20. The certificate is issued by the server, click “Install this certificate” to download and store the certificate to your local computer. 21. Click “Yes” to store the certificate to your local computer.
2. Certificate is now installed. All the configuration and certificate download are now complete. Let’s try to connect to the Access Point using 802.1x TLS Authentication.
23. Windows XP will prompt you to select a certificate for wireless network connection. Click on the network connection icon in the system tray to continue.
24. Select the certificate that was issued by the server (WirelessCA), and click “OK” to continue. 25. Check the server to make sure that it’s the server that issues certificate, and click “OK” to complete the authentication process.
MD5 Authentication 26. Select “Data encryption (WEP enabled)” option, but leave other option unselected. 27. Select the key format that you want to use to key in your Network key. ASCII characters: 0~9, a~z and A~Z HEX characters: 0~9, a~f 28. Select the key length that you wish to use 40 bits (5 characters for ASCII, 10 characters for HEX) 104 bits (13 characters for ASCII, 26 characters for HEX) 29. After deciding the key format and key length that you wish to use for network key.
31. Select “Authentication” tab. 32. Select “Enable network access control using IEEE 802.1X” to enable 802.1x authentication. 33. Select “MD-5 Challenge” from the drop-down list box for EAP type. 34. Click “OK” to close Wireless Network Connection Properties window, thus make all the changes effective.
Unlike TLS, which uses digital certificate for validation, the MD-5 Authentication is based on the user account/password. Therefore, you must have a valid account used by the server for validation. 35. WindowsXP will prompt you to enter your user name and password. Click on the network connection icon in the system tray to continue.
36. Enter the user name, password and the logon domain that your account belongs if you have one or more network domain exist in your network. 37. Click “OK” to complete the validation process.
Authenticator: Wireless Network Access Point This is the web page configuration in the Access Point that we use. 1. Enable 802.1x security by selecting “Enable”. 2. If MD5 EAP methods is used then you can skip step 3 and go to step 4. 3. Select the Encryption Key Length Size ranging from 64 to 256 Bits that you would like to use. Select the Lifetime of the Encryption Key from 5 Minutes to 1 Day. As soon as the lifetime of the Encryption Key is over, the Encryption Key will be renewed by the Radius server.
Note!: As soon as 802.1x security is enabled, all the wireless client stations that are connected to the Access Point currently will be disconnected. The wireless clients must be configured manually to authenticate themselves with the Radius server to be reconnected.
Radius Server: Window2000 Server This section to help those who has Windows 2000 Server installed and wants to setup Windows2000 Server for 802.1x authentication, which includes setting up Certificate Service for TLS Authentication, and enable EAP-methods. 1. Login into your Windows 2000 Server as Administrator, or account that has Administrator authority. 2. 3. 4.
5. Select “Enterprise root CA”, and click “Next” to continue. 6. Enter the information that you want for your Certificate Service, and click “Next” to continue.
7. 8. 9. Go to Start > Program > Administrative Tools > Certificate Authority Right-click on the “Policy Setting”, select “new” Select “Certificate to Issue” 10. Select “Authenticated Session” and “Smartcard Logon” by holding down to the Ctrl key, and click “OK” to continue.
11. Go to Start > Program > Administrative Tools > Active Directory Users and Computers. 12. Right-click on domain, and select ”Properties” to continue. 13. Select “Group Policy” tab and click “Properties” to continue.
14. Go to “Computer Configuration” > “Security Settings” > “Public Key Policies” 15. Right-click “Automatic Certificate Request Setting”, and select “New” 16. Click “Automatic Certificate Request ...
17. The Automatic Certificate Request Setup Wizard will guide you through the Automatic Certificate Request setup, simply click “Next” through to the last step. 18. Click “Finish” to complete the Automatic Certificate Request Setup 19. Go to Start > Run, and type “command” and click “Enter” to open Command Prompt. 20. Type “secedit/refreshpolicy machine_policy” to refresh policy.
Adding Internet Authentication Service 21. Go to Start > Control Panel > Add or Remove Programs 22. Select “Add/Remove Windows Components” from the panel on the left. 23. Select “Internet Authentication Service”, and click “OK” to install.
Setting Internet Authentication Service 24. Go to Start > Program > Administrative Tools > Internet Authentication Service 25.
26. Enter the IP address of the Access Point in the Client address text field, a memorable name for the Access Point in the Client-Vendor text field, the access password used by the Access Point in the Shared secret text field. Re-type the password in the Confirmed shared secret text field. 27. Click “Finish” to complete adding of the Access Point.
