This document explains how to verify the client driver version and how
to use the Cisco Light Extensible Authentication Protocol (LEAP) in the
Microsoft Windows XP operating system.
Cisco recommends that you have knowledge of the use of Windows XP
This document is applicable to all Cisco Aironet Client Adapter cards
that are installed in PCs that run the Windows XP operating system.
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
Technical Tips Conventions for more information on document
In order to verify the driver that is loaded on the computer, follow
From the Windows desktop, right-click the My
Computer icon and choose
Click the Hardware tab.
Click Device Manager.
Expand Network Adapters and choose the Cisco
Right-click the Cisco wireless adapter and choose
Click the Driver tab.
The driver version is listed on this tab.
If you complete this procedure and find that you do not have the
driver for your wireless client adapter card, complete the procedure in
the Client Adapter.
Windows XP includes wireless networking in its operating system.
Microsoft includes its own utility that you can use to configure the wireless
card settings. In order to use LEAP, use the Aironet Client Utility (ACU) for
LEAP login and disable the Windows XP setup utility.
As with most password-based authentication algorithms, LEAP is
vulnerable to dictionary attacks. This kind of attack is not a new attack or
new vulnerability of LEAP. Create a strong password policy in order to most
effectively mitigate dictionary attacks. Use strong passwords and have them
periodically expire. Refer to
Attack on Cisco LEAP Vulnerability for more information about dictionary
attacks and how to prevent them.
In order to disable the Windows XP setup utility, complete these steps:
Choose Start > Control Panel.
Right-click Wireless Network and choose
The Wireless Network Connection Properties window appears.
Click the Wireless Networks
Uncheck Use Windows to configure my wireless network
This allows you to use the ACU to configure the Service Set
Identifier (SSID) and the security settings on the wireless adapter.