To set up IEEE 802.1x authentication in Windows XP

To configure settings on the Authentication tab, you must be an administrator or a member of the Administrators group.

1. Open Network Connections in Windows XP.
2. For a wired connection, click the connection for which you want to set up IEEE 802.1x authentication, and then, under Network Tasks, click Change settings of this connection.

   -or-

   For a wireless connection, do the following:

• Click the wireless connection, and then, under Network Tasks, click Change settings of this connection. On the wireless Networks tab, click a wireless network in the list, and then click Properties.
3. On the Authentication tab, make sure that the Enable IEEE 802.1x authentication for this network check box is selected.
4. In EAP type, choose the Extensible Authentication Protocol type to use with this connection.
5. If you choose Smart Card or other Certificate in EAP type, you can configure additional properties. Click Properties and, in Smart Card or other Certificate Properties, do the following:
   • To use your smart card certificate for authentication, click Use my smart card.
   • To use the certificate in your computer's certificate store for authentication, click Use a certificate on this computer.
   • To verify that the server certificate presented to your computer is still valid, select the Validate server certificate check box, specify whether to connect only if the server resides within a particular domain, and then specify the trusted root certification authority.
   • If the user name in the smart card or certificate is not the same as the user name for the domain to which you are logging on, select the Use a different user name for the connection check box.
6. To specify whether the computer should attempt authentication to the network if a user is not logged on, or if the computer or user information is not available, do one of the following:
   • To specify that the computer should attempt authentication to the network if a user is not logged on, select the Authenticate as computer when computer information is available check box.
   • To specify that the computer should attempt authentication to the network if the user information or computer information is not available, select the Authenticate as guest when user or computer information is unavailable check box.

This section is taken from help and support in Windows XP.