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Wireless & Mobility · Advanced

Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling (EAP-FAST)

A Cisco-developed tunneled EAP method (RFC 4851) that can use a Protected Access Credential instead of certificates.

Definition

EAP-FAST uses a PAC to establish a tunnel, with optional server certificates. Phase 0 provisions the PAC, phase 1 builds the tunnel, and phase 2 authenticates the user. Anonymous in-band PAC provisioning is vulnerable to man-in-the-middle attacks. TEAP is its standards-based successor.

Exam tip

EAP-FAST uses PACs; TEAP is the IETF successor that supports EAP chaining.

Related terms