Preparing Your Network
202-10099-01, April 2005
C-11
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Verify that the Obtain an IP address
automatically radio button is selected.
• Verify that Obtain DNS server address
automatically radio button is selected.
• Click the OK button.
This completes the DHCP configuration of TCP/
IP in Windows XP.
Repeat these steps for each PC with this version of Windows on your network.
DHCP Configuration of TCP/IP in Windows 2000
Once again, after you have installed the network card, TCP/IP for Windows 2000 is configured.
TCP/IP should be added by default and set to DHCP without your having to configure it.
However, if there are problems, follow these steps to configure TCP/IP with DHCP for Windows
2000.
C-12
202-10099-01, April 2005
Preparing Your Network
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Click on the My Network Places icon on the Windows desktop. This will bring up a window called Network and Dial-up Connections.
• Right click on Local Area Connection and select Properties.
• The Local Area Connection Properties dialog box appears.
• Verify that you have the correct Ethernet card selected in the Connect using: box.
• Verify that at least the following two items are displayed and selected in the box of
“Components checked are used by this connection:”
• Client for Microsoft Networks and
• Internet Protocol (TCP/IP)
• Click OK.
Preparing Your Network
202-10099-01, April 2005
C-13
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• With Internet Protocol (TCP/IP) selected, click on Properties to open the Internet
Protocol (TCP/IP) Properties dialogue box.
• Verify that
• Obtain an IP address automatically is selected.
• Obtain DNS server address
automatically is selected.
• Click OK to return to Local Area
Connection Properties.
• Click OK again to complete the configuration process for Windows 2000.
Restart the PC.
Repeat these steps for each PC with this version of Windows on your network.
C-14
202-10099-01, April 2005
Preparing Your Network
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
DHCP Configuration of TCP/IP in Windows NT4
Once you have installed the network card, you need to configure the TCP/IP environment for
Windows NT 4.0. Follow this procedure to configure TCP/IP with DHCP in Windows NT 4.0.
• Choose Settings from the Start Menu, and then select Control Panel.
This will display Control Panel window.
• Double-click the Network icon in the
Control Panel window.
The Network panel will display.
• Select the Protocols tab to continue.
Preparing Your Network
202-10099-01, April 2005
C-15
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Highlight the TCP/IP Protocol in the
Network Protocols box, and click on the
Properties button.
C-16
202-10099-01, April 2005
Preparing Your Network
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• The TCP/IP Properties dialog box now displays.
• Click the IP Address tab.
• Select the radio button marked Obtain an IP address from a DHCP server.
• Click OK. This completes the configuration of TCP/IP in Windows NT.
Restart the PC.
Repeat these steps for each PC with this version of Windows on your network.
Verifying TCP/IP Properties for Windows XP, 2000, and NT4
To check your PC’s TCP/IP configuration:
1.
On the Windows taskbar, click the Start button, and then click Run.
The Run window opens.
2.
3.
Type cmd
and then click OK.
A command window opens
Type
ipconfig /all
Your IP Configuration information will be listed, and should match the values below if you are using the default TCP/IP settings that NETGEAR recommends for connecting through a router or gateway:
• The IP address is between 192.168.1.2 and 192.168.1.254
• The subnet mask is 255.255.255.0
Preparing Your Network C-17
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
4.
• The default gateway is 192.168.1.1
Type
exit
Configuring the Macintosh for TCP/IP Networking
Beginning with Macintosh Operating System 7, TCP/IP is already installed on the Macintosh. On each networked Macintosh, you will need to configure TCP/IP to use DHCP.
MacOS 8.6 or 9.x
1.
From the Apple menu, select Control Panels, then TCP/IP.
The TCP/IP Control Panel opens:
2.
3.
4.
5.
From the “Connect via” box, select your Macintosh’s Ethernet interface.
From the “Configure” box, select Using DHCP Server.
You can leave the DHCP Client ID box empty.
Close the TCP/IP Control Panel.
Repeat this for each Macintosh on your network.
MacOS X
1.
From the Apple menu, choose System Preferences, then Network.
C-18
202-10099-01, April 2005
Preparing Your Network
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
2.
3.
4.
If not already selected, select Built-in Ethernet in the Configure list.
If not already selected, Select Using DHCP in the TCP/IP tab.
Click Save.
Verifying TCP/IP Properties for Macintosh Computers
After your Macintosh is configured and has rebooted, you can check the TCP/IP configuration by returning to the TCP/IP Control Panel. From the Apple menu, select Control Panels, then TCP/IP.
The panel is updated to show your settings, which should match the values below if you are using the default TCP/IP settings that NETGEAR recommends:
• The IP Address is between 192.168.1.2 and 192.16810.254
• The Subnet mask is 255.255.255.0
• The Router address is 192.168.1.1
If you do not see these values, you may need to restart your Macintosh or you may need to switch the “Configure” setting to a different option, then back again to “Using DHCP Server”.
Preparing Your Network
202-10099-01, April 2005
C-19
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Verifying the Readiness of Your Internet Account
For broadband access to the Internet, you need to contract with an Internet service provider (ISP) for a single-user Internet access account using a cable modem or DSL modem. This modem must be a separate physical box (not a card) and must provide an Ethernet port intended for connection to a Network Interface Card (NIC) in a computer. Your router does not support a USB-connected broadband modem.
For a single-user Internet account, your ISP supplies TCP/IP configuration information for one computer. With a typical account, much of the configuration information is dynamically assigned when your PC is first booted up while connected to the ISP, and you will not need to know that dynamic information.
In order to share the Internet connection among several computers, your router takes the place of the single PC, and you need to configure it with the TCP/IP information that the single PC would normally use. When the router’s Internet port is connected to the broadband modem, the router appears to be a single PC to the ISP. The router then allows the PCs on the local network to masquerade as the single PC to access the Internet through the broadband modem. The method used by the router to accomplish this is called Network Address Translation (NAT) or IP masquerading.
Are Login Protocols Used?
Some ISPs require a special login protocol, in which you must enter a login name and password in order to access the Internet. If you normally log in to your Internet account by running a program such as WinPOET or EnterNet, then your account uses PPP over Ethernet (PPPoE).
When you configure your router, you will need to enter your login name and password in the router’s configuration menus. After your network and router are configured, the router will perform the login task when needed, and you will no longer need to run the login program from your PC. It is not necessary to uninstall the login program.
What Is Your Configuration Information?
More and more, ISPs are dynamically assigning configuration information. However, if your ISP does not dynamically assign configuration information but instead used fixed configurations, your
ISP should have given you the following basic information for your account:
C-20 Preparing Your Network
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• An IP address and subnet mask
• A gateway IP address, which is the address of the ISP’s router
• One or more domain name server (DNS) IP addresses
• Host name and domain suffix
For example, your account’s full server names may look like this: mail.xxx.yyy.com
In this example, the domain suffix is xxx.yyy.com
.
If any of these items are dynamically supplied by the ISP, your router automatically acquires them.
If an ISP technician configured your PC during the installation of the broadband modem, or if you configured it using instructions provided by your ISP, you need to copy the configuration information from your PC’s Network TCP/IP Properties window or Macintosh TCP/IP Control
Panel before reconfiguring your PC for use with the router. These procedures are described next.
Obtaining ISP Configuration Information for Windows Computers
As mentioned above, you may need to collect configuration information from your PC so that you can use this information when you configure the WGR614 v6 router. Following this procedure is only necessary when your ISP does not dynamically supply the account information.
To get the information you need to configure the router for Internet access:
1.
On the Windows taskbar, click the Start button, point to Settings, and then click Control Panel.
2.
3.
4.
5.
Double-click the Network icon.
The Network window opens, which displays a list of installed components.
Select TCP/IP, and then click Properties.
The TCP/IP Properties dialog box opens.
Select the IP Address tab.
If an IP address and subnet mask are shown, write down the information. If an address is present, your account uses a fixed (static) IP address. If no address is present, your account uses a dynamically-assigned IP address. Click “Obtain an IP address automatically”.
Select the Gateway tab.
Preparing Your Network C-21
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
8.
9.
6.
7.
If an IP address appears under Installed Gateways, write down the address. This is the ISP’s gateway address. Select the address and then click Remove to remove the gateway address.
Select the DNS Configuration tab.
If any DNS server addresses are shown, write down the addresses. If any information appears in the Host or Domain information box, write it down. Click Disable DNS.
Click OK to save your changes and close the TCP/IP Properties dialog box.
You are returned to the Network window.
Click OK.
Reboot your PC at the prompt. You may also be prompted to insert your Windows CD.
Obtaining ISP Configuration Information for Macintosh
Computers
As mentioned above, you may need to collect configuration information from your Macintosh so that you can use this information when you configure the WGR614 v6 router. Following this procedure is only necessary when your ISP does not dynamically supply the account information.
To get the information you need to configure the router for Internet access:
1.
From the Apple menu, select Control Panels, then TCP/IP.
2.
3.