28. In the Internet Authentication Service, right-click “Remote Access Policies” 29. Select “New Remote Access Policy”. 30. Select “Day-And-Time-Restriction”, and click “Add” to continue.
31. Unless you want to specify the active duration for 802.1x authentication, click “OK” to accept to have 802.1x authentication enabled at all times. 32. Select “Grant remote access permission”, and click “Next” to continue.
33.
For TLS Authentication Setup (Steps 34 ~ 38) 34. Select “Authentication” Tab 35.
36. Go to Start > Program > Administrative Tools > Active Directory Users and Computers 37. Select “Users”, and double-click on the user that can be newly created or currently existing, who will be configured to have the right to obtain digital certificate remotely. Please note that in this case, we have a user called, test, whose account/password are used to obtain the digital certificate from server.
38. Go to the “Dial-in” tab, and check “Allow access” option for Remote Access Permission and “No Callback” for Callback Options.
For MD5 Authentication (Steps 39 ~ 54) 39. Go to Start > Program > Administrative Tools > Active Directory Users and Computers. 40.
41. Select “Group Policy” tab, and click “Edit” to edit the Group Policy.
42. Go to “Computer Configuration” > “Windows Settings” > “Security Settings” > “Account Policies” > “Password Policies” 43. Click “Define this policy setting”, select “Enabled”, and click “OK” to continue.
44. Go to Start > Program > Administrative Tools > Active Directory Users and Computers. 45. Go to Users.
46. Go to “Account” tab, and enable “Store password using reversible encryption” 47. Click “OK” to continue.
48. Go to Start > Program > Administrative Tools > Internet Authentication Service. 49. Go to Remote Access Policies 50. Make sure that MD5 is moved up to Order 1 51.
52. Go to “Authentication” tab 53. Enable “Extensible Authentication Protocol” 54. Select “MD5-Challenge” for EAP type.
APPENDIX D: GLOSSARY Access Point ? An internetworking device that seamlessly connects wired and wireless networks. Ad-Hoc ? An independent wireless LAN network formed by a group of computers, each with an network adapter. AP Client – One of the additional AP operating modes offered by 11Mbps Access Point, which allows the Access Point to act as an Ethernet-to-Wireless Bridge, thus a LAN or a single computer station can join a wireless ESS network through it.
Beacon ? A beacon is a packet broadcast by the Access Point to keep the network synchronized. Included in a beacon are information such as wireless LAN service area, the AP address, the Broadcast destination addresses, time stamp, Delivery Traffic Indicator Maps, and the Traffic Indicator Message (TIM). Bit ? A binary digit, which is either -0 or -1 for value, is the smallest unit for data. Bridge ? An internetworking function that incorporates the lowest 2 layers of the OSI network protocol model.
retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers. Dynamic IP Address ? An IP address that is assigned automatically to a client station in a TCP/IP network by a DHCP server. Encryption ? A security method that uses a specific algorithm to alter the data transmitted, thus prevent others from knowing the information transmitted. ESS ? ESS stands for “Extended Service Set”.
bandwidth for unlicensed use in the ISM (Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4GHz, in particular, is being made available worldwide. MAC Address ? Media Access Control Address is a unique hex number assigned by the manufacturer to any Ethernet networking device, such as a network adapter, that allows the network to identify it at the hardware level. Multicasting ? Sending data to a group of nodes instead of a single destination.
SSID ? Service Set Identifier, which is a unique name shared among all clients and nodes in a wireless network. The SSID must be identical for each clients and nodes in the wireless network. Subnet Mask ? The method used for splitting IP networks into a series of sub-groups, or subnets. The mask is a binary pattern that is matched up with the IP address to turn part of the host ID address field into a field for subnets. TCP/IP ? Transmission Control Protocol/ Internet Protocol.
APPENDIX E: TECHNICAL SPECIFICATION Standard Data Rate Emission Type Data Modulation 802.11b compliant (wireless) 1 / 2 / 5.5 / 11 Mbps Direct Sequence Spread Spectrum (DSSS) 1 Mbps – BPSK 2 Mbps – QPSK 5.5 / 11 Mbps – CCK RF Frequency 2412 MHz – 2462 MHz (North America) 2412 MHz – 2472 MHz (General Europe) 2412 MHz – 2484 MHz (Japan) Operating Channel 11 Channels (North America) 13 Channels (Europe) 14 Channels (Japan) RF Output Power Sensitivity 16 dBm (typical) 1, 2Mbps BPSK, QPSK -92 dBm 5.
