SkyPilot SkyExtender DualBand Installation and Setup Guide
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Internet applications such as email, SSH, FTP, or chat clients. Open access also
makes the network more vulnerable to unauthorized access and malicious
actions (including denial-of-service attacks) than WPA-secured networks.
Wi-Fi protected access (WPA)
Wi-Fi protected access (WPA) is an industry-standard mechanism and protocol
that requires users to be authenticated before they can have access to the
wireless network. (See
http://en.wikipedia.org/wiki/Wi-Fi_Protected_Access
for
more information.)
WPA is implemented with:
o
A client (called a
supplicant
) in the end-user computer or CPE
o
A policing mechanism (called the
authenticator
) in the access point
o
A backend database of user names, passwords, and associated policies (called
the
authentication server
) which is usually based on Radius
WPA uses the IEEE 802.1x and IETF EAP protocols to allow a client to bootstrap a
secure connection with the access point and the Radius server to exchange
credentials (
userName@domain/password
) and keys for encryption of all traffic
between the client and the access point—even after authentication. WPA still
uses WEP for encryption, but it creates keys for each session (not shared with
multiple clients) and has mechanisms (TKIP) whereby the keys change all the
time, thus eliminating the security issues in the original WEP. For even better
encryption, the SkyExtender DualBand can support AES in addition to WEP.
Before you can configure your access point for WPA, you must first configure a
Radius server to support:
o
The IP address and shared secret of the SkyExtender DualBand access point.
o
EAP-PEAP/MSCHAPv2 and EAP-TTLS/PAP or MSCHAPv2 (not EAP-TLS) suitable
for WP. Your Radius supplier can provide instructions.
o
A Users database with user names, passwords. You may also need to identify a
proxy Radius if you’re delegating different domains to other service providers.
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