The TCP/IP Control Panel opens, which displays a list of configuration settings. If the
“Configure” setting is “Using DHCP Server”, your account uses a dynamically-assigned IP address. In this case, close the Control Panel and skip the rest of this section.
If an IP address and subnet mask are shown, write down the information.
If an IP address appears under Router address, write down the address. This is the ISP’s gateway address.
4.
5.
6.
7.
If any Name Server addresses are shown, write down the addresses. These are your ISP’s DNS addresses.
If any information appears in the Search domains information box, write it down.
Change the “Configure” setting to “Using DHCP Server”.
Close the TCP/IP Control Panel.
C-22 Preparing Your Network
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Restarting the Network
Once you’ve set up your computers to work with the router, you must reset the network for the devices to be able to communicate correctly. Restart any computer that is connected to the firewall.
After configuring all of your computers for TCP/IP networking and restarting them, and connecting them to the local network of your WGR614 v6 router, you are ready to access and configure the router.
Preparing Your Network
202-10099-01, April 2005
C-23
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
C-24
202-10099-01, April 2005
Preparing Your Network
Appendix D
Wireless Networking Basics
This chapter provides an overview of Wireless networking.
Wireless Networking Overview
The WGR614 v6 router conforms to the Institute of Electrical and Electronics Engineers (IEEE)
802.11b and 802.11g standards for wireless LANs (WLANs). On an 802.11b or g wireless link, data is encoded using direct-sequence spread-spectrum (DSSS) technology and is transmitted in the unlicensed radio spectrum at 2.5GHz. The maximum data rate for the 802.11b wireless link is
11 Mbps, but it will automatically back down from 11 Mbps to 5.5, 2, and 1 Mbps when the radio signal is weak or when interference is detected. The 802.11g auto rate sensing rates are 1, 2, 5.5, 6,
9, 12, 18, 24, 36, 48, and 54 Mbps.
The 802.11 standard is also called Wireless Ethernet or Wi-Fi by the Wireless Ethernet
Compatibility Alliance (WECA, see http://www.wi-fi.net
), an industry standard group promoting interoperability among 802.11 devices. The 802.11 standard offers two methods for configuring a wireless network - ad hoc and infrastructure.
Infrastructure Mode
With a wireless Access Point, you can operate the wireless LAN in the infrastructure mode. This mode provides wireless connectivity to multiple wireless network devices within a fixed range or area of coverage, interacting with wireless nodes via an antenna.
In the infrastructure mode, the wireless access point converts airwave data into wired Ethernet data, acting as a bridge between the wired LAN and wireless clients. Connecting multiple Access
Points via a wired Ethernet backbone can further extend the wireless network coverage. As a mobile computing device moves out of the range of one access point, it moves into the range of another. As a result, wireless clients can freely roam from one Access Point domain to another and still maintain seamless network connection.
Wireless Networking Basics
202-10099-01, April 2005
D-1
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Ad Hoc Mode (Peer-to-Peer Workgroup)
In an ad hoc network, computers are brought together as needed; thus, there is no structure or fixed points to the network - each node can generally communicate with any other node. There is no
Access Point involved in this configuration. This mode enables you to quickly set up a small wireless workgroup and allows workgroup members to exchange data or share printers as supported by Microsoft networking in the various Windows operating systems. Some vendors also refer to ad hoc networking as peer-to-peer group networking.
In this configuration, network packets are directly sent and received by the intended transmitting and receiving stations. As long as the stations are within range of one another, this is the easiest and least expensive way to set up a wireless network.
Network Name: Extended Service Set Identification (ESSID)
The Extended Service Set Identification (ESSID) is one of two types of Service Set Identification
(SSID). In an ad hoc wireless network with no access points, the Basic Service Set Identification
(BSSID) is used. In an infrastructure wireless network that includes an access point, the ESSID is used, but may still be referred to as SSID.
An SSID is a thirty-two character (maximum) alphanumeric key identifying the name of the wireless local area network. Some vendors refer to the SSID as network name. For the wireless devices in a network to communicate with each other, all devices must be configured with the same SSID.
The ESSID is usually broadcast in the air from an access point. The wireless station sometimes can be configured with the ESSID ANY. This means the wireless station will try to associate with whichever access point has the stronger radio frequency (RF) signal, providing that both the access point and wireless station use Open System authentication.
Authentication and WEP Data Encryption
The absence of a physical connection between nodes makes the wireless links vulnerable to eavesdropping and information theft. To provide a certain level of security, the IEEE 802.11 standard has defined these two types of authentication methods:
• Open System. With Open System authentication, a wireless computer can join any network and receive any messages that are not encrypted.
D-2 Wireless Networking Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
• Shared Key. With Shared Key authentication, only those PCs that possess the correct authentication key can join the network. By default, IEEE 802.11 wireless devices operate in an Open System network.
Wired Equivalent Privacy (WEP) data encryption is used when the wireless devices are configured to operate in Shared Key authentication mode.
802.11 Authentication
The 802.11 standard defines several services that govern how two 802.11 devices communicate.
The following events must occur before an 802.11 Station can communicate with an Ethernet network through an access point, such as the one built in to the WGR614 v6:
1.
Turn on the wireless station.
2.
3.
4.
The station listens for messages from any access points that are in range.
The station finds a message from an access point that has a matching SSID.
The station sends an authentication request to the access point.
5.
6.
7.
8.
The access point authenticates the station.
The station sends an association request to the access point.
The access point associates with the station.
The station can now communicate with the Ethernet network through the access point.
An access point must authenticate a station before the station can associate with the access point or communicate with the network. The IEEE 802.11 standard defines two types of authentication:
Open System and Shared Key.
• Open System Authentication allows any device to join the network, assuming that the device
SSID matches the access point SSID. Alternatively, the device can use the “ANY” SSID option to associate with any available Access Point within range, regardless of its SSID.
• Shared Key Authentication requires that the station and the access point have the same WEP
Key to authenticate. These two authentication procedures are described below.
Open System Authentication
The following steps occur when two devices use Open System Authentication:
1.
The station sends an authentication request to the access point.
Wireless Networking Basics D-3
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
2.
3.
The access point authenticates the station.
The station associates with the access point and joins the network.
This process is illustrated below.
802.11b Authentication
Open System Steps
1) Authentication request sent to AP
2) AP authenticates
Client attempting to connect
3) Client connects to network
Access Point
Cable/DSL
ProSafe Wireless VPN Security Firewall
PWR TEST
I N TER N ET
LNK
ACT
W LA N
Enable
1 2
LO C A L
3 4 5 6 7
100
8
LNK/ACT
MODEL FVM318
Cable or
DLS modem
Figure 7-1: Open system authentication
Shared Key Authentication
The following steps occur when two devices use Shared Key Authentication:
1.
The station sends an authentication request to the access point.
2.
3.
The access point sends challenge text to the station.
The station uses its configured 64-bit or 128-bit default key to encrypt the challenge text, and sends the encrypted text to the access point.
4.
5.
The access point decrypts the encrypted text using its configured WEP Key that corresponds to the station’s default key. The access point compares the decrypted text with the original challenge text. If the decrypted text matches the original challenge text, then the access point and the station share the same WEP Key and the access point authenticates the station.
The station connects to the network.
If the decrypted text does not match the original challenge text (the access point and station do not share the same WEP Key), then the access point will refuse to authenticate the station and the station will be unable to communicate with either the 802.11 network or Ethernet network.
D-4
202-10099-01, April 2005
Wireless Networking Basics
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
This process is illustrated below.
802.11b Authentication
Shared Key Steps
1) Authentication request sent to AP
2) AP sends challenge text
Client attempting to connect
3) Client encrypts challenge text and sends it back to AP
4) AP decrypts, and if correct, authenticates client
5) Client connects to network
Access Point
Cable/DSL ProSafe Wireless VPN Security Firewall
PWR TEST
I N TER N ET
LNK
ACT
W LA N
Enable
1 2
LO C A L
3 4 5 6 7
100
8
LNK/ACT
MODEL FVM318
Cable or
DLS modem
Figure 7-2: Shared key authentication
Overview of WEP Parameters
Before enabling WEP on an 802.11 network, you must first consider what type of encryption you require and the key size you want to use. Typically, there are three WEP Encryption options available for 802.11 products:
1. Do Not Use WEP: The 802.11 network does not encrypt data. For authentication purposes, the network uses Open System Authentication.
2. Use WEP for Encryption: A transmitting 802.11 device encrypts the data portion of every packet it sends using a configured WEP Key. The receiving device decrypts the data using the same WEP Key. For authentication purposes, the network uses Open System Authentication.
3. Use WEP for Authentication and Encryption: A transmitting 802.11 device encrypts the data portion of every packet it sends using a configured WEP Key. The receiving device decrypts the data using the same WEP Key. For authentication purposes, the wireless network uses Shared Key
Authentication.
Note: Some 802.11 access points also support Use WEP for Authentication Only (Shared Key
Authentication without data encryption).
Wireless Networking Basics D-5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Key Size
The IEEE 802.11 standard supports two types of WEP encryption: 40-bit and 128-bit.
