What is EAP authentication process? The authenticator (the server) sends a Request to authenticate the peer (the client). The peer sends a Response packet in reply to a valid Request. The authenticator sends an additional Request packet, and the peer replies with a Response.

What is EAP-FAST protocol?

EAP-FAST, also known as Flexible Authentication via Secure Tunneling, is an EAP (Extensible Authentication Protocol) developed by Cisco. It is used in wireless networks and point-to-point connections to perform session authentication. Its purpose is to replace the LEAP (lightweight extensible authentication protocol).

What are the different EAP methods?

Tunneled EAP methods

  • EAP-TLS (Transport Layer Security)
  • EAP-TTLS (Tunneled TLS)
  • LEAP (Lightweight EAP)
  • PEAP (Protected EAP)
  • EAP-FAST (Flexible Authentication via Secure Tunneling)
  • EAP-SIM (Subscriber Identity Module)
  • EAP-MD5 (Message Digest 5)

What is the difference between CHAP and EAP?

CHAP is not an EAP method, and is only supported by TTLS. CHAP (and methods similar to CHAP, such as MS-CHAP and MS-CHAP-V2) is selected by network managers who are concerned about passing the password between the client and authentication server.

Which EAP method is most secure?

EAP-TLS. This is the most secure method as it requires certificates from client and server end. The process involves mutual authentication where client validates server certificate and server validates client certificate. Hence, it is difficult to implement.

What is EAP method TLS?

EAP-TLS (Transport Layer Security) provides for certificate-based and mutual authentication of the client and the network. EAP-FAST authenticates by means of a PAC (Protected Access Credential) which can be managed dynamically by the authentication server.

Which is the 3rd phase of operation in the IEEE 802.11 i protocol?

Key management
Explanation: Key management is the 3rd Phase of operation in the IEEE 802.11i Protocol.

What is EAP authentication in networking?

Extensible Authentication Protocol (EAP) Extensible Authentication Protocol (EAP) is an authentication framework, not a specific authentication mechanism, frequently used in wireless networks and point-to-point connections. It provides some common functions and negotiation of authentication methods called EAP methods.

How does EAP-FAST use protected access credentials (PAC)?

Cisco implementations use this for user and machine authentications. EAP-FAST utilizes Protected Access Credentials (PAC) in order to quickly establish the TLS tunnel (session resume) or to authorize the user/machine (skip inner method for authentication). There are 3 phases for EAP-FAST: EAP-FAST supports PAC-less and PAC-based conversation.

How to enable EAP-FAST authentication in Nam?

Under ” User Auth ” tab specify EAP-FAST as allowed authentication method and disable server certificate validation, since we aren’t using trusted certificates in this example. Note: in real production enviroment ensure that you have trusted certificate installed on ISE and keep server certificate validation option enabled in NAM settings.

Where can I find EAP-FAST?

EAP-FAST is available as an informational Internet draft at To bootstrap the process securely, EAP-FAST establishes a shared secret (between the client and the authentication server) referred to as the Protected Access Credential Key (PAC-Key).