Apple Security for AirPort Networks in Businesses and Classrooms, Transmitter Power Control

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Password Protection and Encryption

AirPort uses password protection and encryption to deliver a level of security comparable to that of traditional wired networks. Users can be required to enter a password to log in to the AirPort network. When transmitting data and passwords, the wireless device uses up to 128-bit encryption, through either Wi-Fi Protected Access (WPA), WPA2, or Wired Equivalent Privacy (WEP), to scramble data and help keep

it safe. If you’re setting up an 802.11n-based AirPort device, you can also use WEP (Transitional Security Network) if both WEP-compatible and WPA/WPA2-compatible computers will join your network.

Note: WPA security is available only to AirPort Extreme wireless devices; AirPort and AirPort Extreme clients using Mac OS X 10.3 or later and AirPort 3.3 or later; and to non-Apple clients using other 802.11 wireless adapters that support WPA. WPA2 security requires firmware version 5.6 or later for an AirPort Extreme Base Station, firmware version 6.2 or later for an AirPort Express, firmware version 7.3 or later for a Time Capsule, and a Macintosh computer with an AirPort Extreme wireless card using AirPort 4.2 or later. If your computer uses Windows XP or Windows Vista, check the documentation that came with your computer to see if your computer supports WPA2.

Security for AirPort Networks in Businesses and Classrooms

Businesses and schools need to restrict network communications to authorized users and keep data safe from prying eyes. To meet this need, Apple wireless devices and software provide a robust suite of security mechanisms. Use AirPort Utility to set up these advanced security features.

Transmitter Power Control

Because radio waves travel in all directions, they can extend outside the confines of a specific building. The Transmit Power setting in AirPort Utility lets you adjust the transmission range of your device’s network. Only users within the network vicinity have access to the network.

MAC Address Access Control

Every AirPort and wireless card have a unique Media Access Control (MAC) address. For AirPort Cards and AirPort Extreme Cards, the MAC address is sometimes referred to as the AirPort ID. Support for MAC address access control lets administrators set up a list of MAC addresses and restrict access to the network to only those users whose MAC addresses are in the access control list.

Chapter 2 AirPort Security

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Contents Apple AirPort Networks Contents Getting Started Getting Started Getting Started Extending the Range of Your AirPort Network Printing with an Apple Wireless DeviceSharing Your Computer’s Internet Connection Getting Started To start Internet sharing on a computer using Windows NAT Firewall Security for AirPort Networks at HomeClosed Network MAC Address Access Control Password Protection and EncryptionTransmitter Power Control Security for AirPort Networks in Businesses and ClassroomsWi-Fi Protected Access WPA and WPA2 Radius SupportWPA and WPA2 Personal WPA and WPA2 Enterprise Configuring and Sharing Internet Access Setting Up the AirPort Extreme NetworkSetting Advanced Options Setting AirPort preferences Using AirPort UtilityTo set AirPort preferences To set up your wireless device manually If you don’t see your wireless device in the listSetting Up the AirPort Extreme Network If you can’t open the wireless device settingsAirPort Network Designs Give the Device a Name Wireless Device SettingsChange the Device Password Other InformationSet Device Options Wireless Network SettingsSetting the Wireless Mode Naming the AirPort Extreme NetworkPassword-protect Your Network Choosing the Radio ModeChanging the Channel Setting Wireless Options Setting Additional Wireless Options Use the Wireless Options pane to set the followingSetting up a Guest Network Configuring and Sharing Internet AccessYou’re Using a DSL or Cable Modem How It Works What It Looks LikeWhat You Need for a DSL or Cable Modem Connection What to Do AirPort Network Designs AirPort Network Designs AirPort Network Designs AirPort Network Designs Setting Dhcp and NAT Options AirPort Network Designs Setting Up Client Computers Setting Dhcp Only OptionsTo configure TCP/IP on client computers using Mac OS X Next, choose Dhcp from the Configure IPv4 pop-up menu To configure TCP/IP on client computers using Windows To configure TCP/IP on client computersAirPort Network Designs You’re Using an Existing Ethernet Network What You Need for an Ethernet ConnectionWhat to Do AirPort Network Designs AirPort Extreme Ethernet WAN port Time Capsule Setting Advanced Options Setting Up Roaming To set up roamingExtending the Range of an 802.11n Network To extend the range of an 802.11n networkControlling the Range of Your AirPort Network To shorten the range of your AirPort networkUsing Wi-Fi Protected Access To help protect your network and wireless deviceKeeping Your Network Secure To set up a WPA or WPA2 Enterprise network To set up a WPA or WPA2 Personal networkSetting Up Access Control To set up the access control listUsing a Radius Server To set up authentication using a Radius serverAirPort Network Designs To set up inbound port mapping To set up logging To set up a default hostLogging To set up Back to My Mac on your wireless device Using Back to My Mac on your Wireless NetworkTo set the time automatically Customizing the IPv6 firewall Setting up IPv6To adjust IPv6 firewall settings To manually set IPv6 optionsSharing and Securing USB Hard Disks on Your Network To share a hard disk on your networkConnecting a USB Printer to an Apple Wireless Device Using a Time Capsule in Your NetworkTo use a printer on your network To allow client access to your network Adding a Wireless Client to Your 802.11n NetworkTo change the name of your USB printer On a computer using Mac OS Solving ProblemsOn a computer using Windows AirPort Utility Help More Information About AirPortWorld Wide Web Hardware Addresses How Information Reaches Its DestinationPackets and Traffic IP AddressesRules for Sending Information Protocols Using the AirPort Extreme Base StationBase Station Interfaces Time Capsule Interfaces Using the Time CapsuleUsing the AirPort Express AirPort Express InterfacesApple Wireless Device Functions Items That Can Cause Interference with AirPort Glossary Glossary Glossary Glossary Glossary Glossary Glossary Glossary
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