The 64-bit WEP data encryption method allows for a five-character (40-bit) input. Additionally, 24 factory-set bits are added to the forty-bit input to generate a 64-bit encryption key. The 24 factory-set bits are not user-configurable). This encryption key will be used to encrypt/decrypt all data transmitted via the wireless interface. Some vendors refer to the 64-bit WEP data encryption as 40-bit WEP data encryption since the user-configurable portion of the encryption key is 40 bits wide.
The 128-bit WEP data encryption method consists of 104 user-configurable bits. Similar to the forty-bit WEP data encryption method, the remaining 24 bits are factory set and not user configurable. Some vendors allow passphrases to be entered instead of the cryptic hexadecimal characters to ease encryption key entry.
128-bit encryption is stronger than 40-bit encryption, but 128-bit encryption may not be available outside of the United States due to U.S. export regulations.
When configured for 40-bit encryption, 802.11 products typically support up to four WEP Keys.
Each 40-bit WEP Key is expressed as 5 sets of two hexadecimal digits (0-9 and A-F). For example, “12 34 56 78 90” is a 40-bit WEP Key.
When configured for 128-bit encryption, 802.11 products typically support four WEP Keys but some manufacturers support only one 128-bit key. The 128-bit WEP Key is expressed as 13 sets of two hexadecimal digits (0-9 and A-F). For example, “12 34 56 78 90 AB CD EF 12 34 56 78 90” is a 128-bit WEP Key.
Table D-1: Encryption Key Sizes
Encryption Key Size # of Hexadecimal Digits Example of Hexadecimal Key Content
64-bit (24+40) 10 4C72F08AE1
128-bit (24+104) 26 4C72F08AE19D57A3FF6B260037
Note: Typically, 802.11 access points can store up to four 128-bit WEP Keys but some 802.11 client adapters can only store one. Therefore, make sure that your 802.11 access and client adapters’ configurations match.
D-6
202-10099-01, April 2005
Wireless Networking Basics
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
WEP Configuration Options
The WEP settings must match on all 802.11 devices that are within the same wireless network as identified by the SSID. In general, if your mobile clients will roam between access points, then all of the 802.11 access points and all of the 802.11 client adapters on the network must have the same
WEP settings.
Note: Whatever keys you enter for an AP, you must also enter the same keys for the client adapter in the same order. In other words, WEP key 1 on the AP must match WEP key 1 on the client adapter, WEP key 2 on the AP must match WEP key 2 on the client adapter, and so on.
Note: The AP and the client adapters can have different default WEP Keys as long as the keys are in the same order. In other words, the AP can use WEP key 2 as its default key to transmit while a client adapter can use WEP key 3 as its default key to transmit. The two devices will communicate as long as the AP’s WEP key 2 is the same as the client’s WEP key 2 and the AP’s WEP key 3 is the same as the client’s WEP key 3.
Wireless Channels
The wireless frequencies used by 802.11b/g networks are discussed below.
IEEE 802.11b/g wireless nodes communicate with each other using radio frequency signals in the
ISM (Industrial, Scientific, and Medical) band between 2.4 GHz and 2.5 GHz. Neighboring channels are 5 MHz apart. However, due to spread spectrum effect of the signals, a node sending signals using a particular channel will utilize frequency spectrum 12.5 MHz above and below the center channel frequency. As a result, two separate wireless networks using neighboring channels
(for example, channel 1 and channel 2) in the same general vicinity will interfere with each other.
Applying two channels that allow the maximum channel separation will decrease the amount of channel cross-talk, and provide a noticeable performance increase over networks with minimal channel separation.
The radio frequency channels used in 802.11b/g networks are listed in Table D-2 :
Table D-2: 802.11b/g Radio Frequency Channels
Channel Center Frequency
1
2
3
2412 MHz
2417 MHz
2422 MHz
Frequency Spread
2399.5 MHz - 2424.5 MHz
2404.5 MHz - 2429.5 MHz
2409.5 MHz - 2434.5 MHz
Wireless Networking Basics D-7
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Table D-2: 802.11b/g Radio Frequency Channels
Channel Center Frequency
8
9
10
11
6
7
4
5
12
13
2427 MHz
2432 MHz
2437 MHz
2442 MHz
2447 MHz
2452 MHz
2457 MHz
2462 MHz
2467 MHz
2472 MHz
Frequency Spread
2414.5 MHz - 2439.5 MHz
2419.5 MHz - 2444.5 MHz
2424.5 MHz - 2449.5 MHz
2429.5 MHz - 2454.5 MHz
2434.5 MHz - 2459.5 MHz
2439.5 MHz - 2464.5 MHz
2444.5 MHz - 2469.5 MHz
2449.5 MHz - 2474.5 MHz
2454.5 MHz - 2479.5 MHz
2459.5 MHz - 2484.5 MHz
Note: The available channels supported by the wireless products in various countries are different.
For example, Channels 1 to 11 are supported in the U.S. and Canada, and Channels 1 to 13 are supported in Europe and Australia.
The preferred channel separation between the channels in neighboring wireless networks is 25
MHz (5 channels). This means that you can apply up to three different channels within your wireless network. There are only 11 usable wireless channels in the United States. It is recommended that you start using channel 1 and grow to use channel 6, and 11 when necessary, as these three channels do not overlap.
WPA and WPA2 Wireless Security
Wi-Fi Protected Access (WPA and WPA2) is a specification of standards-based, interoperable security enhancements that increase the level of data protection and access control for existing and future wireless LAN systems.
The IEEE introduced the WEP as an optional security measure to secure 802.11b (Wi-Fi) WLANs, but inherent weaknesses in the standard soon became obvious. In response to this situation, the
Wi-Fi Alliance announced a new security architecture in October 2002 that remedies the shortcomings of WEP. This standard, formerly known as Safe Secure Network (SSN), is designed to work with existing 802.11 products and offers forward compatibility with 802.11i, the new wireless security architecture that has been defined by the IEEE.
D-8 Wireless Networking Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
WPA and WPA2 offer the following benefits:
• Enhanced data privacy
• Robust key management
• Data origin authentication
• Data integrity protection
The Wi-Fi Alliance is now performing interoperability certification testing on Wi-Fi Protected
Access products. Starting August of 2003, all new Wi-Fi certified products have to support WPA.
NETGEAR is implementing WPA and WPA2 on client and access point products. The 802.11i standard was ratified in 2004.
How Does WPA Compare to WEP?
WEP is a data encryption method and is not intended as a user authentication mechanism. WPA user authentication is implemented using 802.1x and the Extensible Authentication Protocol
(EAP). Support for 802.1x authentication is required in WPA. In the 802.11 standard, 802.1x authentication was optional. For details on EAP specifically, refer to IETF's RFC 2284.
With 802.11 WEP, all access points and client wireless adapters on a particular wireless LAN must use the same encryption key. A major problem with the 802.11 standard is that the keys are cumbersome to change. If you do not update the WEP keys often, an unauthorized person with a sniffing tool can monitor your network for less than a day and decode the encrypted messages.
Products based on the 802.11 standard alone offer system administrators no effective method to update the keys.
For 802.11, WEP encryption is optional. For WPA, encryption using Temporal Key Integrity
Protocol (TKIP) is required. TKIP replaces WEP with a new encryption algorithm that is stronger than the WEP algorithm, but that uses the calculation facilities present on existing wireless devices to perform encryption operations. TKIP provides important data encryption enhancements including a per-packet key mixing function, a message integrity check (MIC) named Michael, an extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. Through these enhancements, TKIP addresses most of the known WEP vulnerabilities.
Wireless Networking Basics
202-10099-01, April 2005
D-9
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
How Does WPA Compare to WPA2 (IEEE 802.11i)?
WPA is forward compatible with the WPA2 security specification. WPA is a subset of WPA2 and used certain pieces of the early 802.11i draft, such as 802.1x and TKIP. The main pieces of WPA2 that are not included in WPA are secure IBSS (Ad-Hoc mode), secure fast handoff (for specialized
802.11 VoIP phones), as well as enhanced encryption protocols, such as AES-CCMP. These features were either not yet ready for market or required hardware upgrades to implement.
What are the Key Features of WPA and WPA2 Security?
The following security features are included in the WPA and WPA2 standard:
• WPA and WPA2 Authentication
• WPA and WPA2 Encryption Key Management
– Temporal Key Integrity Protocol (TKIP)
– Michael message integrity code (MIC)
– AES support (WPA2, requires hardware support)
• Support for a mixture of WPA, WPA2, and WEP wireless clients to allow a migration strategy, but mixing WEP and WPA/WPA2 is discouraged
These features are discussed below.
WPA/WPA2 addresses most of the known WEP vulnerabilities and is primarily intended for wireless infrastructure networks as found in the enterprise. This infrastructure includes stations, access points, and authentication servers (typically RADIUS servers). The RADIUS server holds
(or has access to) user credentials (for example, user names and passwords) and authenticates wireless users before they gain access to the network.
