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Security
Configuring EAP-FAST
Benefits and
Purpose
EAP-FAST (Flexible Authentication via Secure Tunneling) validates
the identity of devices or users before they gain access to network
resources. You can configure the TPG for the EAP-FAST network
authentication. This makes sure that the TPG gets access to protected networks.
Mode of Operation
EAP-FAST uses (as in the case of EAP-TTLS, see 64) a channel in
order to protect the data transfer. The main difference is that
EAP-FAST does not require certificates for authentication purposes.
(The use of certificates is optional.)
PACs (Protected Access Credentials) are used to build the channel.
PACs are credentials that comprise up to three components.
• A shared secret key that contains the preshared key between the
TPG and the RADIUS server.
• An opaque part that is provided to the TPG and presented to the
RADIUS server when the TPG wishes to obtain access to network
resources.
• Other information that may be useful to the client. (Optional)
EAP-FAST uses two methods to generate PACs:
• The manual delivery mechanism can be every mechanism that
the administrator configures and considers to be safe for the
network.
• In the case of the automatic delivery, an encrypted channel is
established in order to protect the authentication of the TPG as
well as the delivery of the PACs.
Requirements
 The TPG is defined as user (with user name and password) on a
RADIUS server.
Proceed as follows:
1. Start the TPG Control Center.
2. Select SECURITY – Authentication.
3. Select FAST from the Authentication method list.
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