RFC 4851 · INFORMATIONAL · 2007

The Flexible Authentication via Secure Tunneling Extensible Authentication Protocol Method

Overview

RFC 4851, “The Flexible Authentication via Secure Tunneling Extensible Authentication Protocol Method”, is an Informational document published in May 2007 by N. Cam-Winget, D. McGrew, J. Salowey, H. Zhou. It has since been updated by RFC 8996, RFC 9427. The canonical text is published by the RFC Editor.

Abstract

This document defines the Extensible Authentication Protocol (EAP) based Flexible Authentication via Secure Tunneling (EAP-FAST) protocol. EAP-FAST is an EAP method that enables secure communication between a peer and a server by using the Transport Layer Security (TLS) to establish a mutually authenticated tunnel. Within the tunnel, Type-Length-Value (TLV) objects are used to convey authentication related data between the peer and the EAP server. This memo provides information for the Internet community.

Abstract as published in the RFC, via rfc-editor.org.

What “Informational” means

Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.

Read this RFC

The canonical text of RFC 4851 is hosted at rfc-editor.org. Available in TXT,HTML.

Relationships to other RFCs
Updated by
RFC 8996 RFC 9427
Other RFCs from 2007

Who Is Online

In total there are 75 users online: 0 registered, 68 guests and 7 bots.

Most users ever online was 5,555 on 17 Jul 2026, 3:23 am.

Bots: Applebot Baiduspider Bingbot Googlebot Other Bot PetalBot SemrushBot

Users active in the past 15 minutes. Total registered members: 372