The strength of WPA/WPA2 comes from an integrated sequence of operations that encompass
802.1X/EAP authentication and sophisticated key management and encryption techniques. Its major operations include:
• Network security capability determination. This occurs at the 802.11 level and is communicated through WPA information elements in Beacon, Probe Response, and (Re)
Association Requests. Information in these elements includes the authentication method
(802.1X or Pre-shared key) and the preferred cipher suite (WEP, TKIP, or AES).
D-10
202-10099-01, April 2005
Wireless Networking Basics
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
The primary information conveyed in the Beacon frames is the authentication method and the cipher suite. Possible authentication methods include 802.1X and Pre-shared key. Pre-shared key is an authentication method that uses a statically configured pass phrase on both the stations and the access point. This obviates the need for an authentication server, which in many home and small office environments will not be available nor desirable. Possible cipher suites include: WEP, TKIP, and AES (Advanced Encryption Standard). We talk more about
TKIP and AES when addressing data privacy below.
• Authentication. EAP over 802.1X is used for authentication. Mutual authentication is gained by choosing an EAP type supporting this feature and is required by WPA. 802.1X port access control prevents full access to the network until authentication completes. 802.1X
EAPOL-Key packets are used by WPA to distribute per-session keys to those stations successfully authenticated.
The supplicant in the station uses the authentication and cipher suite information contained in the information elements to decide which authentication method and cipher suite to use. For example, if the access point is using the pre-shared key method then the supplicant need not authenticate using full-blown 802.1X. Rather, the supplicant must simply prove to the access point that it is in possession of the pre-shared key. If the supplicant detects that the service set does not contain a WPA information element then it knows it must use pre-WPA 802.1X authentication and key management in order to access the network.
• Key management. WPA/WPA2 features a robust key generation/management system that integrates the authentication and data privacy functions. Keys are generated after successful authentication and through a subsequent 4-way handshake between the station and Access
Point (AP).
• Data Privacy (Encryption). Temporal Key Integrity Protocol (TKIP) is used to wrap WEP in sophisticated cryptographic and security techniques to overcome most of its weaknesses.
• Data integrity. TKIP includes a message integrity code (MIC) at the end of each plaintext message to ensure messages are not being spoofed.
Wireless Networking Basics
202-10099-01, April 2005
D-11
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
WPA/WPA2 Authentication: Enterprise-level User
Authentication via 802.1x/EAP and RADIUS
Wireless LAN
WPA/WPA2 enabled wireless client with
“supplicant”
WPA/WPA2 enabled
Access Point using pre-shared key
or 802.1x
Wired Network with Optional
802.1x Port Based Network
Access Control
TCP/IP
Ports Closed
Until
Authenticated
RADIUS Server
TCP/IP
Ports Opened
After
Authenticated
Login
Authentication
Certificate
Authority
(for example
Win Server,
VeriSign)
Figure 4-3: WPA/WPA2 Overview
IEEE 802.1x offers an effective framework for authenticating and controlling user traffic to a protected network, as well as providing a vehicle for dynamically varying data encryption keys via
EAP from a RADIUS server, for example. This framework enables using a central authentication server, which employs mutual authentication so that a rogue wireless user does not join the network.
It is important to note that 802.1x does not provide the actual authentication mechanisms. When using 802.1x, the EAP type, such as Transport Layer Security (EAP-TLS), or EAP Tunneled
Transport Layer Security (EAP-TTLS), defines how the authentication takes place.
Note: For environments with a Remote Authentication Dial-In User Service (RADIUS) infrastructure, WPA supports Extensible Authentication Protocol (EAP). For environments without a RADIUS infrastructure, WPA supports the use of a pre-shared key.
Together, these technologies provide a framework for strong user authentication.
Windows XP implements 802.1x natively, and several NETGEAR switch and wireless access point products support 802.1x.
D-12
202-10099-01, April 2005
Wireless Networking Basics
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Client with a WPA/
WPA2-enabled wireless adapter and supplicant
(Win XP, Funk,
Meetinghouse)
For example, a
WPA/WPA2-enabled
AP
For example, a
RADIUS server
1
2
3
4
6 5
7
Figure 4-4: 802.1x Authentication Sequence
The AP sends Beacon Frames with WPA/WPA2 information element to the stations in the service set. Information elements include the required authentication method (802.1x or Pre-shared key) and the preferred cipher suite (WEP, TKIP, or AES). Probe Responses (AP to station) and
Association Requests (station to AP) also contain WPA information elements.
1.
2.
Initial 802.1x communications begin with an unauthenticated supplicant (client device) attempting to connect with an authenticator (802.11 access point). The client sends an
EAP-start message. This begins a series of message exchanges to authenticate the client.
The access point replies with an EAP-request identity message.
Wireless Networking Basics
202-10099-01, April 2005
D-13
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
5.
6.
7.
3.
4.
The client sends an EAP-response packet containing the identity to the authentication server.
The access point responds by enabling a port for passing only EAP packets from the client to an authentication server located on the wired side of the access point. The access point blocks all other traffic, such as HTTP, DHCP, and POP3 packets, until the access point can verify the client's identity using an authentication server (for example, RADIUS).
The authentication server uses a specific authentication algorithm to verify the client's identity.
This could be through the use of digital certificates or some other EAP authentication type.
The authentication server will either send an accept or reject message to the access point.
The access point sends an EAP-success packet (or reject packet) to the client.
If the authentication server accepts the client, then the access point will transition the client's port to an authorized state and forward additional traffic.
The important part to know at this point is that the software supporting the specific EAP type resides on the authentication server and within the operating system or application “supplicant” software on the client devices. The access point acts as a “pass through” for 802.1x messages, which means that you can specify any EAP type without needing to upgrade an 802.1x-compliant access point. As a result, you can update the EAP authentication type to such devices as token cards (Smart Cards), Kerberos, one-time passwords, certificates, and public key authentication, or as newer types become available and your requirements for security change.
WPA/WPA2 Data Encryption Key Management
With 802.1x, the rekeying of unicast encryption keys is optional. Additionally, 802.11 and 802.1x provide no mechanism to change the global encryption key used for multicast and broadcast traffic. With WPA/WPA2, rekeying of both unicast and global encryption keys is required.
For the unicast encryption key, the Temporal Key Integrity Protocol (TKIP) changes the key for every frame, and the change is synchronized between the wireless client and the wireless access point (AP). For the global encryption key, WPA includes a facility (the Information Element) for the wireless AP to advertise the changed key to the connected wireless clients.
If configured to implement dynamic key exchange, the 802.1x authentication server can return session keys to the access point along with the accept message. The access point uses the session keys to build, sign and encrypt an EAP key message that is sent to the client immediately after sending the success message. The client can then use contents of the key message to define applicable encryption keys. In typical 802.1x implementations, the client can automatically change encryption keys as often as necessary to minimize the possibility of eavesdroppers having enough time to crack the key in current use.
D-14 Wireless Networking Basics
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Temporal Key Integrity Protocol (TKIP)
WPA uses TKIP to provide important data encryption enhancements including a per-packet key mixing function, a message integrity check (MIC) named Michael, an extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. TKIP also provides for the following:
• The verification of the security configuration after the encryption keys are determined.
• The synchronized changing of the unicast encryption key for each frame.
• The determination of a unique starting unicast encryption key for each preshared key authentication.
Michael
With 802.11 and WEP, data integrity is provided by a 32-bit integrity check value (ICV) that is appended to the 802.11 payload and encrypted with WEP. Although the ICV is encrypted, you can use cryptanalysis to change bits in the encrypted payload and update the encrypted ICV without being detected by the receiver.
With WPA, a method known as Michael specifies a new algorithm that calculates an 8-byte message integrity check (MIC) using the calculation facilities available on existing wireless devices. The MIC is placed between the data portion of the IEEE 802.11 frame and the 4-byte ICV.
The MIC field is encrypted together with the frame data and the ICV.
Michael also provides replay protection. A new frame counter in the IEEE 802.11 frame is used to prevent replay attacks.
AES Support for WPA2
One of the encryption methods supported by WPA2 is the advanced encryption standard (AES), although AES support will not be required initially for Wi-Fi certification. This is viewed as the optimal choice for security conscience organizations, but the problem with AES is that it requires a fundamental redesign of the NIC’s hardware in both the station and the access point. TKIP is a pragmatic compromise that allows organizations to deploy better security while AES capable equipment is being designed, manufactured, and incrementally deployed.
Wireless Networking Basics
202-10099-01, April 2005
D-15
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Is WPA/WPA2 Perfect?
WPA/WPA2 is not without its vulnerabilities. Specifically, it is susceptible to denial of service
(DoS) attacks. If the access point receives two data packets that fail the message integrity code
(MIC) within 60 seconds of each other, then the network is under an active attack, and as a result, the access point employs counter measures, which include disassociating each station using the access point. This prevents an attacker from gleaning information about the encryption key and alerts administrators, but it also causes users to lose network connectivity for 60 seconds. More than anything else, this may just prove that no single security tactic is completely invulnerable.
WPA/WPA2 is a definite step forward in WLAN security over WEP and has to be thought of as a single part of an end-to-end network security strategy.
Product Support for WPA/WPA2
Starting in August, 2003, NETGEAR, Inc. wireless Wi-Fi certified products will support the WPA standard. NETGEAR, Inc. wireless products that had their Wi-Fi certification approved before
August, 2003 will have one year to add WPA so as to maintain their Wi-Fi certification.
WPA/WPA2 requires software changes to the following:
• Wireless access points
• Wireless network adapters
• Wireless client programs
Supporting a Mixture of WPA, WPA2, and WEP Wireless Clients is Discouraged
To support the gradual transition of WEP-based wireless networks to WPA/WPA2, a wireless AP can support both WEP and WPA/WPA2 clients at the same time. During the association, the wireless AP determines which clients use WEP and which clients use WPA/WPA2. The disadvantage to supporting a mixture of WEP and WPA/WPA2 clients is that the global encryption key is not dynamic. This is because WEP-based clients cannot support it. All other benefits to the
WPA clients, such as integrity, are maintained.
However, a mixed mode supporting WPA/WPA2 and non-WPA/WPA2 clients would offer network security that is no better than that obtained with a non-WPA/WPA2 network, and thus this mode of operation is discouraged.
D-16
202-10099-01, April 2005
Wireless Networking Basics
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Changes to Wireless Access Points
Wireless access points must have their firmware updated to support the following:
• The new WPA/WPA2 information element
To advertise their support of WPA/WPA2, wireless APs send the beacon frame with a new
802.11 WPA/WPA2 information element that contains the wireless AP's security configuration
(encryption algorithms and wireless security configuration information).
• The WPA/WPA2 two-phase authentication
Open system, then 802.1x (EAP with RADIUS or preshared key).
• TKIP
• Michael
• AES (WPA2)
To upgrade your wireless access points to support WPA/WPA2, obtain a WPA/WPA2 firmware update from your wireless AP vendor and upload it to your wireless AP.
Changes to Wireless Network Adapters
Wireless networking software in the adapter, and possibly in the OS or client application, must be updated to support the following:
• The new WPA/WPA2 information element
Wireless clients must be able to process the WPA/WPA2 information element and respond with a specific security configuration.
• The WPA/WPA2 two-phase authentication
Open system, then 802.1x supplicant (EAP or preshared key).
• TKIP
• Michael
• AES (WPA2)
To upgrade your wireless network adapters to support WPA/WPA2, obtain a WPA/WPA2 update from your wireless network adapter vendor and update the wireless network adapter driver.
For Windows wireless clients, you must obtain an updated network adapter driver that supports
WPA. For wireless network adapter drivers that are compatible with Windows XP (Service Pack 1) and Windows Server 2003, the updated network adapter driver must be able to pass the adapter's
WPA capabilities and security configuration to the Wireless Zero Configuration service.
Wireless Networking Basics
202-10099-01, April 2005
D-17
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Microsoft has worked with many wireless vendors to embed the WPA driver update in the wireless adapter driver. So, to update your Microsoft Windows wireless client, all you have to do is obtain the new WPA/WPA2-compatible driver and install the driver.
Changes to Wireless Client Programs
Wireless client programs must be updated to permit the configuration of WPA/WPA2 authentication (and preshared key) and the new WPA/WPA2 encryption algorithms (TKIP and
AES).
To obtain the Microsoft WPA client program, visit the Microsoft Web site.
Note: The Microsoft WPA2 client is still in beta.
D-18
202-10099-01, April 2005
Wireless Networking Basics
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Glossary
Use the list below to find definitions for technical terms used in this manual.
802.11 Standard
802.11, or IEEE 802.11, is a type of radio technology used for wireless local area networks (WLANs). It is a standard that has been developed by the IEEE (Institute of Electrical and Electronic Engineers), http://standards.ieee.org
. The IEEE is an international organization that develops standards for hundreds of electronic and electrical technologies. The organization uses a series of numbers, like the Dewey Decimal system in libraries, to differentiate between the various technology families.
The 802 subgroup (of the IEEE) develops standards for local and wide area networks with the 802.11 section reviewing and creating standards for wireless local area networks.
Wi-Fi , 802.11, is composed of several standards operating in different radio frequencies: 802.11b is a standard for wireless LANs operating in the 2.4 GHz spectrum with a bandwidth of 11 Mbps; 802.11a is a different standard for wireless LANs, and pertains to systems operating in the 5 GHz frequency range with a bandwidth of 54 Mbps. Another standard, 802.11g, is for WLANS operating in the 2.4 GHz frequency but with a bandwidth of 54 Mbps.
802.11a Standard
An IEEE specification for wireless networking that operates in the 5 GHz frequency range (5.15 GHz to
5.85 GHz) with a maximum 54 Mbps data transfer rate. The 5 GHz frequency band is not as crowded as the
2.4 GHz frequency, because the 802.11a specification offers more radio channels than the 802.11b. These additional channels can help avoid radio and microwave interference.
802.11b Standard
International standard for wireless networking that operates in the 2.4 GHz frequency range (2.4 GHz to
2.4835 GHz) and provides a throughput of up to 11 Mbps. This is a very commonly used frequency.
Microwave ovens, cordless phones, medical and scientific equipment, as well as Bluetooth devices, all work within the 2.4 GHz frequency band.
802.11d Standard
802.11d is an IEEE standard supplementary to the Media Access Control (MAC) layer in 802.11 to promote worldwide use of 802.11 WLANs. It will allow access points to communicate information on the permissible radio channels with acceptable power levels for client devices. The devices will automatically adjust based on geographic requirements.
The purpose of 11d is to add features and restrictions to allow WLANs to operate within the rules of these countries. Equipment manufacturers do not want to produce a wide variety of country-specific products and users that travel do not want a bag full of country-specific WLAN PC cards. The outcome will be country-specific firmware solutions.
Glossary -1
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
802.11e Standard
802.11e is a proposed IEEE standard to define quality of service (QoS) mechanisms for wireless gear that gives support to bandwidth-sensitive applications such as voice and video.
802.11g Standard
Similar to 802.11b, this physical layer standard provides a throughput of up to 54 Mbps. It also operates in the 2.4 GHz frequency band but uses a different radio technology in order to boost overall bandwidth.
802.11i
This is the name of the IEEE Task Group dedicated to standardizing WLAN security. The 802.11i Security has a frame work based on RSN (Robust Security Mechanism). RSN consists of two parts: 1) The Data
Privacy Mechanism and 2) Security Association Management.
The Data Privacy Mechanism supports two proposed schemes: TKIP and AES. TKIP (Temporal Key
Integrity) is a short-term solution that defines software patches to WEP to provide a minimally adequate level of data privacy. AES or AES-OCB (Advanced Encryption Standard and Offset Codebook) is a robust data privacy scheme and is a longer-term solution.
Security Association Management is addressed by a) RSN Negotiation Procedures, b) IEEE 802.1x
Authentication and c) IEEE 802.1x Key management.
The standards are being defined to naturally co-exist with pre-RSN networks that are currently deployed.
802.11n Standard
A recently formed (Oct 2003) IEEE official task group referred to as: 802.11n or "TGn" for the 100 Mbps wireless physical layer standard protocol. Current published ratification date is December 2005. As of
February 2004, no draft specification has been written - It is expected to use both the 2.4 and 5GHz frequencies.
AES (Advanced Encryption Standard)
A symmetric 128-bit block data encryption technique developed by Belgian cryptographers Joan Daemen and Vincent Rijmen. The U.S government adopted the algorithm as its encryption technique in October
2000, replacing the DES encryption it used. AES works at multiple network layers simultaneously. The
National Institute of Standards and Technology (NIST) of the U.S. Department of Commerce selected the algorithm, called Rijndael (pronounced Rhine Dahl or Rain Doll), out of a group of five algorithms under consideration, including one called MARS from a large research team at IBM. AES is expected to replace
WEP as a WLAN encryption method in 2003.
Access Point (AP)
A wireless LAN transceiver or "base station" that can connect a wired LAN to one or many wireless devices.
Access points can also bridge to each other.
There are various types of access points, also referred to as base stations, used in both wireless and wired networks. These include bridges, hubs, switches, routers and gateways. The differences between them are not always precise, because certain capabilities associated with one can also be added to another. For example, a router can do bridging, and a hub may also be a switch. But they are all involved in making sure data is transferred from one location to another.
-2 Glossary
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
A bridge connects devices that all use the same kind of protocol. A router can connect networks that use differing protocols. It also reads the addresses included in the packets and routes them to the appropriate computer station, working with any other routers in the network to choose the best path to send the packets on. A wireless hub or access point adds a few capabilities such as roaming and provides a network connection to a variety of clients, but it does not allocate bandwidth. A switch is a hub that has extra intelligence: It can read the address of a packet and send it to the appropriate computer station. A wireless gateway is an access point that provides additional capabilities such as NAT routing, DHCP, firewalls, security, etc.
Ad-Hoc mode
A client setting that provides independent peer-to-peer connectivity in a wireless LAN. An alternative set-up is one where PCs communicate with each other through an AP. See access point and Infrastructure mode.
Bandwidth
The amount of transmission capacity that is available on a network at any point in time. Available bandwidth depends on several variables such as the rate of data transmission speed between networked devices, network overhead, number of users, and the type of device used to connect PCs to a network. It is similar to a pipeline in that capacity is determined by size: the wider the pipe, the more water can flow through it; the more bandwidth a network provides, the more data can flow through it. Standard 802.11b provides a bandwidth of 11 Mbps; 802.11a and 802.11g provide a bandwidth of 54 Mbps.
Bits per second (bps)
A measure of data transmission speed over communication lines based on the number of bits that can be sent or received per second. Bits per second—bps—is often confused with bytes per second—Bps. While "bits" is a measure of transmission speed, "bytes" is a measure of storage capability. 8 bits make a byte, so if a wireless network is operating at a bandwidth of 11 megabits per second (11 Mbps or 11 Mbits/sec), it is sending data at 1.375 megabytes per second (1.375 Mbps).
Bluetooth Wireless Technology
A technology specification for linking portable computers, personal digital assistants (PDAs) and mobile phones for short-range transmission of voice and data across a global radio frequency band without the need for cables or wires. Bluetooth is a frequency-hopping technology in the 2.4 GHz frequency spectrum, with a range of 30 feet and up to 11Mbps raw data throughput.
Bridge
A product that connects a local area network (LAN) to another local area network that uses the same protocol (for example, wireless, Ethernet or token ring). Wireless bridges are commonly used to link buildings in campuses.
Client or Client devices
Any computer connected to a network that requests services (files, print capability) from another member of the network. Clients are end users. Wi-Fi client devices include PC Cards that slide into laptop computers, mini-PCI modules embedded in laptop computers and mobile computing devices, as well as USB and PCI/
Glossary -3
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
ISA bus Wi-Fi radios. Client devices usually communicate with hub devices like access points and gateways.
Collision avoidance
A network node characteristic for proactively detecting that it can transmit a signal without risking a collision, thereby ensuring a more reliable connection.
Crossover cable
A special cable used for networking two computers without the use of a hub. Crossover cables may also be required for connecting a cable or DSL modem to a wireless gateway or access point. Instead of the signals transferring in parallel paths from one set of plugs to another, the signals "crossover." If an eight-wire cable was being used, for instance, the signal would start on pin one at one end of the cable and end up on pin eight at the other end. They "cross-over" from one side to the other.
CSMA-CA (Carrier Sense Multiple Access/Collision Avoidance)
CSMA/CA is the principle medium access method employed by IEEE 802.11 WLANs. It is a "listen before talk": method of minimizing (but not eliminating) collisions caused by simultaneous transmission by multiple radios. IEEE 802.11 states collision avoidance method rather than collision detection must be used, because the standard employs half duplex radios—radios capable of transmission or reception—but not both simultaneously.
Unlike conventional wired Ethernet nodes, a WLAN station cannot detect a collision while transmitting. If a collision occurs, the transmitting station will not receive an ACKnowledge packet from the intended receive station. For this reason, ACK packets have a higher priority than all other network traffic. After completion of a data transmission, the receive station will begin transmission of the ACK packet before any other node can begin transmitting a new data packet. All other stations must wait a longer pseudo randomized period of time before transmitting. If an ACK packet is not received, the transmitting station will wait for a subsequent opportunity to retry transmission
CSMA-CD (Carrier Sense Multiple Access/Collision Detection)
A method of managing traffic and reducing noise on an Ethernet network. A network device transmits data after detecting that a channel is available. However, if two devices transmit data simultaneously, the sending devices detect a collision and retransmit after a random time delay.
DHCP (Dynamic Host Configuration Protocol)
A utility that enables a server to dynamically assign IP addresses from a predefined list and limit their time of use so that they can be reassigned. Without DHCP, an IT Manager would have to manually enter in all the
IP addresses of all the computers on the network. When DHCP is used, whenever a computer logs onto the network, it automatically gets an IP address assigned to it.
Diversity antenna
A type of antenna system that uses two antennas to maximize reception and transmission quality and reduce interference
-4 Glossary
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
DNS (Domain Name Service)
A program that translates URLs to IP addresses by accessing a database maintained on a collection of
Internet servers. The program works behind the scenes to facilitate surfing the Web with alpha versus numeric addresses. A DNS server converts a name like mywebsite.com to a series of numbers like
107.22.55.26. Every website has its own specific IP address on the Internet.
Encryption Key
An alphanumeric (letters and/or numbers) series that enables data to be encrypted and then decrypted so it can be safely shared among members of a network. WEP uses an encryption key that automatically encrypts outgoing wireless data. On the receiving side, the same encryption key enables the computer to automatically decrypt the information so it can be read.
Enhanced Data Encryption through TKIP
To improve data encryption, Wi-Fi Protected Access utilizes its Temporal Key Integrity Protocol (TKIP).
TKIP provides important data encryption enhancements including a per-packet key mixing function, a message integrity check (MIC) named Michael, an extended initialization vector (IV) with sequencing rules, and a re-keying mechanism. Through these enhancements, TKIP addresses all WEP known vulnerabilities.
Enterprise-level User Authentication via 802.1x and EAP
WEP has almost no user authentication mechanism. To strengthen user authentication, Wi-Fi Protected
Access implements 802.1x and the Extensible Authentication Protocol (EAP). Together, these implementations provide a framework for strong user authentication. This framework utilizes a central authentication server, such as RADIUS, to authenticate each user on the network before they join it, and also employs "mutual authentication" so that the wireless user doesn’t accidentally join a rogue network that might steal its network credentials.
ESSID (more commonly referred to as SSID – Short Set Identifier)
The identifying name of an 802.11 wireless network. When you specify your correct ESSID in your client setup you ensure that you connect to your wireless network rather than another network in range. (See
SSID.) The ESSID can be called by different terms, such as Network Name, Preferred Network, SSID or
Wireless LAN Service Area.
Ethernet
International standard networking technology for wired implementations. Basic 10BaseT networks offer a bandwidth of about 10 Mbps. Fast Ethernet (100 Mbps) and Gigabit Ethernet (1000 Mbps) are becoming popular.
Firewall
A system that secures a network and prevents access by unauthorized users. Firewalls can be software, hardware or a combination of both. Firewalls can prevent unrestricted access into a network, as well as restrict data from flowing out of a network.
Glossary -5
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Gateway
In the wireless world, a gateway is an access point with additional software capabilities such as providing
NAT and DHCP. Gateways may also provide VPN support, roaming, firewalls, various levels of security, etc.
Hot Spot (also referred to as Public Access Location)
A place where you can access Wi-Fi service. This can be for free or for a fee. HotSpots can be inside a coffee shop, airport lounge, train station, convention center, hotel or any other public meeting area. Corporations and campuses are also implementing HotSpots to provide wireless Internet access to their visitors and guests. In some parts of the world, HotSpots are known as CoolSpots.
Hub
A multiport device used to connect PCs to a network via Ethernet cabling or via Wi-Fi. Wired hubs can have numerous ports and can transmit data at speeds ranging from 10 Mbps to multigigabyte speeds per second.
A hub transmits packets it receives to all the connected ports. A small wired hub may only connect 4 computers; a large hub can connect 48 or more. Wireless hubs can connect hundreds.
Hz (‘hertz”)
The international unit for measuring frequency, equivalent to the older unit of cycles per second. One megahertz (MHz) is one million hertz. One gigahertz (GHz) is one billion hertz. The standard US electrical power frequency is 60 Hz, the AM broadcast radio frequency band is 535—1605 kHz, the FM broadcast radio frequency band is 88—108 MHz, and wireless 802.11b LANs operate at 2.4 GHz.
IEEE (Institute of Electrical and Electronics Engineers)
A membership organization (www.ieee.org) that includes engineers, scientists and students in electronics and allied fields. It has more than 300,000 members and is involved with setting standards for computers and communications.
IEEE 802.11
A set of specifications for LANs from The Institute of Electrical and Electronics Engineers (IEEE). Most wired networks conform to 802.3, the specification for CSMA/CD based Ethernet networks or 802.5, the specification for token ring networks. 802.11 defines the standard for wireless LANs encompassing three incompatible (non-interoperable) technologies: Frequency Hopping Spread Spectrum (FHSS), Direct
Sequence Spread Spectrum (DSSS) and Infrared. WECA’s (Wireless Ethernet Compatibility Alliance – now
Wi-Fi Alliance) focus is on 802.11b, an 11 Mbps high-rate DSSS standard for wireless networks.
Infrastructure mode
A client setting providing connectivity to an access point (AP). As compared to Ad-Hoc mode, whereby PCs communicate directly with each other, clients set in Infrastructure Mode all pass data through a central AP.
The AP not only mediates wireless network traffic in the immediate neighborhood, but also provides communication with the wired network. See Ad-Hoc and AP.
-6 Glossary
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
IP (Internet Protocol) address
A 32-bit number that identifies each sender or receiver of information that is sent across the Internet. An IP address has two parts: an identifier of a particular network on the Internet and an identifier of the particular device (which can be a server or a workstation) within that network.
ISO Network Model
A network model developed by the International Standards Organization (ISO) that consists of seven different levels, or layers. By standardizing these layers, and the interfaces in between, different portions of a given protocol can be modified or changed as technologies advance or systems requirements are altered.
The seven layers are:
• Physical
• Data Link
• Network
• Transport
• Session
• Presentation
• Application
The IEEE 802.11 Standard encompasses the physical layer (PHY) and the lower portion of the data link layer. The lower portion of the data link layer is often referred to as the Medium Access Controller (MAC) sublayer.
MAC (Media Access Control)
Every wireless 802.11 device has its own specific MAC address hard-coded into it. This unique identifier can be used to provide security for wireless networks. When a network uses a MAC table, only the 802.11 radios that have had their MAC addresses added to that network's MAC table will be able to get onto the network.
Mesh Networks
Also called mesh topology, mesh is a network topology in which devices are connected with many redundant interconnections between network nodes. In a full mesh topology every node has a connection to every other node in the network. Mesh networks may be wired or wireless.
Glossary
202-10099-01, April 2005
-7
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
In a wireless mesh example, each of the spheres below represent a mesh router. Corporate servers and printers may be shared by attaching to each mesh router. For wireless access to the mesh, an access point must be attached to any one of the mesh routers.
Multiple Input Multiple Output (MIMO)
MIMO refers to radio links with multiple antennas at the transmitter and the receiver side to improve the performance of the wireless link.
NAT (Network Address Translation)
A network capability that enables a houseful of computers to dynamically share a single incoming IP address from a dial-up, cable or xDSL connection. NAT takes the single incoming IP address and creates new IP address for each client computer on the network.
Network name
Identifies the wireless network for all the shared components. During the installation process for most wireless networks, you need to enter the network name or SSID. Different network names are used when setting up your individual computer, wired network or workgroup.
NIC (Network Interface Card)
A type of PC adapter card that either works without wires (Wi-Fi) or attaches to a network cable to provide two-way communication between the computer and network devices such as a hub or switch. Most office wired NICs operate at 10 Mbps (Ethernet), 100 Mbps (Fast Ethernet) or 10/100 Mbps dual speed.
High-speed Gigabit and 10 Gigabit NIC cards are also available. See PC Card.
PC card (also called PCMCIA)
A removable, credit-card-sized memory or I/O (input/output) device that fits into a Type 2 PCMCIA standard slot, PC Cards are used primarily in PCs, portable computers, PDAs and laptops. PC Card peripherals include Wi-Fi cards, memory cards, modems, NICs, hard drives, etc.
PCI adapter
A high-performance I/O computer bus used internally on most computers. Other bus types include ISA and
AGP. PCIs and other computer buses enable the addition of internal cards that provide services and features not supported by the motherboard or other connectors.
Peer-to-peer network (also called Ad-Hoc in WLANs)
A wireless or wired computer network that has no server or central hub or router. All the networked PCs are equally able to act as a network server or client, and each client computer can talk to all the other wireless computers without having to go through an access point or hub. However, since there is no central base station to monitor traffic or provide Internet access, the various signals can collide with each other, reducing overall performance.
PHY
The lowest layer within the OSI Network Model. It deals primarily with transmission of the raw bit stream over the PHYsical transport medium. In the case of wireless LANs, the transport medium is free space. The
-8 Glossary
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
PHY defines parameters such as data rates, modulation method, signaling parameters, transmitter/receiver synchronization, etc. Within an actual radio implementation, the PHY corresponds to the radio front end and baseband signal processing sections.
Plug and Play
A computer system feature that provides for automatic configuration of add-ons and peripheral devices such as wireless PC Cards, printers, scanners and multimedia devices.
Proxy server
Used in larger companies and organizations to improve network operations and security, a proxy server is able to prevent direct communication between two or more networks. The proxy server forwards allowable data requests to remote servers and/or responds to data requests directly from stored remote server data
Range
The distance away from your access point that your wireless network can reach. Most Wi-Fi systems will provide a range of a hundred feet or more. Depending on the environment and the type of antenna used,
Wi-Fi signals can have a range of up to mile
Residential gateway
A wireless device that connects multiple PCs, peripherals and the Internet on a home network. Most Wi-Fi residential gateways provide DHCP and NAT as well.
RJ-45
Standard connectors used in Ethernet networks. Even though they look very similar to standard RJ-11 telephone connectors, RJ-45 connectors can have up to eight wires, whereas telephone connectors have only four.
Roaming
Moving seamlessly from one AP coverage area to another with your laptop or desktop with no loss in connectivity.
Rogue Access Point
"Rogue AP" is a term used to describe an unauthorized access point that is connected on the main home or corporate network or operating in a stand-alone mode (in a parking lot or in a neighbor's building). Rogue
APs, by definition, are not under the management of network administrators and do not conform to network security policies and may present a severe security risk. Ideally, it is best to have some type of WLAN system that does not allow rogue access points to easily be added to an existing WLAN.
Router
A device that forwards data packets from one local area network (LAN) or wide area network (WAN) to another. Based on routing tables and routing protocols, routers can read the network address in each transmitted frame and make a decision on how to send it via the most efficient route based on traffic load, line costs, speed, bad connections, etc.
Glossary -9
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Satellite broadband
A wireless high-speed Internet connection provided by satellites. Some satellite broadband connections are two-way—up and down. Others are one-way, with the satellite providing a high-speed downlink and then using a dial-up telephone connection or other land-based system for the uplink to the Internet.
Server
A computer that provides its resources to other computers and devices on a network. These include print servers, Internet servers and data servers. A server can also be combined with a hub or router.
Site survey
The process whereby a wireless network installer inspects a location prior to putting in a wireless network.
Site surveys are used to identify the radio- and client-use properties of a facility so that access points can be optimally placed.
SSID (also called ESSID)
A 32-character unique identifier attached to the header of packets sent over a WLAN that acts as a password when a mobile device tries to connect to the BSS. (Also called ESSID.) The SSID differentiates one WLAN from another, so all access points and all devices attempting to connect to a specific WLAN must use the same SSID.
A device will not be permitted to join the BSS unless it can provide the unique SSID. Because an SSID can be sniffed in plain text from a packet, it does not supply any security to the network. An SSID is also referred to as a Network Name because essentially it is a name that identifies a wireless network.
SSL (Secure Sockets Layer)
Commonly used encryption scheme used by many online retail and banking sites to protect the financial integrity of transactions. When an SSL session begins, the server sends its public key to the browser. The browser then sends a randomly generated secret key back to the server in order to have a secret key exchange for that session.
Subnetwork or Subnet
Found in larger networks, these smaller networks are used to simplify addressing between numerous computers. Subnets connect to the central network through a router, hub or gateway. Each individual wireless LAN will probably use the same subnet for all the local computers it talks to.
Switch
A type of hub that efficiently controls the way multiple devices use the same network so that each can operate at optimal performance. A switch acts as a networks traffic cop: rather than transmitting all the packets it receives to all ports as a hub does, a switch transmits packets to only the receiving port.
TCP (Transmission Control Protocol)
A protocol used along with the Internet Protocol (IP) to send data in the form of individual units (called packets) between computers over the Internet. While IP takes care of handling the actual delivery of the data, TCP takes care of keeping track of the packets that a message is divided into for efficient routing through the Internet.
-10 Glossary
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
For example, when a web page is downloaded from a web server, the TCP program layer in that server divides the file into packets, numbers the packets, and then forwards them individually to the IP program layer. Although each packet has the same destination IP address, it may get routed differently through the network. At the other end, TCP reassembles the individual packets and waits until they have all arrived to forward them as a single file.
TCP/IP
The underlying technology behind the Internet and communications between computers in a network. The first part, TCP, is the transport part, which matches the size of the messages on either end and guarantees that the correct message has been received. The IP part is the user's computer address on a network. Every computer in a TCP/IP network has its own IP address that is either dynamically assigned at startup or permanently assigned. All TCP/IP messages contain the address of the destination network as well as the address of the destination station. This enables TCP/IP messages to be transmitted to multiple networks
(subnets) within an organization or worldwide.
TKIP
A security feature that is a WEP enhancement: Temporal Key Integrity Protocol and Message Integrity
Check (MIC) is a modification of WEP to defend against known attacks (WEP+ four patches for key mixing, message integrity, rekeying, initialization vector protection)
Universal Plug and Play (UPnP)
UPnP helps devices, such as Internet appliances and computers, access the network and connect to other devices as needed. UPnP devices can automatically discover the services from other registered UPnP devices on the network.
USB (Universal Serial Bus)
A high-speed bidirectional serial connection between a PC and a peripheral that transmits data at the rate of
12 megabits per second. The new USB 2.0 specification provides a data rate of up to 480 Mbps, compared to standard USB at only 12 Mbps. 1394, FireWire and iLink all provide a bandwidth of up to 400 Mbps.
VoIP (Voice over IP)
Voice transmission using Internet Protocol to create digital packets distributed over the Internet. VoIP can be less expensive than voice transmission using standard analog packets over POTS (Plain Old Telephone
Service).
VPN (Virtual Private Network)
A type of technology designed to increase the security of information transferred over the Internet. VPN can work with either wired or wireless networks, as well as with dial-up connections over POTS. VPN creates a private encrypted tunnel from the end user's computer, through the local wireless network, through the
Internet, all the way to the corporate servers and database.
War Chalking
The act of making chalk marks on outdoor surfaces (walls, sidewalks, buildings, sign posts, trees) to indicate the existence of an open wireless network connection, usually offering an Internet connection so that others
Glossary -11
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6 can benefit from the free wireless access. The open connections typically come from the access points of wireless networks located within buildings to serve enterprises. The chalk symbols indicate the type of access point that is available at that specific spot.
There are three basic designs that are currently used: a pair of back-to-back semicircles, which denotes an open node; a closed circle, which denotes a closed node; a closed circle with a “W” inside, which denotes a node equipped with WEP. Warchalkers also draw identifiers above the symbols to indicate the password that can be used to access the node, which can easily be obtained with sniffer software.
As a recent development, the debate over the legality of warchalking is still going on.
The practice stems from the U.S. Depression-era culture of wandering hobos who would make marks outside of homes to indicate to other wanderers whether the home was receptive to drifters or was inhospitable.
War Driving
War driving is the act of locating and possibly exploiting connections to wireless local area networks while driving around a city or elsewhere. To do war driving, you need a vehicle, a computer (which can be a laptop), a wireless Ethernet card set to work in promiscuous mode, and some kind of an antenna which can be mounted on top of or positioned inside the car. Because a wireless LAN may have a range that extends beyond an office building, an outside user may be able to intrude into the network, obtain a free Internet connection, and possibly gain access to company records and other resources.
Some people have made a sport out of war driving, in part to demonstrate the ease with which wireless
LANs can be compromised. With an omnidirectional antenna and a geophysical positioning system (GPS), the war driver can systematically map the locations of 802.11b wireless access points.
WEP (Wired Equivalent Privacy)
Basic wireless security provided by Wi-Fi. In some instances, WEP may be all a home or small-business user needs to protect wireless data. WEP is available in 40-bit (also called 64-bit), or in 108-bit (also called
128-bit) encryption modes. As 108-bit encryption provides a longer algorithm that takes longer to decode, it can provide better security than basic 40-bit (64-bit) encryption.
Wi-Fi (Wireless Fidelity)
Another name for IEEE 802.11b. Products certified as Wi-Fi are interoperable with each other even if they are from different manufacturers. A user with a Wi-Fi product can use any brand of access point with any other brand of client hardware that is built to the Wi-Fi standard.
Wi-Fi Alliance (formerly WECA – Wireless Ethernet Compatibility Alliance)
The Wi-Fi Alliance is a nonprofit international association formed in 1999 to certify interoperability of wireless Local Area Network products based on IEEE 802.11 specification. Currently the Wi-Fi Alliance has 193 member companies from around the world, and 509 products have received Wi-Fi certification since certification began in March of 2000. The goal of the Wi-Fi Alliance's members is to enhance the user experience through product interoperability (www.weca.net).
-12 Glossary
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Wi-Fi Protected Access (WPA)
WPA is a security technology for wireless networks that improves on the authentication and encryption features of WEP (Wired Equivalent Privacy). In fact, WPA was developed by the networking industry in response to the shortcomings of WEP.
One of the key technologies behind WPA is the Temporal Key Integrity Protocol (TKIP). TKIP addresses the encryption weaknesses of WEP. Another key component of WPA is built-in authentication that WEP does not offer. With this feature, WPA provides roughly comparable security to VPN tunneling with WEP, with the benefit of easier administration and use. This is similar to 802.1x support and requires a RADIUS server in order to implement. The Wi-Fi Alliance will call this, 'WPA-Enterprise.'
One variation of WPA is called WPA Pre Shared Key or WPA-PSK for short - this provides an authentication alternative to an expensive RADIUS server. WPA-PSK is a simplified but still powerful form of WPA most suitable for home Wi-Fi networking. To use WPA-PSK, a person sets a static key or
"passphrase" as with WEP. But, using TKIP, WPA-PSK automatically changes the keys at a preset time interval, making it much more difficult for hackers to find and exploit them. The Wi-Fi Alliance will call this, 'WPA-Personal.'
Wi-Fi Protected Access and IEEE 802.11i Comparison
Wi-Fi Protected Access will be forward-compatible with the IEEE 802.11i security specification currently under development by the IEEE. Wi-Fi Protected Access is a subset of the current 802.11i draft, taking certain pieces of the 802.11i draft that are ready to bring to market today, such as its implementation of
802.1x and TKIP. These features can also be enabled on most existing Wi-Fi CERTIFIED products as a software upgrade. The main pieces of the 802.11i draft that are not included in Wi-Fi Protected Access are secure IBSS, secure fast handoff, secure de-authentication and disassociation, as well as enhanced encryption protocols such as AES-CCMP. These features are either not yet ready for market or will require hardware upgrades to implement.
Wi-Fi Protected Access for the Enterprise
Wi-Fi Protected Access effectively addresses the WLAN security requirements for the enterprise and provides a strong encryption and authentication solution prior to the ratification of the IEEE 802.11i standard. In an enterprise with IT resources, Wi-Fi Protected Access should be used in conjunction with an authentication server such as RADIUS to provide centralized access control and management. With this implementation in place, the need for add-on solutions such as VPNs may be eliminated, at least for the express purpose of securing the wireless link in a network.
Wi-Fi Protected Access for Home/SOHO
In a home or Small Office/ Home Office (SOHO) environment, where there are no central authentication servers or EAP framework, Wi-Fi Protected Access runs in a special home mode. This mode, also called
Pre-Shared Key (PSK), allows the use of manually-entered keys or passwords and is designed to be easy to set up for the home user. All the home user needs to do is enter a password (also called a master key) in their access point or home wireless gateway and each PC that is on the Wi-Fi wireless network. Wi-Fi Protected
Access takes over automatically from that point. First, the password allows only devices with a matching password to join the network, which keeps out eavesdroppers and other unauthorized users. Second, the password automatically kicks off the TKIP encryption process, described above.
Glossary -13
202-10099-01, April 2005
Reference Manual for the 54 Mbps Wireless Router WGR614 v6
Wi-Fi Protected Access for Public Access
The intrinsic encryption and authentication schemes defined in Wi-Fi Protected Access may also prove useful for Wireless Internet Service Providers (WISPs) offering Wi-Fi public access in "hot spots" where secure transmission and authentication is particularly important to users unknown to each other. The authentication capability defined in the specification enables a secure access control mechanism for the service providers and for mobile users not utilizing VPN connections.
Wi-Fi Protected Access in "Mixed Mode" Deployment
In a large network with many clients, a likely scenario is that access points will be upgraded before all the
Wi-Fi clients. Some access points may operate in a "mixed mode", which supports both clients running
Wi-Fi Protected Access and clients running original WEP security. While useful for transition, the net effect of supporting both types of client devices is that security will operate at the less secure level (WEP), common to all the devices. Therefore, organizations will benefit by accelerating the move to Wi-Fi Protected
Access for all Wi-Fi clients and access points.
WiMAX
An IEEE 802.16 Task Group that provides a specification for fixed broadband wireless access systems employing a point-to-multipoint (PMP) architecture. Task Group 1 of IEEE 802.16 developed a point-to-multipoint broadband wireless access standard for systems in the frequency range 10-66 GHz. The standard covers both the Media Access Control (MAC) and the physical (PHY) layers. Ratification is expected in second half of 2004.
Wireless Multimedia (WMM)
WMM (Wireless Multimedia) is a subset of the 802.11e standard. WMM allows wireless traffic to have a range of priorities, depending on the kind of data. Time-dependent information, like video, audio, or voice will have a higher priority than normal traffic. For WMM to function correctly, wireless clients must also support WMM.
Wireless Networking
Wireless Networking refers to the infrastructure enabling the transmission of wireless signals. A network ties things together and enables resource sharing.
WLAN (Wireless LAN)
Also referred to as LAN. A type of local-area network that uses wireless or high-frequency radio waves rather than wires to communicate between nodes.
-14 Glossary
202-10099-01, April 2005
Télécharger
Lien public mis à jour
Le lien public vers votre chat a été mis à jour. Vous pouvez afficher et gérer vos liens de chat après inscription ici.
Lien public du document
Publicité
Fonctionnalités clés
White, Silver
802.11g
Fast Ethernet
Ethernet WAN
Ethernet LAN (RJ-45) ports: 4
Web-based management
